新增cdsl

2026-08-24 14:52:08 +08:00
parent fd8c0c37ad
commit 9f8a55ff07
3892 changed files with 2872721 additions and 9169 deletions
@@ -33,6 +33,7 @@ build/

 # Runtime data and generated local artifacts
 backend/data/
+json_to_cdsl/input/

 # Logs
 *.log
@@ -0,0 +1,33 @@
+{
+  "built_count": 4,
+  "compiled_count": 4,
+  "complete": true,
+  "completed_count": 4,
+  "failure_category_counts": {
+    "geometry_mismatch": 4
+  },
+  "geometry_verified_count": 0,
+  "input_directory": "json_to_cdsl/output",
+  "part_count": 4,
+  "results": [
+    {
+      "part_id": "050123",
+      "report": "parts/050123.report.json"
+    },
+    {
+      "part_id": "068453",
+      "report": "parts/068453.report.json"
+    },
+    {
+      "part_id": "070825",
+      "report": "parts/070825.report.json"
+    },
+    {
+      "part_id": "115738",
+      "report": "parts/115738.report.json"
+    }
+  ],
+  "runtime_eligible_count": 4,
+  "schema": "cdsl.engine.batch-rebuild.v1",
+  "semantic_valid_count": 4
+}
@@ -0,0 +1,998 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('Open CASCADE Model'),'2;1');
+FILE_NAME('Open CASCADE Shape Model','2026-08-24T10:12:48',('Author'),(
+    'Open CASCADE'),'Open CASCADE STEP processor 7.9','build123d',
+  'Unknown');
+FILE_SCHEMA(('AUTOMOTIVE_DESIGN { 1 0 10303 214 1 1 1 1 }'));
+ENDSEC;
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+#232 = DEFINITIONAL_REPRESENTATION('',(#233),#237);
+#233 = LINE('',#234,#235);
+#234 = CARTESIAN_POINT('',(-0.,0.));
+#235 = VECTOR('',#236,1.);
+#236 = DIRECTION('',(-1.,0.));
+#237 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#238 = ADVANCED_FACE('',(#239,#265),#165,.F.);
+#239 = FACE_BOUND('',#240,.F.);
+#240 = EDGE_LOOP('',(#241));
+#241 = ORIENTED_EDGE('',*,*,#242,.T.);
+#242 = EDGE_CURVE('',#243,#243,#245,.T.);
+#243 = VERTEX_POINT('',#244);
+#244 = CARTESIAN_POINT('',(-4.,10.2,0.));
+#245 = SURFACE_CURVE('',#246,(#251,#258),.PCURVE_S1.);
+#246 = CIRCLE('',#247,4.);
+#247 = AXIS2_PLACEMENT_3D('',#248,#249,#250);
+#248 = CARTESIAN_POINT('',(0.,10.2,0.));
+#249 = DIRECTION('',(0.,-1.,0.));
+#250 = DIRECTION('',(-1.,0.,0.));
+#251 = PCURVE('',#165,#252);
+#252 = DEFINITIONAL_REPRESENTATION('',(#253),#257);
+#253 = CIRCLE('',#254,4.);
+#254 = AXIS2_PLACEMENT_2D('',#255,#256);
+#255 = CARTESIAN_POINT('',(0.,0.));
+#256 = DIRECTION('',(1.,0.));
+#257 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#258 = PCURVE('',#227,#259);
+#259 = DEFINITIONAL_REPRESENTATION('',(#260),#264);
+#260 = LINE('',#261,#262);
+#261 = CARTESIAN_POINT('',(-0.,8.2));
+#262 = VECTOR('',#263,1.);
+#263 = DIRECTION('',(-1.,0.));
+#264 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#265 = FACE_BOUND('',#266,.F.);
+#266 = EDGE_LOOP('',(#267));
+#267 = ORIENTED_EDGE('',*,*,#148,.T.);
+#268 = ADVANCED_FACE('',(#269),#227,.T.);
+#269 = FACE_BOUND('',#270,.F.);
+#270 = EDGE_LOOP('',(#271,#272,#293,#294));
+#271 = ORIENTED_EDGE('',*,*,#210,.T.);
+#272 = ORIENTED_EDGE('',*,*,#273,.T.);
+#273 = EDGE_CURVE('',#211,#243,#274,.T.);
+#274 = SEAM_CURVE('',#275,(#279,#286),.PCURVE_S1.);
+#275 = LINE('',#276,#277);
+#276 = CARTESIAN_POINT('',(-4.,2.,0.));
+#277 = VECTOR('',#278,1.);
+#278 = DIRECTION('',(0.,1.,0.));
+#279 = PCURVE('',#227,#280);
+#280 = DEFINITIONAL_REPRESENTATION('',(#281),#285);
+#281 = LINE('',#282,#283);
+#282 = CARTESIAN_POINT('',(-0.,0.));
+#283 = VECTOR('',#284,1.);
+#284 = DIRECTION('',(-0.,1.));
+#285 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#286 = PCURVE('',#227,#287);
+#287 = DEFINITIONAL_REPRESENTATION('',(#288),#292);
+#288 = LINE('',#289,#290);
+#289 = CARTESIAN_POINT('',(-6.28318530718,0.));
+#290 = VECTOR('',#291,1.);
+#291 = DIRECTION('',(-0.,1.));
+#292 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#293 = ORIENTED_EDGE('',*,*,#242,.F.);
+#294 = ORIENTED_EDGE('',*,*,#273,.F.);
+#295 = ( GEOMETRIC_REPRESENTATION_CONTEXT(3) 
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#299)) GLOBAL_UNIT_ASSIGNED_CONTEXT
+((#296,#297,#298)) REPRESENTATION_CONTEXT('Context #1',
+  '3D Context with UNIT and UNCERTAINTY') );
+#296 = ( LENGTH_UNIT() NAMED_UNIT(*) SI_UNIT(.MILLI.,.METRE.) );
+#297 = ( NAMED_UNIT(*) PLANE_ANGLE_UNIT() SI_UNIT($,.RADIAN.) );
+#298 = ( NAMED_UNIT(*) SI_UNIT($,.STERADIAN.) SOLID_ANGLE_UNIT() );
+#299 = UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-07),#296,
+  'distance_accuracy_value','confusion accuracy');
+#300 = PRODUCT_RELATED_PRODUCT_CATEGORY('part',$,(#7));
+ENDSEC;
+END-ISO-10303-21;
@@ -0,0 +1,9 @@
+{
+  "extrude_add_blind": 2,
+  "extrude_add_two_sided": 1,
+  "hole_wizard": 2,
+  "reference_axis": 9,
+  "reference_plane": 23,
+  "revolve_add": 2,
+  "revolve_cut": 1
+}
@@ -0,0 +1 @@
+{}
@@ -1,3 +1,8 @@
+---
+name: cad-engine
+description: Generate and revise executable CDSL CAD models through the local schema, runtime, library references, and injected part-family planning bridges.
+---
+
 # CAD Engine Skill

 ## Purpose
@@ -6,15 +11,33 @@ Help an AI agent generate CAD models through the repository's CDSL engine.

 ## Required workflow

-1. Read the engine README, `profile_schema.json`, `cdsl_schema.json`, and the
-   relevant engine modules. `cdsl_schema.json` is the executable CDSL input
-   contract; its nested object and array shapes are mandatory.
-2. Search the official CDSL library for similar parts, profiles, and feature
-   sequences.
-3. Produce or revise parameterized CDSL.
-4. Validate that the CDSL can run through the `cdsl_only` path.
-5. Compile the CDSL and generate a STEP file.
-6. Return the generated artifact, validation result, and library references.
+1. Use any injected CDSL part-skill bridge to establish the part structure,
+   parameter roles, and feature order. It is planning guidance only.
+2. Submit a complete DesignIntent before reading CDSL references or generating
+   CDSL. It contains semantic structures and mappings, never sketch coordinates
+   or raw CAD code. The backend records canonical selected part skills.
+3. Read the engine README, `profile_schema.json`, and `cdsl_schema.json`, then
+   search the official CDSL library for schema-valid profiles and feature
+   expressions. `cdsl_schema.json` is the executable input contract.
+4. Produce parameterized CDSL in feature dependency order, using the accepted
+   DesignIntent's feature IDs and mappings plus the part
+   plan for intent and CDSL references for concrete schema expressions.
+5. Call the generation tool only when every chosen feature is executable by
+   the current schema and runtime. Validate through the `cdsl_only` path,
+   then generate STEP and GLB artifacts.
+
+## Part-skill boundary
+
+- User requirements and the CDSL schema/runtime override bridge guidance;
+  CDSL examples are lower-priority expression references.
+- Do not expose upstream source skills directly or treat them as code. Use
+  only the injected CDSL bridge content.
+- Never emit build123d source or invent an atomic, profile, selector, or
+  capability that the local contract does not support.
+- Express circular bolt layouts as explicit circles when supported; preserve
+  thread intent as a cylindrical-bore approximation; omit fillets/chamfers
+  without a unique selector. These decisions must be recorded in the build
+  audit rather than hidden in generated geometry.

 ## Hard constraints

@@ -0,0 +1,40 @@
+# DesignIntent Planning Recipe
+
+## Requirement analysis
+
+1. Treat the backend-injected part-family skill as the selected family before
+   identifying structures. It provides planning guidance only.
+2. Decompose the requested part into structures with roles: `base`,
+   `reference`, `additive`, `subtractive`, `dressup`, or `pattern`.
+3. Every structure must state a purpose, structural dependencies, parameter
+   roles, selector roles, an executable CDSL atomic ID, and a named profile
+   type when its atomic needs a sketch.
+4. Put every structure exactly once in `feature_order`, after its dependencies.
+   Its `cdsl_feature_id` is the immutable ID that the later CDSL feature must use.
+5. Do not put coordinates, raw CDSL, Build123d, or low-level sketch data in a
+   DesignIntent.
+6. Missing essential dimensions are blocking `open_questions`. Unsupported
+   geometry is a `capability_gaps` item. A blocking item requires
+   `status: needs_clarification`; do not approximate silently.
+
+## Part family boundary
+
+- Use only the backend-injected primary and support skills. Never submit
+  `part_skill_ids`; the backend records the canonical selection for audit.
+- Explicit user requirements override part skills. The executable CDSL
+  schema/runtime overrides both part skills and library examples.
+- The current primary family is inherited during revisions unless the user
+  explicitly asks to replace the whole part. A family conflict needs a concise
+  clarification before a ready plan can be submitted.
+- CDSL library examples show only expression patterns. They never add or remove
+  a requested DesignIntent structure.
+
+## CDSL generation
+
+- Submit `propose_design_intent` before any library or CDSL-generation call.
+- After its ready result includes `intent_id`, inspect references and generate
+  complete CDSL. Use every planned `cdsl_feature_id` once, in `feature_order`.
+- Do not add undeclared CDSL features, delete planned features, change planned
+  atomics/profiles, or omit declared selector evidence.
+- Keep `cdsl_only` as the only build path. Never use `compiler_context` or a
+  legacy fallback.
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 earthtojake
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
@@ -0,0 +1,36 @@
+# Part Skill Provenance
+
+The files under `source/` are copied from the local `cadSet` checkout:
+
+`/Users/lk/Projects/cadSet/text-to-cad/skills/cad/references/cad-skillx/`
+
+The source planning, functional, and atomic documents are MIT licensed by
+earthtojake. The files under `bridge/` are local CDSL-specific adaptations.
+They preserve the structural guidance while documenting the current CDSL
+schema/runtime boundary. Keep the source copies unchanged when possible and
+review future upstream updates manually.
+
+Each local `source/` path maps to the same relative path below the upstream
+root above. The copied source documents are:
+
+- `planning/mounting-plate.planning.md`
+- `planning/mounting-bracket.planning.md`
+- `planning/flange.planning.md`
+- `planning/simple-shaft-or-cylindrical-rod.planning.md`
+- `planning/bearing-housing-or-seat.planning.md`
+- `planning/hexagonal-nut.planning.md`
+- `functional/axisymmetric-revolve-strategy.functional.md`
+- `functional/bearing-bore-seat.functional.md`
+- `functional/flange-bolt-circle.functional.md`
+- `functional/mounting-plate-hole-layout.functional.md`
+- `functional/slotted-adjustment-feature.functional.md`
+- `functional/standard-hole-wizard.functional.md`
+- `functional/symmetric-feature-layout.functional.md`
+- `atomic/coaxial-bore-rule.atomic.md`
+- `atomic/counterbored-hole-creation.atomic.md`
+- `atomic/extrude-base-profile.atomic.md`
+- `atomic/fillet-chamfer-last.atomic.md`
+- `atomic/pattern-holes-from-datum.atomic.md`
+- `atomic/revolve-profile-around-axis.atomic.md`
+- `atomic/threaded-hole-creation.atomic.md`
+- `atomic/through-hole-cut.atomic.md`
@@ -0,0 +1,5 @@
+# CDSL Bridge: Coaxial Bore
+
+- Share one explicit axis or workplane origin across bore, seat, hub, sleeve, and clearance features.
+- Keep each diameter role distinct. Use sequential cuts for a through clearance plus a deeper/larger seat.
+- Prefer `reference_axis`, explicit frames, `revolve_cut`, or circular cut profiles; do not infer a new axis from arbitrary topology.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Counterbored Hole
+
+- A counterbore is a smaller functional hole plus a larger, shallow coaxial recess.
+- Use `hole_counterbore` or `hole_wizard` with `counterbore` fields when host placement is resolvable.
+- Preserve main diameter, depth, counterbore diameter, and counterbore depth separately.
+- Do not use a plain blind hole when the screw-head seat is part of the request.
@@ -0,0 +1,5 @@
+# CDSL Bridge: Extrude Base
+
+- Start with a closed named profile and a workplane. Use `extrude_add_blind` for a plate, block, annulus, hex body, or constant cylinder.
+- Keep the base simple; add holes, slots, bosses, and finishing as dependent features.
+- Use one coherent body unless separate solids are explicitly requested.
@@ -0,0 +1,5 @@
+# CDSL Bridge: Fillet And Chamfer Last
+
+- Apply `fillet` and `chamfer` only after primary adds, bores, holes, pockets, and patterns.
+- Both operations require selectors that resolve uniquely on the active body.
+- If no stable selector is available, omit the finishing operation and record `omitted: selector_unavailable`; never apply it to every edge.
@@ -0,0 +1,5 @@
+# CDSL Bridge: Pattern Holes From Datum
+
+- Build a valid seed hole first and preserve its host frame and functional subtype.
+- Use `pattern_linear` for one/two-dimensional rows and `pattern_mirror` for symmetry.
+- For circular layouts, use an explicit `circles` profile expansion and record the audit status; do not invent a circular-pattern atomic.
@@ -0,0 +1,5 @@
+# CDSL Bridge: Revolve Profile
+
+- Use a closed side profile and explicit axis with `revolve_add` or `revolve_cut`.
+- Use 360 degrees unless a partial sector is requested. Keep the profile from crossing the axis invalidly.
+- Add flats, slots, keyways, and bolt holes only after the rotational body is valid.
@@ -0,0 +1,5 @@
+# CDSL Bridge: Threaded Hole
+
+- Preserve thread size/depth as user intent and use the supported hole contract for the bore.
+- Current CDSL runtime does not generate helical thread topology. Do not claim that it does.
+- Record `approximated: thread_geometry_omitted` in the revision audit and include the bore dimensions used.
@@ -0,0 +1,5 @@
+# CDSL Bridge: Through Hole
+
+- Use a host face/frame and an explicit diameter. Prefer `hole_wizard` with a through end condition when its selector contract is complete.
+- Otherwise use a circular sketch and a cut depth that is explicitly sufficient for the body, preserving the through-hole intent in the feature name/assumptions.
+- Keep central bores on the main axis and repeated holes in a pattern or explicit circle group.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Axisymmetric Revolve
+
+- Choose a closed half-profile and an explicit `axis` for `revolve_add` or `revolve_cut`.
+- Use 360 degrees for a complete body. Keep the profile on one valid side of the axis.
+- Prefer revolve for steps, shoulders, tapers, grooves, sleeves, and turned parts; use circle extrusion for a constant cylinder.
+- Validate one coherent solid and shared axis before adding non-axisymmetric cuts.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Bearing Bore Seat
+
+- Build enough support material first, then cut the smaller shaft clearance and larger bearing seat on the same frame.
+- Use a defined seat depth and shoulder; never collapse both diameters into one hole.
+- Express coaxial cuts with explicit frames or a stable reference axis/plane. Mounting holes follow the seat relationship.
+- If a selector cannot identify the seat face uniquely, stop the dependent feature and report the blocker.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Flange Bolt Circle
+
+- Keep bolt-circle diameter, count, start angle, and hole diameter explicit.
+- Since the runtime has no circular-pattern atomic, expand the layout into explicit circle centers in a `circles` profile and cut them together.
+- This is a semantic expansion, not an arbitrary approximation; report `expanded: circular_pattern_to_explicit_circles`.
+- Do not use a rectangular grid for a circular flange.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Mounting Plate Hole Layout
+
+- Establish plate edge/center datums before hole placement.
+- Use one seed hole or explicit hole group, then `pattern_linear` or `pattern_mirror` for rows and symmetry.
+- Select clearance, threaded, counterbored, or countersunk intent from the request; do not reduce every hole to a generic cylinder.
+- Preserve margins and pitch. Finish after all functional holes and slots.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Slotted Adjustment
+
+- A slot is an obround cut with equal end radii, dimensioned by width, length, and a datum frame.
+- Use an `obround` sketch and `extrude_cut_blind`/through-depth after the base exists.
+- A slot is not a shaft keyway or revolved groove. Pattern or mirror only after the seed cut is valid.
+- Leave material at slot ends and finish slot edges last when selectors are available.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Standard Hole Wizard
+
+- Choose the hole subtype from function: clearance, blind, through, counterbore, countersink, or threaded intent.
+- Use `hole_wizard` only with its exact schema fields and a resolvable host face, or use a self-contained circular cut when the frame is explicit.
+- Positions are objects such as `{"mm": [u, v, w]}`; never emit bare coordinate arrays.
+- Thread metadata is retained as intent but current geometry is cylindrical; report the approximation.
@@ -0,0 +1,6 @@
+# CDSL Bridge: Symmetric Feature Layout
+
+- Define a centerline, plane, or datum before placing symmetric features.
+- Use `pattern_mirror` for a mirrored source feature and `pattern_linear` for regular rows.
+- The source feature must execute first and its transformed selectors/frames must remain uniquely resolvable.
+- Never create symmetry by independently guessed coordinates when a pattern contract is available.
@@ -0,0 +1,7 @@
+# CDSL Bridge: Bearing Housing
+
+- Use for a bearing seat, bearing support, pillow-block-like body, or bushing seat, not a rolling-bearing assembly.
+- Invariants: one bearing axis, distinct bearing seat and shaft-clearance diameters, a locating shoulder/depth, and a mounting base or flange.
+- Plan: base/support add -> coaxial shaft bore -> larger bearing pocket/counterbore -> mounting holes -> ribs/bosses -> late finishing.
+- Keep bearing outer diameter, seat depth, shaft clearance, center height, wall thickness, and mounting pattern separate.
+- Ribs must connect base and support; never add floating decorative ribs.
@@ -0,0 +1,7 @@
+# CDSL Bridge: Flange
+
+- Use for a circular flange, flanged sleeve, or coupling flange with a shared central axis.
+- Invariants: coaxial outside diameter, bore/hub, sealing land, and fastener holes on a pitch circle.
+- Plan: `revolve_add` for stepped axisymmetric bodies or circular `extrude_add_blind` -> coaxial bore -> one bolt-hole definition -> explicit circle set or supported repetition -> late finishing.
+- No circular-pattern atomic exists. Expand a bolt circle into explicit circles in one cut profile and record `expanded` in the audit.
+- Keep bolt-circle diameter, count, start angle, bore, and hub dimensions distinct.
@@ -0,0 +1,7 @@
+# CDSL Bridge: Hexagonal Nut
+
+- Use for a hex body with a centered internal threaded-bore intent.
+- Invariants: across-flats, thickness, centered bore, and functional lead-in chamfers.
+- Plan: polygon/hex `extrude_add_blind` -> centered bore or `hole_wizard` -> thread audit -> finishing when selectors are valid.
+- Preserve across-flats separately from thread/bore diameter. Do not create a mating bolt.
+- Current runtime does not create helical threads; represent the bore and record `approximated: thread_geometry_omitted`.
@@ -0,0 +1,7 @@
+# CDSL Bridge: Mounting Bracket
+
+- Use for an L/U/T bracket or a support with a base plus web, lug, tab, or boss.
+- Invariants: one coherent body, a load path from base to web/boss, datum-driven holes, and no invented fastener assembly.
+- Plan: base `extrude_add_blind` -> web/tab/boss add features -> clearance/slot cuts -> holes -> mirror/linear repetition -> late edge treatment.
+- Use named planar profiles and explicit workplanes. Keep holes after the support geometry so they do not float.
+- Do not flatten a 3D bracket into a plate or add fillets without a valid selector.
@@ -0,0 +1,7 @@
+# CDSL Bridge: Mounting Plate
+
+- Use for a mostly uniform plate, base, adapter, fixture, or panel.
+- Invariants: a named rectangular/rounded profile, thickness, datum-based holes, and functional cutouts.
+- Plan: `extrude_add_blind` base -> `hole_wizard` or cut-hole features -> `pattern_linear`/`pattern_mirror` -> slots and pockets -> late `fillet`/`chamfer` only with selectors.
+- Prefer `rectangle`, `rectangle_with_fillets`, or `obround` profiles. Keep edge margins and pitch as named numeric parameters.
+- Rectangular hole groups use linear/mirror patterns; never use circular-pattern semantics for a plate.
@@ -0,0 +1,7 @@
+# CDSL Bridge: Simple Shaft
+
+- Use for a single cylindrical rod, pin, spacer, or stepped shaft, not an assembly.
+- Invariants: one main axis, one coherent solid, axial segment lengths/diameters, and secondary features referenced to the axis.
+- Use a circle plus `extrude_add_blind` for a uniform rod; use a closed side profile plus `revolve_add` for steps, shoulders, tapers, or grooves.
+- Add end holes, flats, slots, or keyway-like cuts only after the primary body. Finish last.
+- Do not invent bearings, gears, couplings, or real thread geometry when not requested.
@@ -0,0 +1,96 @@
+{
+  "schema_version": "1.0",
+  "max_planning": 1,
+  "max_support": 3,
+  "skills": [
+    {
+      "id": "planning/mounting-plate",
+      "kind": "planning",
+      "title": "Mounting Plate",
+      "priority": 100,
+      "triggers": ["mounting plate", "base plate", "adapter plate", "fixture plate", "安装底板", "底板", "转接板", "连接板", "面板"],
+      "exclude": ["flange", "法兰", "3d bracket", "mounting bracket", "轴承座"],
+      "bridge": "bridge/planning-mounting-plate.md",
+      "source": "source/planning/mounting-plate.planning.md",
+      "capability_translation_rules": ["exact: schema_valid_feature_sequence"],
+      "related": ["functional/mounting-plate-hole-layout", "functional/slotted-adjustment-feature", "functional/standard-hole-wizard", "functional/symmetric-feature-layout", "atomic/extrude-base-profile", "atomic/pattern-holes-from-datum", "atomic/fillet-chamfer-last"]
+    },
+    {
+      "id": "planning/mounting-bracket",
+      "kind": "planning",
+      "title": "Mounting Bracket",
+      "priority": 99,
+      "triggers": ["mounting bracket", "support bracket", "l bracket", "u bracket", "t bracket", "bracket with holes", "安装支架", "支撑架", "L型支架", "U型支架"],
+      "exclude": ["flat mounting plate only", "仅底板", "sheet metal"],
+      "bridge": "bridge/planning-mounting-bracket.md",
+      "source": "source/planning/mounting-bracket.planning.md",
+      "capability_translation_rules": ["exact: schema_valid_feature_sequence"],
+      "related": ["functional/slotted-adjustment-feature", "functional/standard-hole-wizard", "functional/symmetric-feature-layout", "atomic/extrude-base-profile", "atomic/pattern-holes-from-datum", "atomic/fillet-chamfer-last"]
+    },
+    {
+      "id": "planning/flange",
+      "kind": "planning",
+      "title": "Flange",
+      "priority": 98,
+      "triggers": ["flange", "circular flange", "pipe flange", "coupling flange", "flanged sleeve", "法兰", "法兰盘", "管法兰", "联轴器法兰"],
+      "exclude": ["flange nut", "法兰螺母", "side tab"],
+      "bridge": "bridge/planning-flange.md",
+      "source": "source/planning/flange.planning.md",
+      "capability_translation_rules": ["expanded: circular_pattern_to_explicit_circles"],
+      "related": ["functional/flange-bolt-circle", "functional/axisymmetric-revolve-strategy", "functional/standard-hole-wizard", "atomic/coaxial-bore-rule", "atomic/revolve-profile-around-axis", "atomic/pattern-holes-from-datum", "atomic/fillet-chamfer-last"]
+    },
+    {
+      "id": "planning/simple-shaft",
+      "kind": "planning",
+      "title": "Simple Shaft Or Cylindrical Rod",
+      "priority": 97,
+      "triggers": ["simple shaft", "cylindrical rod", "stepped shaft", "shaft", "rod", "pin", "standoff", "轴", "阶梯轴", "圆柱杆", "销", "支柱"],
+      "exclude": ["spindle assembly", "bearing assembly", "gearbox shaft assembly", "主轴组件", "轴承组件"],
+      "bridge": "bridge/planning-simple-shaft.md",
+      "source": "source/planning/simple-shaft-or-cylindrical-rod.planning.md",
+      "capability_translation_rules": ["exact: revolve_or_extrude_supported"],
+      "related": ["functional/axisymmetric-revolve-strategy", "atomic/coaxial-bore-rule", "atomic/revolve-profile-around-axis", "atomic/through-hole-cut", "atomic/fillet-chamfer-last"]
+    },
+    {
+      "id": "planning/bearing-housing",
+      "kind": "planning",
+      "title": "Bearing Housing Or Seat",
+      "priority": 96,
+      "triggers": ["bearing housing", "bearing seat", "bearing support", "bearing block", "bushing seat", "pillow block", "轴承座", "轴承支架", "轴承块", "衬套座", "带座轴承"],
+      "exclude": ["complete rolling bearing", "bearing assembly", "完整轴承", "轴承组件"],
+      "bridge": "bridge/planning-bearing-housing.md",
+      "source": "source/planning/bearing-housing-or-seat.planning.md",
+      "capability_translation_rules": ["blocked: selector_required_for_dependent_features"],
+      "related": ["functional/bearing-bore-seat", "functional/standard-hole-wizard", "atomic/coaxial-bore-rule", "atomic/extrude-base-profile", "atomic/revolve-profile-around-axis", "atomic/counterbored-hole-creation", "atomic/fillet-chamfer-last"]
+    },
+    {
+      "id": "planning/hexagonal-nut",
+      "kind": "planning",
+      "title": "Hexagonal Nut",
+      "priority": 95,
+      "triggers": ["hex nut", "hexagonal nut", "threaded nut", "hexagonal threaded insert", "六角螺母", "六角螺帽", "螺纹螺母"],
+      "exclude": ["bolt", "screw", "wing nut", "cap nut", "flange nut", "螺栓", "螺钉", "蝶形螺母", "法兰螺母"],
+      "bridge": "bridge/planning-hexagonal-nut.md",
+      "source": "source/planning/hexagonal-nut.planning.md",
+      "capability_translation_rules": ["approximated: thread_geometry_omitted"],
+      "related": ["functional/axisymmetric-revolve-strategy", "functional/standard-hole-wizard", "atomic/extrude-base-profile", "atomic/coaxial-bore-rule", "atomic/threaded-hole-creation", "atomic/fillet-chamfer-last"]
+    },
+
+    {"id": "functional/axisymmetric-revolve-strategy", "kind": "functional", "title": "Axisymmetric Revolve", "priority": 80, "triggers": ["axisymmetric", "revolve", "revolved body", "rotational part", "turned part", "回转体", "轴对称", "车削件"], "exclude": ["simple extruded cylinder", "rectangular plate"], "bridge": "bridge/functional-axisymmetric-revolve.md", "source": "source/functional/axisymmetric-revolve-strategy.functional.md", "capability_translation_rules": ["exact: explicit_revolve_axis"], "related": []},
+    {"id": "functional/bearing-bore-seat", "kind": "functional", "title": "Bearing Bore Seat", "priority": 79, "triggers": ["bearing bore", "bearing pocket", "bearing seat", "bushing bore", "shaft clearance bore", "轴承孔", "轴承座孔", "轴承腔", "轴间隙孔"], "exclude": [], "bridge": "bridge/functional-bearing-bore-seat.md", "source": "source/functional/bearing-bore-seat.functional.md", "capability_translation_rules": ["blocked: selector_required_for_dependent_features"], "related": ["atomic/coaxial-bore-rule", "atomic/counterbored-hole-creation"]},
+    {"id": "functional/flange-bolt-circle", "kind": "functional", "title": "Flange Bolt Circle", "priority": 78, "triggers": ["flange bolt circle", "bolt circle", "pitch circle", "pcd", "circular bolt pattern", "螺栓圆", "节圆", "圆周孔阵列"], "exclude": ["rectangular hole grid", "矩形孔阵列"], "bridge": "bridge/functional-flange-bolt-circle.md", "source": "source/functional/flange-bolt-circle.functional.md", "capability_translation_rules": ["expanded: circular_pattern_to_explicit_circles", "blocked: explicit_circle_layout_required"], "related": ["atomic/pattern-holes-from-datum"]},
+    {"id": "functional/mounting-plate-hole-layout", "kind": "functional", "title": "Mounting Plate Hole Layout", "priority": 77, "triggers": ["mounting plate hole layout", "base plate hole pattern", "rectangular hole grid", "symmetric mounting holes", "底板孔布局", "矩形孔阵列", "安装孔阵列"], "exclude": ["flange bolt circle", "bearing bore"], "bridge": "bridge/functional-mounting-plate-hole-layout.md", "source": "source/functional/mounting-plate-hole-layout.functional.md", "capability_translation_rules": ["exact: linear_or_mirror_pattern"], "related": ["atomic/pattern-holes-from-datum", "functional/symmetric-feature-layout"]},
+    {"id": "functional/slotted-adjustment-feature", "kind": "functional", "title": "Slotted Adjustment Feature", "priority": 76, "triggers": ["slot", "slotted hole", "adjustment slot", "elongated hole", "guide slot", "槽", "长圆槽", "调节槽", "导向槽"], "exclude": ["shaft keyway", "revolved groove", "轴键槽", "回转槽"], "bridge": "bridge/functional-slotted-adjustment.md", "source": "source/functional/slotted-adjustment-feature.functional.md", "capability_translation_rules": ["exact: obround_extrude_cut"], "related": []},
+    {"id": "functional/standard-hole-wizard", "kind": "functional", "title": "Standard Hole Wizard", "priority": 75, "triggers": ["hole wizard", "standard holes", "threaded holes", "counterbored holes", "countersunk holes", "tapped holes", "孔向导", "标准孔", "螺纹孔", "沉孔", "沉头孔"], "exclude": [], "bridge": "bridge/functional-standard-hole-wizard.md", "source": "source/functional/standard-hole-wizard.functional.md", "capability_translation_rules": ["approximated: thread_geometry_omitted", "exact: supported_hole_subtype"], "related": ["atomic/counterbored-hole-creation", "atomic/threaded-hole-creation", "atomic/through-hole-cut"]},
+    {"id": "functional/symmetric-feature-layout", "kind": "functional", "title": "Symmetric Feature Layout", "priority": 74, "triggers": ["symmetric holes", "mirror pattern", "symmetry", "mirrored features", "centerline layout", "对称孔", "镜像阵列", "对称布局", "中心线布局"], "exclude": [], "bridge": "bridge/functional-symmetric-layout.md", "source": "source/functional/symmetric-feature-layout.functional.md", "capability_translation_rules": ["exact: pattern_mirror_or_pattern_linear"], "related": []},
+
+    {"id": "atomic/coaxial-bore-rule", "kind": "atomic", "title": "Coaxial Bore", "priority": 60, "triggers": ["coaxial bore", "central bore", "concentric", "shaft clearance", "同轴孔", "中心孔", "同心", "轴间隙"], "exclude": [], "bridge": "bridge/atomic-coaxial-bore.md", "source": "source/atomic/coaxial-bore-rule.atomic.md", "capability_translation_rules": ["exact: explicit_axis_or_frame"], "related": []},
+    {"id": "atomic/counterbored-hole-creation", "kind": "atomic", "title": "Counterbored Hole", "priority": 59, "triggers": ["counterbored hole", "counterbore", "socket head screw", "cap screw", "recessed screw head", "沉孔", "内六角螺钉", "螺钉头沉孔"], "exclude": [], "bridge": "bridge/atomic-counterbore.md", "source": "source/atomic/counterbored-hole-creation.atomic.md", "capability_translation_rules": ["exact: hole_counterbore"], "related": []},
+    {"id": "atomic/extrude-base-profile", "kind": "atomic", "title": "Extrude Base Profile", "priority": 58, "triggers": ["extrude base profile", "extrude rectangle", "extrude circle", "base extrusion", "simple cylinder", "rectangular block", "基础拉伸", "矩形拉伸", "圆柱拉伸"], "exclude": [], "bridge": "bridge/atomic-extrude-base.md", "source": "source/atomic/extrude-base-profile.atomic.md", "capability_translation_rules": ["exact: extrude_add_blind"], "related": []},
+    {"id": "atomic/fillet-chamfer-last", "kind": "atomic", "title": "Fillet And Chamfer Last", "priority": 57, "triggers": ["fillet chamfer last", "edge treatment", "chamfered edges", "filleted edges", "最后倒角", "最后圆角", "边缘处理"], "exclude": [], "bridge": "bridge/atomic-fillet-chamfer-last.md", "source": "source/atomic/fillet-chamfer-last.atomic.md", "capability_translation_rules": ["omitted: selector_unavailable", "exact: unique_selector"], "related": []},
+    {"id": "atomic/pattern-holes-from-datum", "kind": "atomic", "title": "Pattern Holes From Datum", "priority": 56, "triggers": ["hole pattern", "pattern holes from datum", "repeated holes", "symmetric holes", "孔阵列", "重复孔", "基准孔阵列", "对称孔"], "exclude": [], "bridge": "bridge/atomic-pattern-holes.md", "source": "source/atomic/pattern-holes-from-datum.atomic.md", "capability_translation_rules": ["expanded: explicit_circle_layout", "exact: pattern_linear_or_pattern_mirror"], "related": []},
+    {"id": "atomic/revolve-profile-around-axis", "kind": "atomic", "title": "Revolve Profile Around Axis", "priority": 55, "triggers": ["revolve profile", "revolve around axis", "revolved cut", "axisymmetric profile", "截面回转", "绕轴回转", "回转切除"], "exclude": [], "bridge": "bridge/atomic-revolve-profile.md", "source": "source/atomic/revolve-profile-around-axis.atomic.md", "capability_translation_rules": ["exact: revolve_add_or_revolve_cut"], "related": []},
+    {"id": "atomic/threaded-hole-creation", "kind": "atomic", "title": "Threaded Hole", "priority": 54, "triggers": ["threaded hole", "tapped hole", "internal thread", "m3", "m4", "m5", "m6", "螺纹孔", "攻丝孔", "内螺纹"], "exclude": [], "bridge": "bridge/atomic-threaded-hole.md", "source": "source/atomic/threaded-hole-creation.atomic.md", "capability_translation_rules": ["approximated: thread_geometry_omitted"], "related": []},
+    {"id": "atomic/through-hole-cut", "kind": "atomic", "title": "Through Hole Cut", "priority": 53, "triggers": ["through hole", "clearance hole", "central hole", "circular opening", "cut through", "bore through", "通孔", "间隙孔", "贯穿孔", "切穿"], "exclude": [], "bridge": "bridge/atomic-through-hole.md", "source": "source/atomic/through-hole-cut.atomic.md", "capability_translation_rules": ["exact: through_hole_or_explicit_cut"], "related": []}
+  ]
+}
@@ -0,0 +1,83 @@
+# Coaxial Bore Atomic Skill
+
+## When to use
+
+- A model contains nested cylindrical features that must share one axis: bore, pocket, hub, sleeve, shaft clearance, bearing seat, pilot diameter, or counterbore.
+- The request mentions concentric, coaxial, central bore, shaft hole, bearing pocket, or flanged cylindrical geometry.
+
+## Do not use when
+
+- Circular holes are independent mounting holes on a plate face.
+- The circular features intentionally use different centers.
+- The shape is decorative and has no functional axis.
+
+## Recognition features
+
+- Central bore or shaft clearance through a rotational or support body.
+- Concentric circles in sketch evidence.
+- Cylindrical faces nested around one axis.
+- Bearing seat, flange hub, sleeve, bushing, washer, spacer, or shaft-like part.
+
+## Core invariants
+
+- Use one explicit construction axis or shared sketch origin for all central cylindrical features.
+- Distinguish each diameter by role: clearance, seat, counterbore, outer diameter, pilot, groove.
+- Cut through holes through all relevant material; cut seats and counterbores only to their functional depth.
+- Do not create separate sketches whose centers can drift.
+
+## Parameter roles
+
+- `axis` is the shared centerline.
+- `bore_diameter` controls the through opening.
+- `seat_diameter` controls bearing/pilot/counterbore fit.
+- `outer_diameter` controls surrounding material.
+- `depth` controls blind pocket, counterbore, or groove depth.
+- `lead_in_chamfer` controls assembly entry.
+
+## Construction sequence
+
+1. Define the shared axis using the sketch origin, construction line, or selected cylindrical face.
+2. Sketch concentric circles or a revolved profile from that axis.
+3. Cut the smallest through bore first when it establishes shaft clearance.
+4. Cut larger seats, pockets, or counterbores to controlled depth.
+5. Add grooves, chamfers, and fillets after the primary coaxial cuts are stable.
+
+## Common failures
+
+- Off-axis bore because each circle was sketched from a different center.
+- Confusing through bore diameter with bearing seat diameter.
+- Cutting the bearing pocket through all and deleting the shoulder.
+- Treating unrelated bolt holes as coaxial features.
+
+## Evidence summary
+
+- Current library evidence: 50 reviewed SCAD58 flange and bearing-seat models.
+- Latest run evidence: accepted insights for central bore alignment, concentric circles, bearing seats, flanges, washers, bushings, and axisymmetric bodies.
+- Frequent operations in the latest run: Cut, RevCut, Revolution, Extrusion of concentric circles, Chamfer.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `coaxial bore`
+- `central bore`
+- `concentric`
+- `shaft clearance`
+
+Secondary triggers:
+- `bearing seat`
+- `pilot bore`
+- `counterbore`
+- `hub`
+- `sleeve`
+
+Operation triggers:
+- `concentric sketch`
+- `cut through bore`
+- `counterbore to depth`
+- `revolved cut`
+
+Exclusions:
+- `random face holes`
+- `rectangular hole grid`
+- `offset holes`
@@ -0,0 +1,89 @@
+# Counterbored Hole Creation Atomic Skill
+
+## When to use
+
+- A fastener hole needs a cylindrical recess so a socket head, cap screw head, or flat seating surface sits flush or below the top face.
+- The request mentions counterbore, counterbored hole, socket head screw, cap screw, recessed screw head, or flat-bottom screw seat.
+
+## Do not use when
+
+- The screw head requires a conical countersink rather than a cylindrical counterbore.
+- The feature is a bearing pocket, large cylindrical recess, decorative ring, or simple through hole.
+- The part has no fastener-seat function.
+
+## Recognition features
+
+- Through hole plus larger coaxial shallow cylindrical recess.
+- HoleWzd evidence for counterbored screw holes.
+- Descriptions mention recessed screw heads, socket head screws, counterbore depth, or flush mounting.
+- Often appears on mounting plates, brackets, flanges, and covers.
+
+## Core invariants
+
+- Counterbore axis and through-hole axis are identical.
+- Counterbore diameter must be larger than through-hole diameter.
+- Counterbore depth must be enough for the screw head but not cut through the part unless requested.
+- Create the hole as one standard feature when possible to preserve fastener intent.
+- Pattern the complete counterbored hole feature when repeated.
+
+## Parameter roles
+
+- `through_hole_diameter` defines screw clearance.
+- `counterbore_diameter` defines head clearance.
+- `counterbore_depth` defines head seating depth.
+- `fastener_size` defines standard screw selection.
+- `placement_point` defines hole center.
+- `end_condition` defines through, blind, or up-to-next behavior.
+
+## Construction sequence
+
+1. Select the mounting face where the screw head sits.
+2. Place the hole center from datums or pattern references.
+3. Create a counterbored hole feature with through diameter, counterbore diameter, and counterbore depth.
+4. Confirm the counterbore opens on the correct face.
+5. Pattern or mirror the full counterbored hole feature if repeated.
+6. Add small entrance chamfers only after the counterbore is correct.
+
+## Common failures
+
+- Modeling only a shallow large circle without the through hole.
+- Reversing the counterbore to the wrong side of the part.
+- Making counterbore and through-hole diameters equal.
+- Using countersink geometry for a socket head screw.
+- Patterning only the through hole and forgetting the recess.
+
+## Evidence summary
+
+- Latest run evidence: 49 accepted atomic insights matched counterbored hole creation.
+- Strong repeated names include `create_counterbored_hole`, `use_hole_wizard_for_counterbored_holes`, and `create_counterbore_hole_for_socket_head_screw`.
+- Frequent operations in the latest run: HoleWzd, Cut, LinearPattern, MirrorPattern, Chamfer.
+- Source model examples: 020555, 028735, 031527, 079425, 080632, 086114, 096301, 144289, 146696, 174675, 202122, 211326, 217613, 225627, 227232.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `counterbored hole`
+- `counterbore`
+- `socket head screw`
+- `cap screw`
+- `recessed screw head`
+
+Secondary triggers:
+- `flush screw`
+- `counterbore depth`
+- `counterbore diameter`
+- `mounting hole`
+- `fastener seat`
+
+Operation triggers:
+- `hole wizard counterbore`
+- `cut counterbore`
+- `pattern counterbored hole`
+- `chamfer hole edge`
+
+Exclusions:
+- `countersink`
+- `bearing pocket`
+- `decorative ring`
+- `plain through hole`
@@ -0,0 +1,87 @@
+# Extrude Base Profile Atomic Skill
+
+## When to use
+
+- The first solid body is a simple prismatic shape made from a closed 2D profile: rectangle, rounded rectangle, circle, annulus, hexagon, or simple contour.
+- The part is a plate, block, simple cylinder, bracket base, washer blank, spacer blank, or nut body made by extrusion.
+
+## Do not use when
+
+- The primary body has multiple coaxial diameter steps better made by revolve.
+- The shape is freeform, lofted, swept, bent sheet metal, or surface-based.
+- The extrusion profile is open or ambiguous.
+
+## Recognition features
+
+- SolidWorks evidence such as Extrusion/Boss-Extrude after a single sketch.
+- STEP evidence dominated by planar faces for prismatic parts or cylindrical surfaces for simple cylinders.
+- Descriptions mention rectangular block, plate, simple cylinder, extruded profile, or uniform thickness.
+
+## Core invariants
+
+- Start from a fully closed, constrained sketch.
+- Extrude normal to the sketch plane by the intended thickness or length.
+- Use symmetric or mid-plane extrusion when the part should stay centered on a datum.
+- Keep the base body simple; add holes, pockets, bosses, slots, and edge treatments as later features.
+- Use concentric circles for annular extrusions such as washers or tubes.
+
+## Parameter roles
+
+- `profile_type` selects rectangle, circle, annulus, hexagon, or custom closed contour.
+- `length`, `width`, `radius`, `outer_radius`, `inner_radius`, and `across_flats` define the sketch.
+- `extrude_depth` or `thickness` defines the solid depth.
+- `extrude_direction` and `midplane` define placement relative to datums.
+
+## Construction sequence
+
+1. Select the reference plane or face for the base profile.
+2. Draw and constrain the closed profile.
+3. Apply dimensional constraints for width, length, radius, or diameter.
+4. Extrude the profile to the required depth.
+5. Keep the resulting body merged as the main solid unless separate bodies are explicitly requested.
+6. Add secondary cuts and edge treatments afterward.
+
+## Common failures
+
+- Using an open sketch for solid extrusion.
+- Combining holes and detailed cutouts into the first sketch when separate features would be clearer.
+- Using multiple separate extrusions for what should be one base body.
+- Extruding a stepped shaft when revolve would preserve axial intent better.
+
+## Evidence summary
+
+- Latest run evidence: 70 accepted atomic insights matched base extrusion from rectangular/circular profiles.
+- Strong repeated names include `extrude_rectangle`, `extrude_circle`, `extrude_rectangle_from_sketch`, `extrude_rectangular_profile`, and `extrude_circular_profile`.
+- Frequent operations in the latest run: Extrusion, Sketch, Cut, Chamfer.
+- Source model examples: 000166, 026303, 050972, 053267, 088851, 114800, 148444, 157630, 162045, 188147, 209994, 220726, 237160, 238926.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `extrude base profile`
+- `extrude rectangle`
+- `extrude circle`
+- `base extrusion`
+- `simple cylinder`
+- `rectangular block`
+
+Secondary triggers:
+- `plate blank`
+- `bracket base`
+- `washer blank`
+- `annular extrusion`
+- `uniform thickness`
+
+Operation triggers:
+- `sketch closed profile`
+- `boss extrude`
+- `extrude to thickness`
+- `midplane extrusion`
+
+Exclusions:
+- `stepped shaft`
+- `revolve profile`
+- `loft`
+- `sweep`
+- `sheet metal bend`
@@ -0,0 +1,82 @@
+# Fillet Chamfer Last Atomic Skill
+
+## When to use
+
+- A machined part needs edge breaks, deburring chamfers, assembly lead-ins, stress-relief fillets, or small finishing rounds.
+- The edge treatment is secondary to the main body, holes, pockets, slots, and bores.
+
+## Do not use when
+
+- The rounded or chamfered profile is the primary defining shape, such as an O-ring groove, cam surface, ergonomic shell, or turbine blade.
+- A sharp edge is explicitly required for sealing, locating, scraping, or mating.
+- The chamfer/fillet would remove critical wall thickness around a hole, shoulder, or thin rib.
+
+## Recognition features
+
+- SolidWorks feature evidence such as Chamfer, Fillet, radius values, or angle-distance chamfers.
+- STEP evidence with conical or toroidal surfaces near final edges.
+- Descriptions mentioning chamfered edges, rounded corners, smooth transitions, edge relief, assembly ease, or stress reduction.
+
+## Core invariants
+
+- Apply edge treatments after primary solids, holes, bores, pockets, slots, and patterns are stable.
+- Keep edge treatment small relative to nearby feature size and wall thickness.
+- Use chamfer for lead-in/deburring and fillet for stress relief or smooth load transition.
+- Select specific edges; do not blindly fillet or chamfer every edge.
+- Preserve functional shoulders, datum faces, seal lands, and fastener seats.
+
+## Parameter roles
+
+- `chamfer_distance` defines bevel size.
+- `chamfer_angle` defines bevel angle, often 45 degrees when not otherwise specified.
+- `fillet_radius` defines round size.
+- `edge_set` defines which edges receive treatment.
+- `minimum_wall_after_edge_treatment` protects small holes, ribs, and pockets.
+
+## Construction sequence
+
+1. Complete the main body and all functional cuts.
+2. Identify functional edges that need lead-in, deburring, stress relief, or handling safety.
+3. Apply chamfers to hole entrances, exposed outer edges, or insertion edges.
+4. Apply fillets to internal corners, web transitions, and load-bearing transitions.
+5. Verify that holes, slots, shoulders, and bearing seats remain intact.
+
+## Common failures
+
+- Adding large fillets early and causing later cuts or patterns to fail.
+- Chamfering a bearing shoulder, seal land, or datum face that should remain crisp.
+- Using one global fillet radius across tiny holes and large outer edges.
+- Treating decorative edge rounding as more important than functional geometry.
+
+## Evidence summary
+
+- Current library evidence: 58 reviewed SCAD58 machined parts with final chamfer/fillet operations.
+- Latest run evidence: high-frequency accepted insights for `chamfer_edges`, `chamfer_edges_for_safety`, `apply_chamfer_to_edges`, `apply_fillet_to_edges`, and stress-relief fillets.
+- Frequent operations in the latest run: Chamfer and Fillet after Extrusion, Cut, HoleWzd, Pattern, and Revolution.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `fillet chamfer last`
+- `edge treatment`
+- `chamfered edges`
+- `filleted edges`
+
+Secondary triggers:
+- `deburr`
+- `assembly lead in`
+- `stress relief`
+- `smooth transition`
+- `edge break`
+
+Operation triggers:
+- `chamfer`
+- `fillet`
+- `apply edge treatment after cuts`
+
+Exclusions:
+- `primary rounded profile`
+- `sharp datum edge`
+- `seal land`
+- `cam surface`
@@ -0,0 +1,86 @@
+# Pattern Holes From Datum Atomic Skill
+
+## When to use
+
+- A model has repeated holes or repeated cut features that should be controlled by pitch, angle, symmetry, or a construction datum.
+- The design intent is a hole row, hole grid, mirrored pair, circular bolt circle, or repeated mounting pattern.
+
+## Do not use when
+
+- There is only one custom non-repeated hole.
+- Holes are intentionally irregular or individually dimensioned.
+- The feature is decorative and not constrained by functional layout.
+
+## Recognition features
+
+- Multiple holes with equal spacing, equal angular spacing, or mirrored positions.
+- SolidWorks evidence such as LinearPattern, CircularPattern, MirrorPattern, or repeated HoleWzd features.
+- Datum clues such as centerlines, edge offsets, pitch dimensions, central axis, or symmetry planes.
+
+## Core invariants
+
+- Build one correct seed hole or seed cut feature first.
+- Constrain the seed from a datum: edge offset, centerline, pitch circle, or axis.
+- Pattern the feature/cut, not only sketch circles.
+- Choose pattern type from geometry: linear for rows/grids, circular for flange bolt circles, mirror for symmetric pairs.
+- Keep the pattern editable by count, pitch, angle, and axis rather than hard-coded coordinates.
+
+## Parameter roles
+
+- `seed_position` defines the first hole from the datum.
+- `pitch` defines linear spacing.
+- `count` defines number of repeated instances.
+- `pattern_direction` defines row/grid direction.
+- `pattern_axis` defines circular pattern axis.
+- `total_angle` is usually 360 degrees for full bolt circles.
+- `mirror_plane` defines symmetric duplication.
+
+## Construction sequence
+
+1. Define the datum: edge offset, centerline, symmetry plane, or central axis.
+2. Create and validate one seed hole or cut feature.
+3. Select linear, circular, or mirror pattern based on the part family and layout.
+4. Pattern the feature with explicit count and spacing/angle.
+5. Add shared counterbore/countersink/thread detail before patterning when all instances match.
+6. Verify clearance to edges, central bores, slots, and neighboring holes.
+
+## Common failures
+
+- Duplicating sketch circles without actual cuts.
+- Using linear pattern for a flange bolt circle.
+- Using circular pattern for rectangular plate holes.
+- Patterning counterbore circles without patterning the underlying through hole.
+- Missing the datum so later size changes break alignment.
+
+## Evidence summary
+
+- Current library evidence: 58 reviewed SCAD58 models with repeated hole patterns.
+- Latest run evidence: accepted insights for linear repeated holes, mirror symmetry, symmetric hole placement, circular bolt patterns, and datum-driven construction geometry.
+- Frequent operations in the latest run: HoleWzd, Cut, LinearPattern, MirrorPattern, CircularPattern.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `hole pattern`
+- `pattern holes from datum`
+- `repeated holes`
+- `symmetric holes`
+
+Secondary triggers:
+- `linear pattern`
+- `circular pattern`
+- `mirror pattern`
+- `bolt holes`
+- `hole grid`
+
+Operation triggers:
+- `pattern cut feature`
+- `linear pattern`
+- `circular pattern`
+- `mirror`
+
+Exclusions:
+- `single custom hole`
+- `decorative circles`
+- `irregular holes`
@@ -0,0 +1,87 @@
+# Revolve Profile Around Axis Atomic Skill
+
+## When to use
+
+- A single feature is created by revolving a 2D profile around an axis: stepped cylinder, shaft shoulder, sleeve, bushing, washer groove, nut blank, knob, or circular recess.
+- The feature has a rotational cross-section that is easier to define in side view.
+
+## Do not use when
+
+- A plain constant-diameter cylinder can be created more simply by extruding a circle.
+- The profile is open, crosses the axis incorrectly, or represents non-axisymmetric geometry.
+- The feature is a rectangular plate, bracket wall, or arbitrary cutout.
+
+## Recognition features
+
+- Revolution/Revolve/RevCut feature evidence.
+- Sketch contains an axis line or construction centerline.
+- Multiple coaxial cylindrical, conical, or toroidal surfaces are expected.
+- Profile controls axial steps, shoulders, tapers, grooves, or rounded transitions.
+
+## Core invariants
+
+- The revolve axis must be explicit and stable.
+- The profile must be closed for material-adding revolve.
+- Keep the profile on the correct side of the axis to avoid self-intersection.
+- Use 360 degrees for complete rotational solids unless a partial sector is requested.
+- Use revolved cut, not boss revolve, when removing a groove or internal recess.
+
+## Parameter roles
+
+- `axis` defines the rotation center.
+- `profile` defines the closed side-view outline.
+- `revolve_angle` defines full or partial rotation.
+- `diameter_steps`, `axial_lengths`, `groove_depth`, and `taper_angle` define shape.
+- `operation_type` selects add or cut.
+
+## Construction sequence
+
+1. Create a sketch on a plane that contains the desired axis.
+2. Draw a construction axis or select a stable centerline.
+3. Draw the closed profile for added material, or the removal profile for a revolved cut.
+4. Revolve the profile around the axis, usually 360 degrees.
+5. Validate that the result is one solid and all intended circular features are coaxial.
+6. Add later holes, flats, slots, patterns, chamfers, and fillets as separate features.
+
+## Common failures
+
+- Revolving around the wrong edge or temporary line.
+- Letting the sketch cross the axis and causing invalid geometry.
+- Making several extruded cylinders instead of a single coherent turned profile.
+- Using revolve for non-axisymmetric bracket or plate features.
+
+## Evidence summary
+
+- Latest run evidence: 81 accepted atomic insights matched revolve, revolved profile, or revolved cut operations.
+- Strong repeated names include `revolve_profile`, `create_revolved_cut`, `revolve_profile_around_axis`, and `revolved_cut_for_internal_thread`.
+- Frequent operations in the latest run: Revolution, RevCut, Sketch, Cut, Chamfer, Fillet.
+- Source model examples: 009934, 010137, 015133, 026624, 053895, 079633, 086237, 094412, 139073, 146478, 161210, 162241, 222550, 238044.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `revolve profile`
+- `revolve around axis`
+- `revolved cut`
+- `axisymmetric profile`
+
+Secondary triggers:
+- `shaft shoulder`
+- `turned groove`
+- `bushing`
+- `washer`
+- `nut blank`
+- `stepped diameter`
+
+Operation triggers:
+- `draw construction axis`
+- `revolve 360 degrees`
+- `revolved cut`
+- `sketch half profile`
+
+Exclusions:
+- `plain extruded cylinder`
+- `rectangular plate`
+- `bracket wall`
+- `loft`
@@ -0,0 +1,93 @@
+# Threaded Hole Creation Atomic Skill
+
+## When to use
+
+- A part needs an internal thread, tapped hole, threaded mounting hole, or screw hole with a specified metric/imperial size.
+- The request mentions M3, M4, M5, M6, M8, M10, tapped hole, threaded hole, or thread depth.
+
+## Do not use when
+
+- The feature is an external thread on a bolt, screw, or shaft.
+- The hole is only a smooth clearance hole.
+- The model should avoid thread geometry and only show a simple bore unless the prompt asks for thread detail.
+
+## Recognition features
+
+- SolidWorks evidence such as HoleWzd threaded hole or thread parameters.
+- Descriptions mention fastening, tapped holes, internal thread, or screw mounting.
+- Hole is located on a planar face, boss face, or shaft end face.
+
+## Core invariants
+
+- Use a standard threaded hole feature or thread callout when available.
+- Keep the threaded hole axis normal to the placement face unless angled threading is requested.
+- Separate tap drill diameter, nominal thread size, hole depth, and thread depth.
+- Keep enough wall material around the threaded hole.
+- Add lead-in chamfer after the thread/hole is placed.
+
+## Parameter roles
+
+- `thread_size` defines nominal size such as M3/M4/M5/M6/M8/M10.
+- `thread_pitch` defines fine/coarse pitch when specified.
+- `thread_depth` defines threaded length.
+- `hole_depth` defines blind hole depth if not through.
+- `placement_point` and `face_normal` define location and direction.
+- `lead_in_chamfer` defines assembly entry.
+
+## Construction sequence
+
+1. Select the planar face or end face for the threaded hole.
+2. Place the hole center from datums, centerlines, or axis references.
+3. Create the hole using a threaded HoleWzd/hole feature with size and depth.
+4. If the backend cannot model threads, create the correct pilot bore and preserve thread intent in naming/comments.
+5. Pattern or mirror the threaded hole feature when repeated.
+6. Add a small lead-in chamfer after the threaded feature is stable.
+
+## Common failures
+
+- Modeling a threaded hole as a plain through cylinder.
+- Creating external thread geometry on an internal hole.
+- Placing threaded holes too close to edges, slots, or pockets.
+- Forgetting blind depth or thread depth.
+- Adding visual helical threads that make the model heavy or fragile when a callout is enough.
+
+## Evidence summary
+
+- Latest run evidence: 87 accepted atomic insights matched threaded/tapped hole creation.
+- Strong repeated names include `create_threaded_hole_with_hole_wizard`, `create_threaded_hole`, `threaded_hole_placement`, and `use_hole_wizard_for_threaded_holes`.
+- Frequent operations in the latest run: HoleWzd, Cut, RevCut, Chamfer, Pattern.
+- Source model examples: 000924, 011524, 017151, 047238, 077661, 080683, 095520, 105855, 145389, 160434, 174675, 200790, 206894, 211326, 225767.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `threaded hole`
+- `tapped hole`
+- `internal thread`
+- `M3`
+- `M4`
+- `M5`
+- `M6`
+- `M8`
+- `M10`
+
+Secondary triggers:
+- `thread depth`
+- `tap drill`
+- `screw mounting`
+- `threaded boss`
+- `end threaded hole`
+
+Operation triggers:
+- `hole wizard threaded hole`
+- `create tapped hole`
+- `add thread callout`
+- `lead in chamfer`
+
+Exclusions:
+- `external thread`
+- `bolt`
+- `screw`
+- `clearance hole only`
+- `decorative helix`
@@ -0,0 +1,89 @@
+# Through Hole Cut Atomic Skill
+
+## When to use
+
+- A part needs a clean circular hole or bore that passes fully through a plate, block, bracket wall, flange, washer, spacer, or boss.
+- The request mentions through hole, clearance hole, central hole, circular opening, bore through, or cut through all.
+
+## Do not use when
+
+- The hole is threaded, counterbored, countersunk, or a bearing seat requiring special geometry.
+- The circular feature is a blind pocket, groove, decorative recess, or non-through relief.
+- The hole is part of a patterned bolt circle; combine with the pattern skill for repeated holes.
+
+## Recognition features
+
+- Circular sketch on a planar face followed by Cut-Extrude or HoleWzd through all.
+- Cylindrical internal face runs through the full thickness.
+- Used for clearance, alignment, lightening, shaft passage, or central opening.
+
+## Core invariants
+
+- Hole axis should be normal to the face or coaxial with the main part axis.
+- Use through-all end condition when the hole must pass through the entire body.
+- Keep hole diameter and placement explicit.
+- For central holes, use the part axis or centerline as the placement reference.
+- For repeated holes, make one seed through hole and pattern it.
+
+## Parameter roles
+
+- `hole_diameter` defines opening size.
+- `placement_point` defines center on the start face.
+- `axis` defines coaxial central placement when needed.
+- `end_condition` is usually through all.
+- `face` defines the start plane.
+
+## Construction sequence
+
+1. Select the face or reference plane where the hole starts.
+2. Place a circle center from datums, centerlines, or the main axis.
+3. Sketch the circle with the required diameter.
+4. Cut through all material in the intended direction.
+5. Pattern or mirror the through-hole cut if repeated.
+6. Add hole edge chamfers only after the cut exists.
+
+## Common failures
+
+- Creating a shallow blind pocket when a through hole is required.
+- Leaving a sketch circle without cutting material.
+- Placing a central hole off-axis.
+- Treating threaded/counterbored/bearing holes as plain through holes.
+- Cutting through unintended bodies in an assembly-like model.
+
+## Evidence summary
+
+- Latest run evidence: 49 accepted atomic insights matched through-hole and circular-cut creation.
+- Strong repeated names include `create_through_hole`, `cut_circular_hole`, `cut_circle`, `cut_central_bore_through_plate`, and `create_through_holes_with_cut`.
+- Frequent operations in the latest run: Cut, HoleWzd, CircularPattern, LinearPattern, Chamfer.
+- Source model examples: 001563, 001942, 046907, 054633, 059866, 080145, 086131, 096474, 142955, 148675, 153729, 160077, 222192, 230562, 241179.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `through hole`
+- `clearance hole`
+- `central hole`
+- `circular opening`
+- `cut through`
+- `bore through`
+
+Secondary triggers:
+- `shaft passage`
+- `alignment hole`
+- `lightening hole`
+- `hole through plate`
+- `hole through boss`
+
+Operation triggers:
+- `cut extrude through all`
+- `cut circle`
+- `hole wizard through hole`
+- `pattern through hole`
+
+Exclusions:
+- `threaded hole`
+- `counterbored hole`
+- `countersink`
+- `bearing seat`
+- `blind pocket`
@@ -0,0 +1,91 @@
+# Axisymmetric Revolve Strategy Functional Skill
+
+## When to use
+
+- A part or major feature is rotationally symmetric around an axis: shaft, stepped shaft, flange hub, bushing, washer, spacer, sleeve, pulley-like blank, turned knob, or nut blank.
+- The profile contains steps, shoulders, grooves, tapers, spherical/rounded transitions, or coaxial bores that are easier to define in a half-section.
+
+## Do not use when
+
+- The body is a simple constant-diameter cylinder that can be created by one circle extrusion.
+- The part is primarily prismatic with only small cylindrical holes.
+- The geometry is freeform, non-axisymmetric, or has asymmetric lugs as the dominant feature.
+
+## Recognition features
+
+- Dominant central axis and circular cross-sections.
+- SolidWorks features such as Revolution, Revolve, RevCut, or revolved thread/groove cuts.
+- STEP evidence with multiple cylindrical, conical, or toroidal surfaces sharing an axis.
+- Functional roles include shafting, spacing, sealing, rotation, alignment, or fastening.
+
+## Core invariants
+
+- Sketch the axial cross-section on a plane that contains the rotation axis.
+- Keep the revolved profile on one side of the axis unless the CAD kernel expects a centerline profile.
+- Use one 360-degree revolve for the main axisymmetric body where possible.
+- Use revolved cuts for coaxial grooves, internal thread reliefs, and circular recesses.
+- Add asymmetric holes, flats, keyways, or bolt patterns after the revolved body is complete.
+
+## Parameter roles
+
+- `axis` defines the rotation centerline.
+- `profile_points` define the half-section outline.
+- `diameters` and `axial_lengths` define steps and shoulders.
+- `revolve_angle` is usually 360 degrees for a complete solid.
+- `groove_width`, `groove_depth`, `taper_angle`, and `fillet_radius` define turned details.
+
+## Construction sequence
+
+1. Define the central axis and an axial sketch plane.
+2. Draw the half-section profile with all major diameters, steps, shoulders, and bore boundaries.
+3. Revolve the closed profile 360 degrees to create the main body.
+4. Use revolved cuts for grooves, recesses, or thread reliefs that are also axisymmetric.
+5. Add non-axisymmetric secondary features such as flats, slots, keyways, or bolt holes.
+6. Apply chamfers and fillets at ends and shoulders last.
+
+## Common failures
+
+- Extruding several cylinders separately and leaving seams or separate bodies.
+- Revolving a profile that crosses the axis and creates invalid self-intersections.
+- Forgetting the construction axis or using an arbitrary edge as axis.
+- Adding asymmetric features before the revolve and making the base profile ambiguous.
+- Using revolve for a simple plain cylinder when extrusion is clearer.
+
+## Evidence summary
+
+- Latest run evidence: 105 accepted functional insights matched axisymmetric revolve and revolved-cut strategies.
+- Strong repeated names include `use_revolve_for_axisymmetric_parts`, `use_revolve_for_rotational_parts`, `use_revolve_for_axisymmetric_body`, and `use_revolution_for_axisymmetric_features`.
+- Frequent operations in the latest run: Revolution, RevCut, Cut, Chamfer, Fillet, HoleWzd.
+- Source model examples: 001563, 001957, 009934, 010137, 025245, 053895, 080683, 086232, 094412, 135604, 144887, 162241, 173716, 218803, 225038.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `axisymmetric`
+- `revolve`
+- `revolved body`
+- `rotational part`
+- `turned part`
+
+Secondary triggers:
+- `shaft`
+- `bushing`
+- `washer`
+- `sleeve`
+- `flange hub`
+- `stepped diameter`
+- `groove`
+
+Operation triggers:
+- `sketch half profile`
+- `revolve profile`
+- `revolved cut`
+- `define construction axis`
+- `chamfer shoulders`
+
+Exclusions:
+- `simple extruded cylinder`
+- `rectangular plate`
+- `mounting bracket`
+- `freeform surface`
@@ -0,0 +1,90 @@
+# Bearing Bore Seat Functional Skill
+
+## When to use
+
+- A part must locate a bearing, bushing, sleeve, or shaft using a coaxial bore, counterbore, pocket, shoulder, or retaining seat.
+- The requested model is a housing/seat component, bracketed bearing support, bushing support, or bearing retainer.
+
+## Do not use when
+
+- The part only has generic decorative holes or a simple washer hole.
+- The task is to create a full bearing assembly with rolling elements.
+- The central hole is only a screw clearance hole and not a shaft/bearing datum.
+
+## Recognition features
+
+- Through bore for shaft clearance.
+- Larger coaxial pocket for bearing outside diameter.
+- Shoulder or depth stop for axial location.
+- Optional retaining groove, cover recess, set-screw hole, lubrication hole, or mounting base.
+- Bore entry chamfers for assembly.
+
+## Core invariants
+
+- Shaft clearance bore and bearing seat remain coaxial.
+- Seat diameter is larger than shaft clearance diameter when a bearing pocket is present.
+- Seat depth must be represented; a bearing seat is not just a surface ring.
+- Shoulder geometry should remain after the pocket cut.
+- Mounting holes must not break into the bearing seat unless explicitly designed.
+
+## Parameter roles
+
+- `axis` defines the bore centerline.
+- `shaft_clearance_diameter` defines the through hole.
+- `bearing_outer_diameter` defines the pocket/seat diameter.
+- `seat_depth` defines bearing insertion depth.
+- `shoulder_diameter` and `shoulder_height` define axial stop.
+- `retaining_groove_width` and `retaining_groove_depth` define optional retention.
+
+## Construction sequence
+
+1. Create or select the main housing body.
+2. Establish a construction axis through the intended shaft centerline.
+3. Cut the shaft clearance bore through all relevant material.
+4. Cut the bearing seat/counterbore to controlled depth from the assembly side.
+5. Preserve or create the shoulder that stops the bearing.
+6. Add retaining grooves, set-screw holes, lubrication holes, and mounting holes only after the bore/seat is correct.
+7. Apply bore lead-in chamfers and small external fillets last.
+
+## Common failures
+
+- Making the seat blind depth ambiguous.
+- Losing the shoulder by cutting the same diameter through the whole body.
+- Off-axis bearing pocket relative to shaft bore.
+- Treating bearing housing as complete bearing assembly.
+- Adding mounting holes before the seat and accidentally breaking the pocket wall.
+
+## Evidence summary
+
+- Current library evidence: 24 reviewed SCAD58 bearing housing/seat models.
+- Latest run evidence: accepted insights for central bore alignment, coaxial cylindrical features, counterbore/seat construction, and bore chamfering.
+- Frequent operations in the latest run: Cut, RevCut, Revolution, HoleWzd, Chamfer, Fillet.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `bearing bore seat`
+- `bearing pocket`
+- `bearing seat`
+- `bushing bore`
+- `shaft clearance bore`
+
+Secondary triggers:
+- `coaxial bore`
+- `counterbore`
+- `shoulder`
+- `retaining groove`
+- `bearing housing`
+
+Operation triggers:
+- `cut through bore`
+- `counterbore to depth`
+- `preserve shoulder`
+- `chamfer bore`
+
+Exclusions:
+- `flange only`
+- `plain washer`
+- `decorative circular hole`
+- `complete rolling bearing`
@@ -0,0 +1,86 @@
+# Flange Bolt Circle Functional Skill
+
+## When to use
+
+- A flange, circular cover, annular ring, coupling, or flanged sleeve needs fastener holes evenly spaced around a central bore.
+- The request mentions bolt circle, pitch circle, PCD, evenly spaced flange holes, or circular pattern of screws.
+
+## Do not use when
+
+- Holes are in a rectangular grid, linear row, or mirrored pair on a plate or bracket.
+- The part has no central axis or central bore.
+- The holes are decorative circular cutouts rather than fastening holes.
+
+## Recognition features
+
+- Central bore or hub defines the rotation axis.
+- Bolt holes lie on a pitch circle concentric with the bore.
+- Angular spacing is equal: `360 / bolt_count`.
+- Optional counterbores or countersinks remain concentric with each bolt hole.
+
+## Core invariants
+
+- Bolt-circle center, central bore, hub, and outer diameter share the same axis.
+- Create one correct seed hole with the correct diameter and seat type.
+- Circular-pattern the hole feature, not just sketch circles.
+- Keep bolt count, pitch-circle diameter, and start angle explicit.
+- Add counterbore/countersink to the seed hole before patterning when all holes share the same fastener type.
+
+## Parameter roles
+
+- `bolt_count` controls number of fastener holes.
+- `bolt_circle_diameter` or `pitch_circle_diameter` controls radial placement.
+- `bolt_hole_diameter` defines clearance or pilot size.
+- `start_angle` controls angular orientation relative to a datum.
+- `counterbore_diameter`, `counterbore_depth`, and `countersink_angle` define fastener seating.
+
+## Construction sequence
+
+1. Define the central axis from the flange bore or construction geometry.
+2. Place one seed hole center at radius `bolt_circle_diameter / 2`.
+3. Create the seed hole as a cut, HoleWzd hole, counterbore, or countersink according to the fastener.
+4. Use circular pattern around the central axis for `bolt_count` instances over 360 degrees.
+5. Verify that every patterned hole cuts through the flange and remains inside the outer diameter.
+6. Add final chamfers and fillets after the bolt pattern is complete.
+
+## Common failures
+
+- Manually placing each hole and producing uneven angular spacing.
+- Patterning a sketch without cutting material.
+- Using a linear array on a circular flange.
+- Choosing pitch circle too close to the bore or outer edge.
+- Forgetting counterbore/countersink depth for flush fasteners.
+
+## Evidence summary
+
+- Current library evidence: 45 reviewed SCAD58 flange-like models.
+- Latest run evidence: accepted atomic and functional insights for circular pattern bolt holes, central bore alignment, and axisymmetric flange bodies.
+- Frequent operations in the latest run: CircularPattern, HoleWzd, Cut, Revolution, Chamfer.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `flange bolt circle`
+- `bolt circle`
+- `pitch circle`
+- `PCD`
+- `circular bolt pattern`
+
+Secondary triggers:
+- `flange holes`
+- `evenly spaced holes`
+- `central bore`
+- `counterbored flange holes`
+
+Operation triggers:
+- `circular pattern`
+- `hole wizard`
+- `pattern cut feature`
+- `cut bolt holes`
+
+Exclusions:
+- `linear hole grid`
+- `mounting plate row`
+- `random holes`
+- `side tab holes`
@@ -0,0 +1,88 @@
+# Mounting Plate Hole Layout Functional Skill
+
+## When to use
+
+- A plate or base block needs holes, slots, counterbores, countersinks, or threaded holes positioned from datum edges or centerlines.
+- The layout is rectangular, row-based, symmetric, mirrored, or grid-like rather than circular around a flange axis.
+- The hole layout controls mounting, alignment, adjustment, or fastening.
+
+## Do not use when
+
+- Holes are evenly spaced around a circular bolt circle on a flange.
+- The holes are decorative, random, or not functionally related.
+- The main operation is a bearing bore or central shaft seat rather than a mounting-hole layout.
+
+## Recognition features
+
+- Flat planar top face or side face used as the hole placement plane.
+- Edge margins, centerline offsets, pitch values, or symmetric pairs.
+- Repeated hole groups, slots, threaded holes, clearance holes, counterbores, countersinks, or dowel holes.
+- SolidWorks evidence often appears as HoleWzd, Cut, LPattern, MirrorPattern, and Chamfer.
+
+## Core invariants
+
+- Define plate datums before hole placement.
+- Keep hole centers constrained to margins, pitch, and symmetry instead of free coordinates.
+- Select the hole type from fastening function, not from appearance.
+- Pattern the cut or hole feature after the seed feature is correct.
+- Preserve minimum material around holes and between holes.
+
+## Parameter roles
+
+- `datum_edge_x`, `datum_edge_y`, and `centerline` define references.
+- `edge_margin_x`, `edge_margin_y`, `pitch_x`, `pitch_y`, `row_count`, and `column_count` define repeated layouts.
+- `hole_diameter`, `thread_size`, `fit`, and `end_condition` define the hole itself.
+- `counterbore_diameter`, `counterbore_depth`, `countersink_angle`, and `slot_length` define fastener seating or adjustability.
+
+## Construction sequence
+
+1. Select the plate face and define construction centerlines or edge-offset dimensions.
+2. Create one seed hole or one seed hole group using HoleWzd or a through cut.
+3. Use linear pattern for rows/grids and mirror for symmetric pairs.
+4. Use slots when the design requires adjustment rather than fixed bolt location.
+5. Add counterbore, countersink, or thread data to the seed hole before patterning where possible.
+6. Add chamfers and deburring features after the functional holes are complete.
+
+## Common failures
+
+- Converting counterbored/threaded/countersunk holes into plain cylinders.
+- Patterning sketch circles instead of the actual cut or hole feature.
+- Mixing flange bolt-circle logic into rectangular plate layouts.
+- Missing datum margins, causing holes to float.
+- Placing slots too close to edges or other holes.
+
+## Evidence summary
+
+- Current library evidence: 207 reviewed SCAD58 plate-like models.
+- Latest run evidence: high-frequency accepted insights for hole wizard use, standard hole types, symmetric hole placement, linear hole patterns, mirror patterns, slots, and edge chamfers.
+- Frequent operations in the latest run: HoleWzd, Cut, LinearPattern, MirrorPattern, Chamfer.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `mounting plate hole layout`
+- `base plate hole pattern`
+- `rectangular hole grid`
+- `symmetric mounting holes`
+
+Secondary triggers:
+- `edge margin`
+- `linear pitch`
+- `counterbored holes`
+- `threaded holes`
+- `slots`
+- `dowel holes`
+
+Operation triggers:
+- `hole wizard`
+- `linear pattern`
+- `mirror holes`
+- `cut through holes`
+- `counterbore`
+- `countersink`
+
+Exclusions:
+- `flange bolt circle`
+- `bearing bore`
+- `random decorative holes`
@@ -0,0 +1,87 @@
+# Slotted Adjustment Feature Functional Skill
+
+## When to use
+
+- A plate, bracket, clamp, guide, or mounting part needs an elongated slot for positional adjustment, clearance, sliding, or alignment.
+- The request mentions slot, slotted hole, adjustment slot, elongated hole, guide slot, keyway-like slot, or obround cutout.
+
+## Do not use when
+
+- The feature is a simple round hole with no adjustment function.
+- The slot is actually a shaft keyway or turned groove; use a shaft/keyway-specific rule if available.
+- The slot is decorative and not tied to fastening, travel, or clearance.
+
+## Recognition features
+
+- Elongated hole with two semicircular ends and straight sides.
+- Slot located on a flat plate/bracket face or through a wall.
+- Often paired, mirrored, or patterned.
+- Can coexist with counterbored holes, threaded holes, ribs, or edge chamfers.
+
+## Core invariants
+
+- Slot width should match the fastener/shaft clearance role.
+- Slot length defines adjustment travel and must be longer than the fastener diameter.
+- Keep end radii equal to half the slot width for manufacturable milled/slot features.
+- Dimension slots from datums and centerlines.
+- Cut slots after the base body exists and before final chamfers/fillets.
+
+## Parameter roles
+
+- `slot_width` defines cutter or fastener clearance.
+- `slot_length` defines adjustment range.
+- `end_radius` is usually `slot_width / 2`.
+- `slot_center`, `slot_angle`, and `edge_margin` locate the slot.
+- `slot_depth` or `through_all` defines end condition.
+
+## Construction sequence
+
+1. Select the planar face or reference plane where the slot starts.
+2. Sketch an obround slot from centerline, length, and width.
+3. Cut through all or to the required depth.
+4. Pattern or mirror the slot if repeated.
+5. Add small chamfers to slot edges after the cut is complete.
+
+## Common failures
+
+- Modeling a slot as a rectangle with sharp internal corners.
+- Making the slot length equal to the hole diameter, removing adjustment function.
+- Placing slots without enough wall material at the ends.
+- Confusing a bracket adjustment slot with a shaft keyway or revolved groove.
+
+## Evidence summary
+
+- Latest run evidence: 38 accepted functional insights matched slot, slotted adjustment, guide slot, or slot/cutout behavior.
+- Strong repeated names include `use_slots_for_adjustment`, `use_cut_extrude_for_holes_and_slots`, `central_slot_for_alignment`, and `cut_slots_for_adjustment`.
+- Frequent operations in the latest run: Cut, Extrusion, LinearPattern, MirrorPattern, Chamfer.
+- Source model examples: 004764, 005640, 006514, 011853, 026940, 043134, 058682, 096676, 106216, 156844, 163197, 185756, 199739, 213507, 240416.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `slot`
+- `slotted hole`
+- `adjustment slot`
+- `elongated hole`
+- `guide slot`
+
+Secondary triggers:
+- `obround`
+- `clearance slot`
+- `mounting adjustment`
+- `sliding`
+- `alignment slot`
+
+Operation triggers:
+- `sketch slot`
+- `cut extrude slot`
+- `mirror slot`
+- `linear pattern slot`
+- `chamfer slot edge`
+
+Exclusions:
+- `round hole only`
+- `shaft keyway`
+- `revolved groove`
+- `decorative cutout`
@@ -0,0 +1,92 @@
+# Standard Hole Wizard Functional Skill
+
+## When to use
+
+- A part needs standard clearance holes, threaded/tapped holes, counterbored holes, countersunk holes, dowel holes, or screw-seat holes.
+- The request mentions screw size, metric thread, socket head screw, flat head screw, fastener clearance, tapping, counterbore, countersink, or Hole Wizard-like behavior.
+
+## Do not use when
+
+- The circular feature is a bearing bore, shaft bore, decorative opening, large window, or non-standard milled pocket.
+- The hole is part of a freeform surface where a standard hole feature cannot be cleanly placed.
+- The user asks for detailed thread geometry and the CAD backend cannot represent it reliably.
+
+## Recognition features
+
+- Feature evidence such as HoleWzd, threaded hole, counterbored hole, countersunk hole, through hole, or standard metric sizes like M3, M4, M5, M6, M8, M10.
+- Holes are used for fastening, alignment, or assembly rather than decoration.
+- Hole positions are points on a planar face, often patterned or mirrored.
+
+## Core invariants
+
+- Select hole type before modeling: clearance, threaded, counterbore, countersink, or dowel.
+- Keep hole axis normal to the placement face unless an angled hole is explicitly requested.
+- Specify end condition: through all, blind depth, up to next, or thread depth.
+- Preserve fastener seating geometry: counterbore/countersink is not a decorative ring.
+- Pattern or mirror the completed hole feature when identical holes repeat.
+
+## Parameter roles
+
+- `hole_type` selects clearance, threaded, counterbore, countersink, dowel, or simple through hole.
+- `standard` and `thread_size` define metric/imperial thread family when available.
+- `hole_diameter`, `tap_drill_diameter`, `thread_depth`, and `hole_depth` define cut size.
+- `counterbore_diameter`, `counterbore_depth`, and `countersink_angle` define screw head seating.
+- `placement_points`, `edge_offsets`, and `pattern_count` define layout.
+
+## Construction sequence
+
+1. Identify the fastening or alignment function for each hole group.
+2. Choose the matching standard hole type and size.
+3. Place hole center points on the correct face using datums, centerlines, or coordinates.
+4. Create the hole feature with diameter, depth, thread, and seating data.
+5. Pattern or mirror the completed hole feature when the group repeats.
+6. Add entrance chamfers only after the hole geometry is correct.
+
+## Common failures
+
+- Modeling all holes as plain cylinders and losing thread/counterbore/countersink meaning.
+- Adding visual thread helixes where a thread callout or standard threaded hole is enough.
+- Forgetting counterbore depth for socket head screws.
+- Patterning hole center sketches without patterning the hole cut.
+- Using non-standard sizes when the prompt specifies standard fasteners.
+
+## Evidence summary
+
+- Latest run evidence: 149 accepted functional insights matched standard hole creation and fastener-hole logic.
+- Strong repeated names include `use_hole_wizard_for_standard_holes`, `use_counterbored_holes_for_flat_head_screws`, `use_hole_wizard_for_threaded_holes`, and `use_hole_wizard_for_counterbore_holes`.
+- Frequent operations in the latest run: HoleWzd, Cut, LinearPattern, MirrorPattern, Chamfer.
+- Source model examples: 001082, 001607, 003846, 011721, 014040, 029487, 041650, 061936, 074693, 094929, 102841, 145389, 160434, 211326, 227986.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `hole wizard`
+- `standard holes`
+- `threaded holes`
+- `counterbored holes`
+- `countersunk holes`
+- `tapped holes`
+
+Secondary triggers:
+- `M3`
+- `M4`
+- `M5`
+- `M6`
+- `M8`
+- `socket head screw`
+- `flat head screw`
+
+Operation triggers:
+- `create hole wizard feature`
+- `create threaded hole`
+- `create counterbore`
+- `create countersink`
+- `pattern hole feature`
+
+Exclusions:
+- `bearing bore`
+- `shaft bore`
+- `decorative hole`
+- `large cutout`
+- `freeform pocket`
@@ -0,0 +1,85 @@
+# Symmetric Feature Layout Functional Skill
+
+## When to use
+
+- A part has holes, cutouts, bosses, tabs, ribs, or slots arranged symmetrically about a centerline, midplane, or axis.
+- The prompt mentions symmetric holes, mirrored features, balanced mounting, centered layout, equal offsets, or left/right duplicates.
+
+## Do not use when
+
+- Features are intentionally asymmetric for clearance, indexing, handedness, or mating orientation.
+- The only symmetry is the natural circular symmetry of a plain shaft or washer with no repeated secondary features.
+- The model requires unique hand-placed features with different sizes.
+
+## Recognition features
+
+- Hole pairs, mirrored slots, duplicated bosses, matching tabs, or opposite-side cutouts.
+- SolidWorks features such as MirrorPattern or sketches with construction centerlines.
+- Descriptions mention symmetry, balanced fastening, alignment, centered holes, or mirrored geometry.
+
+## Core invariants
+
+- Define the symmetry plane, centerline, or axis before placing the seed feature.
+- Model one side or one quadrant carefully, then mirror/pattern it.
+- Keep symmetric features tied to the same dimensions so edits preserve balance.
+- Do not mirror features that are explicitly handed or direction-specific.
+- Combine with hole-type rules when mirrored features are fastener holes.
+
+## Parameter roles
+
+- `symmetry_plane` or `centerline` defines the mirror reference.
+- `seed_feature` defines the original hole, slot, boss, or cutout.
+- `offset_from_center`, `edge_margin`, and `pitch` define placement.
+- `mirror_count`, `pattern_count`, and `quadrant_count` define repetition intent.
+
+## Construction sequence
+
+1. Identify the natural datum: plate centerline, bracket midplane, flange axis, or body midplane.
+2. Create construction geometry for the symmetry reference.
+3. Build the seed feature on one side with full dimensions.
+4. Mirror or pattern the completed feature across the reference.
+5. Verify that all mirrored features remain inside material and keep correct hole type/depth.
+6. Apply common edge treatments after mirrored features are complete.
+
+## Common failures
+
+- Manually placing mirrored holes and getting unequal offsets.
+- Mirroring asymmetric features such as countersinks that should face a specific side.
+- Losing thread/counterbore data during mirror or pattern.
+- Creating a visually symmetric model with unconstrained feature positions.
+
+## Evidence summary
+
+- Latest run evidence: 228 accepted functional insights contained symmetry, mirror, centerline, or pattern alignment signals.
+- Strong repeated names include `use_mirror_pattern_for_symmetry`, `position_holes_symmetrically`, `symmetrical_hole_placement`, and `use_mirror_for_symmetry`.
+- Frequent operations in the latest run: MirrorPattern, LinearPattern, HoleWzd, Cut, construction lines, Chamfer.
+- Source model examples: 000124, 002620, 008006, 012598, 029447, 032081, 059866, 097101, 125932, 134012, 145543, 154893, 166339, 173306, 202020.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `symmetric holes`
+- `mirror pattern`
+- `symmetry`
+- `mirrored features`
+- `centerline layout`
+
+Secondary triggers:
+- `balanced mounting`
+- `equal offsets`
+- `left right holes`
+- `construction line`
+- `midplane`
+
+Operation triggers:
+- `create construction centerline`
+- `mirror feature`
+- `pattern symmetric holes`
+- `use equal constraints`
+
+Exclusions:
+- `asymmetric clearance`
+- `handed part`
+- `unique holes`
+- `plain cylinder only`
@@ -0,0 +1,98 @@
+# Bearing Housing Or Seat Planning Skill
+
+## When to use
+
+- The request describes a bearing housing, bearing seat, bearing support, bearing block, pillow-block-like support, bushing seat, shaft support, or retainer body.
+- The central functional feature is a precise coaxial bore, pocket, sleeve, shoulder, or counterbore that locates a bearing or bushing.
+- The part is a single machined component that supports a shaft or bearing, not the rolling bearing assembly itself.
+
+## Do not use when
+
+- The user asks for a complete bearing with balls, rollers, cage, inner race, and outer race.
+- The bearing word is only speculative and there is no bore, seat, sleeve, pocket, or retaining geometry.
+- The part is mainly a flange, washer, simple tube, or rectangular plate with unrelated holes.
+- The task requires an assembly of shaft, bearing, seals, fasteners, and housing together.
+
+## Recognition features
+
+- Coaxial shaft clearance bore through the body.
+- Larger bearing pocket or counterbore with controlled depth.
+- Shoulder, step, retaining lip, snap-ring groove, or cover seat to locate the bearing axially.
+- Mounting base, side lugs, flange, bolt holes, ribs, or bosses can appear, but they support the bearing axis rather than define the part family.
+- Chamfers at bore entrances and seat edges guide assembly.
+
+## Core invariants
+
+- Bearing seat diameter, shaft clearance diameter, housing outside diameter, and cover features share one axis.
+- Separate the bearing outer-diameter seat from the shaft clearance bore; they are not the same feature.
+- Leave a shoulder or defined depth when the bearing must stop axially.
+- Build enough housing material before cutting the bearing pocket.
+- Add mounting holes and ribs after the main bore/seat relationship is established.
+- Do not model balls or rollers unless the prompt explicitly asks for a bearing assembly.
+
+## Parameter roles
+
+- `bearing_outer_diameter` defines the pocket or seat diameter.
+- `shaft_clearance_diameter` defines the through bore.
+- `seat_depth` defines how far the bearing is inserted.
+- `shoulder_height` or `shoulder_diameter` defines axial retention.
+- `housing_wall_thickness` controls material around the bearing pocket.
+- `mounting_hole_pattern`, `base_length`, `base_width`, and `base_thickness` define attachment to the frame.
+- `rib_thickness` and `rib_height` define optional support ribs.
+
+## Construction sequence
+
+1. Define the bearing axis and choose the housing form: block, flanged seat, sleeve, pedestal, or bracketed support.
+2. Create the main housing/body with enough wall thickness around the bearing axis.
+3. Cut the through shaft clearance bore on the main axis.
+4. Cut the bearing pocket/counterbore to its seat depth, leaving a clear shoulder where needed.
+5. Add retaining grooves, cover recesses, set-screw holes, oil holes, or alignment features only if requested.
+6. Add base mounting holes, bolt pads, ribs, and bosses using datum-driven positions.
+7. Finish with bore lead-in chamfers, outside chamfers, and small fillets.
+
+## Common failures
+
+- Generating a bearing assembly instead of a housing or seat part.
+- Making the bearing seat and shaft clearance the same diameter.
+- Missing the shoulder/depth that locates the bearing.
+- Off-axis mounting of bore, pocket, or outer sleeve.
+- Turning every bearing support into a flange even when the evidence suggests a block or pedestal.
+- Adding decorative ribs or fasteners that obscure the bearing pocket.
+
+## Evidence summary
+
+- Current library evidence: 24 previously reviewed SCAD58 bearing housing/seat descriptions.
+- Latest run evidence: accepted insights for central bore alignment, bearing/bushing-like cylindrical seats, coaxial features, counterbores, mounting holes, and chamfered bore entries.
+- Frequent operations in the latest run: Extrusion, Revolution, Cut, RevCut, HoleWzd, Chamfer, Fillet.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `bearing housing`
+- `bearing seat`
+- `bearing support`
+- `bearing block`
+- `bushing seat`
+
+Secondary triggers:
+- `bearing bore`
+- `bearing pocket`
+- `shaft clearance`
+- `retaining shoulder`
+- `coaxial seat`
+- `pillow block`
+
+Operation triggers:
+- `cut coaxial bore`
+- `counterbore bearing seat`
+- `create shoulder`
+- `add mounting base holes`
+- `chamfer bore entry`
+
+Exclusions:
+- `complete rolling bearing`
+- `plain washer`
+- `flange only`
+- `simple tube`
+- `shaft only`
@@ -0,0 +1,93 @@
+# Flange Planning Skill
+
+## When to use
+
+- The request describes a circular flange, coupling flange, pipe flange, gasket-like flange, flanged sleeve, or flanged cylindrical adapter.
+- The part has a central axis, central bore, and fastener holes arranged around a pitch circle.
+- The flange connects, spaces, seals, or mounts coaxial parts such as shafts, pipes, bearings, covers, or couplings.
+
+## Do not use when
+
+- The word flange only means a side tab, flat ear, or rectangular mounting plate extension.
+- The hole layout is a rectangular grid, edge row, or arbitrary plate pattern.
+- The model is primarily a plain shaft, washer, pulley, bearing assembly, or bracket without a true circular flange body.
+
+## Recognition features
+
+- Axisymmetric disc, annular ring, raised hub, sleeve, stepped boss, or cylindrical landing surface.
+- Central through bore, pilot bore, counterbore, recess, seal land, or shaft clearance on the main axis.
+- Bolt holes are evenly spaced by angle around the same center as the bore.
+- Optional recesses, gasket grooves, chamfers, fillets, or counterbores are secondary to the coaxial flange body.
+
+## Core invariants
+
+- The outer diameter, bore, hub, sleeve, recesses, and bolt circle share one central construction axis.
+- Build the rotational body before cutting the bolt holes.
+- Define bolt-circle diameter separately from outer diameter and bore diameter.
+- Create one correct bolt hole, then circular-pattern the cut feature over 360 degrees.
+- Do not replace the bolt circle with a rectangular hole grid.
+- Keep fillets, chamfers, and cosmetic edge breaks late in the sequence.
+
+## Parameter roles
+
+- `outer_diameter` defines the flange envelope.
+- `thickness` defines the disc or flange plate depth.
+- `bore_diameter` defines shaft or pipe clearance.
+- `hub_diameter`, `hub_height`, and `pilot_diameter` define raised coaxial features.
+- `bolt_circle_diameter`, `bolt_count`, `bolt_hole_diameter`, and `start_angle` define the fastener pattern.
+- `counterbore_diameter`, `counterbore_depth`, `gasket_groove_width`, and `gasket_groove_depth` define secondary seats.
+
+## Construction sequence
+
+1. Establish the central axis and primary reference plane.
+2. Create the flange disc and any coaxial hub or sleeve using revolve for stepped profiles, or extrude circles for simple flat discs.
+3. Cut the central bore through the flange and hub on the same axis.
+4. Add one bolt hole at the pitch radius using the correct fastener hole type.
+5. Circular-pattern that cut around the central axis with equal angular spacing.
+6. Add recesses, gasket grooves, counterbores, chamfers, and fillets after the bore and bolt pattern are stable.
+
+## Common failures
+
+- Off-axis bore relative to hub or outer diameter.
+- Manual bolt hole placement that produces unequal angular spacing.
+- Confusing a rectangular mounting plate with a flange because both have multiple holes.
+- Forgetting the central bore and creating only a circular plate with holes.
+- Applying large fillets before the bolt pattern and causing feature failure.
+
+## Evidence summary
+
+- Current library evidence: 45 previously reviewed SCAD58 flange-like models.
+- Latest run evidence: accepted insights for circular flange bolt holes, circular pattern around a central bore, revolved axisymmetric bodies, and coaxial cylindrical features.
+- Frequent operations in the latest run: Revolution, Extrusion, Cut, HoleWzd, CircularPattern, Chamfer, Fillet.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `flange`
+- `circular flange`
+- `pipe flange`
+- `coupling flange`
+- `flanged sleeve`
+
+Secondary triggers:
+- `bolt circle`
+- `pitch circle`
+- `central bore`
+- `raised hub`
+- `gasket groove`
+- `pilot diameter`
+
+Operation triggers:
+- `revolve profile`
+- `extrude circular disc`
+- `cut central bore`
+- `circular pattern`
+- `counterbore bolt holes`
+
+Exclusions:
+- `mounting plate`
+- `rectangular hole grid`
+- `side tab`
+- `plain shaft`
+- `complete bearing`
@@ -0,0 +1,91 @@
+# Hexagonal Nut Planning Skill
+
+## When to use
+
+- The request describes a hex nut, hexagonal nut, machined nut, nut-like fastener, or hexagonal threaded insert.
+- The key features are wrench flats, a central threaded bore, and chamfered faces/edges.
+
+## Do not use when
+
+- The part is a bolt, screw, socket head cap screw, threaded rod, wing nut, cap nut, or flange nut unless the prompt explicitly asks for that variant.
+- The hexagon is only a decorative grip on another part.
+- The threaded feature is external rather than an internal bore.
+
+## Recognition features
+
+- Six flat wrench faces or hexagonal prism envelope.
+- Central internal threaded hole coaxial with the nut thickness.
+- Chamfers on top and bottom openings and on hex edges.
+- Optional counterbore, lead-in chamfer, or relieved thread entry.
+
+## Core invariants
+
+- Keep the threaded bore centered through the hex body.
+- Preserve the hex across-flats size separately from thread size and thickness.
+- Model chamfers as functional lead-ins and edge breaks, not as random bevels.
+- Represent internal thread intent using a threaded hole, thread callout, or helical/revolved cut only when required by output format.
+- Do not generate the mating bolt unless requested.
+
+## Parameter roles
+
+- `across_flats` defines wrench size.
+- `thickness` defines nut height.
+- `thread_size`, `thread_diameter`, and `thread_depth` define the central bore.
+- `bore_diameter` defines the pre-thread or clearance hole if thread geometry is abstracted.
+- `face_chamfer` and `edge_chamfer` define lead-in and deburring.
+
+## Construction sequence
+
+1. Create the hexagonal body as a hex extrusion or by cutting flats from a revolved/chamfered blank.
+2. Define the central axis through the nut.
+3. Create the central bore or threaded hole through the body.
+4. Add thread representation or thread callout if the CAD output supports it.
+5. Add top/bottom lead-in chamfers and small edge chamfers.
+6. Verify the hex flats remain planar and the bore remains coaxial.
+
+## Common failures
+
+- Producing a bolt or screw instead of a nut.
+- Forgetting the central threaded bore.
+- Placing the bore off-center relative to the hex body.
+- Making the chamfers so large that wrench flats disappear.
+- Treating a flange nut, cap nut, or wing nut as a plain hex nut.
+
+## Evidence summary
+
+- Latest run evidence: 25 accepted planning insights matched hex nut or nut-like threaded fastener descriptions.
+- Strong repeated names include `plan_hex_nut`, `revolved_hex_nut_with_internal_thread`, `hex_nut_construction`, and `plan_hexagonal_nut_with_threaded_bore`.
+- Frequent operations in the latest run: Revolution, Extrusion, Cut, RevCut, HoleWzd, Chamfer.
+- Source model examples: 009934, 010137, 052867, 066148, 067249, 135604, 138372, 150622, 200147, 204805, 222550, 225767, 231397, 238840.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `hex nut`
+- `hexagonal nut`
+- `nut`
+- `threaded nut`
+- `hexagonal threaded insert`
+
+Secondary triggers:
+- `internal thread`
+- `central threaded bore`
+- `wrench flats`
+- `across flats`
+- `chamfered nut`
+
+Operation triggers:
+- `extrude hexagon`
+- `cut central bore`
+- `hole wizard threaded hole`
+- `revolved cut thread`
+- `chamfer faces`
+
+Exclusions:
+- `bolt`
+- `screw`
+- `threaded shaft`
+- `wing nut`
+- `cap nut`
+- `flange nut`
@@ -0,0 +1,97 @@
+# Mounting Bracket Planning Skill
+
+## When to use
+
+- The request describes a mounting bracket, L bracket, U bracket, T bracket, support bracket, clamp bracket, lugged bracket, or machined support with holes.
+- The part has a load-bearing base plus one or more raised webs, tabs, arms, bosses, lugs, pockets, slots, or cutouts.
+- The model is a single machined bracket component, not an assembly with screws or attached hardware.
+
+## Do not use when
+
+- The part is only a flat plate with holes and no bracket-like 3D support structure.
+- The part is mainly a shaft, flange, bearing housing, complete hinge assembly, or sheet-metal bent bracket.
+- The prompt asks for a decorative stand or enclosure rather than a functional machined support.
+
+## Recognition features
+
+- Base block or plate that mounts to another part.
+- Vertical web, side wall, lug, tab, raised boss, or protruding arm.
+- Mounting holes, threaded holes, counterbores, slots, or cutouts.
+- Reinforcing ribs or fillets at transitions may appear when strength matters.
+- Hole placement is usually datum-driven and often symmetric or mirrored.
+
+## Core invariants
+
+- Build the main load path first: base, web/tab/lug, and boss geometry before small holes.
+- Keep bracket features as one coherent body unless the prompt explicitly asks for assembled parts.
+- Place holes from functional datums, not visual guesses.
+- Use standard hole features for threaded, counterbored, countersunk, and clearance holes.
+- Add cutouts/slots for clearance or adjustment only where they make functional sense.
+- Apply fillets/chamfers late, especially at web-to-base transitions and exposed edges.
+
+## Parameter roles
+
+- `base_length`, `base_width`, and `base_thickness` define the mounting base.
+- `web_height`, `web_thickness`, `tab_width`, `lug_radius`, and `boss_diameter` define support geometry.
+- `hole_diameter`, `thread_size`, `counterbore_diameter`, and `slot_length` define fastening and adjustment.
+- `edge_margin`, `hole_pitch`, `symmetry_plane`, and `boss_offset` define layout.
+- `fillet_radius` controls stress relief at transitions.
+
+## Construction sequence
+
+1. Create the base extrusion or main bracket profile.
+2. Add vertical webs, tabs, lugs, bosses, or arms as secondary extrusions from clear datum faces.
+3. Cut clearance pockets, U/L/T-shaped openings, slots, or lightening cutouts.
+4. Add standard holes using HoleWzd or cut features, positioned from datums and symmetry references.
+5. Pattern or mirror repeated holes/features when the design is symmetric.
+6. Add structural fillets at web/base intersections, then finish with small chamfers on exposed edges.
+
+## Common failures
+
+- Collapsing a bracket into a simple flat plate and losing the vertical/web structure.
+- Creating an assembly of screws, pins, or attached parts when only the bracket is requested.
+- Adding holes before the base/web geometry and producing floating or misaligned holes.
+- Mixing several unrelated bracket variants into one overloaded model.
+- Using decorative cutouts that weaken the load path or overlap holes.
+
+## Evidence summary
+
+- Latest run evidence: 247 accepted planning insights matched bracket-like descriptions and operations.
+- Strong repeated names include `plan_l_bracket_with_holes`, `bracket_with_holes_and_cutouts`, `bracket_with_holes_planning`, `mounting_bracket_with_holes`, and `plan_bracket_with_holes`.
+- Frequent operations in the latest run: Extrusion, Cut, HoleWzd, LinearPattern, MirrorPattern, Chamfer, Fillet, Boss.
+- Source model examples: 000780, 001607, 002620, 004421, 009414, 028735, 032081, 036242, 041396, 047048, 054507, 079425, 096301, 134801, 187546, 195869, 207737, 225658.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `mounting bracket`
+- `support bracket`
+- `L bracket`
+- `U bracket`
+- `T bracket`
+- `bracket with holes`
+
+Secondary triggers:
+- `web`
+- `lug`
+- `tab`
+- `boss`
+- `slot`
+- `cutout`
+- `threaded holes`
+
+Operation triggers:
+- `extrude base`
+- `extrude tab`
+- `cut slot`
+- `hole wizard`
+- `mirror pattern`
+- `fillet web transition`
+
+Exclusions:
+- `flat mounting plate only`
+- `flange`
+- `shaft`
+- `bearing assembly`
+- `sheet metal bend`
@@ -0,0 +1,97 @@
+# Mounting Plate Planning Skill
+
+## When to use
+
+- The request describes a flat mounting plate, base plate, adapter plate, panel, fixture plate, or spacer plate.
+- The dominant body is a prismatic plate with functional holes, slots, counterbores, countersinks, threaded holes, pockets, or a central clearance cutout.
+- The plate locates, fastens, spaces, or supports other components from planar datum faces.
+
+## Do not use when
+
+- The primary geometry is an axisymmetric flange with a circular bolt pitch pattern.
+- The plate is only a secondary base under a bearing housing, bracket, motor body, or cylindrical module.
+- The part is a true 3D bracket with vertical webs, lugs, arms, or side walls that control the design.
+- The request is for sheet-metal bends, formed panels, or decorative flat art rather than a machined plate.
+
+## Recognition features
+
+- Rectangular, square, rounded-rectangle, or simple profile plate with mostly uniform thickness.
+- Holes are located from datum edges, centerlines, or symmetric offsets instead of arbitrary visual placement.
+- Common hole types include clearance holes, threaded holes, counterbored holes, countersunk holes, dowel holes, and through holes.
+- Cutouts can be central circular holes, rectangular windows, slots, pockets, or weight-reduction openings.
+- Edge chamfers and small fillets are usually finishing operations, not the defining shape.
+
+## Core invariants
+
+- Establish the base plate envelope, thickness, top face, bottom face, and edge datum references before adding holes.
+- Keep mounting holes fully constrained by edge margins, centerlines, pitch, symmetry, or functional datums.
+- Model holes as real cuts or standard hole features; do not leave sketch circles on the face.
+- Use one seed hole or hole group plus pattern/mirror when the layout is regular.
+- Choose hole type from function: clearance for bolts, threaded/tapped for fastening into the plate, counterbore/countersink for flush screw heads, slot for adjustment.
+- Apply chamfers and fillets after functional holes and cutouts so edge treatment does not distort hole geometry.
+
+## Parameter roles
+
+- `length`, `width`, and `thickness` define the blank.
+- `corner_radius` or `corner_chamfer` controls perimeter treatment when requested.
+- `edge_margin_x`, `edge_margin_y`, `pitch_x`, and `pitch_y` locate rectangular hole groups.
+- `central_cutout_width`, `central_cutout_length`, or `central_bore_diameter` define clearance openings.
+- `hole_diameter`, `thread_size`, `counterbore_diameter`, `counterbore_depth`, `countersink_angle`, and `slot_length` define fastener features.
+
+## Construction sequence
+
+1. Create a constrained base sketch for the plate outline and extrude it to thickness.
+2. Define datum centerlines, edge offsets, and symmetry references on the main face.
+3. Add the central clearance hole, rectangular cutout, or pocket if it controls component clearance.
+4. Add the first functional hole using the correct hole type and end condition.
+5. Replicate regular hole groups with linear pattern, circular pattern, or mirror according to layout intent.
+6. Add slots, secondary pockets, bosses, or local relief cuts only after primary mounting references are stable.
+7. Finish with perimeter chamfers, small fillets, and deburring details.
+
+## Common failures
+
+- Treating every round mark as the same generic hole and losing counterbore/thread/countersink meaning.
+- Placing holes by eyeballing coordinates instead of datum margins and symmetry.
+- Using a flange bolt-circle pattern for a rectangular plate grid.
+- Adding chamfers before holes, causing holes or counterbores to be clipped.
+- Over-modeling decorative bevels while missing the functional fastening layout.
+- Combining unrelated bracket walls or cylindrical housings into the mounting plate body.
+
+## Evidence summary
+
+- Current library evidence: 207 previously reviewed SCAD58 mounting/base plate descriptions.
+- Latest run evidence: repeated accepted insights for `mounting_plate_with_holes`, `plan_mounting_plate_with_holes`, `extrude_rectangular_plate`, `base_plate_with_mounting_holes`, central cutouts, threaded holes, counterbored holes, linear patterns, and edge chamfers.
+- Frequent operations in the latest run: Extrusion, HoleWzd, Cut, LinearPattern, MirrorPattern, Chamfer, Fillet.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `mounting plate`
+- `base plate`
+- `adapter plate`
+- `fixture plate`
+- `flat plate with holes`
+
+Secondary triggers:
+- `hole grid`
+- `edge margins`
+- `counterbored holes`
+- `threaded holes`
+- `central cutout`
+- `slots`
+
+Operation triggers:
+- `extrude base plate`
+- `hole wizard`
+- `linear pattern`
+- `mirror holes`
+- `cut central opening`
+- `chamfer edges last`
+
+Exclusions:
+- `flange bolt circle`
+- `bearing housing`
+- `shaft`
+- `3d bracket`
+- `sheet metal bend`
@@ -0,0 +1,95 @@
+# Simple Shaft Or Cylindrical Rod Planning Skill
+
+## When to use
+
+- The request describes a single cylindrical rod, simple shaft, spacer rod, cylindrical pin, standoff-like cylinder, or shaft-like machined part.
+- The body is primarily a cylinder along one axis, optionally with end holes, chamfers, simple steps, flats, slots, or threaded holes.
+- The task is to generate one part, not a spindle cartridge or shaft assembly.
+
+## Do not use when
+
+- The request describes a spindle module, motor rotor assembly, gearbox shaft assembly, bearings, seals, pulleys, keys, and fasteners together.
+- The part is mainly a flange, washer, bushing, screw, bolt, or complex housing.
+- The body is a hollow tube or bearing sleeve where inner/outer diameter relationship is the main design intent.
+
+## Recognition features
+
+- Long cylindrical body with uniform or stepped diameters.
+- Central axis is the dominant datum.
+- Optional end chamfers, end fillets, centered threaded holes, transverse holes, flats, slots, grooves, or keyway-like cuts.
+- Turning and cylindrical surfaces dominate; milling may appear for flats, slots, or keyways.
+
+## Core invariants
+
+- Establish one main shaft axis and overall length first.
+- Use extrude for a uniform simple cylinder; use revolve for stepped diameters, grooves, shoulders, tapers, or turned profiles.
+- Keep all coaxial diameter changes, end holes, and grooves aligned to the shaft axis.
+- Treat holes, slots, flats, keyways, and threads as secondary features.
+- Do not invent bearings, couplings, gears, or housings unless requested.
+
+## Parameter roles
+
+- `length` defines the axial span.
+- `diameter` defines a simple rod.
+- `step_diameters`, `step_lengths`, `shoulder_positions`, and `groove_width` define turned features.
+- `end_hole_diameter`, `thread_size`, and `thread_depth` define centered end holes.
+- `flat_width`, `slot_width`, `slot_depth`, and `keyway_length` define milled secondary features.
+- `chamfer_distance` and `fillet_radius` define edge finishing.
+
+## Construction sequence
+
+1. Define the shaft axis and overall length.
+2. For a simple rod, sketch a circle and extrude along the axis.
+3. For stepped or shouldered shafts, sketch the half-profile and revolve it around the axis.
+4. Add centered end holes, threaded holes, grooves, flats, slots, or keyways as secondary cuts.
+5. Keep secondary features referenced to the shaft axis or end-face datums.
+6. Finish with end chamfers, shoulder fillets, and small edge breaks.
+
+## Common failures
+
+- Generating a spindle or bearing assembly when only a shaft/rod part was requested.
+- Creating off-axis end holes.
+- Using multiple separate bodies for diameter steps instead of one coherent solid.
+- Treating a threaded shaft, bolt, or screw as the same as a plain shaft without preserving thread/head differences.
+- Adding arbitrary decorative grooves that were not requested.
+
+## Evidence summary
+
+- Latest run evidence: 107 accepted planning insights matched shaft, rod, cylinder, and stepped-shaft construction.
+- Strong repeated names include `plan_stepped_shaft`, `simple_cylinder_extrusion`, `stepped_shaft_construction`, `cylindrical_rod_planning`, and `plan_revolve_shaft_profile`.
+- Frequent operations in the latest run: Extrusion, Revolution, Cut, RevCut, HoleWzd, Chamfer, Fillet.
+- Source model examples: 000166, 001957, 040325, 069352, 080683, 100698, 112997, 144199, 148300, 160726, 172872, 210853, 218803, 225038, 232675, 239358.
+- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
+
+## Retrieval metadata
+
+Triggers:
+- `cylindrical rod`
+- `simple shaft`
+- `shaft`
+- `rod`
+- `pin`
+- `standoff`
+
+Secondary triggers:
+- `stepped shaft`
+- `end hole`
+- `threaded end`
+- `shaft groove`
+- `keyway`
+- `chamfered ends`
+
+Operation triggers:
+- `extrude circle`
+- `revolve shaft profile`
+- `cut end hole`
+- `cut slot`
+- `chamfer ends`
+
+Exclusions:
+- `spindle assembly`
+- `bearing assembly`
+- `flange`
+- `washer`
+- `bolt head`
+- `gear`
@@ -127,6 +127,30 @@ async def read_task(task_id: str) -> JSONResponse:
    return JSONResponse(task)


+@app.get("/v1/tasks/{task_id}/design-intent")
+async def read_current_design_intent(task_id: str) -> JSONResponse:
+    try:
+        safe_id = safe_task_id(task_id)
+        result = store.read_design_intent(safe_id)
+    except ValueError as error:
+        raise HTTPException(status_code=400, detail=str(error)) from error
+    if result is None:
+        raise HTTPException(status_code=404, detail="No DesignIntent exists for this task")
+    return JSONResponse({"task_id": safe_id, "intent_id": result["record"]["intent_id"], **result})
+
+
+@app.get("/v1/tasks/{task_id}/design-intents/{intent_id}")
+async def read_design_intent(task_id: str, intent_id: str) -> JSONResponse:
+    try:
+        safe_id = safe_task_id(task_id)
+        result = store.read_design_intent(safe_id, intent_id)
+    except ValueError as error:
+        raise HTTPException(status_code=400, detail=str(error)) from error
+    if result is None:
+        raise HTTPException(status_code=404, detail="DesignIntent not found")
+    return JSONResponse({"task_id": safe_id, "intent_id": result["record"]["intent_id"], **result})
+
+
@app.get("/v1/tasks/{task_id}/artifacts/{artifact_path:path}")
 async def read_artifact(task_id: str, artifact_path: str) -> StreamingResponse:
    from fastapi.responses import FileResponse
@@ -165,6 +189,10 @@ async def update_parameters(task_id: str, payload: ParameterUpdate) -> JSONRespo
        safe_id = safe_task_id(task_id)
        task = store.read_task(safe_id)
        current_revision_id = str((task or {}).get("current_revision") or "")
+        current_revision = next(
+            (item for item in (task or {}).get("revisions", []) if item.get("revision_id") == current_revision_id),
+            {},
+        )
        current_path = store.current_cdsl_path(safe_id)
        if not task or not current_path or not current_revision_id:
            raise ValueError("Task has no successful CDSL revision")
@@ -179,6 +207,11 @@ async def update_parameters(task_id: str, payload: ParameterUpdate) -> JSONRespo
            summary="Updated CDSL parameters",
            parent_revision_id=current_revision_id,
            operation={"type": "parameter_update", "values": payload.values},
+            part_skills=None,
+            generation_assumptions=[],
+            design_intent_id=str(current_revision.get("design_intent_id") or ""),
+            design_intent_path=str(current_revision.get("design_intent_path") or ""),
+            design_intent_status="accepted" if current_revision.get("design_intent_id") else "",
        )
        return JSONResponse(result)
    except ValueError as error:
@@ -57,6 +57,8 @@ class CadResult(BaseModel):
    parameters_path: str | None = None
    selector_path: str | None = None
    edges_path: str | None = None
+    design_intent_id: str | None = None
+    design_intent_path: str | None = None
    summary: str
    reference_ids: list[str] = Field(default_factory=list)
    engine: str = "cdsl_only"
@@ -15,6 +15,7 @@ import httpx
 from app.models.contracts import ChatMessage
 from app.services.engine_service import build_revision, load_engine, validate_cdsl
 from app.services.library import CdslLibrary
+from app.services.part_skills import PartSkillLibrary
 from app.services.sse import event
 from app.services.storage import WorkspaceStore, now_iso
 from app.settings import ProviderConfig, ProviderModel, Settings
@@ -141,12 +142,25 @@ def invalid_cdsl_result(error: ValueError) -> dict[str, Any]:
    }


+def invalid_design_intent_result(error: Exception) -> dict[str, Any]:
+    code = str(getattr(error, "code", "INVALID_DESIGN_INTENT"))
+    return {
+        "ok": False,
+        "code": code,
+        "message": f"The DesignIntent plan was rejected: {error}. Correct the complete plan before generating CDSL.",
+    }
+
+
 def user_visible_tool_message(result: dict[str, Any], user_text: str) -> str:
    code = str(result.get("code") or "")
    if code == "INVALID_CDSL":
        if any("\u4e00" <= char <= "\u9fff" for char in str(user_text or "")):
            return "CDSL 不符合 engine 的模型契约，正在请求模型按 schema 修正后重新生成。"
        return "The CDSL model does not match the engine contract. Asking the model to correct it and retry."
+    if code in {"INVALID_DESIGN_INTENT", "INTENT_CDSL_MISMATCH", "DESIGN_INTENT_REQUIRED", "DESIGN_INTENT_BLOCKED"}:
+        if any("\u4e00" <= char <= "\u9fff" for char in str(user_text or "")):
+            return "设计意图尚未通过校验，未进入 CAD 构建。"
+        return "The design intent has not passed validation, so CAD construction has not started."
    return str(result.get("message") or result.get("summary") or "")


@@ -187,6 +201,22 @@ def _cdsl_tool_schema() -> dict[str, Any]:
 CDSL_TOOL_SCHEMA = _cdsl_tool_schema()


+def _design_intent_tool_schema() -> dict[str, Any]:
+    engine_dir = Path(__file__).resolve().parents[2] / "engine" / "cdsl_engine"
+    try:
+        schema = json.loads((engine_dir / "design_intent_schema.json").read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError) as error:
+        raise RuntimeError("Local DesignIntent JSON Schema is unavailable or invalid") from error
+    # The model cannot forge storage/audit fields. They are added only after
+    # backend validation by WorkspaceStore.create_design_intent().
+    for field in ("intent_id", "created_at", "part_skill_ids", "part_skill_selection"):
+        schema.get("properties", {}).pop(field, None)
+    return schema
+
+
+DESIGN_INTENT_TOOL_SCHEMA = _design_intent_tool_schema()
+
+
 TOOL_SCHEMAS: list[dict[str, Any]] = [
    {
        "type": "function",
@@ -197,6 +227,7 @@ TOOL_SCHEMAS: list[dict[str, Any]] = [
                "type": "object",
                "properties": {"query": {"type": "string"}, "limit": {"type": "integer", "minimum": 1, "maximum": 8}},
                "required": ["query"],
+                "additionalProperties": False,
            },
        },
    },
@@ -205,7 +236,24 @@ TOOL_SCHEMAS: list[dict[str, Any]] = [
        "function": {
            "name": "read_cdsl_reference",
            "description": "Read one official CDSL sample by part_id. Use this before creating geometry based on a reference.",
-            "parameters": {"type": "object", "properties": {"part_id": {"type": "string"}}, "required": ["part_id"]},
+            "parameters": {"type": "object", "properties": {"part_id": {"type": "string"}}, "required": ["part_id"], "additionalProperties": False},
+        },
+    },
+    {
+        "type": "function",
+        "function": {
+            "name": "propose_design_intent",
+            "description": "Submit a complete semantic DesignIntent plan before searching CDSL references or generating CDSL.",
+            "parameters": {
+                "type": "object",
+                "properties": {
+                    "intent": DESIGN_INTENT_TOOL_SCHEMA,
+                    "summary": {"type": "string", "minLength": 1},
+                    "assumptions": {"type": "array", "items": {"type": "string"}},
+                },
+                "required": ["intent", "summary", "assumptions"],
+                "additionalProperties": False,
+            },
        },
    },
    {
@@ -224,11 +272,12 @@ TOOL_SCHEMAS: list[dict[str, Any]] = [
            "parameters": {
                "type": "object",
                "properties": {
+                    "design_intent_id": {"type": "string", "pattern": "^intent_[a-z0-9]{12}$"},
                    "cdsl": CDSL_TOOL_SCHEMA,
                    "summary": {"type": "string", "minLength": 1},
                    "assumptions": {"type": "array", "items": {"type": "string"}},
                },
-                "required": ["cdsl", "summary"],
+                "required": ["design_intent_id", "cdsl", "summary", "assumptions"],
                "additionalProperties": False,
            },
        },
@@ -242,13 +291,11 @@ def tools_for_model(model: ProviderModel) -> list[dict[str, Any]]:
    if not model.strict_tool_schema:
        return tools

-    generate_tool = next(
-        tool for tool in tools
-        if tool.get("function", {}).get("name") == "generate_cdsl_model"
-    )
-    # This flag constrains function arguments only. It has no effect on normal
-    # assistant text, the user's prompt, or the natural-language summary.
-    generate_tool["function"]["strict"] = True
+    for tool in tools:
+        if tool.get("function", {}).get("name") in {"propose_design_intent", "generate_cdsl_model"}:
+            # This flag constrains function arguments only. It has no effect on
+            # normal assistant text, the user's prompt, or the summary.
+            tool["function"]["strict"] = True
    return tools


@@ -352,9 +399,12 @@ def system_prompt(
    user_text: str,
    viewer_context: list[dict[str, Any]] | None = None,
    task_id: str = "",
+    part_skill_context: str = "",
 ) -> str:
    skill_path = settings.engine_root.parent.parent / "agent" / "skills" / "cad-engine" / "SKILL.md"
    skill = skill_path.read_text(encoding="utf-8") if skill_path.is_file() else ""
+    planning_recipe_path = skill_path.with_name("planning-recipe.md")
+    planning_recipe = planning_recipe_path.read_text(encoding="utf-8") if planning_recipe_path.is_file() else ""
    readme_path = settings.engine_root / "README.md"
    engine_readme = readme_path.read_text(encoding="utf-8") if readme_path.is_file() else ""
    profile_schema_path = settings.engine_root / "profile_schema.json"
@@ -379,6 +429,12 @@ Tool call contract:
 - Do not append prose, Markdown code fences, comments, or a second JSON value.
 - For generate_cdsl_model, pass the complete CDSL as the cdsl object directly,
  not as Markdown and not as a concatenated JSON string.
+- Call propose_design_intent first. Its `intent` is the complete semantic
+  planning JSON, without sketch coordinates, raw CAD code, storage IDs, or
+  part-skill IDs. The backend chooses and persists part skills itself.
+- Do not call search_cdsl_library, read_cdsl_reference, or
+  generate_cdsl_model until propose_design_intent returns an accepted
+  `intent_id`. Pass that exact ID to generate_cdsl_model.
 - The generate_cdsl_model `cdsl` parameter is the complete machine-enforced
  schema. Satisfy its nested object and array types exactly; do not substitute
  a shorthand array for an object. For example, every hole position is
@@ -399,12 +455,34 @@ Workflow limits:
 {response_language_instruction(user_text)}

 You generate parameterized CDSL, never raw CAD source code. For new CAD requests:
-1. Search the local official CDSL library.
-2. Read at least one relevant reference when a match exists.
-3. Call generate_cdsl_model only when the request is sufficiently specified.
-4. Never claim success unless the tool returns a successful CDSL-only STEP and GLB artifact.
+1. Use the injected part-skill guidance, when present, only to establish the
+   structural plan, feature dependency order, and parameter roles.
+2. Call propose_design_intent. A blocking question or capability gap must make
+   the plan `needs_clarification`; then ask one concise user-facing question
+   and do not call CDSL tools.
+3. Only after an accepted ready intent, search the local official CDSL library.
+   Read at least one relevant reference when a match exists; samples provide
+   schema-valid expressions, not higher-priority part intent.
+4. Generate a complete CDSL whose feature IDs, atomics, dependencies, profiles,
+   and selector evidence exactly realize the accepted DesignIntent, then call
+   generate_cdsl_model with its intent ID.
+5. Never claim success unless the tool returns a successful CDSL-only STEP and GLB artifact.

-For a revision, call read_current_cdsl first and preserve unrelated features.
+Precedence is strict: explicit user request, then CDSL schema/runtime, then
+part-skill guidance, then CDSL-library examples. Part skills never authorize
+build123d source, an unknown atomic/profile, an invented selector, or a free-
+coordinate substitute for a capability the runtime cannot express. For an
+unsupported requested structure, ask one concise clarification question or
+state the blocker rather than fabricating geometry. If a part-family conflict
+is injected, preserve the current part unless the user explicitly requests a
+whole-part replacement. A primary-family conflict is a hard clarification
+stop: ask one concise question and do not call generate_cdsl_model until the
+user resolves it.
+
+For a revision, call read_current_cdsl first and preserve unrelated features,
+then propose a revise DesignIntent with base_revision_id set to the current
+successful revision. Do not search references or generate CDSL before that plan
+is accepted.
 Do not output compiler_context, unknown_shape, complex_arc_shape, entities,
 contour_edges_mm, or contour_regions_mm. Use only self-contained named profiles
 and feature atomic IDs defined in the engine schema below. Read the engine
@@ -415,6 +493,9 @@ dimensions or intent are missing. Ordinary explanations must not create CAD.
 Local skill:
 {skill}

+DesignIntent planning recipe:
+{planning_recipe}
+
 Local engine guide:
 {engine_readme}

@@ -423,15 +504,29 @@ Authoritative engine schema:

 Supported named profile types:
 {supported_profiles}
+
+Injected part-skill context:
+{part_skill_context or "No part-family skill guidance was selected for this request."}
 {viewer_selection_prompt(viewer_context, task_id)}
 """


+def part_skill_root(settings: Settings) -> Path:
+    return settings.engine_root.parent.parent / "agent" / "skills" / "cad-engine" / "references" / "part-skills"
+
+
 class AgentService:
-    def __init__(self, settings: Settings, store: WorkspaceStore, library: CdslLibrary) -> None:
+    def __init__(
+        self,
+        settings: Settings,
+        store: WorkspaceStore,
+        library: CdslLibrary,
+        part_skill_library: PartSkillLibrary | None = None,
+    ) -> None:
        self.settings = settings
        self.store = store
        self.library = library
+        self.part_skill_library = part_skill_library or PartSkillLibrary(part_skill_root(settings))

    async def stream(
        self,
@@ -489,7 +584,29 @@ class AgentService:
        yield event("progress", {"step": "analyze_request", "label": "分析需求", "status": "running", "message": "正在整理当前会话和 CAD 需求。"})
        references: list[str] = []
        library_searches = 0
-        model_messages: list[dict[str, Any]] = [{"role": "system", "content": system_prompt(self.settings, user_text, viewer_context, task_id)}]
+        current_task = self.store.read_task(task_id) if task_id else None
+        inherited_skill_ids = self.part_skill_library.inherited_from_task(current_task)
+        part_skill_selection = self.part_skill_library.select(user_text, inherited_skill_ids)
+        intent_state: dict[str, Any] = {
+            "phase": "WAITING_FOR_INTENT",
+            "design_intent_id": "",
+        }
+        yield event("progress", {
+            "step": "select_part_skill",
+            "label": "识别零件族",
+            "status": "success",
+            "message": "已完成零件族与辅助建模规则识别。",
+        })
+        model_messages: list[dict[str, Any]] = [{
+            "role": "system",
+            "content": system_prompt(
+                self.settings,
+                user_text,
+                viewer_context,
+                task_id,
+                self.part_skill_library.render_context(part_skill_selection),
+            ),
+        }]
        model_messages.extend(messages_for_model(messages))
        if attachment_message:
            model_messages.append({"role": "user", "content": attachment_message})
@@ -591,14 +708,30 @@ class AgentService:
                        "message": "Agent 正在调用本地 CAD 工具。",
                    })
                    try:
-                        result, generated = await self._run_tool(name, arguments, task_id, user_text, references)
+                        result, generated = await self._run_tool(
+                            name,
+                            arguments,
+                            task_id,
+                            user_text,
+                            references,
+                            part_skill_selection=part_skill_selection,
+                            intent_state=intent_state,
+                        )
                    except (ValueError, RuntimeError) as error:
-                        if name == "generate_cdsl_model":
+                        code = str(getattr(error, "code", ""))
+                        if code in {"INVALID_DESIGN_INTENT", "INTENT_CDSL_MISMATCH", "DESIGN_INTENT_REQUIRED", "DESIGN_INTENT_BLOCKED"}:
+                            result = invalid_design_intent_result(error)
+                            generated = None
+                            if name in {"propose_design_intent", "generate_cdsl_model"} and code != "DESIGN_INTENT_BLOCKED":
+                                required_tool_name = name
+                        elif name == "generate_cdsl_model":
                            result = invalid_cdsl_result(error)
                            generated = None
                            required_tool_name = name
                        else:
                            raise
+                    if result.get("task_id"):
+                        task_id = str(result["task_id"])
                    if generated:
                        task_id = generated["task_id"]
                    model_messages.append({
@@ -612,7 +745,14 @@ class AgentService:
                        "status": "success" if result.get("ok", True) else "error",
                        "message": user_visible_tool_message(result, user_text),
                    })
-                    if name == "generate_cdsl_model" and result.get("ok"):
+                    if name == "propose_design_intent" and result.get("ok"):
+                        yield event("progress", {
+                            "step": "validate_design_intent",
+                            "label": "校验设计意图",
+                            "status": "success",
+                            "message": "设计意图已通过结构、依赖和能力边界校验。",
+                        })
+                    if name in {"propose_design_intent", "generate_cdsl_model"} and result.get("ok"):
                        required_tool_name = None
                    if generated:
                        result_payload = {
@@ -625,6 +765,8 @@ class AgentService:
                            "parametersPath": generated.get("parameters_path"),
                            "selectorPath": generated.get("selector_path"),
                            "edgesPath": generated.get("edges_path"),
+                            "designIntentId": generated.get("design_intent_id"),
+                            "designIntentPath": generated.get("design_intent_path"),
                            "summary": generated["summary"],
                            "referenceIds": generated["reference_ids"],
                            "engine": generated["engine"],
@@ -632,6 +774,12 @@ class AgentService:
                        successful_result = result_payload
                        assistant_parts.append({"type": "data-cad-result", "data": result_payload})
                        yield event("cad_result", result_payload)
+                        yield event("progress", {
+                            "step": "build_cad",
+                            "label": "构建 CAD",
+                            "status": "success",
+                            "message": "已通过 cdsl_only runtime 构建 STEP 和 GLB。",
+                        })
                if iteration == 7:
                    error_payload = {"stage": "agent", "message": "Agent tool loop reached its safety limit."}
                    assistant_parts.append({"type": "data-cad-error", "data": error_payload})
@@ -749,15 +897,87 @@ class AgentService:
            raise RuntimeError(f"LLM request failed ({response.status_code}): {response.text[:800]}")
        return response.json()

-    async def _run_tool(self, name: str, arguments: dict[str, Any], task_id: str, request: str, references: list[str]) -> tuple[dict[str, Any], dict[str, Any] | None]:
+    async def _run_tool(
+        self,
+        name: str,
+        arguments: dict[str, Any],
+        task_id: str,
+        request: str,
+        references: list[str],
+        *,
+        part_skill_selection: dict[str, Any] | None = None,
+        intent_state: dict[str, Any] | None = None,
+    ) -> tuple[dict[str, Any], dict[str, Any] | None]:
+        state = intent_state if intent_state is not None else {"phase": "WAITING_FOR_INTENT", "design_intent_id": ""}
+        phase = str(state.get("phase") or "WAITING_FOR_INTENT")
+        if name == "propose_design_intent":
+            intent = arguments.get("intent")
+            if not isinstance(intent, dict):
+                raise ValueError("propose_design_intent requires an intent JSON object")
+            if any(field in intent for field in ("intent_id", "created_at", "part_skill_ids", "part_skill_selection")):
+                raise ValueError("DesignIntent audit fields are assigned only by the backend")
+            summary = str(arguments.get("summary") or "").strip()
+            assumptions = arguments.get("assumptions")
+            if not summary or not isinstance(assumptions, list) or not all(isinstance(item, str) for item in assumptions):
+                raise ValueError("propose_design_intent requires a summary and an array of string assumptions")
+            selection = part_skill_selection or self.part_skill_library.select(request)
+            if selection.get("conflict"):
+                return {
+                    "ok": False,
+                    "code": "DESIGN_INTENT_BLOCKED",
+                    "message": str(selection["conflict"].get("message") or "The current part family must be clarified before planning."),
+                }, None
+            engine = load_engine(self.settings)
+            current_task = self.store.read_task(task_id) if task_id else None
+            current_revision_id = str((current_task or {}).get("current_revision") or "")
+            if current_revision_id and intent.get("mode") != "revise":
+                raise engine.DesignIntentError("INVALID_DESIGN_INTENT", "A task with a successful revision requires a revise DesignIntent")
+            if intent.get("mode") == "revise" and not current_revision_id:
+                raise engine.DesignIntentError("INVALID_DESIGN_INTENT", "A revise DesignIntent requires a current successful revision")
+            normalized = deepcopy(intent)
+            if assumptions:
+                normalized["assumptions"] = list(dict.fromkeys([
+                    *normalized.get("assumptions", []),
+                    *(item.strip() for item in assumptions if item.strip()),
+                ]))
+            normalized = engine.validate_design_intent(normalized, engine, current_revision_id=current_revision_id)
+            persisted = self.store.create_design_intent(task_id or None, request, normalized, selection)
+            state["design_intent_id"] = persisted["intent_id"]
+            if normalized["status"] != "ready":
+                state["phase"] = "WAITING_FOR_INTENT"
+                return {
+                    "ok": False,
+                    "code": "DESIGN_INTENT_BLOCKED",
+                    "task_id": persisted["task_id"],
+                    "design_intent_id": persisted["intent_id"],
+                    "status": normalized["status"],
+                    "intent": persisted["intent"],
+                    "message": "The DesignIntent is saved but blocked. Ask the user only about its blocking question or capability gap.",
+                }, None
+            state["phase"] = "INTENT_ACCEPTED"
+            return {
+                "ok": True,
+                "task_id": persisted["task_id"],
+                "design_intent_id": persisted["intent_id"],
+                "design_intent_path": persisted["path"],
+                "status": "accepted",
+                "intent": persisted["intent"],
+                "summary": summary,
+            }, None
        if name == "search_cdsl_library":
+            if phase not in {"INTENT_ACCEPTED", "LIBRARY_REFERENCE", "WAITING_FOR_CDSL"}:
+                return {"ok": False, "code": "DESIGN_INTENT_REQUIRED", "message": "Submit and receive an accepted DesignIntent before searching CDSL references."}, None
            results = self.library.search(str(arguments.get("query") or request), int(arguments.get("limit") or 5))
+            state["phase"] = "LIBRARY_REFERENCE"
            return {"ok": True, "results": results}, None
        if name == "read_cdsl_reference":
+            if phase not in {"INTENT_ACCEPTED", "LIBRARY_REFERENCE", "WAITING_FOR_CDSL"}:
+                return {"ok": False, "code": "DESIGN_INTENT_REQUIRED", "message": "Submit and receive an accepted DesignIntent before reading CDSL references."}, None
            part_id = str(arguments.get("part_id") or "")
            sample = self.library.read_sample(part_id)
            if part_id not in references:
                references.append(part_id)
+            state["phase"] = "WAITING_FOR_CDSL"
            return {"ok": True, "part_id": part_id, "cdsl": sample}, None
        if name == "read_current_cdsl":
            if not task_id:
@@ -767,6 +987,17 @@ class AgentService:
                return {"ok": False, "message": "The current task has no successful CDSL revision."}, None
            return {"ok": True, "task_id": task_id, "cdsl": json.loads(path.read_text(encoding="utf-8"))}, None
        if name == "generate_cdsl_model":
+            if phase not in {"INTENT_ACCEPTED", "LIBRARY_REFERENCE", "WAITING_FOR_CDSL"}:
+                return {"ok": False, "code": "DESIGN_INTENT_REQUIRED", "message": "Submit and receive an accepted DesignIntent before generating CDSL."}, None
+            design_intent_id = str(arguments.get("design_intent_id") or "")
+            if not design_intent_id or design_intent_id != str(state.get("design_intent_id") or "") or not task_id:
+                return {"ok": False, "code": "DESIGN_INTENT_REQUIRED", "message": "generate_cdsl_model must use the accepted DesignIntent ID for this task."}, None
+            intent_record = self.store.read_design_intent(task_id, design_intent_id)
+            if not intent_record or intent_record["record"].get("status") != "accepted":
+                return {"ok": False, "code": "DESIGN_INTENT_REQUIRED", "message": "The requested DesignIntent is not accepted for this task."}, None
+            intent = intent_record["intent"]
+            if intent.get("status") != "ready":
+                return {"ok": False, "code": "DESIGN_INTENT_BLOCKED", "message": "The DesignIntent is blocked and cannot be built."}, None
            cdsl = arguments.get("cdsl")
            if isinstance(cdsl, str):
                cdsl = json.loads(cdsl)
@@ -775,19 +1006,47 @@ class AgentService:
            # Reject malformed model output before build_revision allocates a task
            # directory or revision. build_revision will assign the real task ID.
            preflight_cdsl = {**cdsl, "part_id": str(cdsl.get("part_id") or "agent_preflight")}
-            validate_cdsl(preflight_cdsl, load_engine(self.settings))
+            engine = load_engine(self.settings)
+            current_path = self.store.current_cdsl_path(task_id)
+            current_cdsl = json.loads(current_path.read_text(encoding="utf-8")) if current_path else None
+            engine.validate_intent_cdsl(intent, preflight_cdsl, engine, current_cdsl=current_cdsl)
+            validate_cdsl(preflight_cdsl, engine)
            summary = str(arguments.get("summary") or "CDSL CAD model")
-            yieldable = await asyncio.to_thread(
-                build_revision,
-                settings=self.settings,
-                store=self.store,
-                task_id=task_id or None,
-                request=request,
-                cdsl=cdsl,
-                reference_ids=list(references),
-                summary=summary,
-            )
-            return {"ok": True, "summary": summary, "task_id": yieldable["task_id"], "revision_id": yieldable["revision_id"]}, yieldable
+            raw_assumptions = arguments.get("assumptions") or []
+            if not isinstance(raw_assumptions, list) or not all(isinstance(item, str) for item in raw_assumptions):
+                raise ValueError("generate_cdsl_model assumptions must be an array of strings")
+            assumptions = [item.strip() for item in raw_assumptions if item.strip()]
+            selection = part_skill_selection or self.part_skill_library.select(request)
+            part_skill_audit = self.part_skill_library.audit(selection, cdsl, assumptions)
+            state["phase"] = "BUILDING"
+            try:
+                yieldable = await asyncio.to_thread(
+                    build_revision,
+                    settings=self.settings,
+                    store=self.store,
+                    task_id=task_id or None,
+                    request=request,
+                    cdsl=cdsl,
+                    reference_ids=list(references),
+                    summary=summary,
+                    part_skills=part_skill_audit,
+                    generation_assumptions=assumptions,
+                    design_intent=intent,
+                    design_intent_path=str(intent_record["record"].get("path") or ""),
+                )
+            except Exception:
+                # The accepted plan stays current so the model can submit a
+                # corrected implementation without silently replanning.
+                state["phase"] = "INTENT_ACCEPTED"
+                raise
+            state["phase"] = "COMPLETED"
+            return {
+                "ok": True,
+                "summary": summary,
+                "task_id": yieldable["task_id"],
+                "revision_id": yieldable["revision_id"],
+                "design_intent_id": design_intent_id,
+            }, yieldable
        raise ValueError(f"Unknown agent tool: {name}")

    @staticmethod
@@ -800,7 +1059,8 @@ class AgentService:
            "search_cdsl_library": "检索 CDSL 模型库",
            "read_cdsl_reference": "读取 CDSL 参考模型",
            "read_current_cdsl": "读取当前 CDSL",
-            "generate_cdsl_model": "生成 CDSL CAD 模型",
+            "propose_design_intent": "生成设计意图",
+            "generate_cdsl_model": "生成 CDSL",
        }.get(name, "调用 CAD 工具")

    def _attachment_message(self, conversation: dict[str, Any], model: ProviderModel) -> list[dict[str, Any]] | str:
@@ -147,6 +147,10 @@ def apply_direct_edit(
    revision_id = str((task or {}).get("current_revision") or "")
    if source is None or not revision_id:
        raise ValueError("Task has no successful CDSL revision")
+    current_revision = next(
+        (item for item in (task or {}).get("revisions", []) if item.get("revision_id") == revision_id),
+        {},
+    )
    frame = _selection_frame(selection)
    cdsl = copy.deepcopy(json.loads(source.read_text(encoding="utf-8")))
    features = cdsl.setdefault("features", [])
@@ -184,4 +188,9 @@ def apply_direct_edit(
        summary=f"Applied {operation}",
        parent_revision_id=revision_id,
        operation={"type": operation, "selection": selection, "parameters": parameters},
+        part_skills=None,
+        generation_assumptions=[],
+        design_intent_id=str(current_revision.get("design_intent_id") or ""),
+        design_intent_path=str(current_revision.get("design_intent_path") or ""),
+        design_intent_status="accepted" if current_revision.get("design_intent_id") else "",
    )
@@ -319,6 +319,68 @@ def apply_parameter_updates(cdsl: dict[str, Any], values: dict[str, float]) -> t
    return updated, parameter_contract(updated)


+def _part_skill_audit(
+    part_skills: dict[str, Any] | None,
+    request: str,
+    generation_assumptions: list[str] | None,
+) -> dict[str, Any]:
+    """Normalize the planning audit persisted beside a product revision."""
+    audit = copy.deepcopy(part_skills) if isinstance(part_skills, dict) else {}
+    skills = [item for item in audit.get("skills") or [] if isinstance(item, dict)]
+    skill_ids = [str(item) for item in audit.get("skill_ids") or [] if str(item)]
+    if not skill_ids:
+        skill_ids = [str(item.get("id")) for item in skills if item.get("id")]
+    evidence = audit.get("evidence") if isinstance(audit.get("evidence"), dict) else {}
+    audit.update({
+        "schema_version": str(audit.get("schema_version") or "1.0"),
+        "request": str(audit.get("request") or request),
+        "structural_intent": str(audit.get("structural_intent") or request),
+        "skill_ids": skill_ids,
+        "skills": skills,
+        "inherited_skill_ids": [str(item) for item in audit.get("inherited_skill_ids") or [] if str(item)],
+        "assumptions": [str(item) for item in generation_assumptions or []],
+        "evidence": evidence,
+        "capability_translations": [
+            item for item in audit.get("capability_translations") or [] if isinstance(item, dict)
+        ],
+    })
+    return audit
+
+
+def _generation_context(
+    reference_ids: list[str],
+    part_skill_audit: dict[str, Any],
+    design_intent: dict[str, Any] | None = None,
+    design_intent_path: str = "",
+    design_intent_id: str = "",
+) -> dict[str, Any]:
+    skills = [item for item in part_skill_audit.get("skills") or [] if isinstance(item, dict)]
+    intent = design_intent if isinstance(design_intent, dict) else {}
+    return {
+        "design_intent_id": str(intent.get("intent_id") or design_intent_id or ""),
+        "design_intent_path": design_intent_path,
+        "design_intent_structures": [
+            str(item.get("id") or "")
+            for item in intent.get("structures") or []
+            if isinstance(item, dict) and item.get("id")
+        ],
+        "cdsl_reference_ids": list(reference_ids),
+        "part_skill_ids": list(part_skill_audit.get("skill_ids") or []),
+        "part_skill_paths": [
+            {
+                "id": str(item.get("id") or ""),
+                "bridge": str(item.get("bridge") or ""),
+                "source": str(item.get("source") or ""),
+            }
+            for item in skills
+        ],
+        "generation_assumptions": list(part_skill_audit.get("assumptions") or []),
+        "design_intent_assumptions": list(part_skill_audit.get("design_intent_assumptions") or []),
+        "design_intent_capability_gaps": list(part_skill_audit.get("design_intent_capability_gaps") or []),
+        "capability_translations": list(part_skill_audit.get("capability_translations") or []),
+    }
+
+
 def build_revision(
    *,
    settings: Settings,
@@ -331,18 +393,16 @@ def build_revision(
    parent_revision_id: str | None = None,
    operation: dict[str, Any] | None = None,
    attachments: list[dict[str, Any]] | None = None,
+    part_skills: dict[str, Any] | None = None,
+    generation_assumptions: list[str] | None = None,
+    design_intent: dict[str, Any] | None = None,
+    design_intent_path: str = "",
+    design_intent_id: str = "",
+    design_intent_status: str = "",
 ) -> dict[str, Any]:
    engine = load_engine(settings)
    task = store.ensure_task(task_id, request)
    revision_id, revision_dir = store.next_revision(task["task_id"])
-    cdsl_copy = copy.deepcopy(cdsl)
-    cdsl_copy["part_id"] = task["task_id"]
-    meta = cdsl_copy.setdefault("meta", {})
-    if not isinstance(meta, dict):
-        raise ValueError("CDSL meta must be an object when present")
-    if not isinstance(meta.get("editable_parameters"), list) or not meta["editable_parameters"]:
-        meta["editable_parameters"] = _derived_parameters(cdsl_copy)
-    validate_cdsl(cdsl_copy, engine)
    cdsl_path = revision_dir / "model.cdsl.json"
    step_path = revision_dir / "model.step"
    glb_path = revision_dir / "model.glb"
@@ -352,13 +412,76 @@ def build_revision(
    parameters_path = revision_dir / "parameters.json"
    selector_path = revision_dir / "model.selector.json"
    edges_path = revision_dir / "model.edges.json"
+    part_skills_path = revision_dir / "part-skills.json"
+    intent = copy.deepcopy(design_intent) if isinstance(design_intent, dict) else {}
+    intent_assumptions = [str(item) for item in intent.get("assumptions") or [] if str(item)]
+    merged_assumptions = list(dict.fromkeys([
+        *intent_assumptions,
+        *(str(item) for item in generation_assumptions or [] if str(item)),
+    ]))
+    part_skill_audit = _part_skill_audit(part_skills, request, merged_assumptions)
+    intent_id = str(intent.get("intent_id") or design_intent_id or "")
+    if design_intent_path:
+        design_intent_path = str(design_intent_path)
+    part_skill_audit.update({
+        "design_intent_id": intent_id,
+        "design_intent_path": design_intent_path,
+        "intent_status": str(intent.get("status") or design_intent_status or ""),
+        "design_intent_assumptions": intent_assumptions,
+        "design_intent_capability_gaps": [
+            item for item in intent.get("capability_gaps") or [] if isinstance(item, dict)
+        ],
+    })
+    generation_context = _generation_context(reference_ids, part_skill_audit, intent, design_intent_path, intent_id)
    write_json(request_path, {"request": request, "created_at": now_iso()})
    write_json(references_path, {"reference_ids": reference_ids})
-    write_json(cdsl_path, cdsl_copy)
-    contract = parameter_contract(cdsl_copy)
-    write_json(parameters_path, contract)
+    write_json(part_skills_path, part_skill_audit)
+
+    def revision_record(status: str, *, error: str = "", engine_name: str = "") -> dict[str, Any]:
+        record = {
+            "revision_id": revision_id,
+            "status": status,
+            "created_at": now_iso(),
+            "request_path": request_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+            "cdsl_path": cdsl_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+            "report_path": report_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+            "parameters_path": parameters_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+            "part_skills_path": part_skills_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+            "design_intent_id": intent_id,
+            "design_intent_path": design_intent_path,
+            "part_skill_ids": list(part_skill_audit.get("skill_ids") or []),
+            "generation_assumptions": list(part_skill_audit.get("assumptions") or []),
+            "reference_ids": reference_ids,
+            "summary": summary,
+            "parent_revision_id": parent_revision_id or "",
+            "operation": operation or {},
+            "attachments": attachments or [],
+        }
+        if status == "success":
+            record.update({
+                "step_path": step_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+                "glb_path": glb_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+                "selector_path": selector_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+                "edges_path": edges_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
+                "engine": engine_name,
+            })
+        else:
+            record["error"] = error
+        return record

    try:
+        cdsl_copy = copy.deepcopy(cdsl)
+        if not isinstance(cdsl_copy, dict):
+            raise ValueError("CDSL must be a JSON object")
+        cdsl_copy["part_id"] = task["task_id"]
+        meta = cdsl_copy.setdefault("meta", {})
+        if not isinstance(meta, dict):
+            raise ValueError("CDSL meta must be an object when present")
+        if not isinstance(meta.get("editable_parameters"), list) or not meta["editable_parameters"]:
+            meta["editable_parameters"] = _derived_parameters(cdsl_copy)
+        write_json(cdsl_path, cdsl_copy)
+        write_json(parameters_path, parameter_contract(cdsl_copy))
+        validate_cdsl(cdsl_copy, engine)
        # Product revisions are semantic CDSL artifacts.  Do not route them
        # through the legacy rebuild entry point, which is allowed to use
        # compiler_context/translator compatibility fallbacks.
@@ -369,44 +492,23 @@ def build_revision(
        selector, edges = topology_sidecars(engine_result, preview)
        write_json(selector_path, selector)
        write_json(edges_path, edges)
-        report = {"engine_result": engine_result, "preview": preview, "validated_at": now_iso()}
+        report = {
+            "engine_result": engine_result,
+            "preview": preview,
+            "generation_context": generation_context,
+            "validated_at": now_iso(),
+        }
        write_json(report_path, report)
-        revision = {
-            "revision_id": revision_id,
-            "status": "success",
-            "created_at": now_iso(),
-            "request_path": request_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "cdsl_path": cdsl_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "step_path": step_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "glb_path": glb_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "report_path": report_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "parameters_path": parameters_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "selector_path": selector_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "edges_path": edges_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "reference_ids": reference_ids,
-            "summary": summary,
-            "engine": engine_result["engine"],
-            "parent_revision_id": parent_revision_id or "",
-            "operation": operation or {},
-            "attachments": attachments or [],
-        }
+        revision = revision_record("success", engine_name=str(engine_result["engine"]))
    except Exception as error:
-        write_json(report_path, {"error": str(error), "validated_at": now_iso()})
-        revision = {
-            "revision_id": revision_id,
-            "status": "failed",
-            "created_at": now_iso(),
-            "request_path": request_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "cdsl_path": cdsl_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "report_path": report_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "parameters_path": parameters_path.relative_to(store.task_dir(task["task_id"])).as_posix(),
-            "reference_ids": reference_ids,
-            "summary": summary,
+        if not cdsl_path.is_file() and isinstance(cdsl, dict):
+            write_json(cdsl_path, copy.deepcopy(cdsl))
+        write_json(report_path, {
            "error": str(error),
-            "parent_revision_id": parent_revision_id or "",
-            "operation": operation or {},
-            "attachments": attachments or [],
-        }
+            "generation_context": generation_context,
+            "validated_at": now_iso(),
+        })
+        revision = revision_record("failed", error=str(error))
        store.update_task(task["task_id"], revision)
        raise
    store.update_task(task["task_id"], revision)
@@ -0,0 +1,303 @@
+from __future__ import annotations
+
+import json
+import re
+import unicodedata
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+
+_WORD = re.compile(r"[a-z0-9]+(?:[-'][a-z0-9]+)*")
+_REPLACEMENT_INTENT = (
+    "replace the whole part",
+    "replace entire part",
+    "replace the part",
+    "replace this part",
+    "start over as",
+    "replace with a",
+    "替换整个零件",
+    "替换整个部件",
+    "替换零件",
+    "重新生成一个",
+    "改成一个新的",
+)
+
+
+def _normalize(value: str) -> str:
+    return unicodedata.normalize("NFKC", str(value or "")).casefold().strip()
+
+
+def _matches(text: str, phrase: str) -> bool:
+    normalized_text = _normalize(text)
+    normalized_phrase = _normalize(phrase)
+    if not normalized_phrase:
+        return False
+    if any("\u4e00" <= char <= "\u9fff" for char in normalized_phrase):
+        return normalized_phrase in normalized_text
+    words = _WORD.findall(normalized_phrase)
+    if not words:
+        return normalized_phrase in normalized_text
+    return bool(re.search(r"(?<![a-z0-9])" + r"\s+".join(map(re.escape, words)) + r"(?![a-z0-9])", normalized_text))
+
+
+def _specificity(phrase: str) -> int:
+    normalized = _normalize(phrase)
+    chinese = [char for char in normalized if "\u4e00" <= char <= "\u9fff"]
+    return len(chinese) if chinese else len(_WORD.findall(normalized))
+
+
+@dataclass(frozen=True)
+class PartSkill:
+    id: str
+    kind: str
+    title: str
+    priority: int
+    triggers: tuple[str, ...]
+    exclude: tuple[str, ...]
+    bridge: str
+    source: str
+    related: tuple[str, ...]
+    capability_translation_rules: tuple[str, ...]
+
+    @classmethod
+    def from_mapping(cls, value: dict[str, Any]) -> "PartSkill":
+        return cls(
+            id=str(value["id"]),
+            kind=str(value["kind"]),
+            title=str(value.get("title") or value["id"]),
+            priority=int(value.get("priority") or 0),
+            triggers=tuple(str(item) for item in value.get("triggers") or []),
+            exclude=tuple(str(item) for item in value.get("exclude") or []),
+            bridge=str(value["bridge"]),
+            source=str(value["source"]),
+            related=tuple(str(item) for item in value.get("related") or []),
+            capability_translation_rules=tuple(
+                str(item) for item in value.get("capability_translation_rules") or []
+            ),
+        )
+
+
+class PartSkillLibrary:
+    """Deterministic local selector for CDSL-specific part planning guidance."""
+
+    def __init__(self, root: Path) -> None:
+        self.root = Path(root)
+        payload = json.loads((self.root / "catalog.json").read_text(encoding="utf-8"))
+        self.max_planning = int(payload.get("max_planning") or 1)
+        self.max_support = int(payload.get("max_support") or 3)
+        self.skills = tuple(PartSkill.from_mapping(item) for item in payload.get("skills") or [])
+        self.by_id = {skill.id: skill for skill in self.skills}
+        if len(self.by_id) != len(self.skills):
+            raise ValueError("Part skill catalog contains duplicate ids")
+        for skill in self.skills:
+            for relative in (skill.bridge, skill.source):
+                if not (self.root / relative).is_file():
+                    raise ValueError(f"Part skill {skill.id} references missing file: {relative}")
+
+    def _matched(self, skill: PartSkill, request: str) -> tuple[int, tuple[str, ...]]:
+        if any(_matches(request, phrase) for phrase in skill.exclude):
+            return 0, ()
+        triggers = tuple(trigger for trigger in skill.triggers if _matches(request, trigger))
+        if not triggers:
+            return 0, ()
+        # Longer phrases are more specific than generic words such as "shaft"
+        # or "hole". Priority breaks ties between equally specific skills.
+        score = sum(max(1, _specificity(trigger)) * 10 for trigger in triggers)
+        return score + skill.priority, triggers
+
+    def _record(self, skill: PartSkill, *, selection: str, matched: tuple[str, ...] = ()) -> dict[str, Any]:
+        return {
+            "id": skill.id,
+            "kind": skill.kind,
+            "category": skill.kind,
+            "title": skill.title,
+            "source": skill.source,
+            "bridge": skill.bridge,
+            "capability_translation_rules": list(skill.capability_translation_rules),
+            "selection": selection,
+            "matched_triggers": list(matched),
+        }
+
+    def select(self, request: str, inherited_ids: list[str] | tuple[str, ...] = ()) -> dict[str, Any]:
+        inherited = [self.by_id[item] for item in inherited_ids if item in self.by_id]
+        scores = [(self._matched(skill, request), skill) for skill in self.skills]
+        planning_matches = sorted(
+            ((score, triggers, skill) for (score, triggers), skill in scores if skill.kind == "planning" and score),
+            key=lambda item: (-item[0], -item[2].priority, item[2].id),
+        )
+        inherited_planning = [skill for skill in inherited if skill.kind == "planning"]
+        planning: list[PartSkill] = inherited_planning[: self.max_planning]
+        conflict: dict[str, Any] | None = None
+        replacement_requested = any(_matches(request, phrase) for phrase in _REPLACEMENT_INTENT)
+        if not planning and planning_matches:
+            planning = [planning_matches[0][2]]
+        elif planning and planning_matches and planning_matches[0][2].id not in {skill.id for skill in planning}:
+            if replacement_requested:
+                planning = [planning_matches[0][2]]
+            else:
+                conflict = {
+                    "current": planning[0].id,
+                    "matched": planning_matches[0][2].id,
+                    "message": "A different primary part family matched this revision request; preserve the current family unless replacement is explicit.",
+                }
+
+        selected_ids = {skill.id for skill in planning}
+        inherited_planning_ids = {skill.id for skill in inherited_planning}
+        records = [
+            self._record(
+                skill,
+                selection="inherited" if skill.id in inherited_planning_ids else "selected",
+                matched=next((triggers for score, triggers, candidate in planning_matches if candidate.id == skill.id), ()),
+            )
+            for skill in planning
+        ]
+        support: list[tuple[int, int, int, str, PartSkill, tuple[str, ...]]] = []
+        related_ids = {related for skill in planning for related in skill.related}
+        direct_support: list[tuple[int, PartSkill, tuple[str, ...]]] = []
+        for (score, triggers), skill in scores:
+            if skill.kind == "planning" or not score:
+                continue
+            direct_support.append((score, skill, triggers))
+            bonus = 100 if skill.id in related_ids else 0
+            # Direct request matches always win over inherited context, even
+            # when the current planning family's catalog does not name them.
+            support.append((3, bonus + score, skill.priority, skill.id, skill, triggers))
+        direct_related_ids = {
+            related
+            for _, skill, _ in direct_support
+            for related in skill.related
+            if related in self.by_id and self.by_id[related].kind != "planning"
+        }
+        known_support_ids = {item[3] for item in support}
+        for related_id in sorted(direct_related_ids - known_support_ids):
+            skill = self.by_id[related_id]
+            planning_bonus = 25 if skill.id in related_ids else 0
+            support.append((2, 50 + planning_bonus, skill.priority, skill.id, skill, ()))
+            known_support_ids.add(skill.id)
+        for skill in inherited:
+            if skill.kind != "planning" and skill.id not in known_support_ids:
+                # Keep prior guidance only after direct request matches and
+                # their catalog-declared supporting rules.
+                support.append((1, 0, skill.priority, skill.id, skill, ()))
+                known_support_ids.add(skill.id)
+        support.sort(key=lambda item: (-item[0], -item[1], -item[2], item[3]))
+        for _, _, _, _, skill, triggers in support:
+            if len(records) - len(planning) >= self.max_support or skill.id in selected_ids:
+                continue
+            selected_ids.add(skill.id)
+            inherited_marker = "inherited" if skill in inherited else "selected"
+            records.append(self._record(skill, selection=inherited_marker, matched=triggers))
+        return {
+            "schema_version": "1.0",
+            "request": str(request or ""),
+            "skills": records,
+            "skill_ids": [record["id"] for record in records],
+            "planning_ids": [record["id"] for record in records if record["kind"] == "planning"],
+            "support_ids": [record["id"] for record in records if record["kind"] != "planning"],
+            "inherited_skill_ids": [skill.id for skill in inherited],
+            "replacement_requested": replacement_requested,
+            "conflict": conflict,
+        }
+
+    def inherited_from_task(self, task: dict[str, Any] | None) -> list[str]:
+        revision_id = str((task or {}).get("current_revision") or "")
+        revisions = (task or {}).get("revisions") or []
+        revision = next((item for item in revisions if item.get("revision_id") == revision_id), None)
+        revision_ids = [str(item) for item in (revision or {}).get("part_skill_ids") or [] if str(item) in self.by_id]
+        if revision_ids:
+            return revision_ids
+        # A valid DesignIntent creates a task before the first runtime build.
+        # Its canonical backend selection must therefore be inheritable too.
+        intent_id = str((task or {}).get("current_design_intent_id") or "")
+        intent = next(
+            (item for item in (task or {}).get("design_intents") or [] if str(item.get("intent_id") or "") == intent_id),
+            None,
+        )
+        return [str(item) for item in (intent or {}).get("part_skill_ids") or [] if str(item) in self.by_id]
+
+    def render_context(self, selection: dict[str, Any]) -> str:
+        records = selection.get("skills") or []
+        if not records:
+            return "No part-family skill matched this request. Use the CDSL schema and library only."
+        sections = [
+            "Selected CDSL part-skill guidance (planning context only):",
+            "Part skill guidance never overrides the user request or the authoritative CDSL schema/runtime.",
+            "Translate the guidance into valid CDSL; do not emit build123d source or invent atomics.",
+        ]
+        for record in records:
+            path = self.root / str(record["bridge"])
+            sections.append(f"\n[{record['id']}] ({record['selection']})\n{path.read_text(encoding='utf-8').strip()}")
+        if selection.get("conflict"):
+            sections.append("\nPrimary-family conflict: preserve the current task family. Ask one concise clarification question and do not generate until the user explicitly requests whole-part replacement or confirms the current family.")
+        return "\n".join(sections)
+
+    def audit(self, selection: dict[str, Any], cdsl: dict[str, Any], assumptions: list[str] | None = None) -> dict[str, Any]:
+        features = [item for item in cdsl.get("features") or [] if isinstance(item, dict)]
+        feature_ids = [str(item.get("id")) for item in features if item.get("id")]
+        atomics = [str(item.get("atomic_id")) for item in features]
+        sketches = [item for item in (cdsl.get("geometry") or {}).get("sketches") or [] if isinstance(item, dict)]
+        profiles = [str((item.get("profile") or {}).get("type")) for item in sketches]
+        evidence = {
+            "feature_ids": feature_ids,
+            "atomic_ids": sorted(set(atomics)),
+            "profile_types": sorted(set(profiles)),
+            "features": [
+                {
+                    "id": str(item.get("id") or ""),
+                    "atomic_id": str(item.get("atomic_id") or ""),
+                    "sketch_id": str(item.get("sketch_id") or ""),
+                    "params": item.get("params") if isinstance(item.get("params"), dict) else {},
+                }
+                for item in features
+            ],
+            "profiles": [
+                {
+                    "id": str(item.get("id") or ""),
+                    "type": str((item.get("profile") or {}).get("type") or ""),
+                    "profile": item.get("profile") if isinstance(item.get("profile"), dict) else {},
+                }
+                for item in sketches
+            ],
+        }
+        translations: list[dict[str, Any]] = []
+        for record in selection.get("skills") or []:
+            skill_id = str(record.get("id"))
+            status = "exact"
+            reason = "The selected structural guidance is represented by the submitted CDSL plan."
+            if skill_id == "functional/flange-bolt-circle":
+                if "circles" in profiles and "extrude_cut_blind" in atomics:
+                    status, reason = "expanded", "Circular bolt layout is represented by explicit circle geometry because no circular-pattern atomic exists."
+                else:
+                    status, reason = "blocked", "No explicit circular bolt layout evidence was found in the CDSL."
+            elif skill_id == "atomic/threaded-hole-creation":
+                status, reason = "approximated", "The current runtime preserves a cylindrical bore but does not generate helical thread topology."
+            elif skill_id == "atomic/fillet-chamfer-last":
+                finishing = [item for item in features if item.get("atomic_id") in {"fillet", "chamfer"}]
+                if not finishing:
+                    status, reason = "omitted", "No stable finishing selector was submitted; edge treatment was omitted."
+            elif skill_id == "atomic/pattern-holes-from-datum":
+                if "circles" in profiles or "circle_grid" in profiles:
+                    status, reason = "expanded", "The layout is represented by explicit profile circles."
+                elif not any(item in {"pattern_linear", "pattern_mirror"} for item in atomics):
+                    status, reason = "blocked", "No supported pattern or explicit circle layout was found."
+            translation: dict[str, Any] = {"skill_id": skill_id, "status": status, "reason": reason, "evidence": evidence}
+            if skill_id == "functional/flange-bolt-circle" and status == "expanded":
+                translation["translation"] = "circular_pattern_to_explicit_circles"
+            elif skill_id == "atomic/threaded-hole-creation":
+                translation["translation"] = "thread_geometry_omitted"
+            elif skill_id == "atomic/fillet-chamfer-last" and status == "omitted":
+                translation["translation"] = "selector_unavailable"
+            translations.append(translation)
+        return {
+            "schema_version": "1.0",
+            "request": selection.get("request", ""),
+            "structural_intent": selection.get("request", ""),
+            "skill_ids": list(selection.get("skill_ids") or []),
+            "skills": list(selection.get("skills") or []),
+            "inherited_skill_ids": list(selection.get("inherited_skill_ids") or []),
+            "conflict": selection.get("conflict"),
+            "assumptions": [str(item) for item in assumptions or []],
+            "evidence": evidence,
+            "capability_translations": translations,
+        }
@@ -12,6 +12,7 @@ from app.settings import Settings

 TASK_ID = re.compile(r"^cad_[a-z0-9]{12}$")
 CONVERSATION_ID = re.compile(r"^conv_[a-z0-9]{12}$")
+DESIGN_INTENT_ID = re.compile(r"^intent_[a-z0-9]{12}$")


 def now_iso() -> str:
@@ -36,6 +37,13 @@ def safe_conversation_id(conversation_id: str) -> str:
    return value


+def safe_design_intent_id(intent_id: str) -> str:
+    value = str(intent_id or "").strip()
+    if not DESIGN_INTENT_ID.fullmatch(value):
+        raise ValueError("Invalid design intent id")
+    return value
+
+
 def safe_relative_path(value: str) -> str:
    path = Path(str(value or ""))
    if not value or path.is_absolute() or ".." in path.parts:
@@ -102,7 +110,7 @@ class WorkspaceStore:
                write_json(path, current)
            return current
        record = {
-            "schema_version": "1.0",
+            "schema_version": "1.1",
            "conversation_id": cid,
            "created_at": now_iso(),
            "updated_at": now_iso(),
@@ -144,12 +152,14 @@ class WorkspaceStore:
        task_dir = self.task_dir(tid)
        (task_dir / "revisions").mkdir(parents=True, exist_ok=True)
        record = {
-            "schema_version": "1.0",
+            "schema_version": "1.1",
            "task_id": tid,
            "request": request,
            "created_at": now_iso(),
            "updated_at": now_iso(),
            "current_revision": "",
+            "current_design_intent_id": "",
+            "design_intents": [],
            "revisions": [],
        }
        write_json(path, record)
@@ -171,6 +181,81 @@ class WorkspaceStore:
        write_json(self.task_path(task_id), task)
        return task

+    def create_design_intent(
+        self,
+        task_id: str | None,
+        request: str,
+        intent: dict[str, Any],
+        part_skill_selection: dict[str, Any],
+    ) -> dict[str, Any]:
+        """Persist a validated plan and atomically make it the current plan."""
+        task = self.ensure_task(task_id, request)
+        task.setdefault("design_intents", [])
+        task.setdefault("current_design_intent_id", "")
+        task["schema_version"] = "1.1"
+        previous_id = str(task.get("current_design_intent_id") or "")
+        if previous_id:
+            for record in task["design_intents"]:
+                if str(record.get("intent_id") or "") == previous_id and record.get("status") != "superseded":
+                    record["status"] = "superseded"
+
+        intent_id = new_id("intent")
+        created_at = now_iso()
+        relative = Path("planning") / f"design-intent-{intent_id}.json"
+        skill_ids = [str(item) for item in part_skill_selection.get("skill_ids") or [] if str(item)]
+        persisted = dict(intent)
+        persisted.update({
+            "intent_id": intent_id,
+            "created_at": created_at,
+            "part_skill_ids": skill_ids,
+            "part_skill_selection": part_skill_selection,
+        })
+        write_json(self.artifact_path(task["task_id"], relative.as_posix()), persisted)
+        record = {
+            "intent_id": intent_id,
+            "status": "accepted" if persisted.get("status") == "ready" else "pending",
+            "created_at": created_at,
+            "path": relative.as_posix(),
+            "part_skill_ids": skill_ids,
+            "base_revision_id": str(persisted.get("base_revision_id") or ""),
+        }
+        task["design_intents"].append(record)
+        task["current_design_intent_id"] = intent_id
+        task["updated_at"] = now_iso()
+        write_json(self.task_path(task["task_id"]), task)
+        return {"task_id": task["task_id"], **record, "intent": persisted}
+
+    def read_design_intent(self, task_id: str, intent_id: str | None = None) -> dict[str, Any] | None:
+        task = self.read_task(task_id)
+        if not task:
+            return None
+        chosen = safe_design_intent_id(intent_id) if intent_id else str(task.get("current_design_intent_id") or "")
+        if not chosen:
+            return None
+        record = next(
+            (item for item in task.get("design_intents") or [] if str(item.get("intent_id") or "") == chosen),
+            None,
+        )
+        if not isinstance(record, dict):
+            return None
+        path = self.artifact_path(task_id, str(record.get("path") or ""))
+        intent = read_json(path)
+        if not isinstance(intent, dict):
+            return None
+        return {"task_id": task_id, "record": record, "intent": intent}
+
+    def update_design_intent_status(self, task_id: str, intent_id: str, status: str) -> dict[str, Any]:
+        safe_id = safe_design_intent_id(intent_id)
+        task = self.ensure_task(task_id, "")
+        records = task.setdefault("design_intents", [])
+        record = next((item for item in records if str(item.get("intent_id") or "") == safe_id), None)
+        if not isinstance(record, dict):
+            raise ValueError("Design intent not found")
+        record["status"] = str(status)
+        task["updated_at"] = now_iso()
+        write_json(self.task_path(task_id), task)
+        return record
+
    def read_task(self, task_id: str) -> dict[str, Any] | None:
        return read_json(self.task_path(task_id))

@@ -13,6 +13,7 @@ from .rebuild import compare_with_gold, compile_cdsl_to_pack, run_cdsl_only, run
 from .semantic_validation import validate_semantic_cdsl
 from .sketch_solver import SHAPE_GENERATORS, resolve_all_sketches, resolve_required_sketches
 from .runtime import ALL_ATOMIC_IDS, EXECUTORS, RuntimeExecutionError, analyze_cdsl, rebuild_cdsl
+from .design_intent import DesignIntentError, design_intent_from_cdsl, validate_design_intent, validate_intent_cdsl

 # The package-level runtime contract is the session executor registry.  The
 # older llm_engine dispatcher remains available only for legacy engine packs.
@@ -38,6 +39,10 @@ __all__ = [
    "rebuild_cdsl",
    "analyze_cdsl",
    "RuntimeExecutionError",
+    "DesignIntentError",
+    "validate_design_intent",
+    "validate_intent_cdsl",
+    "design_intent_from_cdsl",
 ]

 __version__ = "1.0.0"
@@ -0,0 +1,331 @@
+"""Validation for the semantic planning artifact between a request and CDSL."""
+
+from __future__ import annotations
+
+import json
+from copy import deepcopy
+from pathlib import Path
+from typing import Any
+
+from jsonschema import Draft202012Validator
+from jsonschema.exceptions import SchemaError
+
+
+class DesignIntentError(ValueError):
+    """A plan-contract violation with a stable error code for the Agent."""
+
+    def __init__(self, code: str, message: str) -> None:
+        super().__init__(message)
+        self.code = code
+
+
+def _schema_path(engine: Any) -> Path:
+    return Path(str(engine.__file__)).with_name("design_intent_schema.json")
+
+
+def load_design_intent_schema(engine: Any) -> dict[str, Any]:
+    path = _schema_path(engine)
+    try:
+        schema = json.loads(path.read_text(encoding="utf-8"))
+        Draft202012Validator.check_schema(schema)
+    except (OSError, json.JSONDecodeError, SchemaError) as error:
+        raise RuntimeError("The local DesignIntent JSON Schema is unavailable or invalid") from error
+    return schema
+
+
+def _location(error: Any) -> str:
+    return "$" + "".join(
+        f"[{item}]" if isinstance(item, int) else f".{item}"
+        for item in error.absolute_path
+    )
+
+
+def _schema_validate(intent: dict[str, Any], engine: Any) -> None:
+    errors = sorted(
+        Draft202012Validator(load_design_intent_schema(engine)).iter_errors(intent),
+        key=lambda error: (list(error.absolute_path), error.message),
+    )
+    if errors:
+        error = errors[0]
+        raise DesignIntentError(
+            "INVALID_DESIGN_INTENT",
+            f"DesignIntent schema violation at {_location(error)}: {error.message}",
+        )
+
+
+def _runtime_capabilities(engine: Any) -> tuple[set[str], set[str], dict[str, dict[str, Any]]]:
+    try:
+        profile_schema = json.loads(Path(str(engine.__file__)).with_name("profile_schema.json").read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError) as error:
+        raise RuntimeError("The local CDSL profile schema is unavailable or invalid") from error
+    atomic_ids = set(profile_schema.get("runtime_supported_atomic_ids") or getattr(engine, "SUPPORTED_ATOMIC_IDS", ()))
+    profiles = {
+        name
+        for name, contract in (profile_schema.get("profiles") or {}).items()
+        if isinstance(contract, dict) and contract.get("agent_allowed") is True
+    }
+    atomic_contracts = {
+        str(atomic_id): contract
+        for atomic_id, contract in (profile_schema.get("feature_atomic_ids") or {}).items()
+        if isinstance(contract, dict)
+    }
+    return {str(item) for item in atomic_ids}, {str(item) for item in profiles}, atomic_contracts
+
+
+def _blocking(intent: dict[str, Any]) -> bool:
+    questions = intent.get("open_questions") or []
+    gaps = intent.get("capability_gaps") or []
+    return any(isinstance(item, dict) and item.get("blocking") is True for item in [*questions, *gaps])
+
+
+def validate_design_intent(
+    intent: dict[str, Any],
+    engine: Any,
+    *,
+    current_revision_id: str = "",
+) -> dict[str, Any]:
+    """Validate DesignIntent syntax and semantic ordering against runtime capability."""
+    if not isinstance(intent, dict):
+        raise DesignIntentError("INVALID_DESIGN_INTENT", "DesignIntent must be a JSON object")
+    _schema_validate(intent, engine)
+
+    normalized = deepcopy(intent)
+    mode = str(normalized["mode"])
+    base_revision_id = str(normalized["base_revision_id"] or "")
+    if mode == "create" and base_revision_id:
+        raise DesignIntentError("INVALID_DESIGN_INTENT", "create DesignIntent must not set base_revision_id")
+    if mode == "revise":
+        if not base_revision_id:
+            raise DesignIntentError("INVALID_DESIGN_INTENT", "revise DesignIntent requires base_revision_id")
+        if current_revision_id and base_revision_id != current_revision_id:
+            raise DesignIntentError(
+                "INVALID_DESIGN_INTENT",
+                "revise DesignIntent base_revision_id must be the current successful revision",
+            )
+
+    structures = normalized["structures"]
+    ids = [str(item["id"]) for item in structures]
+    feature_ids = [str(item["cdsl_feature_id"]) for item in structures]
+    if len(set(ids)) != len(ids):
+        raise DesignIntentError("INVALID_DESIGN_INTENT", "DesignIntent structure ids must be unique")
+    if len(set(feature_ids)) != len(feature_ids):
+        raise DesignIntentError("INVALID_DESIGN_INTENT", "DesignIntent cdsl_feature_id values must be unique")
+
+    feature_order = [str(item) for item in normalized["feature_order"]]
+    if len(set(feature_order)) != len(feature_order) or set(feature_order) != set(ids):
+        raise DesignIntentError(
+            "INVALID_DESIGN_INTENT",
+            "feature_order must list every DesignIntent structure exactly once",
+        )
+    order = {structure_id: index for index, structure_id in enumerate(feature_order)}
+    atomic_ids, profile_types, atomic_contracts = _runtime_capabilities(engine)
+    for structure in structures:
+        structure_id = str(structure["id"])
+        for dependency in structure["depends_on"]:
+            dependency_id = str(dependency)
+            if dependency_id not in order:
+                raise DesignIntentError(
+                    "INVALID_DESIGN_INTENT",
+                    f"Structure {structure_id} depends on an unknown structure {dependency_id}",
+                )
+            if order[dependency_id] >= order[structure_id]:
+                raise DesignIntentError(
+                    "INVALID_DESIGN_INTENT",
+                    f"Structure {structure_id} must depend only on earlier feature_order entries",
+                )
+        strategy = structure["cdsl_strategy"]
+        atomic_id = str(strategy["atomic_id"])
+        if atomic_id not in atomic_ids:
+            raise DesignIntentError(
+                "INVALID_DESIGN_INTENT",
+                f"Structure {structure_id} uses unsupported atomic_id {atomic_id}",
+            )
+        profile_type = str(strategy.get("profile_type") or "")
+        if atomic_contracts.get(atomic_id, {}).get("requires_sketch") and not profile_type:
+            raise DesignIntentError(
+                "INVALID_DESIGN_INTENT",
+                f"Structure {structure_id} uses {atomic_id} and requires a profile_type",
+            )
+        if profile_type and profile_type not in profile_types:
+            raise DesignIntentError(
+                "INVALID_DESIGN_INTENT",
+                f"Structure {structure_id} uses unsupported or agent-disallowed profile_type {profile_type}",
+            )
+
+    if normalized["status"] == "ready" and _blocking(normalized):
+        raise DesignIntentError(
+            "DESIGN_INTENT_BLOCKED",
+            "A DesignIntent with blocking questions or capability gaps must need clarification",
+        )
+    if normalized["status"] == "needs_clarification" and not _blocking(normalized):
+        raise DesignIntentError(
+            "INVALID_DESIGN_INTENT",
+            "needs_clarification requires a blocking question or capability gap",
+        )
+    if normalized["status"] == "ready" and not structures:
+        raise DesignIntentError("INVALID_DESIGN_INTENT", "A ready DesignIntent needs at least one structure")
+    if normalized["status"] == "ready" and mode == "create" and not any(item["role"] == "base" for item in structures):
+        raise DesignIntentError("INVALID_DESIGN_INTENT", "A ready create DesignIntent needs a base structure")
+    nonblocking_gaps = [item for item in normalized["capability_gaps"] if not item["blocking"]]
+    if nonblocking_gaps and not normalized["assumptions"]:
+        raise DesignIntentError(
+            "INVALID_DESIGN_INTENT",
+            "Non-blocking capability gaps require an explicit approximation assumption",
+        )
+    for gap in normalized["capability_gaps"]:
+        if str(gap["structure_id"]) not in set(ids):
+            raise DesignIntentError(
+                "INVALID_DESIGN_INTENT",
+                f"Capability gap references an unknown structure {gap['structure_id']}",
+            )
+    valid_expectation_ids = set(ids) | set(feature_ids)
+    for expectation in normalized["verification_expectations"]:
+        if expectation["type"] == "feature_count" and str(expectation["feature_id"]) not in valid_expectation_ids:
+            raise DesignIntentError(
+                "INVALID_DESIGN_INTENT",
+                f"feature_count expectation references an unknown structure or CDSL feature {expectation['feature_id']}",
+            )
+    return normalized
+
+
+def _has_selector_evidence(value: Any, role: str) -> bool:
+    if isinstance(value, dict):
+        for key, child in value.items():
+            if role in {"selector", "selectors"} and key == "selectors" and isinstance(child, list) and child:
+                return True
+            if key == role and child not in (None, "", [], {}):
+                if not (isinstance(child, dict) and set(child) == {"unresolved"}):
+                    return True
+            if _has_selector_evidence(child, role):
+                return True
+    elif isinstance(value, list):
+        return any(_has_selector_evidence(item, role) for item in value)
+    return False
+
+
+def validate_intent_cdsl(
+    intent: dict[str, Any],
+    cdsl: dict[str, Any],
+    engine: Any,
+    *,
+    current_cdsl: dict[str, Any] | None = None,
+) -> None:
+    """Ensure an executable CDSL document faithfully realizes one accepted plan."""
+    normalized = validate_design_intent(intent, engine)
+    if normalized["status"] != "ready":
+        raise DesignIntentError("DESIGN_INTENT_BLOCKED", "CDSL generation is blocked until the DesignIntent is ready")
+    if not isinstance(cdsl, dict):
+        raise DesignIntentError("INTENT_CDSL_MISMATCH", "CDSL must be a JSON object")
+    features = cdsl.get("features")
+    sketches = (cdsl.get("geometry") or {}).get("sketches")
+    if not isinstance(features, list) or not isinstance(sketches, list):
+        raise DesignIntentError("INTENT_CDSL_MISMATCH", "CDSL must contain features and sketches")
+    feature_by_id = {str(feature.get("id") or ""): feature for feature in features if isinstance(feature, dict)}
+    if len(feature_by_id) != len(features):
+        raise DesignIntentError("INTENT_CDSL_MISMATCH", "CDSL features must have unique ids")
+    structure_by_id = {str(item["id"]): item for item in normalized["structures"]}
+    expected_feature_ids = [str(structure_by_id[item]["cdsl_feature_id"]) for item in normalized["feature_order"]]
+    if normalized["mode"] == "revise" and isinstance(current_cdsl, dict):
+        base_feature_ids = {
+            str(feature.get("id") or "")
+            for feature in current_cdsl.get("features") or []
+            if isinstance(feature, dict) and feature.get("id")
+        }
+        if not base_feature_ids.issubset(set(expected_feature_ids)):
+            missing = ", ".join(sorted(base_feature_ids - set(expected_feature_ids)))
+            raise DesignIntentError(
+                "INTENT_CDSL_MISMATCH",
+                f"revise DesignIntent must explicitly preserve current features: {missing}",
+            )
+    actual_feature_ids = [str(feature.get("id") or "") for feature in features]
+    if actual_feature_ids != expected_feature_ids:
+        raise DesignIntentError(
+            "INTENT_CDSL_MISMATCH",
+            "CDSL feature ids and order must exactly match DesignIntent feature_order",
+        )
+    sketch_by_id = {str(sketch.get("id") or ""): sketch for sketch in sketches if isinstance(sketch, dict)}
+    feature_for_structure = {
+        str(structure["id"]): feature_by_id[str(structure["cdsl_feature_id"])]
+        for structure in normalized["structures"]
+    }
+    for structure in normalized["structures"]:
+        structure_id = str(structure["id"])
+        feature = feature_for_structure[structure_id]
+        strategy = structure["cdsl_strategy"]
+        if feature.get("atomic_id") != strategy["atomic_id"]:
+            raise DesignIntentError(
+                "INTENT_CDSL_MISMATCH",
+                f"CDSL feature {feature.get('id')} atomic_id does not match structure {structure_id}",
+            )
+        expected_dependencies = {
+            str(structure_by_id[dependency]["cdsl_feature_id"])
+            for dependency in structure["depends_on"]
+        }
+        actual_dependencies = {str(item) for item in feature.get("depends_on") or []}
+        if not expected_dependencies.issubset(actual_dependencies):
+            raise DesignIntentError(
+                "INTENT_CDSL_MISMATCH",
+                f"CDSL feature {feature.get('id')} is missing planned dependencies",
+            )
+        profile_type = str(strategy.get("profile_type") or "")
+        if profile_type:
+            sketch_id = str(feature.get("sketch_id") or "")
+            sketch = sketch_by_id.get(sketch_id)
+            actual_profile_type = str(((sketch or {}).get("profile") or {}).get("type") or "")
+            if actual_profile_type != profile_type:
+                raise DesignIntentError(
+                    "INTENT_CDSL_MISMATCH",
+                    f"CDSL feature {feature.get('id')} must use profile_type {profile_type}",
+                )
+        for selector_role in strategy["selector_roles"]:
+            if not _has_selector_evidence(feature, str(selector_role)):
+                raise DesignIntentError(
+                    "INTENT_CDSL_MISMATCH",
+                    f"CDSL feature {feature.get('id')} is missing selector evidence for {selector_role}",
+                )
+
+
+def design_intent_from_cdsl(cdsl: dict[str, Any], *, request: str, mode: str = "create", base_revision_id: str = "") -> dict[str, Any]:
+    """Create a conservative audit-only plan for legacy revisions when needed."""
+    sketches = (cdsl.get("geometry") or {}).get("sketches") or []
+    profile_by_sketch_id = {
+        str(sketch.get("id") or ""): str((sketch.get("profile") or {}).get("type") or "")
+        for sketch in sketches
+        if isinstance(sketch, dict)
+    }
+    structures: list[dict[str, Any]] = []
+    for index, feature in enumerate(cdsl.get("features") or []):
+        if not isinstance(feature, dict):
+            continue
+        feature_id = str(feature.get("id") or f"feature_{index + 1}")
+        atomic_id = str(feature.get("atomic_id") or "")
+        profile_type = profile_by_sketch_id.get(str(feature.get("sketch_id") or ""), "")
+        strategy: dict[str, Any] = {
+            "atomic_id": atomic_id,
+            "parameter_roles": sorted(str(key) for key in (feature.get("params") or {}).keys()),
+            "selector_roles": [],
+        }
+        if profile_type:
+            strategy["profile_type"] = profile_type
+        structures.append({
+            "id": feature_id,
+            "cdsl_feature_id": feature_id,
+            "role": "base" if index == 0 else "subtractive" if "cut" in atomic_id or atomic_id.startswith("hole") else "additive",
+            "purpose": str(feature.get("name") or feature_id),
+            "depends_on": [str(item) for item in feature.get("depends_on") or []],
+            "cdsl_strategy": strategy,
+        })
+    return {
+        "schema": "cad.cdsl.design-intent.v1",
+        "schema_version": "1.0",
+        "mode": mode,
+        "request": request,
+        "base_revision_id": base_revision_id,
+        "structures": structures,
+        "feature_order": [item["id"] for item in structures],
+        "assumptions": ["Synthesized from a legacy CDSL revision."],
+        "open_questions": [],
+        "capability_gaps": [],
+        "verification_expectations": [],
+        "status": "ready",
+    }
@@ -0,0 +1,124 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://cdsl.local/schema/cad.cdsl.design-intent.v1",
+  "title": "CDSL design intent",
+  "type": "object",
+  "properties": {
+    "schema": {"const": "cad.cdsl.design-intent.v1"},
+    "schema_version": {"const": "1.0"},
+    "mode": {"enum": ["create", "revise"]},
+    "request": {"type": "string", "minLength": 1},
+    "base_revision_id": {"type": "string"},
+    "structures": {"type": "array", "items": {"$ref": "#/$defs/structure"}},
+    "feature_order": {"type": "array", "items": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"}},
+    "assumptions": {"type": "array", "items": {"type": "string", "minLength": 1}},
+    "open_questions": {"type": "array", "items": {"$ref": "#/$defs/openQuestion"}},
+    "capability_gaps": {"type": "array", "items": {"$ref": "#/$defs/capabilityGap"}},
+    "verification_expectations": {"type": "array", "items": {"$ref": "#/$defs/verificationExpectation"}},
+    "status": {"enum": ["ready", "needs_clarification"]},
+    "intent_id": {"type": "string", "pattern": "^intent_[a-z0-9]{12}$"},
+    "created_at": {"type": "string", "minLength": 1},
+    "part_skill_ids": {"type": "array", "items": {"type": "string", "minLength": 1}},
+    "part_skill_selection": {"type": "object"}
+  },
+  "required": [
+    "schema",
+    "schema_version",
+    "mode",
+    "request",
+    "base_revision_id",
+    "structures",
+    "feature_order",
+    "assumptions",
+    "open_questions",
+    "capability_gaps",
+    "verification_expectations",
+    "status"
+  ],
+  "additionalProperties": false,
+  "$defs": {
+    "structure": {
+      "type": "object",
+      "properties": {
+        "id": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"},
+        "cdsl_feature_id": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"},
+        "role": {"enum": ["base", "reference", "additive", "subtractive", "dressup", "pattern"]},
+        "purpose": {"type": "string", "minLength": 1},
+        "depends_on": {"type": "array", "items": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"}},
+        "cdsl_strategy": {"$ref": "#/$defs/cdslStrategy"}
+      },
+      "required": ["id", "cdsl_feature_id", "role", "purpose", "depends_on", "cdsl_strategy"],
+      "additionalProperties": false
+    },
+    "cdslStrategy": {
+      "type": "object",
+      "properties": {
+        "atomic_id": {"type": "string", "minLength": 1},
+        "profile_type": {"type": "string", "minLength": 1},
+        "parameter_roles": {"type": "array", "items": {"type": "string", "minLength": 1}},
+        "selector_roles": {"type": "array", "items": {"type": "string", "minLength": 1}}
+      },
+      "required": ["atomic_id", "parameter_roles", "selector_roles"],
+      "additionalProperties": false
+    },
+    "openQuestion": {
+      "type": "object",
+      "properties": {
+        "id": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"},
+        "question": {"type": "string", "minLength": 1},
+        "blocking": {"type": "boolean"}
+      },
+      "required": ["id", "question", "blocking"],
+      "additionalProperties": false
+    },
+    "capabilityGap": {
+      "type": "object",
+      "properties": {
+        "code": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,100}$"},
+        "structure_id": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"},
+        "message": {"type": "string", "minLength": 1},
+        "blocking": {"type": "boolean"}
+      },
+      "required": ["code", "structure_id", "message", "blocking"],
+      "additionalProperties": false
+    },
+    "verificationExpectation": {
+      "oneOf": [
+        {
+          "type": "object",
+          "properties": {
+            "type": {"const": "feature_count"},
+            "feature_id": {"type": "string", "pattern": "^[A-Za-z0-9_-]{1,80}$"},
+            "expected": {"type": "integer", "minimum": 0}
+          },
+          "required": ["type", "feature_id", "expected"],
+          "additionalProperties": false
+        },
+        {
+          "type": "object",
+          "properties": {"type": {"const": "symmetry"}, "axis": {"enum": ["x", "y", "z"]}},
+          "required": ["type", "axis"],
+          "additionalProperties": false
+        },
+        {
+          "type": "object",
+          "properties": {
+            "type": {"const": "bbox"},
+            "expected_mm": {
+              "type": "object",
+              "properties": {
+                "x": {"type": "number", "exclusiveMinimum": 0},
+                "y": {"type": "number", "exclusiveMinimum": 0},
+                "z": {"type": "number", "exclusiveMinimum": 0}
+              },
+              "required": ["x", "y", "z"],
+              "additionalProperties": false
+            }
+          },
+          "required": ["type", "expected_mm"],
+          "additionalProperties": false
+        }
+      ]
+    }
+  }
+}
@@ -62,11 +62,11 @@ class ParseToolArgumentsTests(unittest.TestCase):
        self.assertNotIn("extrude", cdsl["$defs"]["feature_atomic_ids"]["enum"])
        self.assertEqual(cdsl, CDSL_TOOL_SCHEMA)

-    def test_strict_tool_schema_is_limited_to_cdsl_generation_arguments(self) -> None:
+    def test_strict_tool_schema_covers_design_intent_and_cdsl_generation_arguments(self) -> None:
        tools = tools_for_model(ProviderModel("strict-model", strict_tool_schema=True))
        strict_tools = [tool["function"]["name"] for tool in tools if tool["function"].get("strict")]

-        self.assertEqual(strict_tools, ["generate_cdsl_model"])
+        self.assertEqual(strict_tools, ["propose_design_intent", "generate_cdsl_model"])
        generate_tool = next(tool for tool in tools if tool["function"]["name"] == "generate_cdsl_model")
        self.assertEqual(generate_tool["function"]["parameters"]["properties"]["summary"], {"type": "string", "minLength": 1})
        self.assertEqual(generate_tool["function"]["parameters"]["properties"]["cdsl"], CDSL_TOOL_SCHEMA)
@@ -243,7 +243,7 @@ class ToolArgumentsRetryTests(unittest.TestCase):
            self.assertTrue(any("已修正工具参数" in str(event.get("text", "")) for event in events))
            self.assertEqual(list(settings.task_root.glob("cad_*")), [])

-    def test_incomplete_cdsl_is_returned_to_the_model_without_creating_a_task(self) -> None:
+    def test_direct_cdsl_generation_is_rejected_without_creating_a_task(self) -> None:
        class RetryAgent(AgentService):
            def __init__(self, *args: object, **kwargs: object) -> None:
                super().__init__(*args, **kwargs)
@@ -328,8 +328,8 @@ class ToolArgumentsRetryTests(unittest.TestCase):

            tool_result = agent.seen_messages[1][-1]
            self.assertEqual(tool_result["role"], "tool")
-            self.assertEqual(json.loads(str(tool_result["content"]))["code"], "INVALID_CDSL")
-            self.assertEqual(agent.required_tools, [None, "generate_cdsl_model", None])
+            self.assertEqual(json.loads(str(tool_result["content"]))["code"], "DESIGN_INTENT_REQUIRED")
+            self.assertEqual(agent.required_tools, [None, None, None])
            self.assertEqual(list(settings.task_root.glob("cad_*")), [])


@@ -0,0 +1,202 @@
+from __future__ import annotations
+
+import copy
+import sys
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+sys.path.insert(0, str(ROOT / "backend"))
+
+
+
+def workplane(z: float = 0.0) -> dict[str, list[float]]:
+    return {
+        "origin_mm": [0.0, 0.0, z],
+        "x_dir": [1.0, 0.0, 0.0],
+        "y_dir": [0.0, 1.0, 0.0],
+        "normal": [0.0, 0.0, 1.0],
+    }
+
+
+def mounting_plate_intent() -> dict:
+    return {
+        "schema": "cad.cdsl.design-intent.v1",
+        "schema_version": "1.0",
+        "mode": "create",
+        "request": "Create a mounting plate with four holes and a center slot",
+        "base_revision_id": "",
+        "structures": [
+            {
+                "id": "base_plate",
+                "cdsl_feature_id": "base_add",
+                "role": "base",
+                "purpose": "Rectangular mounting plate",
+                "depends_on": [],
+                "cdsl_strategy": {
+                    "atomic_id": "extrude_add_blind",
+                    "profile_type": "rectangle",
+                    "parameter_roles": ["width_mm", "height_mm", "thickness_mm"],
+                    "selector_roles": [],
+                },
+            },
+            {
+                "id": "mounting_holes",
+                "cdsl_feature_id": "hole_cut",
+                "role": "subtractive",
+                "purpose": "Four mounting holes",
+                "depends_on": ["base_plate"],
+                "cdsl_strategy": {
+                    "atomic_id": "extrude_cut_blind",
+                    "profile_type": "circle_grid",
+                    "parameter_roles": ["diameter_mm", "count_x", "count_y"],
+                    "selector_roles": [],
+                },
+            },
+            {
+                "id": "adjustment_slot",
+                "cdsl_feature_id": "slot_cut",
+                "role": "subtractive",
+                "purpose": "Center adjustment slot",
+                "depends_on": ["mounting_holes"],
+                "cdsl_strategy": {
+                    "atomic_id": "extrude_cut_blind",
+                    "profile_type": "obround",
+                    "parameter_roles": ["length_mm", "width_mm", "depth_mm"],
+                    "selector_roles": [],
+                },
+            },
+        ],
+        "feature_order": ["base_plate", "mounting_holes", "adjustment_slot"],
+        "assumptions": [],
+        "open_questions": [],
+        "capability_gaps": [],
+        "verification_expectations": [
+            {"type": "feature_count", "feature_id": "mounting_holes", "expected": 4},
+            {"type": "symmetry", "axis": "x"},
+            {"type": "bbox", "expected_mm": {"x": 100, "y": 60, "z": 10}},
+        ],
+        "status": "ready",
+    }
+
+
+def mounting_plate_cdsl() -> dict:
+    return {
+        "schema": "cad.cdsl.llm.v1",
+        "schema_version": "1.0",
+        "kind": "part",
+        "part_id": "mounting-plate",
+        "geometry": {
+            "sketches": [
+                {"id": "base_sketch", "workplane": workplane(), "profile": {"type": "rectangle", "center": [0, 0], "width_mm": 100, "height_mm": 60}},
+                {"id": "holes_sketch", "workplane": workplane(10), "profile": {"type": "circle_grid", "radius_mm": 3, "count_x": 2, "count_y": 2, "spacing_x_mm": 80, "spacing_y_mm": 40, "center_mm": [0, 0]}},
+                {"id": "slot_sketch", "workplane": workplane(10), "profile": {"type": "obround", "center": [0, 0], "length_mm": 32, "width_mm": 10}},
+            ],
+        },
+        "features": [
+            {"id": "base_add", "atomic_id": "extrude_add_blind", "depends_on": [], "sketch_id": "base_sketch", "params": {"distance_mm": 10}},
+            {"id": "hole_cut", "atomic_id": "extrude_cut_blind", "depends_on": ["base_add"], "sketch_id": "holes_sketch", "params": {"distance_mm": 10, "reverse": True}},
+            {"id": "slot_cut", "atomic_id": "extrude_cut_blind", "depends_on": ["hole_cut"], "sketch_id": "slot_sketch", "params": {"distance_mm": 10, "reverse": True}},
+        ],
+    }
+
+
+class DesignIntentValidationTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        sys.path.insert(0, str(ROOT / "backend" / "engine"))
+        import cdsl_engine
+
+        cls.engine = cdsl_engine
+
+    def assert_plan_error(self, intent: dict, code: str = "INVALID_DESIGN_INTENT") -> None:
+        with self.assertRaises(self.engine.DesignIntentError) as context:
+            self.engine.validate_design_intent(intent, self.engine)
+        self.assertEqual(context.exception.code, code)
+
+    def test_valid_mounting_plate_plan_and_cdsl_match(self) -> None:
+        intent = mounting_plate_intent()
+        validated = self.engine.validate_design_intent(intent, self.engine)
+
+        self.assertEqual(validated["feature_order"], ["base_plate", "mounting_holes", "adjustment_slot"])
+        self.engine.validate_intent_cdsl(validated, mounting_plate_cdsl(), self.engine)
+
+    def test_revise_requires_current_base_revision(self) -> None:
+        intent = mounting_plate_intent()
+        intent["mode"] = "revise"
+        intent["base_revision_id"] = ""
+        self.assert_plan_error(intent)
+
+        intent["base_revision_id"] = "rev_001"
+        self.engine.validate_design_intent(intent, self.engine, current_revision_id="rev_001")
+        with self.assertRaises(self.engine.DesignIntentError) as context:
+            self.engine.validate_design_intent(intent, self.engine, current_revision_id="rev_002")
+        self.assertEqual(context.exception.code, "INVALID_DESIGN_INTENT")
+
+    def test_rejects_duplicate_ids_bad_order_and_unregistered_capabilities(self) -> None:
+        duplicate = mounting_plate_intent()
+        duplicate["structures"][1]["id"] = "base_plate"
+        self.assert_plan_error(duplicate)
+
+        cyclic = mounting_plate_intent()
+        cyclic["structures"][0]["depends_on"] = ["mounting_holes"]
+        self.assert_plan_error(cyclic)
+
+        unsupported = mounting_plate_intent()
+        unsupported["structures"][0]["cdsl_strategy"]["atomic_id"] = "thread_add"
+        self.assert_plan_error(unsupported)
+
+        incomplete = mounting_plate_intent()
+        incomplete["feature_order"].pop()
+        self.assert_plan_error(incomplete)
+
+        no_profile = mounting_plate_intent()
+        no_profile["structures"][0]["cdsl_strategy"].pop("profile_type")
+        self.assert_plan_error(no_profile)
+
+        unknown_expectation = mounting_plate_intent()
+        unknown_expectation["verification_expectations"][0]["feature_id"] = "missing"
+        self.assert_plan_error(unknown_expectation)
+
+    def test_blockers_and_nonblocking_approximations_are_explicit(self) -> None:
+        clarification = mounting_plate_intent()
+        clarification["open_questions"] = [{"id": "thickness", "question": "What thickness is required?", "blocking": True}]
+        clarification["status"] = "needs_clarification"
+        self.engine.validate_design_intent(clarification, self.engine)
+        with self.assertRaises(self.engine.DesignIntentError) as context:
+            self.engine.validate_intent_cdsl(clarification, mounting_plate_cdsl(), self.engine)
+        self.assertEqual(context.exception.code, "DESIGN_INTENT_BLOCKED")
+
+        approximation = mounting_plate_intent()
+        approximation["capability_gaps"] = [{
+            "code": "unsupported_thread_geometry",
+            "structure_id": "mounting_holes",
+            "message": "Only a cylindrical bore is available.",
+            "blocking": False,
+        }]
+        self.assert_plan_error(approximation)
+        approximation["assumptions"] = ["Thread geometry is approximated by cylindrical bores."]
+        self.engine.validate_design_intent(approximation, self.engine)
+
+    def test_rejects_cdsl_feature_atomic_profile_and_selector_mismatches(self) -> None:
+        missing_feature = mounting_plate_cdsl()
+        missing_feature["features"].pop()
+        with self.assertRaises(self.engine.DesignIntentError) as context:
+            self.engine.validate_intent_cdsl(mounting_plate_intent(), missing_feature, self.engine)
+        self.assertEqual(context.exception.code, "INTENT_CDSL_MISMATCH")
+
+        atomic = mounting_plate_cdsl()
+        atomic["features"][1]["atomic_id"] = "extrude_add_blind"
+        with self.assertRaises(self.engine.DesignIntentError):
+            self.engine.validate_intent_cdsl(mounting_plate_intent(), atomic, self.engine)
+
+        profile = mounting_plate_cdsl()
+        profile["geometry"]["sketches"][1]["profile"]["type"] = "circles"
+        with self.assertRaises(self.engine.DesignIntentError):
+            self.engine.validate_intent_cdsl(mounting_plate_intent(), profile, self.engine)
+
+        selector_plan = copy.deepcopy(mounting_plate_intent())
+        selector_plan["structures"][2]["cdsl_strategy"]["selector_roles"] = ["host_face"]
+        with self.assertRaises(self.engine.DesignIntentError):
+            self.engine.validate_intent_cdsl(selector_plan, mounting_plate_cdsl(), self.engine)
@@ -0,0 +1,124 @@
+from __future__ import annotations
+
+import asyncio
+import json
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+sys.path.insert(0, str(ROOT / "backend"))
+
+from app.services.agent_service import AgentService  # noqa: E402
+from app.services.engine_service import load_engine  # noqa: E402
+from app.services.library import CdslLibrary  # noqa: E402
+from app.services.part_skills import PartSkillLibrary  # noqa: E402
+from app.services.storage import WorkspaceStore  # noqa: E402
+from app.settings import ProviderConfig, ProviderModel, Settings  # noqa: E402
+from tests.test_design_intent import mounting_plate_cdsl, mounting_plate_intent  # noqa: E402
+
+
+BACKEND = ROOT / "backend"
+PART_SKILL_ROOT = BACKEND / "agent" / "skills" / "cad-engine" / "references" / "part-skills"
+
+
+class DesignIntentFlowTests(unittest.TestCase):
+    def settings(self, root: Path) -> Settings:
+        provider = ProviderConfig("test", "Test", "https://example.invalid/v1", "test-key", (ProviderModel("test-model"),))
+        return Settings(
+            task_root=root / "tasks",
+            conversation_root=root / "conversations",
+            library_root=BACKEND / "cdsl_library",
+            engine_root=BACKEND / "engine" / "cdsl_engine",
+            llm_base_url=provider.base_url,
+            llm_api_key=provider.api_key,
+            llm_model="test-model",
+            llm_timeout_s=1,
+            default_provider_id="test",
+            providers=(provider,),
+        )
+
+    def test_design_intent_is_required_before_library_or_cdsl(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            settings = self.settings(Path(directory))
+            store = WorkspaceStore(settings)
+            agent = AgentService(settings, store, CdslLibrary(settings), PartSkillLibrary(PART_SKILL_ROOT))
+            state = {"phase": "WAITING_FOR_INTENT", "design_intent_id": ""}
+            searched, _ = asyncio.run(agent._run_tool("search_cdsl_library", {"query": "mounting plate"}, "", "mounting plate", [], intent_state=state))
+            generated, _ = asyncio.run(agent._run_tool("generate_cdsl_model", {"design_intent_id": "intent_aaaaaaaaaaaa", "cdsl": {}, "summary": "x", "assumptions": []}, "", "mounting plate", [], intent_state=state))
+
+            self.assertEqual(searched["code"], "DESIGN_INTENT_REQUIRED")
+            self.assertEqual(generated["code"], "DESIGN_INTENT_REQUIRED")
+            self.assertEqual(list(settings.task_root.glob("cad_*")), [])
+
+    def test_ready_plan_persists_before_build_and_links_success_revision(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            settings = self.settings(Path(directory))
+            store = WorkspaceStore(settings)
+            skills = PartSkillLibrary(PART_SKILL_ROOT)
+            agent = AgentService(settings, store, CdslLibrary(settings), skills)
+            request = "Create a mounting plate with four holes and a center slot"
+            state = {"phase": "WAITING_FOR_INTENT", "design_intent_id": ""}
+            planned, _ = asyncio.run(agent._run_tool(
+                "propose_design_intent",
+                {"intent": mounting_plate_intent(), "summary": "plate plan", "assumptions": []},
+                "", request, [], part_skill_selection=skills.select(request), intent_state=state,
+            ))
+
+            self.assertTrue(planned["ok"])
+            task = store.read_task(planned["task_id"])
+            self.assertEqual(task["current_revision"], "")
+            planning_path = store.artifact_path(planned["task_id"], planned["design_intent_path"])
+            self.assertTrue(planning_path.is_file())
+            saved = json.loads(planning_path.read_text(encoding="utf-8"))
+            self.assertEqual(saved["part_skill_ids"], skills.select(request)["skill_ids"])
+
+            searched, _ = asyncio.run(agent._run_tool("search_cdsl_library", {"query": "plate"}, planned["task_id"], request, [], intent_state=state))
+            self.assertTrue(searched["ok"])
+            result, built = asyncio.run(agent._run_tool(
+                "generate_cdsl_model",
+                {"design_intent_id": planned["design_intent_id"], "cdsl": mounting_plate_cdsl(), "summary": "plate", "assumptions": []},
+                planned["task_id"], request, [], part_skill_selection=skills.select(request), intent_state=state,
+            ))
+
+            self.assertTrue(result["ok"])
+            self.assertIsNotNone(built)
+            revision = store.read_task(planned["task_id"])["revisions"][-1]
+            self.assertEqual(revision["design_intent_id"], planned["design_intent_id"])
+            self.assertEqual(revision["design_intent_path"], planned["design_intent_path"])
+            audit = json.loads(store.artifact_path(planned["task_id"], revision["part_skills_path"]).read_text(encoding="utf-8"))
+            self.assertEqual(audit["design_intent_id"], planned["design_intent_id"])
+            self.assertEqual(audit["design_intent_assumptions"], [])
+
+    def test_blocked_plan_is_persisted_without_a_revision_and_new_plan_supersedes_it(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            settings = self.settings(Path(directory))
+            store = WorkspaceStore(settings)
+            skills = PartSkillLibrary(PART_SKILL_ROOT)
+            agent = AgentService(settings, store, CdslLibrary(settings), skills)
+            request = "Create a mounting plate"
+            state = {"phase": "WAITING_FOR_INTENT", "design_intent_id": ""}
+            blocked_intent = mounting_plate_intent()
+            blocked_intent["open_questions"] = [{"id": "thickness", "question": "Thickness?", "blocking": True}]
+            blocked_intent["status"] = "needs_clarification"
+            blocked, _ = asyncio.run(agent._run_tool(
+                "propose_design_intent",
+                {"intent": blocked_intent, "summary": "blocked", "assumptions": []},
+                "", request, [], part_skill_selection=skills.select(request), intent_state=state,
+            ))
+            self.assertEqual(blocked["code"], "DESIGN_INTENT_BLOCKED")
+            task = store.read_task(blocked["task_id"])
+            self.assertEqual(task["revisions"], [])
+            self.assertEqual(task["design_intents"][0]["status"], "pending")
+
+            ready, _ = asyncio.run(agent._run_tool(
+                "propose_design_intent",
+                {"intent": mounting_plate_intent(), "summary": "ready", "assumptions": []},
+                blocked["task_id"], request, [], part_skill_selection=skills.select(request), intent_state=state,
+            ))
+            self.assertTrue(ready["ok"])
+            task = store.read_task(blocked["task_id"])
+            self.assertEqual(task["design_intents"][0]["status"], "superseded")
+            self.assertEqual(task["design_intents"][-1]["status"], "accepted")
@@ -1,6 +1,8 @@
 from __future__ import annotations

 import sys
+import json
+import tempfile
 import unittest
 from copy import deepcopy
 from pathlib import Path
@@ -9,7 +11,7 @@ from pathlib import Path
 ROOT = Path(__file__).resolve().parents[2]
 sys.path.insert(0, str(ROOT / "json_to_cdsl"))

-from evidence_v2_to_cdsl import StepInspector, convert_evidence
+from evidence_v2_to_cdsl import StepInspector, batch_convert, convert_evidence


 def _identity(stable_id: str, *, kind: str = "feature", geometry: dict | None = None) -> dict:
@@ -59,6 +61,42 @@ FIXTURE = {


 class EvidenceV2ToCdslTests(unittest.TestCase):
+    def test_batch_conversion_recurses_and_records_relative_source_path(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary_directory:
+            root = Path(temporary_directory)
+            evidence_dir = root / "evidence"
+            source = evidence_dir / "category" / "part.solidworks_evidence_v2.json"
+            source.parent.mkdir(parents=True)
+            source.write_text(json.dumps(FIXTURE), encoding="utf-8")
+
+            output_dir = root / "output"
+            manifest = batch_convert(evidence_dir, output_dir)
+
+            self.assertEqual(manifest["input_count"], 1)
+            self.assertEqual(manifest["converted_count"], 1)
+            self.assertEqual(manifest["results"][0]["source"], "category/part.solidworks_evidence_v2.json")
+            diagnostic = json.loads((output_dir / "part.diagnostic.json").read_text(encoding="utf-8"))
+            self.assertEqual(diagnostic["source"], "category/part.solidworks_evidence_v2.json")
+
+    def test_batch_conversion_uses_full_filename_and_disambiguates_normalized_ids(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary_directory:
+            root = Path(temporary_directory)
+            evidence_dir = root / "evidence"
+            sources = [
+                evidence_dir / "first" / "14.Rod Nut.solidworks_evidence_v2.json",
+                evidence_dir / "second" / "14 Rod Nut.solidworks_evidence_v2.json",
+            ]
+            for source in sources:
+                source.parent.mkdir(parents=True, exist_ok=True)
+                source.write_text(json.dumps(FIXTURE), encoding="utf-8")
+
+            manifest = batch_convert(evidence_dir, root / "output")
+
+            self.assertEqual(manifest["converted_count"], 2)
+            part_ids = {item["part_id"] for item in manifest["results"]}
+            self.assertEqual(len(part_ids), 2)
+            self.assertTrue(all(part_id.startswith("14-Rod-Nut-") for part_id in part_ids))
+
    def test_converts_fixed_evidence_v2_fixture_to_semantic_cdsl(self) -> None:
        cdsl, diagnostic = convert_evidence(FIXTURE, source_name="fixture.solidworks_evidence_v2.json")
        atoms = {feature["atomic_id"] for feature in cdsl["features"]}
@@ -0,0 +1,345 @@
+from __future__ import annotations
+
+import asyncio
+import copy
+import json
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+sys.path.insert(0, str(ROOT / "backend"))
+
+from app.models.contracts import ChatMessage, MessagePart  # noqa: E402
+from app.services.agent_service import AgentService, TOOL_SCHEMAS, system_prompt  # noqa: E402
+from app.services.engine_service import build_revision, load_engine, validate_cdsl  # noqa: E402
+from app.services.library import CdslLibrary  # noqa: E402
+from app.services.part_skills import PartSkillLibrary  # noqa: E402
+from app.services.storage import WorkspaceStore  # noqa: E402
+from app.settings import ProviderConfig, ProviderModel, Settings  # noqa: E402
+
+
+BACKEND = ROOT / "backend"
+PART_SKILL_ROOT = BACKEND / "agent" / "skills" / "cad-engine" / "references" / "part-skills"
+
+
+def workplane(z: float = 0.0) -> dict[str, list[float]]:
+    return {
+        "origin_mm": [0.0, 0.0, z],
+        "x_dir": [1.0, 0.0, 0.0],
+        "y_dir": [0.0, 1.0, 0.0],
+        "normal": [0.0, 0.0, 1.0],
+    }
+
+
+def document(part_id: str, sketches: list[dict], features: list[dict]) -> dict:
+    return {
+        "schema": "cad.cdsl.llm.v1",
+        "schema_version": "1.1.0",
+        "kind": "part",
+        "part_id": part_id,
+        "meta": {"unit": "mm"},
+        "geometry": {"sketches": sketches},
+        "features": features,
+    }
+
+
+def mounting_plate_fixture() -> dict:
+    return document("golden-mounting-plate", [
+        {"id": "base", "workplane": workplane(), "profile": {"type": "rectangle", "center": [0, 0], "width_mm": 80, "height_mm": 60}},
+        {"id": "grid", "workplane": workplane(10), "profile": {"type": "circle_grid", "radius_mm": 3, "count_x": 2, "count_y": 2, "spacing_x_mm": 50, "spacing_y_mm": 30, "center_mm": [0, 0]}},
+    ], [
+        {"id": "base_add", "atomic_id": "extrude_add_blind", "depends_on": [], "params": {"distance_mm": 10}, "sketch_id": "base"},
+        {"id": "mount_pattern", "atomic_id": "extrude_cut_blind", "depends_on": ["base_add"], "params": {"distance_mm": 10, "reverse": True}, "sketch_id": "grid"},
+        {"id": "counterbores", "atomic_id": "hole_counterbore", "depends_on": ["mount_pattern"], "params": {"diameter_mm": 6, "depth_mm": 10, "counterbore_diameter_mm": 12, "counterbore_depth_mm": 4, "positions": [{"mm": [-15, 0, 0]}, {"mm": [15, 0, 0]}], "host_face": {"frame": workplane(10)}}, "sketch_id": "base"},
+    ])
+
+
+def mounting_bracket_fixture() -> dict:
+    web_plane = {"origin_mm": [0, -20, 0], "x_dir": [1, 0, 0], "y_dir": [0, 0, -1], "normal": [0, 1, 0]}
+    return document("golden-mounting-bracket", [
+        {"id": "base", "workplane": workplane(), "profile": {"type": "rectangle", "center": [0, 0], "width_mm": 80, "height_mm": 40}},
+        {"id": "web", "workplane": web_plane, "profile": {"type": "rectangle", "center": [0, -15], "width_mm": 50, "height_mm": 30}},
+        {"id": "slot", "workplane": workplane(6), "profile": {"type": "obround", "center": [0, 0], "length_mm": 24, "width_mm": 8}},
+        {"id": "symmetric_holes", "workplane": workplane(6), "profile": {"type": "circles", "items": [{"center": [-25, 0], "radius_mm": 3}, {"center": [25, 0], "radius_mm": 3}]}},
+    ], [
+        {"id": "base_add", "atomic_id": "extrude_add_blind", "depends_on": [], "params": {"distance_mm": 6}, "sketch_id": "base"},
+        {"id": "web_add", "atomic_id": "extrude_add_blind", "depends_on": ["base_add"], "params": {"distance_mm": 6}, "sketch_id": "web"},
+        {"id": "slot_cut", "atomic_id": "extrude_cut_blind", "depends_on": ["web_add"], "params": {"distance_mm": 6, "reverse": True}, "sketch_id": "slot"},
+        {"id": "symmetric_cut", "atomic_id": "extrude_cut_blind", "depends_on": ["slot_cut"], "params": {"distance_mm": 6, "reverse": True}, "sketch_id": "symmetric_holes"},
+    ])
+
+
+def flange_fixture() -> dict:
+    return document("golden-flange", [
+        {"id": "base", "workplane": workplane(), "profile": {"type": "annulus", "inner_radius_mm": 10, "outer_radius_mm": 40}},
+        {"id": "bolt_circle", "workplane": workplane(12), "profile": {"type": "circles", "items": [{"center": [25, 0], "radius_mm": 3}, {"center": [0, 25], "radius_mm": 3}, {"center": [-25, 0], "radius_mm": 3}, {"center": [0, -25], "radius_mm": 3}]}},
+    ], [
+        {"id": "base_add", "atomic_id": "extrude_add_blind", "depends_on": [], "params": {"distance_mm": 12}, "sketch_id": "base"},
+        {"id": "bolt_holes", "atomic_id": "extrude_cut_blind", "depends_on": ["base_add"], "params": {"distance_mm": 12, "reverse": True}, "sketch_id": "bolt_circle"},
+    ])
+
+
+def shaft_fixture() -> dict:
+    end_plane = {"origin_mm": [0, 35, 0], "x_dir": [1, 0, 0], "y_dir": [0, 0, -1], "normal": [0, 1, 0]}
+    return document("golden-stepped-shaft", [
+        {"id": "shaft_profile", "workplane": workplane(), "profile": {"type": "polygon", "vertices": [[0, 0], [10, 0], [10, 15], [7, 15], [7, 35], [0, 35]]}},
+    ], [
+        {"id": "shaft_add", "atomic_id": "revolve_add", "depends_on": [], "params": {"angle_deg": 360, "axis": {"origin_mm": [0, 0, 0], "direction": [0, 1, 0]}}, "sketch_id": "shaft_profile"},
+        {"id": "coaxial_bore", "atomic_id": "hole_blind", "depends_on": ["shaft_add"], "params": {"diameter_mm": 4, "depth_mm": 35, "positions": [{"mm": [0, 0, 0]}], "host_face": {"frame": end_plane}}, "sketch_id": "shaft_profile"},
+    ])
+
+
+def bearing_housing_fixture() -> dict:
+    return document("golden-bearing-housing", [
+        {"id": "base", "workplane": workplane(), "profile": {"type": "rectangle", "center": [0, 0], "width_mm": 100, "height_mm": 60}},
+        {"id": "housing", "workplane": workplane(8), "profile": {"type": "circle", "radius_mm": 28}},
+        {"id": "base_holes", "workplane": workplane(8), "profile": {"type": "circle_grid", "radius_mm": 4, "count_x": 2, "count_y": 2, "spacing_x_mm": 80, "spacing_y_mm": 40, "center_mm": [0, 0]}},
+    ], [
+        {"id": "base_add", "atomic_id": "extrude_add_blind", "depends_on": [], "params": {"distance_mm": 8}, "sketch_id": "base"},
+        {"id": "housing_add", "atomic_id": "extrude_add_blind", "depends_on": ["base_add"], "params": {"distance_mm": 25}, "sketch_id": "housing"},
+        {"id": "bearing_seat", "atomic_id": "hole_counterbore", "depends_on": ["housing_add"], "params": {"diameter_mm": 12, "depth_mm": 25, "counterbore_diameter_mm": 30, "counterbore_depth_mm": 10, "positions": [{"mm": [0, 0, 0]}], "host_face": {"frame": workplane(33)}}, "sketch_id": "housing"},
+        {"id": "base_mount_holes", "atomic_id": "extrude_cut_blind", "depends_on": ["bearing_seat"], "params": {"distance_mm": 8, "reverse": True}, "sketch_id": "base_holes"},
+    ])
+
+
+def hex_nut_fixture() -> dict:
+    return document("golden-hex-nut", [
+        {"id": "hex", "workplane": workplane(), "profile": {"type": "polygon", "vertices": [[10, 0], [5, 8.660254], [-5, 8.660254], [-10, 0], [-5, -8.660254], [5, -8.660254]]}},
+        {"id": "thread_bore", "workplane": workplane(10), "profile": {"type": "circle", "radius_mm": 3}},
+    ], [
+        {"id": "nut_add", "atomic_id": "extrude_add_blind", "depends_on": [], "params": {"distance_mm": 10}, "sketch_id": "hex"},
+        {"id": "m6_bore", "atomic_id": "extrude_cut_blind", "depends_on": ["nut_add"], "params": {"distance_mm": 10, "reverse": True}, "sketch_id": "thread_bore"},
+    ])
+
+
+GOLDEN_CASES = (
+    ("带沉孔和孔阵列的安装底板", mounting_plate_fixture, {"planning/mounting-plate", "atomic/counterbored-hole-creation", "atomic/pattern-holes-from-datum"}, {"atomic/pattern-holes-from-datum": "expanded"}),
+    ("带槽和对称孔的安装支架", mounting_bracket_fixture, {"planning/mounting-bracket", "functional/slotted-adjustment-feature", "functional/symmetric-feature-layout"}, {"atomic/pattern-holes-from-datum": "expanded"}),
+    ("带螺栓圆的法兰", flange_fixture, {"planning/flange", "functional/flange-bolt-circle"}, {"functional/flange-bolt-circle": "expanded"}),
+    ("带回转体同轴孔的阶梯轴", shaft_fixture, {"planning/simple-shaft", "functional/axisymmetric-revolve-strategy", "atomic/coaxial-bore-rule"}, {}),
+    ("带轴承座孔和底座孔的轴承座", bearing_housing_fixture, {"planning/bearing-housing", "functional/bearing-bore-seat"}, {}),
+    ("M6 六角螺母", hex_nut_fixture, {"planning/hexagonal-nut", "atomic/threaded-hole-creation"}, {"atomic/threaded-hole-creation": "approximated"}),
+)
+
+
+class PartSkillLibraryTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.library = PartSkillLibrary(PART_SKILL_ROOT)
+
+    def test_english_and_chinese_triggers(self) -> None:
+        english = self.library.select("Create a mounting plate with counterbored hole pattern")
+        chinese = self.library.select("带沉孔和孔阵列的安装底板")
+
+        self.assertIn("planning/mounting-plate", english["skill_ids"])
+        self.assertIn("planning/mounting-plate", chinese["skill_ids"])
+        self.assertIn("atomic/counterbored-hole-creation", chinese["skill_ids"])
+
+    def test_exclusions_and_selection_limits(self) -> None:
+        selection = self.library.select("Create a flange nut with an M6 threaded hole")
+
+        self.assertNotIn("planning/flange", selection["skill_ids"])
+        self.assertLessEqual(len(selection["planning_ids"]), 1)
+        self.assertLessEqual(len(selection["support_ids"]), 3)
+        self.assertEqual(len(selection["skill_ids"]), len(set(selection["skill_ids"])))
+
+    def test_inheritance_and_primary_family_conflict(self) -> None:
+        inherited = ["planning/mounting-plate", "atomic/counterbored-hole-creation"]
+        addition = self.library.select("Add one M6 threaded hole", inherited)
+        conflict = self.library.select("Add a flange bolt circle", inherited)
+        replacement = self.library.select("Replace the whole part with a flange bolt circle", inherited)
+
+        self.assertIn("planning/mounting-plate", addition["skill_ids"])
+        self.assertIn("atomic/threaded-hole-creation", addition["skill_ids"])
+        self.assertEqual(conflict["conflict"]["current"], "planning/mounting-plate")
+        self.assertEqual(conflict["conflict"]["matched"], "planning/flange")
+        self.assertEqual(replacement["planning_ids"], ["planning/flange"])
+        self.assertIsNone(replacement["conflict"])
+
+    def test_catalog_and_bridge_files_are_complete(self) -> None:
+        payload = json.loads((PART_SKILL_ROOT / "catalog.json").read_text(encoding="utf-8"))
+        categories = {kind: 0 for kind in ("planning", "functional", "atomic")}
+        for skill in payload["skills"]:
+            categories[skill["kind"]] += 1
+            self.assertTrue((PART_SKILL_ROOT / skill["bridge"]).is_file())
+            self.assertTrue((PART_SKILL_ROOT / skill["source"]).is_file())
+            self.assertTrue(skill["triggers"])
+            self.assertTrue(skill["capability_translation_rules"])
+        self.assertEqual(categories, {"planning": 6, "functional": 7, "atomic": 8})
+        self.assertTrue((PART_SKILL_ROOT / "LICENSE").is_file())
+        self.assertTrue((PART_SKILL_ROOT / "PROVENANCE.md").is_file())
+
+    def test_audit_records_exact_omitted_and_blocked_capability_states(self) -> None:
+        fixture = mounting_plate_fixture()
+        exact = self.library.audit(self.library.select("安装底板"), fixture)
+        finishing = self.library.audit(self.library.select("edge treatment"), fixture)
+        blocked = self.library.audit(self.library.select("flange bolt circle"), mounting_plate_fixture())
+
+        exact_statuses = {item["skill_id"]: item["status"] for item in exact["capability_translations"]}
+        finishing_statuses = {item["skill_id"]: item for item in finishing["capability_translations"]}
+        blocked_statuses = {item["skill_id"]: item["status"] for item in blocked["capability_translations"]}
+        self.assertEqual(exact_statuses["planning/mounting-plate"], "exact")
+        self.assertEqual(finishing_statuses["atomic/fillet-chamfer-last"]["status"], "omitted")
+        self.assertEqual(finishing_statuses["atomic/fillet-chamfer-last"]["translation"], "selector_unavailable")
+        self.assertEqual(blocked_statuses["functional/flange-bolt-circle"], "blocked")
+
+
+class AgentPartSkillTests(unittest.TestCase):
+    def test_agent_stream_selects_and_injects_part_skill_before_first_model_call(self) -> None:
+        class CaptureAgent(AgentService):
+            def __init__(self, *args: object, **kwargs: object) -> None:
+                super().__init__(*args, **kwargs)
+                self.first_messages: list[dict[str, object]] = []
+
+            async def _complete(self, messages: list[dict[str, object]], *args: object, **kwargs: object) -> dict[str, object]:
+                self.first_messages = [dict(message) for message in messages]
+                return {"choices": [{"message": {"role": "assistant", "content": "已分析", "tool_calls": []}}]}
+
+        with tempfile.TemporaryDirectory() as directory:
+            settings = self._settings(Path(directory))
+            library = PartSkillLibrary(PART_SKILL_ROOT)
+            agent = CaptureAgent(settings, WorkspaceStore(settings), CdslLibrary(settings), library)
+            message = ChatMessage(id="user_1", role="user", parts=[MessagePart(type="text", text="生成一个法兰螺栓圆")])
+
+            async def consume() -> None:
+                async for _ in agent.stream([message], None, None):
+                    pass
+
+            asyncio.run(consume())
+            self.assertIn("[planning/flange]", str(agent.first_messages[0]["content"]))
+            self.assertIn("[functional/flange-bolt-circle]", str(agent.first_messages[0]["content"]))
+
+    def test_prompt_contains_bridge_without_adding_tools(self) -> None:
+        library = PartSkillLibrary(PART_SKILL_ROOT)
+        selection = library.select("Create a flange with a bolt circle")
+        with tempfile.TemporaryDirectory() as directory:
+            settings = self._settings(Path(directory))
+            prompt = system_prompt(settings, "Create a flange with a bolt circle", part_skill_context=library.render_context(selection))
+
+        self.assertIn("[planning/flange]", prompt)
+        self.assertIn("circular-pattern atomic", prompt)
+        self.assertEqual([tool["function"]["name"] for tool in TOOL_SCHEMAS], ["search_cdsl_library", "read_cdsl_reference", "propose_design_intent", "read_current_cdsl", "generate_cdsl_model"])
+
+    def test_generation_persists_assumptions_and_selected_skills(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            settings = self._settings(Path(directory))
+            store = WorkspaceStore(settings)
+            library = PartSkillLibrary(PART_SKILL_ROOT)
+            agent = AgentService(settings, store, CdslLibrary(settings), library)
+            request = "M6 六角螺母"
+            selection = library.select(request)
+            engine = load_engine(settings)
+            intent = engine.design_intent_from_cdsl(hex_nut_fixture(), request=request)
+            intent_state = {"phase": "WAITING_FOR_INTENT", "design_intent_id": ""}
+            planned, _ = asyncio.run(agent._run_tool(
+                "propose_design_intent",
+                {"intent": intent, "summary": "M6 nut plan", "assumptions": []},
+                "",
+                request,
+                [],
+                part_skill_selection=selection,
+                intent_state=intent_state,
+            ))
+            self.assertTrue(planned["ok"])
+            result, generated = asyncio.run(agent._run_tool(
+                "generate_cdsl_model",
+                {"design_intent_id": planned["design_intent_id"], "cdsl": hex_nut_fixture(), "summary": "M6 nut", "assumptions": ["M6 thread is represented as a cylindrical bore"]},
+                planned["task_id"],
+                request,
+                ["reference-fixture"],
+                part_skill_selection=selection,
+                intent_state=intent_state,
+            ))
+
+            self.assertTrue(result["ok"])
+            self.assertIsNotNone(generated)
+            task = store.read_task(str(generated["task_id"]))
+            revision = task["revisions"][0]
+            audit = json.loads(store.artifact_path(task["task_id"], revision["part_skills_path"]).read_text(encoding="utf-8"))
+            report = json.loads(store.artifact_path(task["task_id"], revision["report_path"]).read_text(encoding="utf-8"))
+            self.assertIn("M6 thread is represented as a cylindrical bore", audit["assumptions"])
+            self.assertIn("atomic/threaded-hole-creation", revision["part_skill_ids"])
+            self.assertEqual(report["generation_context"]["cdsl_reference_ids"], ["reference-fixture"])
+
+    @staticmethod
+    def _settings(root: Path) -> Settings:
+        provider = ProviderConfig("test", "Test", "https://example.invalid/v1", "test-key", (ProviderModel("test-model"),))
+        return Settings(
+            task_root=root / "tasks",
+            conversation_root=root / "conversations",
+            library_root=BACKEND / "cdsl_library",
+            engine_root=BACKEND / "engine" / "cdsl_engine",
+            llm_base_url=provider.base_url,
+            llm_api_key=provider.api_key,
+            llm_model="test-model",
+            llm_timeout_s=1,
+            default_provider_id="test",
+            providers=(provider,),
+        )
+
+
+class PartSkillBuildAndGoldenTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        cls.settings = AgentPartSkillTests._settings(Path(tempfile.mkdtemp()))
+        cls.engine = load_engine(cls.settings)
+        cls.library = PartSkillLibrary(PART_SKILL_ROOT)
+
+    def test_success_and_failure_revisions_always_write_part_skill_audit(self) -> None:
+        with tempfile.TemporaryDirectory() as directory:
+            settings = AgentPartSkillTests._settings(Path(directory))
+            store = WorkspaceStore(settings)
+            selection = self.library.select("带螺栓圆的法兰")
+            audit = self.library.audit(selection, flange_fixture(), ["Explicit circle expansion"])
+            success = build_revision(
+                settings=settings, store=store, task_id=None, request="带螺栓圆的法兰", cdsl=flange_fixture(),
+                reference_ids=["flange-reference"], summary="flange", part_skills=audit,
+                generation_assumptions=["Explicit circle expansion"],
+            )
+            success_audit = json.loads(store.artifact_path(success["task_id"], success["part_skills_path"]).read_text(encoding="utf-8"))
+            success_report = json.loads(store.artifact_path(success["task_id"], success["report_path"]).read_text(encoding="utf-8"))
+            self.assertEqual(success_audit["skill_ids"], audit["skill_ids"])
+            self.assertIn("generation_context", success_report)
+
+            invalid = copy.deepcopy(flange_fixture())
+            invalid["features"][0]["atomic_id"] = "not_supported"
+            failed_audit = self.library.audit(selection, invalid, [])
+            with self.assertRaisesRegex(ValueError, "CDSL schema violation"):
+                build_revision(
+                    settings=settings, store=store, task_id=success["task_id"], request="bad flange", cdsl=invalid,
+                    reference_ids=[], summary="bad", part_skills=failed_audit, generation_assumptions=[],
+                )
+            task = store.read_task(success["task_id"])
+            failed = task["revisions"][-1]
+            self.assertEqual(failed["status"], "failed")
+            self.assertTrue(store.artifact_path(task["task_id"], failed["part_skills_path"]).is_file())
+            report = json.loads(store.artifact_path(task["task_id"], failed["report_path"]).read_text(encoding="utf-8"))
+            self.assertEqual(report["generation_context"]["part_skill_ids"], audit["skill_ids"])
+            legacy_report = {"engine_result": {"engine": "cdsl_only"}}
+            self.assertEqual(legacy_report.get("generation_context", {}), {})
+
+    def test_golden_part_families_validate_preflight_rebuild_and_audit(self) -> None:
+        for request, factory, expected_skills, expected_statuses in GOLDEN_CASES:
+            with self.subTest(request=request):
+                cdsl = factory()
+                selection = self.library.select(request)
+                self.assertTrue(expected_skills.issubset(selection["skill_ids"]))
+                validate_cdsl(cdsl, self.engine)
+                with tempfile.TemporaryDirectory() as directory:
+                    step_path = Path(directory) / "model.step"
+                    result = self.engine.run_cdsl_only(copy.deepcopy(cdsl), step_path)
+                    self.assertEqual(result["engine"], "cdsl_only")
+                    self.assertTrue(step_path.is_file())
+                    self.assertGreater(step_path.stat().st_size, 0)
+                audit = self.library.audit(selection, cdsl, ["golden fixture"])
+                statuses = {item["skill_id"]: item["status"] for item in audit["capability_translations"]}
+                for skill_id, status in expected_statuses.items():
+                    self.assertEqual(statuses[skill_id], status)
+                self.assertTrue(audit["evidence"]["features"])
+                self.assertTrue(audit["evidence"]["profiles"])
+
+
+if __name__ == "__main__":
+    unittest.main()
@@ -25,12 +25,13 @@ export function CadProgressPart({ data }: { data: CadProgress }) {
 }

 export function CadResultPart({ data }: { data: CadResult }) {
-  const downloads = [
+  const downloads: Array<[string, string]> = [
    ["STEP", data.stepPath],
    ["CDSL", data.cdslPath],
    ["GLB", data.glbPath],
    ["REPORT", data.reportPath],
-  ] as const;
+  ];
+  if (data.designIntentPath) downloads.push(["DESIGN INTENT", data.designIntentPath]);
  return (
    <div className="cad-card cad-result-card">
      <div className="cad-card-icon success">
@@ -51,6 +51,8 @@ function resultFromBackend(payload: Record<string, unknown>): CadResult {
    parametersPath: typeof payload.parameters_path === "string" ? payload.parameters_path : undefined,
    selectorPath: typeof payload.selector_path === "string" ? payload.selector_path : undefined,
    edgesPath: typeof payload.edges_path === "string" ? payload.edges_path : undefined,
+    designIntentId: typeof payload.design_intent_id === "string" ? payload.design_intent_id : undefined,
+    designIntentPath: typeof payload.design_intent_path === "string" ? payload.design_intent_path : undefined,
    summary: String(payload.summary || "Updated CDSL model"),
    referenceIds: Array.isArray(payload.reference_ids) ? payload.reference_ids.map(String) : [],
    engine: String(payload.engine || "cdsl_only"),
@@ -31,6 +31,8 @@ export function latestSuccessfulResult(task: TaskRecord | null): CadResult | nul
    parametersPath: current.parameters_path,
    selectorPath: current.selector_path,
    edgesPath: current.edges_path,
+    designIntentId: current.design_intent_id,
+    designIntentPath: current.design_intent_path,
    summary: current.summary || "CDSL CAD model",
    referenceIds: current.reference_ids || [],
    engine: current.engine || "cdsl_only",
@@ -17,6 +17,8 @@ export type CadResult = {
  parametersPath?: string;
  selectorPath?: string;
  edgesPath?: string;
+  designIntentId?: string;
+  designIntentPath?: string;
  summary: string;
  referenceIds: string[];
  engine: string;
@@ -64,6 +66,8 @@ export type TaskRevision = {
  parameters_path?: string;
  selector_path?: string;
  edges_path?: string;
+  design_intent_id?: string;
+  design_intent_path?: string;
  summary?: string;
  reference_ids?: string[];
  engine?: string;
@@ -73,6 +77,7 @@ export type TaskRevision = {
 export type TaskRecord = {
  task_id: string;
  current_revision: string;
+  current_design_intent_id?: string;
  revisions: TaskRevision[];
 };

@@ -24,8 +24,8 @@ implementation are emitted with `execution_status: "deferred"` instead.

 ```bash
 PYTHONPATH=backend/engine python json_to_cdsl/evidence_v2_to_cdsl.py \
-  /path/to/evidence_v2 \
-  --truth-dir /path/to/evidence_v2/truth \
+  json_to_cdsl/input/evidence_v2 \
+  --truth-dir json_to_cdsl/input/evidence_v2/truth \
  --out json_to_cdsl/output \
  --workers 1
 ```
@@ -41,3 +41,9 @@ For every `*.solidworks_evidence_v2.json` input it writes:
 The optional STEP directory is used only to infer a host face when exactly one
 candidate is compatible with a Hole Wizard's captured locations. Ambiguous
 geometry stays in `unresolved`; the converter never invents a selector.
+
+Source records are discovered recursively. Output remains flat and is named by
+the normalized full source filename. Files that normalize to the same part ID
+receive a deterministic relative-path hash suffix, so every input record maps
+to a distinct output. When a matching STEP file exists, it is resolved through
+the same relative subdirectory as its source record.
@@ -32,6 +32,7 @@ from cdsl_engine.semantic_validation import validate_semantic_cdsl  # noqa: E402

 METERS_TO_MM = 1000.0
 EPSILON_MM = 1e-4
+EVIDENCE_V2_SUFFIX = ".solidworks_evidence_v2.json"
 SUPPORTED_ATOMS = {
    "extrude_add_blind",
    "extrude_add_two_sided",
@@ -870,7 +871,17 @@ def _topologically_order_features(features: list[dict[str, Any]]) -> list[dict[s
    return ordered


-def convert_evidence(evidence: dict[str, Any], *, source_name: str, step_path: Path | None = None) -> tuple[dict[str, Any], dict[str, Any]]:
+def _part_id_from_source_name(source_name: str) -> str:
+    """Build a schema-valid ID from the entire evidence file name."""
+    stem = Path(source_name).name.removesuffix(EVIDENCE_V2_SUFFIX)
+    part_id = re.sub(r"[^A-Za-z0-9_-]+", "-", stem).strip("-")
+    if len(part_id) < 3:
+        part_id = f"part-{part_id}".rstrip("-")
+    return part_id[:80]
+
+
+def convert_evidence(evidence: dict[str, Any], *, source_name: str, step_path: Path | None = None,
+                     part_id: str | None = None) -> tuple[dict[str, Any], dict[str, Any]]:
    if evidence.get("schema") != "solidworks.cad_evidence.v2":
        raise ValueError("Expected schema solidworks.cad_evidence.v2")
    features = sorted((item for item in evidence.get("features") or [] if isinstance(item, dict)), key=lambda item: int(_number(item.get("sequence"))))
@@ -1105,7 +1116,7 @@ def convert_evidence(evidence: dict[str, Any], *, source_name: str, step_path: P
        })
    cdsl_features = _topologically_order_features(cdsl_features)

-    part_id = re.sub(r"[^A-Za-z0-9_-]+", "-", Path(source_name).name.split(".")[0]).strip("-") or "part"
+    part_id = part_id or _part_id_from_source_name(source_name)
    truth = evidence.get("document_truth") or {}
    step_summary = step.summary(truth)
    cdsl = {
@@ -1133,34 +1144,56 @@ def _write_json(path: Path, value: Any) -> None:
    path.write_text(json.dumps(value, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")


-def _convert_path(source: Path, output_dir: Path, truth_dir: Path | None, overwrite: bool) -> dict[str, Any]:
-    part_id = source.name.split(".")[0]
+def _convert_path(source: Path, output_dir: Path, truth_dir: Path | None, overwrite: bool,
+                  source_name: str, truth_relative_path: Path, part_id: str) -> dict[str, Any]:
    cdsl_path = output_dir / f"{part_id}.cdsl.json"
    diagnostic_path = output_dir / f"{part_id}.diagnostic.json"
    if not overwrite and cdsl_path.exists() and diagnostic_path.exists():
-        return {"part_id": part_id, "status": "skipped", "cdsl": cdsl_path.name, "diagnostic": diagnostic_path.name}
+        return {
+            "part_id": part_id, "source": source_name, "status": "skipped",
+            "cdsl": cdsl_path.name, "diagnostic": diagnostic_path.name,
+        }
    try:
        evidence = json.loads(source.read_text(encoding="utf-8"))
-        step_path = (truth_dir / f"{part_id}.step") if truth_dir else None
-        cdsl, diagnostic = convert_evidence(evidence, source_name=source.name, step_path=step_path)
+        step_path = (truth_dir / truth_relative_path) if truth_dir else None
+        cdsl, diagnostic = convert_evidence(evidence, source_name=source_name, step_path=step_path, part_id=part_id)
        _write_json(cdsl_path, cdsl)
        _write_json(diagnostic_path, diagnostic)
-        return {"part_id": part_id, "status": "converted", "cdsl": cdsl_path.name, "diagnostic": diagnostic_path.name,
+        return {"part_id": part_id, "source": source_name, "status": "converted", "cdsl": cdsl_path.name, "diagnostic": diagnostic_path.name,
                "future_rebuild_ready": diagnostic["semantic_validation"]["future_rebuild_ready"],
                "deferred_feature_count": len(diagnostic["semantic_validation"]["deferred_feature_ids"]),
                "unresolved_feature_count": len(diagnostic["semantic_validation"]["unresolved"])}
    except Exception as error:
-        _write_json(diagnostic_path, {"source": source.name, "part_id": part_id, "error": str(error)})
-        return {"part_id": part_id, "status": "failed", "diagnostic": diagnostic_path.name, "error": str(error)}
+        _write_json(diagnostic_path, {"source": source_name, "part_id": part_id, "error": str(error)})
+        return {"part_id": part_id, "source": source_name, "status": "failed", "diagnostic": diagnostic_path.name, "error": str(error)}


 def batch_convert(evidence_dir: Path, output_dir: Path, *, truth_dir: Path | None = None, workers: int = 1,
                  fail_fast: bool = False, overwrite: bool = False) -> dict[str, Any]:
-    sources = sorted(evidence_dir.glob("*.solidworks_evidence_v2.json"))
+    sources = sorted(evidence_dir.rglob(f"*{EVIDENCE_V2_SUFFIX}"))
    if not sources:
-        raise ValueError(f"No *.solidworks_evidence_v2.json files found in {evidence_dir}")
+        raise ValueError(f"No *{EVIDENCE_V2_SUFFIX} files found in {evidence_dir}")
+    sources_by_base_id: dict[str, list[Path]] = {}
+    for source in sources:
+        base_id = _part_id_from_source_name(source.name)
+        sources_by_base_id.setdefault(base_id, []).append(source)
+    part_id_by_source: dict[Path, str] = {}
+    for base_id, matching_sources in sources_by_base_id.items():
+        if len(matching_sources) == 1:
+            part_id_by_source[matching_sources[0]] = base_id
+            continue
+        for source in matching_sources:
+            relative_name = source.relative_to(evidence_dir).as_posix()
+            digest = hashlib.sha256(relative_name.encode("utf-8")).hexdigest()[:10]
+            part_id_by_source[source] = f"{base_id[:69]}-{digest}"
+    if len(set(part_id_by_source.values())) != len(part_id_by_source):
+        raise ValueError("Unable to create unique output part IDs from evidence source paths")
    output_dir.mkdir(parents=True, exist_ok=True)
-    convert = lambda source: _convert_path(source, output_dir, truth_dir, overwrite)
+    def convert(source: Path) -> dict[str, Any]:
+        relative = source.relative_to(evidence_dir)
+        step_relative = Path(str(relative).removesuffix(EVIDENCE_V2_SUFFIX) + ".step")
+        return _convert_path(source, output_dir, truth_dir, overwrite, relative.as_posix(), step_relative,
+                             part_id_by_source[source])
    results: list[dict[str, Any]] = []
    if workers == 1:
        for source in sources:
@@ -0,0 +1,395 @@
+{
+  "source": "02_传动件/0202_轴/020299_通用轴/0.750in Shaft.solidworks_evidence_v2.json",
+  "part_id": "0-750in-Shaft",
+  "source_status": "hybrid_semantic_surfaceir_pending",
+  "source_self_validation": {
+    "schema": "solidworks.cad_evidence.self_validation.v1",
+    "passed": true,
+    "meaning": "complete reusable extraction; not a claim of backend feature support or 1:1 rebuild",
+    "counts": {
+      "features": 43,
+      "opaque_exact_geometry_features": 0,
+      "typed_body_features": 13,
+      "direct_semantic_features": 5,
+      "typed_features_requiring_history": 8,
+      "complete_history_features": 8,
+      "spline_segments": 0,
+      "incomplete_splines": 0,
+      "exact_bcurves": 0,
+      "incomplete_bcurves": 0,
+      "exact_bsurfaces": 0,
+      "incomplete_bsurfaces": 0,
+      "exact_trimmed_faces": 0,
+      "incomplete_trimmed_faces": 0,
+      "missing_exact_geometry_catalog_references": 0,
+      "incomplete_topology_records": 0,
+      "skipped_getter_signatures": 2
+    },
+    "feature_contracts": [
+      {
+        "feature": "Boss-Extrude1",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Boss-Extrude2",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude1",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Mirror1",
+        "family": "mirror",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude2",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Boss-Extrude3",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude3",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude4",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Mirror2",
+        "family": "mirror",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Chamfer1",
+        "family": "chamfer",
+        "passed": true,
+        "blockers": []
+      },
+      {
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+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Boss-Extrude5",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "CirPattern1",
+        "family": "pattern",
+        "passed": true,
+        "blockers": []
+      }
+    ],
+    "blockers": []
+  },
+  "step_inference": {
+    "available": true,
+    "face_count": 98,
+    "surface_counts": {
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+      "cylinder": 15,
+      "plane": 81
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+    "repeat_spacings_mm": [],
+    "metrics": {
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+        -11.525,
+        168.2,
+        11.525,
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+      "face_count": 98,
+      "edge_count": 267,
+      "vertex_count": 176
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+    "truth_comparison": {
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+      "topology_counts_match": false
+    }
+  },
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+      "feature_id": "f_001",
+      "source_name": "Front Plane",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
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+      "atomic_id": "reference_plane",
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+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
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+      "unresolved": [],
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+    },
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+    },
+    {
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+    },
+    {
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+      "atomic_id": "reference_plane",
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+    },
+    {
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+      "atomic_id": "pattern_mirror",
+      "execution_status": "deferred",
+      "unresolved": [
+        "mirror pattern source features or plane were not captured"
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+      "step_inferred_selector_count": 0
+    },
+    {
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+      "source_name": "Chamfer1",
+      "atomic_id": "chamfer",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
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+      "source_name": "Boss-Extrude4",
+      "atomic_id": "extrude_add_blind",
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+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_018",
+      "source_name": "Boss-Extrude5",
+      "atomic_id": "extrude_add_blind",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    }
+  ],
+  "semantic_validation": {
+    "schema_version": "1.1.0",
+    "feature_count": 18,
+    "sketch_count": 11,
+    "deferred_feature_ids": [
+      "f_001",
+      "f_002",
+      "f_003",
+      "f_005",
+      "f_014",
+      "f_007",
+      "f_009",
+      "f_015",
+      "f_018",
+      "f_008",
+      "f_016"
+    ],
+    "unresolved": [
+      {
+        "feature_id": "f_015",
+        "reasons": [
+          "mirror pattern source features or plane were not captured"
+        ]
+      },
+      {
+        "feature_id": "f_008",
+        "reasons": [
+          "mirror pattern source features or plane were not captured"
+        ]
+      }
+    ],
+    "future_rebuild_ready": false
+  }
+}
@@ -0,0 +1,430 @@
+{
+  "source": "02_传动件/0202_轴/020299_通用轴/0.875in Shaft.solidworks_evidence_v2.json",
+  "part_id": "0-875in-Shaft",
+  "source_status": "hybrid_semantic_surfaceir_pending",
+  "source_self_validation": {
+    "schema": "solidworks.cad_evidence.self_validation.v1",
+    "passed": true,
+    "meaning": "complete reusable extraction; not a claim of backend feature support or 1:1 rebuild",
+    "counts": {
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+      "opaque_exact_geometry_features": 0,
+      "typed_body_features": 13,
+      "direct_semantic_features": 6,
+      "typed_features_requiring_history": 7,
+      "complete_history_features": 7,
+      "spline_segments": 0,
+      "incomplete_splines": 0,
+      "exact_bcurves": 0,
+      "incomplete_bcurves": 0,
+      "exact_bsurfaces": 0,
+      "incomplete_bsurfaces": 0,
+      "exact_trimmed_faces": 0,
+      "incomplete_trimmed_faces": 0,
+      "missing_exact_geometry_catalog_references": 0,
+      "incomplete_topology_records": 0,
+      "skipped_getter_signatures": 1
+    },
+    "feature_contracts": [
+      {
+        "feature": "Boss-Extrude1",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Boss-Extrude2",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude1",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude2",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Mirror1",
+        "family": "mirror",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Mirror2",
+        "family": "mirror",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude3",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude4",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Boss-Extrude3",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Boss-Extrude4",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Cut-Extrude5",
+        "family": "extrude",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Mirror3",
+        "family": "mirror",
+        "passed": true,
+        "blockers": []
+      },
+      {
+        "feature": "Chamfer1",
+        "family": "chamfer",
+        "passed": true,
+        "blockers": []
+      }
+    ],
+    "blockers": []
+  },
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+      "cylinder": 19,
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+        "pair_count": 2
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+      {
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+        "pair_count": 2
+      }
+    ],
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+        -13.1125,
+        -13.1125,
+        41.6,
+        13.1125,
+        13.1125
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+      "solid_count": 1,
+      "face_count": 51,
+      "edge_count": 117,
+      "vertex_count": 74
+    },
+    "error": null,
+    "truth_comparison": {
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+          -13.1125,
+          -13.1125,
+          41.6,
+          13.1125,
+          13.1125
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+        "edge_count": 78,
+        "vertex_count": 40
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+          "absolute_delta": 8.74800025485456e-06,
+          "within_tolerance": true
+        },
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+          "absolute_delta": 2.69900010607671e-06,
+          "within_tolerance": true
+        },
+        "bounding_box_mm": {
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+            -13.1125,
+            41.6,
+            13.1125,
+            13.1125
+          ],
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+            -13.1125,
+            41.6,
+            13.1125,
+            13.1125
+          ],
+          "max_absolute_delta": 0.0,
+          "within_tolerance": true
+        },
+        "solid_count": {
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+          "matches": true
+        },
+        "face_count": {
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+          "actual": 51,
+          "matches": false
+        },
+        "edge_count": {
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+          "matches": false
+        },
+        "vertex_count": {
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+          "actual": 74,
+          "matches": false
+        }
+      },
+      "numeric_geometry_match": true,
+      "topology_counts_match": false
+    }
+  },
+  "features": [
+    {
+      "feature_id": "f_001",
+      "source_name": "Front Plane",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_002",
+      "source_name": "Top Plane",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_003",
+      "source_name": "Right Plane",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_004",
+      "source_name": "Boss-Extrude1",
+      "atomic_id": "extrude_add_blind",
+      "execution_status": "supported",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_005",
+      "source_name": "Plane1",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_006",
+      "source_name": "Boss-Extrude2",
+      "atomic_id": "extrude_add_blind",
+      "execution_status": "supported",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_007",
+      "source_name": "Cut-Extrude1",
+      "atomic_id": "extrude_cut_blind",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_008",
+      "source_name": "Cut-Extrude2",
+      "atomic_id": "extrude_cut_blind",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_009",
+      "source_name": "Mirror1",
+      "atomic_id": "pattern_mirror",
+      "execution_status": "deferred",
+      "unresolved": [
+        "mirror pattern source features or plane were not captured"
+      ],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_010",
+      "source_name": "Mirror2",
+      "atomic_id": "pattern_mirror",
+      "execution_status": "deferred",
+      "unresolved": [
+        "mirror pattern source features or plane were not captured"
+      ],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_011",
+      "source_name": "Plane2",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_012",
+      "source_name": "Cut-Extrude3",
+      "atomic_id": "extrude_cut_blind",
+      "execution_status": "supported",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_013",
+      "source_name": "Plane3",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_014",
+      "source_name": "Cut-Extrude4",
+      "atomic_id": "extrude_cut_blind",
+      "execution_status": "supported",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_015",
+      "source_name": "Boss-Extrude3",
+      "atomic_id": "extrude_add_blind",
+      "execution_status": "supported",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_016",
+      "source_name": "Boss-Extrude4",
+      "atomic_id": "extrude_add_blind",
+      "execution_status": "supported",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_017",
+      "source_name": "Cut-Extrude5",
+      "atomic_id": "extrude_cut_blind",
+      "execution_status": "supported",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_018",
+      "source_name": "Plane4",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_019",
+      "source_name": "Mirror3",
+      "atomic_id": "pattern_mirror",
+      "execution_status": "deferred",
+      "unresolved": [
+        "mirror pattern source features or plane were not captured"
+      ],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_020",
+      "source_name": "Chamfer1",
+      "atomic_id": "chamfer",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    }
+  ],
+  "semantic_validation": {
+    "schema_version": "1.1.0",
+    "feature_count": 20,
+    "sketch_count": 10,
+    "deferred_feature_ids": [
+      "f_001",
+      "f_002",
+      "f_003",
+      "f_005",
+      "f_018",
+      "f_007",
+      "f_008",
+      "f_011",
+      "f_013",
+      "f_019",
+      "f_009",
+      "f_010",
+      "f_020"
+    ],
+    "unresolved": [
+      {
+        "feature_id": "f_019",
+        "reasons": [
+          "mirror pattern source features or plane were not captured"
+        ]
+      },
+      {
+        "feature_id": "f_009",
+        "reasons": [
+          "mirror pattern source features or plane were not captured"
+        ]
+      },
+      {
+        "feature_id": "f_010",
+        "reasons": [
+          "mirror pattern source features or plane were not captured"
+        ]
+      }
+    ],
+    "future_rebuild_ready": false
+  }
+}
@@ -958,9 +958,9 @@
  ],
  "meta": {
    "unit": "mm",
-    "source": "009934.solidworks_evidence_v2.json",
+    "source": "01_紧固件/0103_螺母/010399_通用螺母/009934.solidworks_evidence_v2.json",
    "source_schema": "solidworks.cad_evidence.v2",
-    "source_status": "complete_with_blockers",
+    "source_status": "hybrid_semantic_surfaceir_pending",
    "document_truth": {
      "mass_properties": {
        "available": true,
@@ -970,12 +970,12 @@
        "center_of_mass": [
          0.003473722016553019,
          8.200887174042614e-10,
-          -1.0741909887941224e-18
+          -9.207351332521049e-19
        ],
        "principal_moments": [
-          2.3744247976046566e-07,
-          2.3744390350013543e-07,
-          4.543654594650758e-07
+          2.374424797376348e-07,
+          2.3744390352296683e-07,
+          4.5436545946507525e-07
        ],
        "principal_axes": null,
        "moment_of_inertia": null
@@ -1,13 +1,14 @@
 {
-  "source": "009934.solidworks_evidence_v2.json",
+  "source": "01_紧固件/0103_螺母/010399_通用螺母/009934.solidworks_evidence_v2.json",
  "part_id": "009934",
-  "source_status": "complete_with_blockers",
+  "source_status": "hybrid_semantic_surfaceir_pending",
  "source_self_validation": {
    "schema": "solidworks.cad_evidence.self_validation.v1",
-    "passed": false,
+    "passed": true,
    "meaning": "complete reusable extraction; not a claim of backend feature support or 1:1 rebuild",
    "counts": {
      "features": 33,
+      "opaque_exact_geometry_features": 0,
      "typed_body_features": 3,
      "direct_semantic_features": 1,
      "typed_features_requiring_history": 2,
@@ -28,18 +29,14 @@
      {
        "feature": "旋转1",
        "family": "revolve",
-        "passed": false,
-        "blockers": [
-          "revolve has no captured semantic selections"
-        ]
+        "passed": true,
+        "blockers": []
      },
      {
        "feature": "切除-旋转1",
        "family": "revolve",
-        "passed": false,
-        "blockers": [
-          "revolve has no captured semantic selections"
-        ]
+        "passed": true,
+        "blockers": []
      },
      {
        "feature": "切除-拉伸1",
@@ -48,10 +45,7 @@
        "blockers": []
      }
    ],
-    "blockers": [
-      "旋转1: revolve has no captured semantic selections",
-      "切除-旋转1: revolve has no captured semantic selections"
-    ]
+    "blockers": []
  },
  "step_inference": {
    "available": true,
@@ -0,0 +1,203 @@
+{
+  "source": "01_紧固件/0105_挡圈卡环/010502_GBT894轴用弹性挡圈/01 - Anel Externo.solidworks_evidence_v2.json",
+  "part_id": "01---Anel-Externo",
+  "source_status": "hybrid_semantic_surfaceir_pending",
+  "source_self_validation": {
+    "schema": "solidworks.cad_evidence.self_validation.v1",
+    "passed": true,
+    "meaning": "complete reusable extraction; not a claim of backend feature support or 1:1 rebuild",
+    "counts": {
+      "features": 19,
+      "opaque_exact_geometry_features": 0,
+      "typed_body_features": 1,
+      "direct_semantic_features": 0,
+      "typed_features_requiring_history": 1,
+      "complete_history_features": 1,
+      "spline_segments": 0,
+      "incomplete_splines": 0,
+      "exact_bcurves": 0,
+      "incomplete_bcurves": 0,
+      "exact_bsurfaces": 0,
+      "incomplete_bsurfaces": 0,
+      "exact_trimmed_faces": 0,
+      "incomplete_trimmed_faces": 0,
+      "missing_exact_geometry_catalog_references": 0,
+      "incomplete_topology_records": 0,
+      "skipped_getter_signatures": 0
+    },
+    "feature_contracts": [
+      {
+        "feature": "Revolução1",
+        "family": "revolve",
+        "passed": true,
+        "blockers": []
+      }
+    ],
+    "blockers": []
+  },
+  "step_inference": {
+    "available": true,
+    "face_count": 28,
+    "surface_counts": {
+      "cone": 18,
+      "torus": 10
+    },
+    "axis_count": 18,
+    "repeat_spacings_mm": [
+      {
+        "spacing_mm": 0.8764,
+        "pair_count": 2
+      },
+      {
+        "spacing_mm": 4.1236,
+        "pair_count": 2
+      },
+      {
+        "spacing_mm": 0.0002,
+        "pair_count": 2
+      },
+      {
+        "spacing_mm": 3.2471,
+        "pair_count": 2
+      }
+    ],
+    "metrics": {
+      "bounding_box_mm": [
+        -2.500005667,
+        -8.000986062,
+        -8.001675342,
+        2.506015762,
+        8.002363218,
+        8.001675342
+      ],
+      "volume_mm3": 335.524697132,
+      "surface_area_mm2": 638.305086929,
+      "solid_count": 1,
+      "face_count": 28,
+      "edge_count": 56,
+      "vertex_count": 28
+    },
+    "error": null,
+    "truth_comparison": {
+      "expected_from_evidence": {
+        "bounding_box_mm": [
+          -2.5,
+          -8.000986062,
+          -8.001675242,
+          2.50600928,
+          8.002363218,
+          8.001675242
+        ],
+        "volume_mm3": 335.524697132,
+        "surface_area_mm2": 638.305086929,
+        "solid_count": 1,
+        "face_count": 14,
+        "edge_count": 14,
+        "vertex_count": 0
+      },
+      "comparisons": {
+        "volume_mm3": {
+          "expected": 335.524697132,
+          "actual": 335.524697132,
+          "absolute_delta": 0.0,
+          "within_tolerance": true
+        },
+        "surface_area_mm2": {
+          "expected": 638.305086929,
+          "actual": 638.305086929,
+          "absolute_delta": 0.0,
+          "within_tolerance": true
+        },
+        "bounding_box_mm": {
+          "expected": [
+            -2.5,
+            -8.000986062,
+            -8.001675242,
+            2.50600928,
+            8.002363218,
+            8.001675242
+          ],
+          "actual": [
+            -2.500005667,
+            -8.000986062,
+            -8.001675342,
+            2.506015762,
+            8.002363218,
+            8.001675342
+          ],
+          "max_absolute_delta": 6.4820000003074085e-06,
+          "within_tolerance": true
+        },
+        "solid_count": {
+          "expected": 1,
+          "actual": 1,
+          "matches": true
+        },
+        "face_count": {
+          "expected": 14,
+          "actual": 28,
+          "matches": false
+        },
+        "edge_count": {
+          "expected": 14,
+          "actual": 56,
+          "matches": false
+        },
+        "vertex_count": {
+          "expected": 0,
+          "actual": 28,
+          "matches": false
+        }
+      },
+      "numeric_geometry_match": true,
+      "topology_counts_match": false
+    }
+  },
+  "features": [
+    {
+      "feature_id": "f_001",
+      "source_name": "Plano frontal",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_002",
+      "source_name": "Plano superior",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_003",
+      "source_name": "Plano direito",
+      "atomic_id": "reference_plane",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    },
+    {
+      "feature_id": "f_004",
+      "source_name": "Revolução1",
+      "atomic_id": "revolve_add",
+      "execution_status": "deferred",
+      "unresolved": [],
+      "step_inferred_selector_count": 0
+    }
+  ],
+  "semantic_validation": {
+    "schema_version": "1.1.0",
+    "feature_count": 4,
+    "sketch_count": 2,
+    "deferred_feature_ids": [
+      "f_001",
+      "f_002",
+      "f_004",
+      "f_003"
+    ],
+    "unresolved": [],
+    "future_rebuild_ready": true
+  }
+}
@@ -1162,10 +1162,7 @@
          }
        ]
      },
-      "execution_status": "deferred",
-      "unresolved": [
-        "hole has no captured semantic selections"
-      ]
+      "execution_status": "deferred"
    },
    {
      "id": "f_012",
@@ -1192,10 +1189,7 @@
          }
        ]
      },
-      "execution_status": "deferred",
-      "unresolved": [
-        "hole has no captured semantic selections"
-      ]
+      "execution_status": "deferred"
    },
    {
      "id": "f_015",
@@ -2056,9 +2050,9 @@
  ],
  "meta": {
    "unit": "mm",
-    "source": "011524.solidworks_evidence_v2.json",
+    "source": "01_紧固件/0106_销/010699_通用销/011524.solidworks_evidence_v2.json",
    "source_schema": "solidworks.cad_evidence.v2",
-    "source_status": "complete_with_blockers",
+    "source_status": "hybrid_semantic_surfaceir_pending",
    "document_truth": {
      "mass_properties": {
        "available": true,
@@ -2066,14 +2060,14 @@
        "volume": 1.959194331462506e-06,
        "surface_area": 0.0022937314106504267,
        "center_of_mass": [
-          0.005536254769071257,
+          0.005536254769071256,
          0.002772850696917079,
          -0.0018885511388564435
        ],
        "principal_moments": [
-          8.820786764021557e-08,
+          8.820786764021561e-08,
          2.6274905890636556e-07,
-          3.3427347813947356e-07
+          3.342734781394733e-07
        ],
        "principal_axes": null,
        "moment_of_inertia": null
--- a/Show More
+++ b/Show More