优化skill，添加特征树、编辑窗口

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+# 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`