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cadSet/designir-pipeline/README.md
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2026-07-27 17:24:04 +08:00

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# DesignIR Pipeline
This directory owns the STEP reconstruction and distillation boundary:
```text
teacher STEP
-> deterministic private evidence extraction
-> reconstruction agent authors DesignIR 2.0
-> isolated compiler rebuilds STEP without teacher access
-> acceptance agent compares teacher and rebuilt STEP
-> deterministic publisher promotes repeated validated experience
```
## Security boundary
| Component | Teacher STEP | Private evidence | DesignIR | Rebuilt STEP |
| --- | --- | --- | --- | --- |
| Ingestion service | read | write | no | no |
| Reconstruction agent | denied | read | write | request compilation |
| Isolated compiler | denied | no | read | write |
| Acceptance agent | read | read | read | read |
| Publisher | denied | aggregate only | schema only | reports only |
The reconstruction environment must remain functional after the teacher STEP is
removed. `scripts/designir_pipeline.py anti-cheat` rejects source STEP
references, imported B-Reps, embedded meshes, topology references, and generator
source that calls STEP import APIs.
## Workspace
Runtime data is role-separated under `workspace/`:
For the exact input, process, acceptance, and output locations, see
[`workspace/README.md`](workspace/README.md).
```text
workspace/
teacher/inbox/ uploaded STEP/STP files
teacher/evidence/ private deterministic evidence
reconstruction/inbox/ evidence packets for Agent A
reconstruction/designir/ authored DesignIR 2.0
reconstruction/output/ independently rebuilt STEP
acceptance/inbox/ manifests visible to Agent B
acceptance/reports/ geometry and editability reports
promotion/candidates/ untrusted generalized methods
promotion/replay_validated/
promotion/promoted/ deterministic published experience
quarantine/ unsupported vocabulary and failed cases
```
Only `.gitkeep` files are versioned in runtime directories. Teacher geometry,
private evidence, generated parts, and reports stay local.
## DesignIR 2.0
The executable contract is documented by
`contracts/designir-2.0.schema.json`. It describes coordinate systems, datums,
parameters, expressions, sketches, constraints, features, patterns,
attachments, construction stages, edit interfaces, and validation contracts.
It never contains teacher geometry.
The initial compiler deliberately supports a small, honest vocabulary through
both Build123d and SimpleCADAPI adapters:
- `extrude_circle`
- `extrude_rectangle`
- `add_cylinder`
- `through_hole`
- `polar_hole_pattern`
Unsupported geometry is quarantined with explicit missing capabilities instead
of embedding the source B-Rep.
The SimpleCADAPI adapter also emits its replayable
`*.simplecad.model.json` operation graph beside the STEP. DesignIR remains the
backend-neutral source of truth.
## Agents
- `agents/reconstruction-agent.md`: Agent A authors DesignIR from private
evidence and promoted methods, then requests an isolated rebuild.
- `agents/acceptance-agent.md`: Agent B independently checks geometry and
parameter perturbations against the teacher.
Neither agent publishes experience. `config/promotion-policy.json` is evaluated
by deterministic code after several independent cases pass.
## Commands
Use the CAD Python environment:
```bash
../text-to-cad/.venv/bin/python scripts/designir_pipeline.py validate part.designir.json
../text-to-cad/.venv/bin/python scripts/designir_pipeline.py compile \
part.designir.json --output rebuilt.step
../text-to-cad/.venv/bin/python scripts/designir_pipeline.py isolated-rebuild \
part.designir.json --output rebuilt.step --backend simplecadapi
../text-to-cad/.venv/bin/python scripts/designir_pipeline.py accept \
--teacher teacher.step --designir part.designir.json \
--rebuilt rebuilt.step --report acceptance.json
```