The standard tugboat calibration print, modelled from scratch.
| File | Kind | Size |
|---|---|---|
| benchy.step | STEP | 0.7 MB |
| benchy.stl | STL | 0.4 MB |
contract.yaml (design contract)
Create a CAD model for a standard benchy the tugboat, used by 3D printers for calibration checking. Once complete, I will print it and physically measure the features against a control I already have.
| Tier | Gate | Result | Evidence |
|---|---|---|---|
| A | contract_provenance Contract validates; stated/measured sources resolve to bundle files; no blocking open questions; interfaces pinned by checks | PASS | designs/benchy/contract.yaml: 48 parameters {'stated': 23, 'inferred': 25}; sources unresolved {}; unanchored 0 |
| A | envelope Bounding box of the exported STEP equals the contract envelope | PASS | results/build123d/benchy/inspect.json bbox.max_error = 0.0 (tol 0.05) |
| A | mass_properties Volume, surface area and centre of mass within contract tolerance (independent STEP measurement) | PASS | results/build123d/benchy/inspect.json volume = 14733.8949 vs 15550.0 |
| A | features Every required feature, section, named face, cylinder axis, plane, dimension, body, clearance, passage, wall, gear and symmetry check verified on the STEP | PASS | results/build123d/benchy/inspect.json features: 11/11 ok; failed required []; failed optional []; unverified [] |
| A | reference_fidelity Deviation from the reference model within the contract band (when a reference exists) | n/a | results/build123d/benchy/inspect.json deviation.p95 = None hausdorff = None silhouette_iou_min = None |
| B | export_agreement Engine, STEP (OpenCascade) and STL (trimesh) volumes agree | PASS | results/build123d/benchy/inspect.json agreement engine=14733.89486569112 step=14733.89488656667 stl=14728.906252249517 (rel tol 0.002; independent=False) |
| B | edit_robustness Declared parameter edits rebuild with the expected effect, undriven interfaces stay put, sweeps regenerate, infeasible values are refused; baseline re-export hash unchanged | PASS | results/build123d/benchy/edit.json 3/3 edit tests ok; restore.ok = True |
| B | source_hygiene Dialect, units, formatted, lint-clean, named parameters match the contract, asserts present | PASS | results/build123d/benchy/verify.json hygiene: dialect=True unit=True legacy=[] params_ok=True asserts=46 unused={'nameplateThickness': {'defined_in': 'main.py', 'edit_test': False, 'ok': True}} |
| C | export_integrity Deterministic STEP (two exports identical), valid B-rep, expected solid count, watertight STL (solid shells == solids) | PASS | results/build123d/benchy/export.json step.deterministic = True sha256 357effc0e80c; stl=present; glb=present |
| C | traceability Every stage JSON present with tool versions, git head, worker thread ids, engine-call ledger; no --allow-errors | PASS | stages present: {'plan': True, 'model': True, 'verify': True, 'export': True, 'inspect': True, 'edit': True} |
| C | evidence_separation Contract agreement, reference agreement and physical validation are reported as separate verdicts | PASS | results/build123d/benchy/inspect.json carries contract checks (volume/bbox/features) and a separate deviation block (reference = None) |
| C | independence The source is editable construction: no import of reference geometry, construction ops present, no traced geometry | PASS | results/build123d/benchy/verify.json hygiene.forbidden_imports = [] construction_ops = {'calls': 35, 'has_result': True} lines = 375 |