Parametric reconstruction from renders, sections and a dimension sheet.
| File | Kind | Size |
|---|---|---|
| fusion-12944-recon.step | STEP | 100 KB |
| fusion-12944-recon.stl | STL | 0.9 MB |
contract.yaml (design contract)
Reconstruct the mechanical part shown in the attached renders, sections and dimension sheet as editable, parameterized KCL in the part's own frame (bbox min [-63.351, -0.0, -54.0], size [126.701, 15.0, 108.0] mm). Declare every hole, boss and shaft as an acceptance cylinder and every planar face level as a named face; one solid; export STEP and STL. Held-out: the pipeline is frozen, the reference CAD is evaluator-only. The body is a 15 mm square-ish mounting flange (Fusion Gallery 22303_e9723631_0014_1 / joint_set_12944) with four Ø24 corner bosses and coaxial Ø10 holes, concave Ø174 side cuts, a through Ø18 centre bore, a through hub, and matching circular pockets 3 mm deep from each Y face.
| 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/fusion-12944-recon/contract.yaml: 24 parameters {'stated': 16, 'derived': 7, 'inferred': 1}; sources unresolved {}; unanchored 0 |
| A | envelope Bounding box of the exported STEP equals the contract envelope | PASS | results/build123d/fusion-12944-recon/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/fusion-12944-recon/inspect.json volume = 148055.5817 vs 148190.98 |
| 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/fusion-12944-recon/inspect.json features: 10/10 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/fusion-12944-recon/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/fusion-12944-recon/inspect.json agreement engine=148055.58174867366 step=148055.5817486748 stl=148115.589295233 (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/fusion-12944-recon/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/fusion-12944-recon/verify.json hygiene: dialect=True unit=True legacy=[] params_ok=True asserts=29 |
| C | export_integrity Deterministic STEP (two exports identical), valid B-rep, expected solid count, watertight STL (solid shells == solids) | PASS | results/build123d/fusion-12944-recon/export.json step.deterministic = True sha256 499fbe7cc2d5; 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/fusion-12944-recon/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 | PASS | results/build123d/fusion-12944-recon/verify.json hygiene.forbidden_imports = [] construction_ops = {'calls': 26, 'has_result': True} lines = 167 |