dfam-check

DfAM Check

Provenance: maintained in earthtojake/text-to-cad. Use the installed local skill files as the runtime source of truth; the repository link is only for provenance and release review.

Use this skill to produce conservative, evidence-backed DfAM reports for mesh files before slicing or printing. It measures geometry facts locally and compares them against per-process design limits; it never slices, uploads, or starts print jobs.

Geometry Inspection

Use scripts/dfam_tool.py in the active project Python environment for all geometry facts (install requirements.txt first — every run needs it). The tool is fact-only: it reports measurements and never emits pass/fail or readiness statuses. Comparisons and verdicts belong to this workflow. Do not estimate wall thickness, overhang angles, or support volume by eye or from renders when the tool can measure them.

python scripts/dfam_tool.py measure part.stl --angle-limit 45
python scripts/dfam_tool.py orientations part.stl --angle-limit 45

Set --angle-limit to the target process's self-supporting angle from references/process-limits.md before measuring, and re-run when the target process changes: the aggregate support-area facts are binned against it.

STEP/STP input is boundary-representation CAD, not a mesh. When the $cad skill is installed, export an STL sidecar with it first, then measure the STL here. Report that remediation instead of attempting raw STEP parsing. measure on a STEP exits 1 with {"error": "failed to load mesh: ..."}; that is the wrong-input signal, not a missing dependency — do not install extra mesh loaders to work around it.

A fact family that cannot compute returns {"error": ...} in its place rather than costing the report its other measurements — wall_thickness does this when the dependency set is incomplete, support_volume on geometry with no convex hull. That report is PARTIAL: it carries "partial": true, names the families in partial_sections, and the command exits 2 (0 is a complete report, 1 a mesh that would not load at all). Treat every such object as an unmeasured fact (❓ need more info), never as a measurement of zero, and reinstall requirements.txt before comparing wall limits.