Measure mesh files against Design for Additive Manufacturing (DfAM) rules and report printability findings per process (FDM, SLS, SLA/DLP, metal PBF, MJF). Use when the user asks whether a part is printable, wants overhang/wall-thickness/support analysis of an `.stl`, `.obj`, `.ply`, or `.3mf` mesh,

DfAM Check Provenance: maintained in [earthtojake/text to cad](https://github.com/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. 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. Workflow 1. Collect print intent: target process, material, layer height, and any machine or material datasheet the user can provide. If the process is unknown, measure once with the default 45° limit, then present findings per candidate process rather than guessing a single verdict. 2. Read references/process limits.md and select the limit column for the target process. A user provided machine/material datasheet overrides the defaults; cite whichever source is used for every comparison. 3. Run measure on the exact upload file. Do not inspect only a generator script, source CAD model, or console summary of the file. 4. Run orientations when the process requires supports and the measured support area is nonzero. Report any candidate that materially reduces support area, with its build height tradeoff. 5. Compare each measured fact to the cited limit and report findings with restrained status labels: ✅ pass : the measured fact satisfies the cited limit. ❌ fail : a measured fact directly violates the cited limit. ❓ need more info : missing process context, unmeasured geometry, sampling too sparse to trust, or tool limitations. 6. Order findings by severity: watertightness first (blocks slicing for every process), then wall thickness, then overhangs/supports, then orientation and cost signals. Comparison Compare only trustworthy pairs of evidence. Cite the limit source (process limits table row, or the user's datasheet field) and the measured fact (JSON field path) for every finding. Treat p05 mm below the wall thickness limit as a violation even when min mm alone could be a sampling outlier; report both values. On an assembly, wall thickness reports body count and a per body breakdown. Attribute a violation to the body it belongs to; a thin figure pooled across bodies is not a finding against the part as a whole. Do not apply support angle findings to powder processes (SLS, MJF); the relevant powder process check is trapped volume powder escape, which this tool does not yet measure — report that as ❓ need more info when enclosed cavities are likely. Do not silently rescale geometry. scale.units suspect is measured from the bounding box diagonal: when it is true , the source is probably in meters or inches, every down facing face reads as resting on the plate, and overhang and support figures of 0.0 mean nothing. Report a unit/scale finding and ask the user to confirm units before comparing anything against a material limit. Support volume ratios are coarse upper bounds; report them as cost signals, not hard failures, unless the user has set an explicit budget. Redesign Handoff For every ❌ fail , include a concrete, plain language redesign instruction with target numbers (for example "thicken the wall at [12.4, 3.0, 8.1] from 0.6 mm to ≥1.2 mm" or "chamfer the overhang at [23.3, 10.0, 52.0] to ≥45°"). When the $cad skill is installed, offer to apply the redesign instructions with it and re measure the regenerated geometry here, repeating until no ❌ fail findings remain. When $cad viewer is installed, hand the measured file path(s) to it so the user can inspect the findings visually.

dfam-check