Your one stop shop for agentic CAD.

Independent reviewer for a pull request in a cad-agent or CAD product repo (code, CAD geometry, simulation evidence, docs). Give it the PR URL and a checkout of the branch; it reads the diff, verifies claims by running tests and small scripts, posts inline comments and a summary review on GitHub, and returns the findings. It does not edit, push, approve or merge. Use for every PR before merging.

Rebuilds the state of interrupted work from GitHub and the local and remote checkouts after a session ended (tokens ran out, crash, new computer) and reports what is done, what is in flight and the next steps. Give it the repo(s) and, if known, the tracking issue. It reads issues, PRs, branches, unpushed commits and run logs; it changes nothing except pushing local commits that exist only on this machine, if told to.

Use when implementing or reviewing articulated CAD viewers and robot simulations, especially parts orbiting away from shafts, mismatched units or frames, nested joints, and stationary housings that rotate with rotors.

Use when a pull request in a cad-agent or product repo is ready for review, or when asked to review one. The author gets an independent review from a separate agent (the cad-pr-reviewer subagent, or a fresh Codex session) that did not write the change, answers every comment on the PR, fixes or explains, resolves the threads, and merges only under the repo's rules. Covers code, CAD geometry and simulation evidence.

Use before starting any CAD/FEA/CFD/topology run or full pipeline that takes more than a few minutes or several GB of memory. Run it on a compute host instead of the workstation the agents share, detached so it survives the session, recorded in the GitHub issue (host, command, log, done marker, how to collect results) so any machine can pick it up, and its results pulled back and committed.

Use at the start of any multi-step change in a cad-agent or product repo, and every ~30 minutes while working. Keeps work recoverable when the session ends (tokens run out, the host crashes or is reformatted) with a GitHub issue per piece of work with a done/next/how-to-resume checklist, a branch pushed in clean commits as you go, an early draft PR linked with "Closes #N", long runs recorded in the issue, and issues closed as PRs merge. Also use to resume work from GitHub alone.

Use when building or changing a mechanical design with cad-agent (an enclosure, a robot, a mechanism, any assembly). Work section by section: frame each section with its requirements and interfaces before drawing, write a small spec card per part with its geometry, declare cavities, joints, fasteners and assembly steps in the build script, run cad-agent gates and cad-agent dossier and fix them in order, render the section review packet and critique it against the checklist with the measurements first, then hand the section to a separate reviewer. Includes the work-tracking rules.

Use for any bought hardware in a CAD design (bearings, screws, nuts, washers, heat-set inserts, dowel and shoulder pins, standoffs and spacers, rod ends, threaded rod, grommets). Always choose a real McMaster-Carr part with a part number and place its manufacturer STEP model, normalised into a known frame, instead of drawing an envelope; record the part, its full specification table, price and mass in the project's hardware catalogue.

Covestro and DuPont guides plus 13 filament datasheets, condensed into cad-agent snapfit: tested against the guide's worked examples, with allowable strain by print direction.

Recurring review findings from Gyropup and J501 (a rib inside a countersink, blocked holes, bridges), each with the automated check that catches it.

Same pattern: guides and papers, equations with their test cases, process and print-direction limits.

A wheel-legged foam-ball battle robot designed, simulated and documented by agents with this toolkit.

A printed enclosure and cooler for a Jetson AGX Orin carrier: where most of the lessons came from.