anvilcad (swperb)MCADConfidence: Medium

Two Claude Code sessions modeled parts through an AnvilCAD MCP server. When the agent changed a plate from 8 to 10 mm thick, a boss sketched on its top face rotated about the origin and landed beside the plate. The volume still looked plausible; only the bounding box and a screenshot showed the part was wrong.

Impact Analysis

Persona

Mechanical Designer

Team Size Impact

5x Multiplier

Prototype Delay

3 Days

Est. Annual Cost

$30,000

1 user · 1 month240 min
Rest of team960 min
Rest of year13,200 min

monthly_minutes × 12 × team_multiplier ÷ 60 × $75/hr = $30k/yr

$75/hr assumed rate.

Annual team-minutes decomposed from the reported monthly inputs.

Evidence & Sources

1 Sources

swperb/anvilcad PR #39: Fix face sketches turning on rebuild; MCP fixes from live agent runs

github.com

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Analyst Notes

From the Grok pain-radar digest, Oct 20 2026 (7:41 AM to 9:41 AM ET slots). Verified live 2026-10-21: issue/PR read on GitHub; title and state confirmed.