AgentCAD (lizaixi01)MCADConfidence: Medium

An agent deleted VIEWPORT on a sheet it had just made, removing the layout's main viewport, while strict validation, validate_drawing and AutoCAD AUDIT all reported 0 errors, and AutoCAD 2027 then stops with ePermanentlyErased on open.

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

lizaixi01/AgentCAD PR #77: Keep a layout's main viewport: AutoCAD cannot open the layout without it

github.com

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Analyst Notes

From the Grok pain-radar digests, Nov 1-2 2026 (Nov 1 8:41 AM ET through Nov 2 7:41 AM ET digests plus the Haitch editions). Verified live 2026-11-02: issue/PR read; title and state confirmed.