A user redrew a gear reducer assembly with the agent and found gear teeth hatched in an axial section, wrong tooth chamfers, root lines taken from the picture instead of computed (z1 = 15 needs profile shift), and adjacent parts with the same hatch.
Recurring agent failure issue in AgentCAD (lizaixi01)
What engineers report
A recurring agent failure problem in AgentCAD (lizaixi01) that mostly hits the mechanical designer.
Failure pattern: agent / failure
Analyst note
From the Grok pain-radar digests, Nov 8-9 2026 (Nov 8 8:41 AM ET through Nov 9 6:41 AM ET digests plus the Haitch editions). Verified live 2026-11-09: issue/PR read; title and state confirmed.
What it costs a team
Modeled annual cost
$30,000
For a team of 5
Prototype delay
3 days
Modeled schedule slip per occurrence
Time lost
240 min
Per engineer per month, about 1 incidents
How the cost is modeled
240 min/month × 5 engineers × 12 months = 240 hours × $125/hour = $30,000
A modeled estimate with medium confidence. Swap in your own team size and loaded rate to size it for your team.
Engineering tools that address it
No engineering tool profile lists this error yet. Browse tools that connect to AgentCAD (lizaixi01).
Evidence
More recurring errors in AgentCAD (lizaixi01)
- 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.MCAD · impact 74
- In a rerun (Codex, A3 sheet, 1:2 viewport) dimensions printed at 1.75 mm against a 2.5 mm minimum. The agent saw PRINTED_TEXT_TOO_SMALL and left it on purpose, because the task said not to change dimensions and both suggested fixes would break that, while the right fix, DIMSCALE, only re-rendered dimensions in the tool's own style.MCAD · impact 74
- In a rerun, every value graded right, yet three agent-made drawings would still get marked by a checker: diameter lines of 150, 110 and 60 all crossing at the flange center, two diameters drawn on one line, and a stepped shaft with no shoulder lines. The agents had rendered previews and still missed it, and the fix adds drafting warnings.MCAD · impact 74
Sourced from public community reports. Costs and delays are modeled estimates, not measurements. Know a better source or a fix? Tell us at hello@productflo.io.