In a browser CAD tool, a body used as the tool in a later Combine vanished from the Bodies list and from the exported STL. Export STL also gave no file while any Combine was failed, and the Body panel showed the wrong piece. Four fixes came out of one readiness check, all behind a flag.
Recurring agent failure issue in SpindleLabs (SpindleLabs-app)
What engineers report
A recurring agent failure problem in SpindleLabs (SpindleLabs-app) that mostly hits the mechanical designer.
Failure pattern: validation / failure
Analyst note
From the Grok pain-radar digests, Nov 10-11 2026 (Nov 10 8:41 AM ET through Nov 11 7:41 AM ET digests plus the Haitch editions). Verified live 2026-11-11: 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 SpindleLabs (SpindleLabs-app).
Evidence
More recurring errors in SpindleLabs (SpindleLabs-app)
- One cut through two boxes followed by an edit to the first box's position left three bodies and 31,200 mm3 instead of four bodies and 41,600 mm3, a missing 10,400 mm3 chunk with no row in the Bodies list and nothing in the STL. In a second case a Join left a body drawn on screen but out of the Bodies list, and STL export reported 'Checked solid' at 1,480 mm3 instead of 2,480.MCAD · impact 74
- In a browser parametric CAD, a fuzzer found an edit that moved a feature with no dependency on the edited one. Step 224 of a seeded run set a size, and feature-170's end centroid jumped from z 85 to 47. It is a fuzz report with a replay command, not a user complaint, but it is the exact failure that makes people distrust a parametric history.MCAD · impact 66
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.