The case builder in an AI board pipeline did everything itself: CAD, writing and running about 252 leg-pose sweeps, plate layout, slicing, docs. The case stage took about 2.5 hours. Now the controller runs the declared checks after each turn with no model call. A missing or stale report counts as unverified, never as a pass. The team decided the model should not be the one who says the checks passed.
Recurring agent failure issue in autonomous-circuit (autonomous-ai)
What engineers report
A recurring agent failure problem in autonomous-circuit (autonomous-ai) that mostly hits the mechanical designer.
Failure pattern: agent / failure
Analyst note
From the Grok pain-radar digests, Nov 11-12 2026 (Nov 11 8:41 AM ET through Nov 12 5:41 AM ET digests plus the Haitch editions). Verified live 2026-11-12: 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 autonomous-circuit (autonomous-ai).
Evidence
More recurring errors in autonomous-circuit (autonomous-ai)
- The handwired case check only read a passed flag from a report the agent wrote for that run. Real prints then needed drilled wire holes, had clamp bars hitting servos, and passed with a 0.23 mm gap at a moving joint. Worse, the volume function returned 0 when the geometry kernel failed, so a failed measurement read as no overlap. The fix measures exported STLs directly and adds an unverified verdict that is not a pass.MCAD · impact 74
- A robot project lead pushed a 599 MB export to a public repo, including a 158 MB STEP, 64 MB of firmware .elf and .map files, and 43 MB of datasheets, and running the generators from sources alone failed because the case build needs a hash-pinned board.step from an undocumented chain of about 30 board scripts.PLM · impact 66
- The case team's run (dog-nautilus-v2 r001) had finished its own checks, 49 of 49 print checks and 117 of 117 fit checks. Its native case check stayed unverified only because the board team, running in parallel, had not published boards/main.enclosure.json yet. That sent the case to the lead agent for advice. The lead returned 4 actions, and one pointed at the board team's sibling worktree (../r001-board/...). That single bad path aborted the whole run as needs_revision. The fix drops invalid actions and treats a missing board map as waiting, not a defect.MCAD · impact 66
- The enclosure contract is built from the PCB, parts.json and the case's own interfaces.json, but only the board stage rebuilt it. In one run the case team changed how U1 (ESP32) and J7 (OLED) face the case. Every official case check then read the old contract and reported 5 false errors, frame collisions and blocked USB, BOOT and OLED. The sandboxed case agent could not write the board folder or run KiCad inspect, so retries looped at about $8 each. The fix has the controller rebuild the contract before every case check. On real data the check went from 5 errors to a pass.MCAD · impact 66
- On a 3MF print file for the same robot, the filament split was right, but 8 of 12 long leg parts on plate 1 ran along Y on a bed slinger, and both plate names were empty.MCAD · impact 58
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.