twincat-mcp (eponce00)VerificationConfidence: Medium

Field report from a full agent-driven session on TwinCAT 3.1.4026. The agent created two struct DUTs and a GVL through the MCP server, each saved with tree readback, but a build 3 seconds later contained no trace of the new objects, with 0 errors and 0 warnings. Only a touch edit (adding a comment) pulled the objects into the compile.

Impact Analysis

Persona

Hardware Engineer

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

eponce00/twincat-mcp Issue #11: Agent loop findings from real session: stale compile after mutations, stale build output, no post-build symbol verification, unreferenced-stripping footgun

github.com

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Analyst Notes

From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.