I shipped a broken install command for my MCP server — an honest postmortem
Left-Yellow1047 · reddit · 2026-09-04
The author of rebuild-dossier, an MCP server that reverse-engineers a rebuild spec from an existing app for coding agents, admits the primary install command crashed for every user due to a missing node shebang. Version 0.2.6 fixes it, with every readme path verified: npx, global install, source, HTTP mode, 538 passing tests, typecheck, and all six tools listed via the official MCP SDK. They also retract earlier overstated claims ("80% accuracy, zero dead code"), noting the v0 tool was validated end-to-end against one messy repo with two fresh-agent handoffs, with weak tests documented in docs/v0-findings.md. Core rule: ambiguities never auto-resolve on silent agreement; matching code and behavior without a stated reason becomes a question. Prior research found rebuild pipelines score 0% behavioral equivalence without a verified feedback loop, 9-19% with a coarse one.
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