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/120-error-handling
- If any phase fails catastrophically (agent error, required file missing after agent run), **STOP** immediately and report: what phase failed, what file is missing, and what the user should do next. - Mechanic check failures continue to audit — they influence the decision but
> /plugin marketplace add heurema/signum> /plugin install signum@signum
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120-error-handling.mdError Handling
- If any phase fails catastrophically (agent error, required file missing after agent run), **STOP** immediately and report: what phase failed, what file is missing, and what the user should do next.
- Mechanic check failures continue to audit — they influence the decision but do not block Phase 3.
- If codex or gemini times out (`exit 124`) or returns a non-zero exit code, mark as unavailable and continue.
- **Never silently swallow errors.** All bash exit codes must be checked. If jq fails to parse a file, report it explicitly.
- If the synthesizer produces an invalid audit_summary.json, stop Phase 4 and report the problem.
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Ships withsignum
Signum is a contract-first proof gate for agentic software changes: it turns a task into a reviewed contract, executes against that contract, audits the result, and packages evidence that humans and CI can inspect.
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