Summary

Disposition registry deep audit (2026-04-15) identified dead code that should be removed:

MBP Violations — Dead LLM Provider Code (~470 lines, zero callers)

These survived because they sit under INCLUDE parent directory rules (src/agents/, extensions/, src/plugin-sdk/) rather than having explicit per-file EXCLUDE-GUT dispositions.

Zero-Caller Stubs — Immediate GUT Candidates (66 files)

66 EXCLUDE-STUB entries in the disposition registry have zero live callers. The stubs serve no purpose — they can be deleted with no breakage. Full list from grep 'candidate for GUT' upstream/disposition.tsv in the HQ repo.

Key clusters:

• src/agents/ — 20+ dead stubs (Pi model resolver, bootstrap cache, identity file, model fallback, etc.)
• src/acp/ — 2 dead stubs (ACP manager utils)
• extensions/acpx/ — 2 dead stubs (config, runtime)
• src/secrets/ — 1 dead stub (provider env vars)

Acceptance Criteria

• All 6 MBP violation files deleted from fork
• All 66 zero-caller stubs deleted from fork
• Disposition registry updated: EXCLUDE-STUB → EXCLUDE-GUT for each deleted file
• pnpm check passes after deletion
• pnpm test passes after deletion (or tests referencing deleted stubs are also removed)

Notes

• These are all zero-blast-radius deletions — no alive code imports any of them
• The remaining 15 EXCLUDE-STUB entries with live callers are separate tracked debt
• Disposition registry already classifies them correctly; this issue is about executing the deletions in the fork

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