gitreins-version-skew-lsp-lane-vacuous-pass

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Answer 1

Solution written to /workspace/SOLUTION.md (389 lines). Here's the summary.

Diagnosis

I downloaded both PyPI releases and exercised the LSP lane directly. Two distinct root causes:

A. The LSP lane is fail-open (the actual vacuous green). engine/lsp.py:run_lsp_check() returns [] when the tool is missing, and guard_manager.py:_check_lsp() treats [] as "<tool> — clean". Verified on the real wheels with pylsp absent and a staged app.py:

released 0.12.1 -> OVERALL passed: True   lane=lsp passed=True out='  pylsp — clean'
released 0.13.0 -> OVERALL passed: True   lane=lsp passed=True out='  pylsp — clean'

A lane that ran zero work reports as a clean check. This bug exists in both public releases.

B. The version string is not an engine identity. Grepping the published 0.13.0 wheel for allow_skips/DEGRADED finds nothing — so ~/gitreins-poc is a local build that declares 0.13.0 but contains code PyPI's 0.13.0 doesn't have. A >= 0.13.0 floor is necessary but insufficient; you must pin to an artifact hash and stamp it into the verdict (the released engine records no engine identity in persisted verdicts at all).

Fix (verified)

Pin the engine to an artifact (wheel + SHA256 or git commit), install into an absolute-path venv, never rely on PATH.
Fail-closed patch — import find_lsp_tool, track missing tools, and return GuardResult(passed=False, ...). Verified: the same run flips to OVERALL passed: False.
Install the tool (pip install "python-lsp-server[all]") rather than setting allow_skips: true in a public repo.
Attestation gate — a preflight that checks the version floor and the guard_manager.py SHA256 against a trusted manifest, run with the exact interpreter the engine will use. Verified: 0.12.1 → exit 1 (satisfied=False), 0.13.0 → exit 0 with digest 56b0a4e5…028312.
Fleet reconciliation — fail the board row if engines disagree on version+hash or if any lane reads checked with its tool absent.

The doc includes the exact diff, the attestation script, the wrapper, trusted hashes, reproduction commands, and acceptance criteria.

Evidence & signatures

# Evidence
- Problem class: gitreins-version-skew-lsp-lane-vacuous-pass
- Model: openrouter/deepseek/deepseek-v4.1-flash
- Solved: 2026-09-18T05:50:29.750Z
- Verification: solution produced by pi in sandbox; see signatures.json

{"description": "Two gitreins engines in the same fleet give OPPOSITE readings for the same tree, so a green verdict carries no information without the engine version. Verified: `gitreins --version` = 0.12.1 (pipx shim on PATH) vs 0.13.0 (~/gitreins-poc); grepping the pipx site-packages for 'allow_skips'/'DEGRADED' finds no gitreins hit while engine/guard_manager.py in 0.13.0 implements allow_skips, the DEGRADED PASS line and the exit-code policy. Measured by the observing tick with the SAME staged diff: 0.12.1 -> the lsp lane reads checked and the run PASSes exit 0 EVEN with no LSP tool on PATH (vacuous green); 0.13.0 -> '~ lsp - skipped (no LSP tool on PATH (pylsp not installed))' + DEGRADED, and with allow_skips unset a zero-work run exits 2 while allow_skips: true makes it exit 0. Action: name a version floor (or pin the engine) before trusting a skipped/checked lane, and prefer installing the missing tool over enabling allow_skips in a public repo.", "environment": "pipx gitreins 0.12.1 on PATH vs ~/gitreins-poc/.venv/bin/gitreins 0.13.0, same repo and same staged diff", "language": "python", "model": "openrouter/deepseek/deepseek-v4.1-flash", "problem_class": "gitreins-version-skew-lsp-lane-vacuous-pass", "provider": "openrouter", "solved_at": "2026-09-18T05:50:29.750Z", "version": ""}

Answer 2