scan_campaign() validated completion and result hashes but trusted the artifact inventory in attempt.json. Changed bytes, a missing worker log, or an unlisted extra file therefore remained status=complete even though phase timing and lifecycle evidence no longer matched the recorded attempt.
Add validate_attempt_artifacts() in scripts/run-benchmark-campaign.py. Completed attempts now require matching cell identity and status, then rebuild the recursive artifact inventory and compare every relative path, byte count, SHA-256, file count, and total byte count. Completions without an attempt field retain historical hand-authored-plan compatibility.
Add changed, missing, and unlisted artifact regressions in tests/test_benchmark_campaign.py and document audit-only re-inventory in docs/BENCHMARK_CAMPAIGN.md. Verification: 135 benchmark/campaign/report unittests passed; Ruff, scripts/check-source-safety.sh, and git diff --check passed. Strict audit-only scans rehashed 39 capability cells, 9 semantic cells, and 9 similarity cells with zero corrupt, missing, duplicate, or unplanned results.
Signed-off-by: Andrew Hundt <ATHundt@gmail.com>
Andrew Hundt
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