Add task fingerprint audit tool#231
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Summary
tools/task_fingerprint.pyto generate a deterministic SHA-256 manifest for a task directoryWhy
Recent stale-checkout investigations, such as #226, depend on proving that the instruction, tests, and data seen by an agent match the verifier snapshot. This utility gives harness operators a small repo-native way to record that snapshot before a sweep and compare it later without changing any canonical task specs.
Validation
python -m pytest tests\test_task_fingerprint.py -qpython tools\task_fingerprint.py tasks\13f-amendment-aware-crowding --indent 0 | python -c "import json,sys; d=json.load(sys.stdin); print(d['task_name'], d['file_count'], len(d['aggregate_sha256']))"python -m py_compile tools\task_fingerprint.py tests\test_task_fingerprint.pypython -m ruff check tools\task_fingerprint.py tests\test_task_fingerprint.pygit diff --check(only Windows line-ending warnings)