v8.1.0 S2. security-assessment.md (two blobs, one split, plus the decoded
exfil command) and the base64 pipe-to-shell one-liner in
knowledge/skill-threat-patterns.md now describe the payload rather than
reproduce it. The entropy path-suppression test builds its 84-char blob
from 12-char fragments, so no contiguous decodable blob sits on disk.
av-surface: b 5->0. a=0 a2=0 b=0 c=0 d=0 - the probe is green.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Rule 4 in isFalsePositive ("test/fixture files intentionally contain
example secrets") matched /(test|spec|fixture|mock|__test__|__spec__)/i
against absPath — the ABSOLUTE path. Any directory name above the scan
root therefore silenced every entropy finding in the entire target: a
repo cloned to a CI workspace, checked out under a parent folder named
`testing`, or scanned from any path with one of those substrings
reported zero secrets and still exited status 'ok'. The failure is
silent — indistinguishable from a clean scan.
- isFalsePositive takes relPath and rule 4 keys off it. relPath was
already computed and passed down to scanFileContent; only the
suppression check was reading the wrong one.
- classifyFileContext keeps using absPath: it reads the basename
extension only, so directory names above the root cannot affect it.
- Rules 1-3 and 5-13 are untouched.
Regression test drives scan() end-to-end against temp roots named
llmsec-test-*, llmsec-spec-*, llmsec-fixture-* and llmsec-mock-*, with a
neutral-root control proving the payload is detectable, plus two
guards that genuine suppression still works (a *.test.mjs file and a
file under a relative tests/ directory).
npm test: 1879/1879 green (1872 + 7 new).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
