thanhnvandClaude Opus 4.8
ac40c0b281
A1 (V1): CASAN_SECURITY_STRICT=1 makes semantic classification REQUIRED and fail-closed — model unavailable/no-verdict → BLOCK, never a silent SKIP. Non-strict CASAN_SEMANTIC_CLASSIFY=1 keeps regex verdict but logs SEMANTIC_SKIPPED loudly (sourced casan-log.sh). Default (no flags) unchanged. A2 (V3/V4): unicode-normalize.py (NFKC + zero-width strip + Cyrillic/Greek homoglyph fold) and decode-suspicious.py (base64/hex decode + rescan, printable filter to avoid false positives) feed new match_either/secret_match haystacks. Blocks homoglyph, zero-width, fullwidth, base64/hex-smuggled injection & secrets. A3 (V7): tool-output-scan.sh scans tool output for injection/secret before it re-enters model context; wrapper runs it after H6-exec (mode off|warn|block, strict→block). warn is default to preserve benign-draft behaviour. Baseline preserved: run-casan4 35/35, adversarial 44/44. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>