Add encoded-payload-redact rule#117
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…tion Walks text nodes for long base64 / base64url / hex / percent-encoded runs above per-encoding length floors that sit above SHA-512 hex, then qualifies each candidate on a decoded printable-ASCII ratio so hashes, fingerprints, and binary blobs pass through while readable instructions are redacted. JWTs are skipped so the more specific secrets-redact label wins on overlap. Matches become inline click-to-reveal placeholders. Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
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Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
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Summary
encoded-payload-redactrule: walks text nodes for long base64 / base64url / hex / percent-encoded runs, qualifies on a decoded printable-ASCII ratio (≥0.85), replaces matches with click-to-reveal placeholders. Defends against the "decode this and follow it" indirect-injection carrier where an attacker drops an encoded blob in a page region the agent reads.secrets-redactkeeps the more specific[jwt hidden]label.Test plan
bun run testinextension/— 974/974 pass, including 12 new tests covering positives (b64, b64url, hex, %-enc), false-positive guards (SHA-256, Git SHA, random hex, short b64, JWT, script/style/noscript), watcher rescan, and teardown.bun run checkclean inextension/anddemo-site/.bun run buildclean in both packages./product/p-headphones-1on the demo, confirm "Compatibility codes" section's base64 string is replaced with the placeholder chip.🤖 Generated with Claude Code