fix(malicious-scan): allow zero-width spaces in PR descriptions - #16
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Dependabot writes @<U+200B>name in PR descriptions to avoid mentions, which blocked every dependency bump on the zero-width rule. Remove U+200B from the description before the rules run, so it cannot split a phrase to slip past the prompt-injection rules. Other zero-width characters, and U+200B in the title, commit messages or code, still block. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ryanmelt
approved these changes
Oct 1, 2026
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Summary
@<U+200B>nameso people aren't pinged, and the scan blocked every dependency bump on thezero-widthrule (e.g. OpenC3/cosmos run 36786709915: 29 blocking findings, all U+200B in the description of cosmos#3968).metadata_scannow removes U+200B from the PR description before the rules run. It is removed rather than exempted, so it cannot split a phrase such as "ignore previous instructions" to slip past the prompt-injection rules.Test plan
test_zero_width_space_is_allowed_in_pr_description; all 86 tests intests/test_ai_review.pypassmetadata_scanon the real cosmos#3968 title and description: 0 findings🤖 Generated with Claude Code