Fold TASK-54's fuzzer-found reject classes into the limitations contract - #41
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… the limitations contract
The known-limitations doc gains the fuzzer-found regex row (backrefs
outside classes, the stacked-quantifier grammar, nested repetition
products, whitespace bounds, class set-op lookalikes, Perl-class range
endpoints, capturing {0}, anchor-only patterns) and a new 'how this
document stays honest' section naming the three gate mechanisms (corpus
replay, executable twin, standing fuzzer). The twin suite grows 9
assertions covering the new classes — 39 tests total.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
ahrzb
approved these changes
Jul 27, 2026
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Bookkeeping required by the contract itself: the standing differential fuzzer (TASK-54, landed from a parallel session) found 12 new regex divergence classes and put them on the reject list — but
docs/known-limitations.mdand its executable twin didn't know about them yet, which violates the doc's own "if a message isn't in this document, that's a bug" rule.tests/test_known_limitations.pygrows 9 assertions covering the new classes (39 total, all green).🤖 Generated with Claude Code