Replace the lookahead-based pattern with separate allOf/not JSON Schema rules for quartet length, alphabet, padding and canonical pad bits. Share the runtime predicates with HAR and padded base64 parsing.
Validate converted advertised leaves with the MCP SDK validator, preserve permissive versus canonical semantics, and exercise every pattern near the 32 MiB encoded-input budget in all JavaScript modes.
Use the equivalent hex NUL spelling in named public contracts while preserving current path and reserved-name validation. Verify converted JSON Schema and real stdio catalog consumers.
Closes#1329
Co-authored-by: Yi-111-a <97448247+Yi-111-a@users.noreply.github.com>
trace_dylib_resolution roots and capture_process_scenario environment
names still advertised negative look-ahead patterns. RE2 and Rust schema
validators reject look-around, so a client using one refuses the whole
tools request, as #1282 reported for the NUL escape. Spell both
constraints as equivalent look-around-free patterns and assert that no
advertised pattern uses look-around or backreferences.
Closes#1282
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Preserve NUL rejection while avoiding the short escape rejected by strict
schema consumers. Guard the entire advertised input/output catalog and all
three JavaScript regexp modes.
Assisted-by: Kogasa (gensokyo-skills:kogasa-surprise-testing)
* fix: emit v-mode-compatible patterns for tool schemas
Character classes in emitted patterns carried unescaped '-', '/' and '['. Annex-B and u-mode accept them, so REA's own Zod validation (u) and every u-based validator never saw a defect, but v-mode rejects ClassSetSyntaxCharacters and Ruby rejects [^s[]]. With 6.1.0 tools/list, 117 pattern fields across 11 tools were rejected under v.
The characters are escaped as \x2d, \x2f, \x5b and \x5d rather than \-/\//\[, because oxlint --fix removes an escaped '-' inside a character class as a useless escape, so an escape-only change does not survive the pre-commit hook. \x2d-style escapes are valid under Annex B, u and v, are matched identically, and are not useless-escape candidates.
22 pattern literals in 18 files are touched; no other token changes.
* fix: replace the Zod offset pattern and guard the advertised catalog
The offset datetime site projected Zod's offset class as [ +- ], which no escape in this repository's sources can reach, so evaluate_reconstruction_coverage stayed unreachable for exactly the clients this change targets. It now uses offsetDateTimeSchema in src/domain/offsetDateTime.ts: the same accepted set with the offset class escaped as [ +\x2d ].
Adds tests/boundary/mcp/advertisedPatternsVMode.test.ts, which performs the real tools/list projection, traverses every advertised input and output schema, compiles each pattern under v, and asserts the inventory it walked so a silent traversal collapse fails instead of passing vacuously.
morluto