Rulvar API reference / @rulvar/core / formatCharacterValidator
Function: formatCharacterValidator()
function formatCharacterValidator(options?): FinishValidator;Defined in: packages/core/src/orchestrator/finish-validators.ts:1734
Rejects invisible Unicode format characters in the result text (RV1509, the eighteenth improvement plan). The seventeenth comparison run's answer carried five U+200B characters immediately before hidden-file citations, and every configured check passed: the citation pattern's boundary class simply excluded the invisible byte from the match, so the extracted citations were clean while the LITERAL text was not byte-identical to any repository path. A format character in a dossier is at best copy-paste rot and at worst a smuggling channel, so the default is to reject the whole category (Unicode Cf: zero-width spaces and joiners, the word joiner, the BOM, bidi controls, soft hyphens), each distinct character listed once with its codepoint, first index, occurrence count, and a short visible-context excerpt, so the repair turn can find the exact bytes. allow admits specific characters for hosts whose content legitimately needs them (bidi marks in RTL prose); every allow entry must itself be a single Cf character, refused typed otherwise (the RV610 posture: a typo in the allow list must not silently widen it). Purely textual and deterministic. Default name 'format-characters'.
Parameters
| Parameter | Type | Description |
|---|---|---|
options? | { allow?: readonly string[]; name?: string; } | - |
options.allow? | readonly string[] | Single Cf characters to admit; everything else still rejects. |
options.name? | string | - |