Regex deduplication

Toggle: enabledChecks.regex-dedup plus regexDedup config · Fix: autofix.regexDedup · Command: regex-dedup

Detects duplicate regex literals and supported constructor patterns. Safe fixes can extract file-local, non-stateful duplicates into CONFIG or REGEX constants. Set sharedModule to a repository-relative .mjs path to enable cross-file ESM factories, with a matching .d.mts declaration. Without it, fixes remain file-local.

Configure minimumCount, extensions, and ignoredFiles. Stateful regex flags and incompatible CommonJS consumers remain advisory because sharing can change behavior.

Before — the same non-stateful expression is constructed twice:

const first = /^terra-[a-z]+$/;
const second = /^terra-[a-z]+$/;

After — a supported local autofix creates one constant and reuses it:

const TERRA_A_Z_REGEX = /^terra-[a-z]+$/;
const first = TERRA_A_Z_REGEX;
const second = TERRA_A_Z_REGEX;

Exact generated identifiers depend on the pattern and names already used in the file.