/**
 * v0.5 §11.4 — Anthropic skills corpus round-trip regression.
 *
 * Goal: make sure `skill-parser.ts` is faithful to *real* Anthropic-shape
 * SKILL.md files, not just our own bundled 25. We exercise the parser
 * against an external fixture set in three modes:
 *
 *   1. Bundled fixtures in `test/fixtures/anthropic-corpus/*.md` — always
 *      checked. Hand-authored representatives of the Anthropic style; no
 *      network required. This is what CI uses.
 *   2. Cached fetched corpus in `test/.cache/anthropic-skills-<sha>/` —
 *      checked if present.
 *   3. Live `anthropics/skills` fetch — opt-in via
 *      `SOLOSQUAD_FETCH_EXTERNAL_CORPUS=1`. Skipped by default to keep CI
 *      deterministic (corpus may change between npm test runs and §13
 *      risk register flags this).
 *
 * For each file the regression checks:
 *   a) `parseSkillMd` succeeds
 *   b) `validateSkill` returns `ok: true` (Anthropic minimal must pass —
 *      no v0.5 extensions required)
 *   c) `writeSkillMd(parsed)` produces text equal (after CRLF normalize) to
 *      the input — byte-identical round-trip
 */
export interface CorpusFailure {
    path: string;
    reason: string;
}
export interface CorpusResult {
    ok: boolean;
    checked: number;
    failures: CorpusFailure[];
    sources: string[];
}
export declare function runCorpusRegression(opts?: {
    repo_root?: string;
    fetch_remote?: boolean;
}): Promise<CorpusResult>;