/**
 * ADR-121 Phase 24 — Multi-signer ledger tests.
 *
 * Covers:
 *  - Backward compat: existing single-signer entries still verify at minSignatures=1
 *  - coSign() doesn't change contentHash (chain integrity preserved)
 *  - Multiple co-signatures accumulate
 *  - Threshold verification (1-of-N, 2-of-N, M-of-N)
 *  - Invalid cosignature detected (forged signature, mismatched key)
 *  - verifyCosignatureAgainst standalone helper
 *  - Backward compat at ledger level: 9-entry single-sig ledger still verifies
 */
export {};
//# sourceMappingURL=multisig-ledger.test.d.ts.map