/** Public surface of a finished slice. */
export interface SliceContract {
    readonly sliceId: string;
    readonly sessionId: string;
    readonly completedAt: string;
    /** Public exports (function / class / const / var names). */
    readonly exports: readonly string[];
    /** Public type names. */
    readonly types: readonly string[];
    /** Public function / method signatures, e.g. `"validateDag(dag: SliceDag): void"`. */
    readonly publicSignatures: readonly string[];
    /** Optional: which downstream slice IDs the contract is broadcast-ready for. */
    readonly broadcastTo?: readonly string[];
    /** SHA-256 hash of the contract payload (key-sorted, JSON-canonicalized). */
    readonly contractHash: string;
}
export type WriteContractInput = Omit<SliceContract, 'completedAt' | 'contractHash'> & {
    readonly completedAt?: string;
};
/** Thrown when contract IO fails. */
export declare class ContractStoreError extends Error {
    readonly code: "CONTRACT_STORE_ERROR";
    constructor(message: string);
}
export declare const CONTRACT_TTL_DAYS = 30;
/**
 * (older than CONTRACT_TTL_DAYS or already GC'd)? Mirrors
 * `isOrphanChannel` and `isOrphanDispatchRecord` so a future
 * `peaks sub-agent cleanup` umbrella can run all three sweeps
 * (shared channel + dispatch record + contract) in one pass.
 */
export declare function isOrphanContract(opts: {
    projectRoot: string;
    sessionId: string;
    sliceId: string;
    now?: Date;
}): boolean;
/** Resolve the contracts directory for a session. */
export declare function contractsDir(projectRoot: string, sessionId: string): string;
/** Resolve a single contract file path. */
export declare function contractPath(projectRoot: string, sessionId: string, sliceId: string): string;
/** Hash a contract payload. */
export declare function hashContract(c: WriteContractInput | SliceContract): string;
/**
 * Persist a slice's public contract. Returns the absolute path on disk.
 * Idempotent: re-writing the same contract overwrites in place.
 */
export declare function writeContract(projectRoot: string, sessionId: string, input: WriteContractInput): {
    path: string;
    contract: SliceContract;
};
/** Read a contract from disk. Returns null if missing. */
export declare function readContract(projectRoot: string, sessionId: string, sliceId: string): SliceContract | null;
/** List all contracts for a session. */
export declare function listContracts(projectRoot: string, sessionId: string): readonly SliceContract[];
/**
 * Format a prompt-injection block from a set of contracts. The block is a
 * stable, human-readable summary suitable for splicing into a downstream
 * slice's dispatch prompt.
 */
export declare function formatContractInjection(contracts: readonly SliceContract[]): string;