export type SessionMode = "init" | "resume";
export interface SessionArtifact {
    sessionId: string;
    previousSessionId: string | null;
    mode: SessionMode;
    startedAt: string;
    endedAt: string | null;
    agentVersion: string;
    progress: {
        featuresAttempted: string[];
        featuresPassed: string[];
        featuresFailed: string[];
        summary: string;
    };
    environment: {
        workingDirectory: string;
        gitCommitHash: string | null;
        gitBranch: string | null;
        serverRunning: boolean;
        lastSmokeTestPassed: boolean;
        lastSmokeTestAt: string | null;
    };
    nextSession: {
        suggestedFirstAction: string;
        blockers: string[];
        nextFeatureId: string | null;
    };
    handoffNotes: string;
}
export declare class SessionBridge {
    private readonly artifactDir;
    private currentSessionId;
    private previousSessionId;
    private startedAt;
    private opened;
    constructor(artifactDir: string);
    /**
     * Called at the very start of any session.
     * Returns 'init' if no prior artifact exists, 'resume' if one does.
     */
    open(): Promise<{
        mode: SessionMode;
        artifact: SessionArtifact | null;
    }>;
    /**
     * Writes the artifact to disk at session end.
     * Throws if session was never opened.
     */
    close(progress: SessionArtifact["progress"], handoffNotes: string, environment?: Partial<SessionArtifact["environment"]>, nextSession?: Partial<SessionArtifact["nextSession"]>): Promise<SessionArtifact>;
    /**
     * Returns the last N artifacts for debugging/inspection.
     * Sorted newest first by timestamp (not by filename).
     */
    history(n?: number): Promise<SessionArtifact[]>;
    /**
     * Returns a compact string summary suitable for injecting into a new agent's context.
     * Deterministic and token-efficient.
     *
     * All artifact-sourced text is sanitized before injection.
     */
    contextSummary(): Promise<string>;
    private readAllArtifacts;
    private findLatestArtifact;
}
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