/**
 * The 5-state machine for the pi-context-optimizer plan→review→execute→walkthrough loop.
 *
 *   INERT --/plan--> RESEARCHING --model.write_plan--> PLAN_DRAFTING --writes plan.md--> REVIEW_PENDING
 *   REVIEW_PENDING <--/reject-- (PLAN_DRAFTING)  |  <--approval=approved--> EXECUTING --all done + write_walkthrough--> INERT
 *
 * State lives in-memory in the extension; it is persisted into the session
 * JSONL via `pi.appendEntry("context-optimizer", …)` so `/resume` rebuilds it in
 * `session_start`. The single source of truth at runtime is the `AgState`
 * object here; the `status.json` file is the *human-readable* mirror that the
 * file-watch and the VS Code approve/reject commands both write to.
 */
export type AgPhase = "INERT" | "RESEARCHING" | "PLAN_DRAFTING" | "REVIEW_PENDING" | "EXECUTING";
export type Approval = "none" | "pending" | "approved" | "rejected";
export interface AgState {
    phase: AgPhase;
    artifactDir: string | null;
    interview: boolean;
    dispatcherActive?: boolean;
}
export interface AgPersisted {
    phase: AgPhase;
    artifactDir: string | null;
    interview: boolean;
    dispatcherActive?: boolean;
}
export declare function defaultState(): AgState;
export declare function toPersisted(s: AgState): AgPersisted;
export declare function fromPersisted(p: AgPersisted | undefined): AgState;
/** status.json shape — the human/VS-Code-facing mirror. */
export interface StatusFile {
    phase: AgPhase;
    approval: Approval;
    reason?: string;
    done: number;
    total: number;
    updatedAt: string;
}
export declare function initialStatusFile(phase: AgPhase, total?: number, done?: number): StatusFile;
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