import type { AgentTool, AgentToolContext, AgentToolResult, AgentToolUpdateCallback } from "@oh-my-pi/pi-agent-core";
import * as z from "zod/v4";
import type { ToolSession } from ".";
import type { OutputMeta } from "./output-meta";
export interface CheckpointState {
    /** Number of in-memory messages at checkpoint (AFTER checkpoint tool result is appended) */
    checkpointMessageCount: number;
    /** Session entry ID at checkpoint (for session tree branching) */
    checkpointEntryId: string | null;
    /** Timestamp */
    startedAt: string;
}
declare const checkpointSchema: z.ZodObject<{
    goal: z.ZodString;
}, z.core.$strip>;
type CheckpointParams = z.infer<typeof checkpointSchema>;
declare const rewindSchema: z.ZodObject<{
    report: z.ZodString;
}, z.core.$strip>;
type RewindParams = z.infer<typeof rewindSchema>;
export interface CheckpointToolDetails {
    goal: string;
    startedAt: string;
    meta?: OutputMeta;
}
export interface RewindToolDetails {
    report: string;
    rewound: boolean;
    meta?: OutputMeta;
}
export declare class CheckpointTool implements AgentTool<typeof checkpointSchema, CheckpointToolDetails> {
    private readonly session;
    readonly name = "checkpoint";
    readonly label = "Checkpoint";
    readonly summary = "Create a git-based checkpoint to save and restore session state";
    readonly description: string;
    readonly parameters: z.ZodObject<{
        goal: z.ZodString;
    }, z.core.$strip>;
    readonly strict = true;
    readonly loadMode = "discoverable";
    readonly intent: (args: Partial<CheckpointParams>) => string;
    constructor(session: ToolSession);
    static createIf(session: ToolSession): CheckpointTool | null;
    execute(_toolCallId: string, params: CheckpointParams, _signal?: AbortSignal, _onUpdate?: AgentToolUpdateCallback<CheckpointToolDetails>, _context?: AgentToolContext): Promise<AgentToolResult<CheckpointToolDetails>>;
}
export declare class RewindTool implements AgentTool<typeof rewindSchema, RewindToolDetails> {
    private readonly session;
    readonly name = "rewind";
    readonly label = "Rewind";
    readonly summary = "Rewind to a previously created checkpoint";
    readonly description: string;
    readonly parameters: z.ZodObject<{
        report: z.ZodString;
    }, z.core.$strip>;
    readonly strict = true;
    readonly loadMode = "discoverable";
    readonly intent: () => string;
    constructor(session: ToolSession);
    static createIf(session: ToolSession): RewindTool | null;
    execute(_toolCallId: string, params: RewindParams, _signal?: AbortSignal, _onUpdate?: AgentToolUpdateCallback<RewindToolDetails>, _context?: AgentToolContext): Promise<AgentToolResult<RewindToolDetails>>;
}
export {};