import { SessionManager } from '../core/session-manager.js';
/**
 * context_delta MCP tool — addresses issue #122.
 *
 * Given (sessionId, filePath, currentContent) this tool:
 *   1. Looks up the session from the SessionManager.
 *   2. Diffs the current content against the session's last snapshot of
 *      that file.
 *   3. Updates the session's file state.
 *   4. Returns a unified-diff delta — the caller can send ONLY the delta
 *      to the model instead of the whole file, which is the token win.
 *
 * On first invocation for a given filePath the full content is treated
 * as "the delta" (there is no baseline to diff against).
 */
export type ContextDeltaOperation = 'compute-delta' | 'seed' | 'clear';
export interface ContextDeltaOptions {
    operation: ContextDeltaOperation;
    sessionId: string;
    filePath: string;
    currentContent?: string;
}
export interface ContextDeltaResponse {
    success: boolean;
    error?: string;
    delta?: string;
    isBaseline?: boolean;
    originalSize?: number;
    deltaSize?: number;
    bytesSaved?: number;
}
export declare class ContextDeltaTool {
    private readonly sessionManager;
    readonly name = "context_delta";
    readonly description = "Compute a unified-diff delta between a file\u2019s previous session snapshot and its current content, so the model only receives what changed.";
    constructor(sessionManager: SessionManager);
    run(options: ContextDeltaOptions): ContextDeltaResponse;
    private computeDelta;
    private seed;
    private clear;
}
export declare const CONTEXT_DELTA_TOOL_DEFINITION: {
    name: string;
    description: string;
    inputSchema: {
        type: string;
        properties: {
            operation: {
                type: string;
                enum: string[];
                description: string;
            };
            sessionId: {
                type: string;
                minLength: number;
                description: string;
            };
            filePath: {
                type: string;
                minLength: number;
                description: string;
            };
            currentContent: {
                type: string;
                description: string;
            };
        };
        required: string[];
        additionalProperties: boolean;
    };
};
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