/**
 * Graph Execution Engine v2 — `graph_approve` Tool Registration
 *
 * Version: 2.0
 * Date: 2026-07-25
 *
 * Phase C migration (Plan B), GAP-2 fill. The legacy orchestrator-facing
 * human-approval pair `dispatch_approve` / `dispatch_reject` has **no**
 * graph_* equivalent in the original seven-tool set — the engine exposes
 * `approveNode` / `rejectNode` only as internal `EngineRuntime` methods
 * (deprecation-map §3 rows 7–8 classify them "(engine-internal)"). This module
 * adds the thin, additive `graph_approve` surface that routes a parent-facing
 * approve/reject decision to the engine's public API import-only (protected
 * engine files are never modified).
 *
 * The arg schema mirrors the `GraphApproveArgs` shape exported by
 * `graph-tools.ts`. A single `action: "approve" | "reject"` discriminator
 * consolidates the two legacy tools into one surface; `reason` carries the
 * human rejection feedback and `payload` the optional approval output.
 *
 * ## Precedence contract
 *
 * This factory is additive. Its key is `graph_approve`, which does not collide
 * with any existing `graph_*` or legacy `dispatch_*` / `loop_*` tool key.
 * Registration therefore never overrides a legacy tool.
 *
 * Design reference: `.rolebox/design/tool-merge-map.md` §2.2, §3 (rows 7–8),
 * and `.rolebox/evidence/final-qa/phase-c-inventory.md` §6 GAP-2.
 */
import type { CanonicalToolDef } from "../../platform/types.ts";
import type { GraphToolSet, GraphApproveAction } from "./graph-tools.ts";
/** graph_approve — approve or reject a blocked needs_approval node. */
export declare function createGraphApproveTool(toolset: GraphToolSet): CanonicalToolDef;
export type { GraphApproveAction };
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