/**
 * after_tool_call hook — self-learning via tool event ingestion.
 *
 * Every tool call is sent to engram's /api/events/ingest endpoint so that
 * the server can extract patterns and update its observation store over time.
 * This is fire-and-forget: the hook never blocks on a response.
 */
import type { EngramRestClient } from '../client.js';
import type { PluginConfig } from '../config.js';
import type { AfterToolCallEvent, PluginHookContext, PluginLogger } from '../types/openclaw.js';
/**
 * Handle the after_tool_call hook.
 *
 * @param event  - The after_tool_call event from OpenClaw.
 * @param ctx    - The hook context containing agent identity fields.
 * @param client - Shared engram REST client.
 * @param config - Resolved plugin config.
 */
export declare function handleAfterToolCall(event: AfterToolCallEvent, ctx: PluginHookContext, client: EngramRestClient, config: PluginConfig, logger?: PluginLogger): void;
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