import type { ExtensionAPI } from "../sdk/coding-agent/index.js";
import { Runtime } from "./runtime.js";
/**
 * Session/branch memory layer.
 *
 * This layer owns the branch-scoped observational-memory pipeline:
 *   - the observer (`observer.ts` via `observer-trigger.ts`) extracts
 *     observations from new conversation turns;
 *   - the deterministic pruner (`deterministic-pruner.ts` via
 *     `compaction-hook.ts`) drops low-value observations at compaction time;
 *   - the summary render path (`compaction.ts`) produces the compacted memory
 *     that is persisted into `session_memory_snapshots`;
 *   - the snapshot persistence hooks (`compaction-hook.ts`,
 *     `compaction-trigger.ts`, `observer-trigger.ts`) keep that session memory
 *     alive across compactions.
 *
 * It is intentionally separate from `project-observation-memory.ts`, which
 * owns the per-machine + per-cwd, cross-session project observation store.
 */
export declare function registerSessionMemory(ext: ExtensionAPI, runtime: Runtime): void;
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