---
title: "PreCompact"
description: "Hooks triggered on PreCompact events (4 hooks)."
canonical: "https://orchestkit.yonyon.ai/docs/reference/hooks/pre-compact"
---

# PreCompact

Hooks triggered on PreCompact events (4 hooks).

# PreCompact Hooks

**4 hooks** registered for the `PreCompact` lifecycle event.

| Hook | Matcher | Behavior | Description |
|------|---------|----------|-------------|
| `pre-compact-guard` | `*` | Blocks | PreCompact Guard (CC 2.1.105) |
| `pre-compact-task-done-prompt` | `*` | Blocks | PreCompact Task-Done Prompt, Issue #1469 (extended by M119 dogfood cluster) |
| `pre-compact-saver` | `*` | Silent | PreCompact Saver, Compaction-Aware Memory Architecture CC 2.1.25+: Preserves critical context before context compaction. |
| `webhook-forwarder` | `*` | Fire-and-forget | Registered for every CC event type in hooks.json (async: true). Delegates to telemetry.emit() which fans out to pluggable sinks (JSONL local + HTTP remote). No-op when no sinks are active. |