117 lines
3.3 KiB
Markdown
117 lines
3.3 KiB
Markdown
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# Auto-Save Hooks
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Two hooks for Claude Code and Codex that automatically save memories during work. No manual "save" commands needed.
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## What They Do
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| Hook | When It Fires | What Happens |
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|------|--------------|-------------|
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| **Save Hook** | Every 15 human messages | Blocks the AI, tells it to save key topics/decisions/quotes to the palace |
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| **PreCompact Hook** | Right before context compaction | Emergency save — forces the AI to save everything before losing context |
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The AI does the actual filing — it knows the conversation context, so it classifies memories into the right wings/halls/closets. The hooks just tell it **when** to save.
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## Install — Claude Code
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Add to `.claude/settings.local.json`:
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```json
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{
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"hooks": {
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"Stop": [{
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"matcher": "*",
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"hooks": [{
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"type": "command",
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"command": "/absolute/path/to/hooks/mempal_save_hook.sh",
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"timeout": 30
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}]
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}],
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"PreCompact": [{
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"hooks": [{
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"type": "command",
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"command": "/absolute/path/to/hooks/mempal_precompact_hook.sh",
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"timeout": 30
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}]
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}]
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}
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}
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```
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Make them executable:
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```bash
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chmod +x hooks/mempal_save_hook.sh hooks/mempal_precompact_hook.sh
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```
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## Install — Codex CLI
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Add to `.codex/hooks.json`:
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```json
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{
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"Stop": [{
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"type": "command",
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"command": "/absolute/path/to/hooks/mempal_save_hook.sh",
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"timeout": 30
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}],
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"PreCompact": [{
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"type": "command",
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"command": "/absolute/path/to/hooks/mempal_precompact_hook.sh",
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"timeout": 30
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}]
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}
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```
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## Configuration
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Edit `mempal_save_hook.sh` to change:
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- **`SAVE_INTERVAL=15`** — How many messages between saves. Lower = more frequent, higher = less interruption.
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- **`STATE_DIR`** — Where hook state is stored (defaults to `~/.mempalace/hook_state/`)
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- **`MEMPAL_DIR`** — Optional. Set to a conversations directory to auto-run `mempalace mine` on each save trigger.
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## How It Works
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### Save Hook (Stop event)
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```
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User sends message → AI responds → Stop hook fires
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↓
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Count human messages in transcript
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↓
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┌── < 15 since last save → let AI stop
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│
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└── ≥ 15 since last save → block + save
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↓
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AI saves to palace
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↓
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AI stops (flag set)
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```
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The `stop_hook_active` flag prevents infinite loops.
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### PreCompact Hook
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```
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Context window full → PreCompact fires → ALWAYS blocks → AI saves → Compaction proceeds
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```
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No counting needed — compaction always warrants a save.
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## Debugging
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```bash
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cat ~/.mempalace/hook_state/hook.log
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```
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Example output:
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```
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[14:30:15] Session abc123: 12 exchanges, 12 since last save
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[14:35:22] Session abc123: 15 exchanges, 15 since last save
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[14:35:22] TRIGGERING SAVE at exchange 15
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[14:40:01] Session abc123: 18 exchanges, 3 since last save
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```
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## Cost
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**Zero extra tokens.** The hooks are bash scripts that run locally. They don't call any API. The only "cost" is a few seconds of the AI organizing memories at each checkpoint.
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