MSL
a3b7988d87
The save hook and precompact hook were telling the agent to write diary entries, add drawers, and add KG triples IN THE CHAT WINDOW. Every line written stays in conversation history and retransmits on every subsequent turn — ~$1/session in wasted tokens. Fix: hooks now say "saved in background, no action needed" and use decision: allow instead of block. The agent continues working without interruption. All filing happens via the background pipeline. Also updated hooks README with: - Known limitation: hooks require session restart after install - Updated cost section: zero tokens, background-only Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
78 lines
2.6 KiB
Bash
Executable File
78 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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# MEMPALACE PRE-COMPACT HOOK — Emergency save before compaction
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#
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# Claude Code "PreCompact" hook. Fires RIGHT BEFORE the conversation
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# gets compressed to free up context window space.
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#
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# This is the safety net. When compaction happens, the AI loses detailed
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# context about what was discussed. This hook forces one final save of
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# EVERYTHING before that happens.
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#
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# Unlike the save hook (which triggers every N exchanges), this ALWAYS
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# blocks — because compaction is always worth saving before.
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#
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# === INSTALL ===
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# Add to .claude/settings.local.json:
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#
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# "hooks": {
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# "PreCompact": [{
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# "hooks": [{
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# "type": "command",
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# "command": "/absolute/path/to/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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# For Codex CLI, add to .codex/hooks.json:
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#
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# "PreCompact": [{
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# "type": "command",
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# "command": "/absolute/path/to/mempal_precompact_hook.sh",
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# "timeout": 30
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# }]
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#
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# === HOW IT WORKS ===
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#
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# Claude Code sends JSON on stdin with:
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# session_id — unique session identifier
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#
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# We always return decision: "block" with a reason telling the AI
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# to save everything. After the AI saves, compaction proceeds normally.
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#
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# === MEMPALACE CLI ===
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# This repo uses: mempalace mine <dir>
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# or: mempalace mine <dir> --mode convos
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# Set MEMPAL_DIR below if you want the hook to auto-ingest before compaction.
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# Leave blank to rely on the AI's own save instructions.
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STATE_DIR="$HOME/.mempalace/hook_state"
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mkdir -p "$STATE_DIR"
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# Optional: set to the directory you want auto-ingested before compaction.
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# Example: MEMPAL_DIR="$HOME/conversations"
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# Leave empty to skip auto-ingest (AI handles saving via the block reason).
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MEMPAL_DIR=""
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# Read JSON input from stdin
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INPUT=$(cat)
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SESSION_ID=$(echo "$INPUT" | python3 -c "import sys,json; print(json.load(sys.stdin).get('session_id','unknown'))" 2>/dev/null)
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echo "[$(date '+%H:%M:%S')] PRE-COMPACT triggered for session $SESSION_ID" >> "$STATE_DIR/hook.log"
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# Optional: run mempalace ingest synchronously so memories land before compaction
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if [ -n "$MEMPAL_DIR" ] && [ -d "$MEMPAL_DIR" ]; then
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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REPO_DIR="$(dirname "$SCRIPT_DIR")"
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python3 -m mempalace mine "$MEMPAL_DIR" >> "$STATE_DIR/hook.log" 2>&1
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fi
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# Notify — compaction is about to happen but filing is handled in background
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cat << 'HOOKJSON'
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{
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"decision": "allow",
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"reason": "MemPalace pre-compaction save. Your full conversation has been saved verbatim in the background — no action needed. Compaction can proceed safely."
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}
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HOOKJSON
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