PreCompact hook not triggered when /compact command runs

Description

The PreCompact hook configured in ~/.claude/settings.json is not being triggered when the /compact command is executed.

Environment

• User type: Claude Max subscriber
• OS: Ubuntu Linux 6.8.0-88-generic
• Claude Code version: Latest (as of Dec 10, 2025)

Configuration

The hook is properly configured in ~/.claude/settings.json:

"PreCompact": [
  {
    "matcher": "*",
    "hooks": [
      {
        "type": "command",
        "command": "/home/mputz/.claude/hooks/v2/pre-compact.sh"
      }
    ]
  }
]

Expected Behavior

When /compact is run, the pre-compact.sh script should execute before compaction occurs, outputting checkpoint information to the terminal.

Actual Behavior

• /compact runs and shows: [2mCompacted (ctrl+o to see full summary)[22m
• The PreCompact hook is not invoked
• No new recovery checkpoint is created in ~/.claude/recovery/
• Running /hook:status confirms the hook is configured, but it doesn't execute

Verification Steps

1. Hook script exists and is executable:

``
-rwx--x--x 1 mputz mputz 2635 Nov 29 13:30 /home/mputz/.claude/hooks/v2/pre-compact.sh
``

1. Hook runs correctly when invoked manually:

``bash
$ /home/mputz/.claude/hooks/v2/pre-compact.sh
═══════════════════════════════════════════════════════
PRE-COMPACT SAFETY CHECKPOINT
Time: 2025-12-10T11:39:14-05:00
═══════════════════════════════════════════════════════
✓ Environment saved
✓ Working directory saved
✓ Recovery manifest created
``

1. Recovery directory shows last checkpoint was from earlier session (02:21 AM), not from the /compact that just ran (11:35 AM):

``
$ ls -lt ~/.claude/recovery/ | head -3
-rw-r--r-- 1 mputz mputz 404 Dec 10 02:21 manifest-20251210-022122.json
``

Impact

PreCompact hooks are useful for creating recovery checkpoints before context compaction. Without this hook firing, users lose the ability to save state before compaction occurs.