Reference
Settings
Environment variables that change how Quack behaves.
All settings are optional environment variables. Set them in your shell or in
the env block of Claude Code's settings.
| Variable | Default | Meaning |
|---|---|---|
QUACK_COMPACT_AT | 100000 | Show the chat-size reminder every this many tokens. |
QUACK_BIG_FILE_LINES | 400 | Files this long get the big-file hint before a whole read. |
QUACK_CACHE_TTL_MIN | auto | Cache lifetime in minutes. Auto: 60 when the transcript shows 1-hour cache writes, otherwise 5. |
QUACK_DEBUG | off | 1 prints hook errors instead of staying silent. |
QUACK_NO_PING | off | 1 turns off the install ping. DO_NOT_TRACK=1 works too. |
Example in ~/.claude/settings.json: