Hooks
What context-monitor runs automatically, and when. A hook is a command Claude Code fires at a fixed moment, without you asking for it.
$ npx -y skills add fomyio/claude-context-monitor --agent claude-codeShips with context-monitor. Installing the plugin gets these hooks.
What fires, and when
SessionStart
Fires once when a session begins, and again after a context compaction. It is where a plugin sets up its environment, or restores state the compaction dropped.
- Runs session-init.sh.
UserPromptSubmit
Fires before Claude sees each prompt you send. A plugin can use it to inject context, so the same instruction reaches the model every turn instead of only at session start.
- Runs check.sh.
Stop
- Runs update-state.sh.
PreCompact
- Runs pre-compact.sh.
PostCompact
- Runs post-compact.sh.
Where it lives
- hooks/check.shGitHub
- hooks/post-compact.shGitHub
- hooks/pre-compact.shGitHub
- hooks/session-init.shGitHub
- hooks/update-state.shGitHub
Read the script before you install anything that runs on your machine. This is the one part of a plugin that acts without being asked.
A Claude Code plugin that watches your context window in real-time, predicts when you'll hit the limit, and tells you before it's too late.
Repo: fomyio/claude-context-monitor