Hooks
What vibecosystem 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 vibeeval/vibecosystem --agent claude-codeShips with vibecosystem. Installing the plugin gets these hooks.
What fires, and when
PreToolUse
- Runs pre-tool-use-broadcast.mjs.
PreCompact
- Runs pre-compact-continuity.mjs.
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-banner.mjs.
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 intent-classifier.mjs.
PostToolUse
- Runs typescript-preflight.mjs.
Stop
- Runs magic-doc-updater.mjs.
SessionEnd
- Runs session-end-cleanup.mjs.
Where it lives
- hooks/vitest.config.tsGitHub
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.
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Repo: vibeeval/vibecosystem