startup-hook-skill

You can automate dependency installation by creating a SessionStart hook script, placing it in the .claude/hooks directory, and registering it in .claude/settings.json. This ensures tests and linters run reliably in your web sessions.

A SessionStart hook is a script that executes during session initialization to prepare your repository environment. You need one to ensure dependencies are installed automatically, enabling reliable test and lint startup across different environments.

To set up a startup hook, analyze your project dependencies, design the hook script, place it in .claude/hooks, register it in .claude/settings.json, and validate the hook, linter, and tests end-to-end across your environments.

Yes, setting up startup hooks involves a structured workflow that includes environment variable guidance and synchronization checks. This ensures your repository initialization remains reproducible and correctly configured across environments.

The best way to ensure reproducible startup environments is to use a guided workflow for dependency discovery, hook design, and validation. This structured approach enforces reliable repository initialization and consistent session setup.

Tests and linters often fail because dependencies are not installed at session start. Creating a SessionStart hook to automatically install dependencies ensures the repository environment is fully prepared before tests execute.