mastering-hooks

Claude Code hooks are configured by defining interception rules in a hooks.yaml file to control PreToolUse, PostToolUse, and related events deterministically. This enables precise runtime behavior management across multiple projects.

Blocking dangerous actions during Claude Code runtime is best achieved by creating declarative hooks.yaml rules. These rules intercept events like PermissionRequest to execute validation scripts or prevent unsafe operations before they occur.

Context injection is accomplished by configuring hooks.yaml to trigger on specific Claude Code events. This deterministic runtime applies configured actions automatically, ensuring necessary context loads before tool execution without manual intervention.

Debugging and optimizing hooks.yaml rules involves using provided templates and references to test hook configurations against specific operations. This process isolates rule conflicts and refines event interception logic for safer code execution.

The Claude Code hooks runtime supports custom validation scripts for Write operations through declarative hooks.yaml patterns. You can test simple rules against operations to verify behavior and ensure deterministic execution before committing changes.

Inconsistent Claude Code hooks during installation often stem from incorrect hooks.yaml entrypoint formatting. Ensure the configuration includes proper frontmatter name and description, and verify the Rust-based runtime is initialized correctly before testing rules.