Building a Hook-Driven Development Loop
Individual hooks are useful. A composed hook stack turns Claude Code from a tool into a system. This article builds a complete hook configuration for a TypeScript project — from blocking bad commits to enforcing test coverage to shipping Slack notifications.
Quick Reference
- →A hook stack is multiple hooks composing to enforce an entire development workflow
- →PreToolUse: gate dangerous commands before they run
- →PostToolUse Edit: format → lint → type-check on every file edit
- →PostToolUse Bash: run tests after editing, notify on build success
- →Stop: full test suite + macOS/Slack notification when Claude finishes
- →SessionEnd: commit session log for cross-session continuity
- →Performance: use the if field to avoid firing hooks on unrelated events
- →The compounding effect: hooks enforce discipline without manual review
Hooks as a System, Not One-Offs
Most developers configure one or two hooks. A PreToolUse script to block force-push. A PostToolUse format hook. Each one is useful. But the real leverage comes from composing hooks into a coherent system — where every part of the development loop has an automated gate or side effect.
The difference between a Claude Code session and a Claude Code pipeline is hooks. Without them, Claude edits files and you review manually. With a complete hook stack, Claude writes code that is automatically formatted, type-checked, tested, and committed — and dangerous actions are blocked before they run, regardless of what Claude was instructed to do.
A hook-driven pipeline doesn't mean Claude is running unattended. It means the quality gates and automation that normally require manual setup are built into every session. You're still directing Claude — but the hooks enforce standards so you don't have to check each output manually.