feat: initial companion repo for CC-024 Hooks

CLAUDE.md

@@ -0,0 +1,51 @@
+# Hooks: Run Code When Claude Code Acts
+
+## What this project is
+
+A companion repo for the From AI to Chitta article on **Hooks**
+(concept ID: `CC-024`). It contains working hook scripts and exercises
+that let you set up real guardrails and audit logging in Claude Code.
+
+Article: https://fromaitochitta.com/cc-024
+
+## How to use this
+
+1. Open Claude Code in this directory: `cd claude-code-hooks && claude`
+2. Work through exercises in order: `exercises/01-block-danger.md`, then 02, then 03
+3. Each exercise has concrete steps with expected output
+4. Compare your results to the expected output described in each exercise
+
+## What is configured
+
+- **Pre-tool-use hook** (`hooks/pre-tool-use.sh`): Blocks a set of dangerous
+  shell commands before Claude executes them. Reads JSON from stdin, matches
+  against blocked patterns, exits 2 to block or 0 to allow.
+- **Post-tool-use hook** (`hooks/post-tool-use.sh`): Logs every tool call to
+  `hooks/audit.log` with a timestamp, tool name, and input summary.
+- **Settings** (`.claude/settings.json`): Wires both hooks into Claude Code.
+
+## Code quality expectations
+
+- This is a learning repo. Clarity over cleverness.
+- Every exercise must run without modification on a clean clone
+- No external dependencies beyond Python 3 (standard on macOS)
+- If something does not work as expected, that is useful information: note it
+
+## Project structure
+
+```
+hooks/              pre-tool-use.sh, post-tool-use.sh, audit.log (generated)
+exercises/          Three numbered exercises with steps and expected output
+.claude/            settings.json with hook configuration
+CLAUDE.md           This file: project instructions
+README.md           Overview for anyone who clones this repo
+```
+
+## Domain
+
+Claude Code Automation
+
+## Memory
+
+Keep session notes in a local `MEMORY.md` (gitignored). This file
+(CLAUDE.md) is for instructions. MEMORY.md is for state.