A command that turns plain-language project rules into Claude Code hook settings. Hooks are commands that run automatically before or after selected agent actions.

Creating or updating hooks based on command-line rules or CLAUDE.md files, including checks before tools run and actions after they finish.

It removes the need to design hook events, tool matchers, commands, and configuration structure by hand.

How zxdxjtu/claudecode-rule2hook configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to zxdxjtu/claudecode-rule2hook. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/zxdxjtu/claudecode-rule2hook/main/.claude/commands/rule2hook.md

Clone the repo

git clone --depth 1 https://github.com/zxdxjtu/claudecode-rule2hook

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/commands/zxdxjtu/claudecode-rule2hook/rule2hook/github.svg)](https://agentmods.dev/commands/zxdxjtu/claudecode-rule2hook/rule2hook)

Your own site

<a href="https://agentmods.dev/commands/zxdxjtu/claudecode-rule2hook/rule2hook"><img src="https://agentmods.dev/badge/commands/zxdxjtu/claudecode-rule2hook/rule2hook/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/commands/zxdxjtu/claudecode-rule2hook/rule2hook"><img src="https://agentmods.dev/badge/commands/zxdxjtu/claudecode-rule2hook/rule2hook.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,642 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.01642
Opus 5.5	$0.00000	$0.00657
Sonnet 5.5	$0.00000	$0.00328
Haiku 4.5	$0.00000	$0.00164

Measured 2mo ago against content hash 434f85589d3a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rule2hook scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/commands/rule2hook.md · 216 lines

How it starts

The opening of the file, as written. The whole thing — 216 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Task: Convert Project Rules to Claude Code Hooks

You are an expert at converting natural language project rules into Claude Code hook configurations. Your task is to analyze the given rules and generate appropriate hook configurations following the official Claude Code hooks specification.

Instructions

If rules are provided as arguments, analyze those rules
If no arguments are provided, read and analyze the CLAUDE.md file from these locations:
- ./CLAUDE.md (project memory)
- ./CLAUDE.local.md (local project memory)
- ~/.claude/CLAUDE.md (user memory)
For each rule, determine:
- The appropriate hook event (PreToolUse, PostToolUse, Stop, Notification)
- The tool matcher pattern (exact tool names or regex)
- The command to execute
Generate the complete hook configuration following the exact JSON structure
Save it to ~/.claude/hooks.json (merge with existing hooks if present)
Provide a summary of what was configured

Hook Events

PreToolUse

When: Runs BEFORE a tool is executed
Common Keywords: "before", "check", "validate", "prevent", "scan", "verify"
Available Tool Matchers:
- Task - Before launching agent tasks
- Bash - Before running shell commands
- Glob - Before file pattern matching
- Grep - Before content searching
- Read - Before reading files
- Edit - Before editing single files
- MultiEdit - Before batch editing files
- Write - Before writing/creating files
- WebFetch - Before fetching web content
- WebSearch - Before web searching
- TodoRead - Before reading todo list
- TodoWrite - Before updating todo list
Special Feature: Can block tool execution if command returns non-zero exit code

PostToolUse

When: Runs AFTER a tool completes successfully
Common Keywords: "after", "following", "once done", "when finished"
Available Tool Matchers: Same as PreToolUse
Common Uses: Formatting, linting, building, testing after file changes

Read the full file on GitHub · 216 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 216 lines · 0 tokens per session scan A 434f85589d3a

Subscribe to this mod's changes

rule2hook is a command published in the GitHub repository zxdxjtu/claudecode-rule2hook (401 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,642 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents

rule2hook next to 6 commands from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
rule2hookzxdxjtu/claudecode-rule2hook	Command	401	1y ago	MIT	A	0	Claude Code
checklistgithub/spec-kit	Command	148k	yesterday	MIT	A	13	Claude Code
clarifygithub/spec-kit	Command	148k	yesterday	MIT	A	27	Claude Code
specifygithub/spec-kit	Command	148k	yesterday	MIT	A	13	Claude Code
analyzegithub/spec-kit	Command	148k	yesterday	MIT	A	26	Claude Code
convergegithub/spec-kit	Command	148k	yesterday	MIT	A	35	Claude Code
implementgithub/spec-kit	Command	148k	yesterday	MIT	A	14	Claude Code

claudecode-rule2hook: Command for Claude Code