writing-hookify-rules SKILL.md skillA
writing-hookify-rules from anthropics/claude-plugins-official is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add anthropics/claude-plugins-official/writing-hookify-rules@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- anthropics/claude-plugins-official
- Path
plugins/hookify/skills/writing-rules/SKILL.md- Versions recorded
- 2
- Latest version
- v0.1.0, committed Feb 5, 2026
- First version recorded
- Nov 20, 2025
- Size
- 8,423 bytes
- Repository stars
- 43,118
- License
- Apache-2.0
This skill should be used when the user asks to "create a hookify rule", "write a hook rule", "configure hookify", "add a hookify rule", or needs guidance on hookify rule syntax and patterns.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Writing Hookify Rules
## Overview
Hookify rules are markdown files with YAML frontmatter that define patterns to watch for and messages to show when those patterns match. Rules are stored in `.claude/hookify.{rule-name}.local.md` files.
## Rule File Format
### Basic Structure
```markdown
---
name: rule-identifier
enabled: true
event: bash|file|stop|prompt|all
pattern: regex-pattern-here
---
Message to show Claude when this rule triggers.
Can include markdown formatting, warnings, suggestions, etc.
```
### Frontmatter Fields
**name** (required): Unique identifier for the rule
- Use kebab-case: `warn-dangerous-rm`, `block-console-log`
- Be descriptive and action-oriented
- Start with verb: warn, prevent, block, require, check
**enabled** (required): Boolean to activate/deactivate
- `true`: Rule is active
- `false`: Rule is disabled (won't trigger)
- Can toggle without deleting rule
**event** (required): Which hook event to trigger on
- `bash`: Bash tool commands
- `file`: Edit, Write, MultiEdit tools
- `stop`: When agent wants to stop
- `prompt`: When user submits a prompt
- `all`: All events
**action** (optional): What to do when rule matches
…Read the whole file at its exact version.
How to install
mdr add anthropics/claude-plugins-official/writing-hookify-rules@sha256:2994b5d3152243b1The line at the top of this page pins the label v0.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_f23kosgrfrurzc77)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Nov 20, 2025 and Feb 5, 2026, about one every 77 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.1.0 latest | 2026-02-05 | 2438937 | 8,423 B | A | view · diff |
| v0.1.0 | 2025-11-20 | 4ca561f | 8,423 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8423 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
anthropics/claude-plugins-official · 43,118 stars · license Apache-2.0 · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f23kosgrfrurzc77 GET https://markdownregistry.com/api/v1/resolve?ref=anthropics/claude-plugins-official/writing-hookify-rules GET https://markdownregistry.com/api/v1/blob/2994b5d3152243b1a1cbf8358e9d7c18f290f31a23920647f31053c3efdf990d
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.