Rule Catalog

What it does

When your agent uses it

• Installing pre-built rules
• Browsing categories
• Writing custom rules
• Use hookify:writing-rules

Example prompts

• “/rule-catalog”

Requirements

• Python 3

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

1. 1Read the rule from skills/rule-catalog/rules/git/block-force-push.md
2. 2Write it to .claude/hookify.block-force-push.local.md
3. 3Confirm installation

What it can do on your machine

Read from SKILL.md and the folder at commit 9f3eb00. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • python3
  • python

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Rule Catalog loads about 1.6k tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 439 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~42

When it runs · the whole SKILL.md, loaded when a task matches

~1.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from athola/claude-night-market at commit 9f3eb00, republished under its MIT licence (© athola). 439 words, ~1,577 tokens.

name

rule-catalog

description

Browse hookify rule catalog. Use when installing pre-built rules or browsing categories. Do not use when writing custom rules; use hookify:writing-rules.

alwaysApply

false

category

hook-development

tags

hookify, rules, catalog, install, templates

estimated_tokens

1500

complexity

beginner

model_hint

fast

provides.patterns

rule-installation, rule-browsing

provides.infrastructure

rule-catalog

usage_patterns

browsing-rules, installing-rules

# Install a specific rule
Skill(hookify:rule-catalog) then install git:block-force-push

# Or use the Python installer for bulk operations
python3 plugins/hookify/scripts/install_rule.py git:block-force-push
python3 plugins/hookify/scripts/install_rule.py --category git
python3 plugins/hookify/scripts/install_rule.py --all

**Verification:** Run `git status` to confirm working tree state.
Install git:block-force-push

# Install single rule
python3 plugins/hookify/scripts/install_rule.py git:block-force-push

# Install all rules in category
python3 plugins/hookify/scripts/install_rule.py --category python

# Install all rules
python3 plugins/hookify/scripts/install_rule.py --all

# List available rules
python3 plugins/hookify/scripts/install_rule.py --list

# Install to custom directory
python3 plugins/hookify/scripts/install_rule.py git:block-force-push --target /path/to/.claude

**Verification:** Run the command with `--help` flag to verify availability.
skills/rule-catalog/
├── SKILL.md (this file)
└── rules/
    ├── git/
    │   ├── block-force-push.md
    │   ├── block-destructive-git.md
    │   ├── warn-risky-git.md
    │   └── warn-large-commits.md
    ├── python/
    │   ├── block-dynamic-code.md
    │   └── warn-print-statements.md
    ├── security/
    │   ├── require-security-review.md
    │   └── destructive-command-guard.md
    ├── workflow/
    │   ├── enforce-scope-guard.md
    │   └── require-spec-before-code.md
    └── performance/
        └── warn-large-file-ops.md

# Change action from warn to block
action: block

# Disable temporarily
enabled: false

# Modify pattern
pattern: your-custom-pattern

© athola, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 16 other files in plugins/hookify/skills/rule-catalog of athola/claude-night-market.

• SKILL.md
• rules/documentation/require-slop-scan-for-docs.md
• rules/documentation/warn-slop-in-markdown.md
• rules/git/block-destructive-git.md
• rules/git/block-force-push.md
• rules/git/warn-large-commits.md
• rules/git/warn-risky-git.md
• rules/performance/warn-large-file-ops.md
• rules/python/block-dynamic-code.md
• rules/python/warn-print-statements.md
• rules/security/destructive-command-guard.md
• rules/security/require-security-review.md
• rules/stewardship/campsite-check.md
• rules/workflow
• … and 3 more

Open the folder on GitHubat commit 9f3eb00