rules-manager

name	rules-manager
description	Create and maintain agent rules in AGENTS.md and .agents/rules/. Use for project rules, conventions, constraints, rule indexes, or requests to add or optimize agent rules.
argument-hint	[init | add <rule-name> | optimize | task description]

<core_principle> Rules consume tokens on every agent run. Keep them minimal, specific, and discoverable.

Two-tier system:

• AGENTS.md — Always loaded. Acts as the index + universal rules.
• .agents/rules/*.md — Modular rule files for focused topics (changelog, testing, deployment, etc.).

CRITICAL invariant: Every file in .agents/rules/ must be referenced in AGENTS.md so agents know it exists. AGENTS.md without a reference = orphaned rule = invisible to agents. </core_principle>

<file_layout>

project-root/
├── AGENTS.md                  # Index + universal rules (always loaded)
└── .agents/
    └── rules/
        ├── changelog.md       # Rule for changelog management
        ├── testing.md         # Rule for tests
        └── deployment.md      # Rule for deployment

AGENTS.md must contain a ## Rules section listing each .agents/rules/*.md file with a one-line description. </file_layout>

<agents_md_template> Minimal AGENTS.md with rules index:

# Project Name

Short description (1-2 lines).

## Tech Stack

- [Non-obvious tech only]

## Commands

- `[dev]` - Dev server
- `[test]` - Run tests

## Rules

The detailed rules live in `.agents/rules/`. Read the relevant file before acting:

- **Changelog** - [.agents/rules/changelog.md](.agents/rules/changelog.md) - When/how to update CHANGELOG.md
- **Testing** - [.agents/rules/testing.md](.agents/rules/testing.md) - Test conventions and coverage
- **Deployment** - [.agents/rules/deployment.md](.agents/rules/deployment.md) - Deploy checklist

## Universal Rules

- [2-3 critical rules that apply everywhere]

The ## Rules section is the index. Each bullet = one file in .agents/rules/. The ## Universal Rules section holds short, project-wide constraints that don't deserve their own file. </agents_md_template>

<rule_file_template> Each .agents/rules/<name>.md should be focused, short, and actionable.

# [Rule Title]

Short purpose statement (1 line).

## When this applies

- [Specific triggers - what task/context loads this rule]

## Rules

- [Specific, actionable rule]
- [Another rule with example if format matters]

## Example

[3-5 line concrete example, only if needed]

Size target: 20-60 lines per rule file. If longer, split into multiple files. </rule_file_template>

<writing_rules> Be specific, never vague:

NO: "Update changelog properly"
YES: "Append entry to CHANGELOG.md under ## Unreleased before every PR. Format: - [type] description (#PR)"

Prohibitions beat positive guidance:

NO: "Try to write tests"
YES: "NEVER merge without a passing test for the changed behavior"

Emphasis hierarchy: CRITICAL > NEVER > ALWAYS > IMPORTANT

• Lead each section with the most critical rule
• Use bold + keyword for non-negotiables: **CRITICAL**: Never commit secrets

Do NOT include:

• Generic best practices ("write clean code", "DRY", "SOLID")
• Linter-enforced rules (ESLint, Prettier, Biome already do this)
• Things the agent discovers from the code (file structure, framework defaults)
• Marketing or vision statements
• Verbose paragraphs - one line is almost always enough </writing_rules>

/rules-manager init - Bootstrap AGENTS.md + .agents/rules/

When the argument contains init:

1. Detect project context - Read package.json or equivalent for name, stack, scripts.
2. Check existing files - If AGENTS.md or .agents/rules/ already exists, read them and ASK before overwriting.
3. Create skeleton - Write AGENTS.md with empty ## Rules index, ready to populate.
4. Create .agents/rules/ directory - Empty for now. New rules added via add workflow.

Target AGENTS.md size at init: under 40 lines.

/rules-manager add <name> - Add a new rule

When the argument starts with add:

1. Confirm name - Slugify (e.g., "changelog management" -> changelog). Ask user if unclear.
2. Read existing AGENTS.md - Confirm it exists. If not, run init first.
3. Ask the user for rule content - What does the rule enforce? When does it apply? Any examples?
4. Write .agents/rules/<name>.md - Use the rule file template. Keep it 20-60 lines.
5. Update AGENTS.md ## Rules section - Add a one-line bullet pointing to the new file:

   - **<Title>** - [.agents/rules/<name>.md](.agents/rules/<name>.md) - <one-line purpose>
   

6. Verify the link - Make sure the path in AGENTS.md exactly matches the created file.

CRITICAL: Step 5 is non-negotiable. A rule file without an index entry is invisible.

/rules-manager optimize - Audit and clean up

When the argument contains optimize:

1. Inventory - List AGENTS.md and every file in .agents/rules/.
2. Check the index - For each file in .agents/rules/, verify there's a matching bullet in AGENTS.md ## Rules. Flag missing entries.
3. Check for orphans - For each AGENTS.md bullet, verify the file exists. Flag broken links.
4. Apply bloat removal - For each rule file, remove:
   • Linter-enforced rules
   • Generic best practices
   • Verbose explanations (compress to one line)
   • Things derivable from code
5. Compress - Paragraphs to bullets, multi-line rules to single lines.
6. Show diff and ask before applying.

Target sizes:

• AGENTS.md: under 80 lines
• Each rule file: under 60 lines

Default - Add a rule based on description

When the argument is a free-form task (e.g., "add a rule about how we tag releases"):

1. Treat as add with auto-derived name.
2. Ask the user 1-2 clarifying questions if the rule scope is unclear.
3. Follow the add workflow.

<rules_for_this_skill>

• ALWAYS update AGENTS.md ## Rules index when creating a file in .agents/rules/
• NEVER create a rule file without confirming with the user what it should contain
• NEVER overwrite existing AGENTS.md or rule files without asking
• Default to short rule files (20-60 lines). Split if larger.
• When user asks "create a rule", default to creating a file in .agents/rules/ (not inline in AGENTS.md), unless the rule is 1-2 lines and fits the universal section. </rules_for_this_skill>

<reference_guides>

• Examples: references/examples.md - Sample rule files (changelog, testing, deployment)
• AGENTS.md vs CLAUDE.md: references/agents-vs-claude.md - When to use which format </reference_guides>