feat(mutils): conditional-normative-notation スキルを追加

[masseater]

概要

mutils プラグインに mutils:conditional-normative-notation スキルを追加する。

エージェント向けの規約（AGENTS.md / CLAUDE.md / .claude/rules/**）を 曖昧さなく 書くための記法ガイド。散文の指示を次の2層に分解して記述する手順・例・チェックリストを提供する。

• 要求度キーワード層 — RFC 2119（MUST / MUST NOT / SHOULD / SHOULD NOT / MAY）
• 条件付きルール構造層 — IF: <条件>; THEN <キーワード>: <行動> のプロダクションルール

このリポジトリのルート AGENTS.md が既に採用しているこの記法を、再利用可能なスキルとして明文化したもの。

変更内容

• plugins/mutils/skills/conditional-normative-notation/SKILL.md（新規）
• plugins/mutils/AGENTS.md — component-list 自動生成テーブルの再生成（bun run docs）
• plugins/mutils/plugin.json / .claude-plugin/marketplace.json — version bump（0.20.0 → 0.21.0、repository-lint/require-version-bump ルール準拠）

検証

• bun run check（eslint + oxfmt + turbo check）: green
• bun run check:docs / bun run check:plugin-list: green
• bun run test: green（94 tests）
• pre-push フック（build / typecheck / check / check:lockfile / test / knip）: green

関連 Issue

関連 Issue を検索したが、本スキルに対応する open Issue は存在しなかった（open は Dependency Dashboard のみ）。

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Introduced Conditional Normative Notation skill for writing unambiguous project agreements readable by agents, featuring enforcement keywords, conditional logic structures, priority handling, and quality validation guidelines.

• Chores

  • Bumped mutils plugin version to 0.21.0.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 01bf1c2c-b57d-4c69-b8b0-7ab458892733

📥 Commits

Reviewing files that changed from the base of the PR and between fa64bcc and 5b71d5e.

📒 Files selected for processing (4)

• .claude-plugin/marketplace.json
• plugins/mutils/AGENTS.md
• plugins/mutils/plugin.json
• plugins/mutils/skills/conditional-normative-notation/SKILL.md

📝 Walkthrough

Walkthrough

This PR releases mutils plugin version 0.21.0, introducing a new "Conditional Normative Notation" skill for expressing agent-readable project agreements. Version manifests are synchronized, the new skill is registered in the component list, and comprehensive skill documentation is provided defining RFC 2119–based conditional structures and validation patterns.

Changes

mutils 0.21.0 Release with Conditional Normative Notation Skill

Layer / File(s)	Summary
Version and manifest updates plugins/mutils/plugin.json, .claude-plugin/marketplace.json	Plugin version fields bumped from 0.20.0 to 0.21.0 across both the local plugin manifest and marketplace registry.
Skill component registration plugins/mutils/AGENTS.md	Auto-generated component list table updated to add the new mutils:conditional-normative-notation skill entry.
Conditional Normative Notation skill guide plugins/mutils/skills/conditional-normative-notation/SKILL.md	New documentation introduces a two-layer conditional normative notation system separating RFC 2119 enforcement keywords (MUST, MUST NOT, SHOULD, SHOULD NOT, MAY) from applicability conditions using IF: <condition>; THEN <keyword>: <action> structures, with guidance on condition composition, prioritization, and prose-to-rule conversion patterns.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 A new skill hops into view,
With rules and conditions crystal-true,
IF this, THEN that—no ambiguity!
Version bumped, the release takes flight,
Agent agreements, now written right! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: adding the conditional-normative-notation skill to the mutils plugin, which aligns with the primary objective and all changes in the PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch worktree-conditional-normative-notation-skill

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@plugins/mutils/skills/conditional-normative-notation/SKILL.md`:
- Line 12: The SKILL.md currently contains a bare `$ARGUMENTS` placeholder with
no explanation; update the document to either (1) document the expected runtime
arguments and format under an `argument-hint` or `Arguments` section—describe
names, types, optional/required, and parsing/rules consistent with other
SKILL.md files—or (2) remove the `$ARGUMENTS` line if this skill accepts no
runtime arguments; ensure you reference the `$ARGUMENTS` placeholder in the
change and mirror the same convention used by other skills for clarity.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 8c01487c-d58d-47f1-8ca1-0806adf98ecb

📥 Commits

Reviewing files that changed from the base of the PR and between f73feb3 and fa64bcc.

📒 Files selected for processing (4)

• .claude-plugin/marketplace.json
• plugins/mutils/AGENTS.md
• plugins/mutils/plugin.json
• plugins/mutils/skills/conditional-normative-notation/SKILL.md