chore: expose Claude Code skills for contributor access

.claude/agents/agent-code-reviewer.md

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+---
+name: code-reviewer
+description: PR/code review. 100% coverage, SSR safety, JSDoc validation.
+tools: Read, Grep, Glob
+model: sonnet
+---
+
+# Code Reviewer Agent
+
+An **orchestrator** that verifies code quality.
+
+## Role
+
+This agent does not make changes directly; instead, it coordinates the following skills:
+
+1. **code-reviewer** skill → Apply review checklist
+2. **jsdoc-guide** skill → Verify JSDoc completeness
+3. **library-api-design** skill → Verify API design principles
+
+## Orchestration Flow
+
+```
+[Code review request]
+    ↓
+[1. Identify changed files]
+    - git diff or read files directly
+    ↓
+[2. Run code-reviewer skill]
+    - Check test coverage
+    - Verify SSR safety
+    - Check edge cases
+    ↓
+[3. Reference jsdoc-guide]
+    - Verify required tags exist
+    - Validate example code
+    ↓
+[4. Reference library-api-design]
+    - Verify API consistency
+    - Check TypeScript types
+    ↓
+[5. Generate feedback]
+    - Output structured review results
+```
+
+## When to Use
+
+- "Review this code"
+- "Check this PR"
+- "Verify if this hook is okay"
+
+## Feedback Format
+
+```markdown
+## Great Work
+
+- What was done well
+
+## Required Changes
+
+1. **[Category]** Issue
+   - Why: reason
+
+## Next Steps
+
+1. Items to fix
+```

.claude/agents/agent-doc-writer.md

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+---
+name: doc-writer
+description: JSDoc and documentation writing. API documentation, example code generation.
+tools: Read, Write, Edit, Glob, Grep
+model: sonnet
+---
+
+# Documentation Writer Agent
+
+An **orchestrator** that writes documentation and JSDoc.
+
+## Role
+
+This agent does not write directly; instead, it coordinates the following skills:
+
+1. **doc-writer** skill → Documentation writing principles
+2. **jsdoc-guide** skill → JSDoc writing rules
+
+## Orchestration Flow
+
+```
+[Documentation writing request]
+    ↓
+[1. Analyze target files]
+    - Identify function/hook signatures
+    - Check existing JSDoc
+    ↓
+[2. Reference jsdoc-guide skill]
+    - Verify required tags
+    - Apply templates
+    ↓
+[3. Reference doc-writer skill]
+    - Clarity and completeness principles
+    - Example writing guide
+    ↓
+[4. Write JSDoc]
+    - @description, @param, @returns, @example
+```
+
+## When to Use
+
+- "Write JSDoc"
+- "Document this"
+- "Add example code"
+
+## Writing Principles
+
+1. **Clarity**: Minimize technical jargon
+2. **Completeness**: Cover all parameters and return values
+3. **Example-driven**: Copy-paste ready and immediately runnable
+4. **Consistency**: Maintain uniform formatting

.claude/agents/agent-git-helper.md

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+---
+name: git-helper
+description: Git commits and branch creation following repo conventions. Used when other agents delegate git tasks.
+tools: Bash, Read, Glob, Grep
+model: haiku
+---
+
+# Git Helper Agent
+
+A **lightweight orchestrator** that performs git operations following repo conventions.
+
+## Role
+
+This agent coordinates the following skills:
+
+1. **commit** skill → Commit message conventions
+2. **branch** skill → Branch naming conventions
+
+## Orchestration Flow
+
+### Creating a Commit
+
+```
+[Commit request]
+    ↓
+[1. Analyze changes]
+    - git status, git diff
+    ↓
+[2. Reference commit skill]
+    - Determine type and scope
+    - Generate message following conventions
+    ↓
+[3. Execute commit]
+    - git add, git commit
+```
+
+### Creating a Branch
+
+```
+[Branch request]
+    ↓
+[1. Confirm task details]
+    ↓
+[2. Reference branch skill]
+    - Determine branch type
+    - Generate English branch name
+    ↓
+[3. Create branch]
+    - git checkout -b
+```
+
+## When to Use
+
+- "Create a commit"
+- "Create a branch"
+- When other agents delegate git tasks
+
+## Cautions
+
+- Never commit sensitive files (.env, credentials)
+- Push only when explicitly requested
+- Never use --amend

.claude/agents/agent-scaffolder.md

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+---
+name: scaffolder
+description: Scaffold new Hooks/Components/Utils. Generate standard structure and boilerplate.
+tools: Read, Write, Edit, Bash, Glob, Grep
+model: sonnet
+---
+
+# Scaffolder Agent
+
+An **orchestrator** that creates new Hooks, Components, and Utils with a standard structure.
+
+## Role
+
+This agent does not implement directly; instead, it coordinates the following skills:
+
+1. **scaffolder** skill → File structure generation
+2. **jsdoc-guide** skill → JSDoc writing rules reference
+3. **development-workflow** skill → Overall workflow guide
+
+## Orchestration Flow
+
+```
+[User request]
+    ↓
+[1. Analyze requirements]
+    - Determine type (Hook/Component/Util)
+    - Validate name
+    ↓
+[2. Run scaffolder skill]
+    - Create folder structure
+    - Generate template files
+    ↓
+[3. Reference jsdoc-guide]
+    - Apply JSDoc standards
+    ↓
+[4. Register exports]
+    - Add to src/index.ts
+```
+
+## When to Use
+
+- "Create a useXxx hook"
+- "Create a new component"
+- "Add a utility function"
+
+## Cautions
+
+- Never overwrite existing files
+- Verify naming conventions are followed
+- Recommended to run tests after generation

.claude/skills/skill-branch/SKILL.md

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+---
+name: branch
+description: Create branches following repo conventions. Use when creating branches, starting new features.
+allowed-tools: Bash
+---
+
+# Git Branch Skill
+
+## Quick Start
+
+```bash
+/branch feat user-authentication  # → feat/user-authentication
+/branch fix login-error           # → fix/login-error
+/branch                           # interactive creation
+```
+
+## Core Patterns
+
+| Pattern            | Purpose        | Example                         |
+| ------------------ | -------------- | ------------------------------- |
+| `feat/{name}`      | New feature    | `feat/use-debounce`             |
+| `fix/{name}`       | Bug fix        | `fix/ssr-hydration-mismatch`    |
+| `chore/{name}`     | Config/build   | `chore/update-build-config`     |
+| `docs/{name}`      | Documentation  | `docs/add-use-toggle-example`   |
+| `refactor/{name}`  | Refactoring    | `refactor/cleanup-internals`    |
+
+## Execution Steps
+
+1. Confirm task details
+2. Determine the appropriate branch type
+3. Generate an English branch name (lowercase, hyphens)
+4. Run `git checkout -b {branch}`
+
+## Cautions
+
+- Branch names: lowercase English + hyphens only
+- Spaces are converted to hyphens
+- Korean descriptions are converted to English
+- Warn if there are uncommitted changes
+
+## References
+
+- [details.md](references/details.md) - Detailed branch naming guide

.claude/skills/skill-branch/references/details.md

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+# Git Branch Detailed Guide
+
+## Branch Types in Detail
+
+### feat (New Feature)
+
+```
+feat/{feature-name}
+```
+
+- Used when developing a new feature
+- Examples: `feat/use-debounce`, `feat/add-keyboard-height-hook`
+
+### fix (Bug Fix)
+
+```
+fix/{fix-description}
+```
+
+- Used when fixing a bug
+- Examples: `fix/ssr-hydration-mismatch`, `fix/scroll-direction-cleanup`
+
+### chore (Config/Build)
+
+```
+chore/{description}
+```
+
+- Used when changing build config, CI, dependencies, etc.
+- Examples: `chore/update-build-config`, `chore/add-changesets`
+
+### docs (Documentation)
+
+```
+docs/{description}
+```
+
+- Used when adding or modifying documentation
+- Examples: `docs/add-use-toggle-example`, `docs/update-contributing`
+
+### refactor (Refactoring)
+
+```
+refactor/{description}
+```
+
+- Used for code refactoring
+- Examples: `refactor/cleanup-internals`, `refactor/simplify-hook-logic`
+
+## Naming Conversion Rules
+
+| Input                          | Output                    |
+| ------------------------------ | ------------------------- |
+| user authentication feature    | user-authentication       |
+| SSR hydration error            | ssr-hydration-mismatch    |
+| update build config            | update-build-config       |
+
+## Cautions
+
+- No special characters allowed (only hyphens)
+- Avoid overly long branch names (3-4 words recommended)
+- If there are uncommitted changes, stash or commit before creating a branch

.claude/skills/skill-code-reviewer/SKILL.md

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+---
+name: code-reviewer
+description: PR/code review. 100% coverage, SSR safety, JSDoc validation. Use when reviewing code, checking PRs.
+allowed-tools: Read, Grep, Glob
+---
+
+# Code Reviewer
+
+Code reviewer for the react-simplikit project.
+
+## Quick Start
+
+```bash
+/code-reviewer  # Review current changes
+```
+
+## Review Checklist
+
+### Required Checks
+
+- [ ] 100% test coverage
+- [ ] SSR test exists (`renderHookSSR.serverOnly`)
+- [ ] JSDoc complete (@description, @param, @returns, @example)
+- [ ] TypeScript strict compliance
+
+### Code Quality
+
+- [ ] Zero dependencies maintained
+- [ ] No unnecessary re-renders
+- [ ] Edge cases handled
+
+### API Design
+
+- [ ] Intuitive API
+- [ ] Consistent patterns
+- [ ] Named exports used
+
+## Feedback Format
+
+```markdown
+## Great Work
+
+- What was done well
+
+## Required Changes
+
+1. **[Category]** Issue
+   - Current: `code`
+   - Suggested: `code`
+   - Why: reason
+
+## Next Steps
+
+1. Fix required changes
+2. Run tests
+3. Push updates
+```