Add Chinese documentation for custom skills development and reference guide

- Created a new document for custom skills development (`custom.md`) detailing the structure, creation, implementation, and best practices for developing custom CCW skills.
- Added an index document (`index.md`) summarizing all built-in skills, their categories, and usage examples.
- Introduced a reference guide (`reference.md`) providing a quick reference for all 33 built-in CCW skills, including triggers and purposes.

docs/skills/templates/review-report.md

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+# Review Report Template
+
+> 用途: 代码审查报告模板，用于 review-code 输出
+
+## 模板
+
+```markdown
+# Code Review Report
+
+> **Target**: {target-path}
+> **Generated**: {YYYY-MM-DD HH:MM}
+> **Reviewer**: {skill-name}
+> **Session**: {session-id}
+
+## Executive Summary
+
+| Metric | Value |
+|--------|-------|
+| **Overall Score** | {X/100} |
+| Files Reviewed | {N} |
+| Total Issues | {N} |
+| Critical | {N} |
+| High | {N} |
+| Medium | {N} |
+| Low | {N} |
+
+### Quality Grade
+
+{A/B/C/D}
+
+**Rationale**: 简要说明评分理由
+
+---
+
+## Dimensions Summary
+
+| Dimension | Score | Issues | Top Issues |
+|-----------|-------|--------|------------|
+| Correctness | {X/10} | {N} | [C] Issue 1, [H] Issue 2 |
+| Readability | {X/10} | {N} | [M] Issue 3 |
+| Performance | {X/10} | {N} | [H] Issue 4 |
+| Security | {X/10} | {N} | [C] Issue 5 |
+| Testing | {X/10} | {N} | [L] Issue 6 |
+| Architecture | {X/10} | {N} | [M] Issue 7 |
+
+---
+
+## Risk Areas Identified
+
+| Area | Risk Level | Files | Issues |
+|------|------------|-------|--------|
+| {area1} | {High/Medium/Low} | {file list} | {N} issues |
+| {area2} | {High/Medium/Low} | {file list} | {N} issues |
+
+---
+
+## Detailed Findings
+
+### Correctness: {X/10}
+
+**Summary**: 简要总结正确性方面的发现
+
+#### [C] {Issue Title}
+
+**Location**: `{file-path}:{line}`
+
+**Issue**: 问题描述（1-2 句话）
+
+**Severity**: Critical - 必须修复
+
+**Recommendation**:
+```typescript
+// Before (problematic)
+const code = "problematic code";
+
+// After (fixed)
+const code = "fixed code";
+```
+
+**Reference**: [specs/review-dimensions.md](specs/review-dimensions.md) - Correctness section
+
+---
+
+#### [H] {Issue Title}
+
+**Location**: `{file-path}:{line}`
+
+**Issue**: 问题描述
+
+**Severity**: High - 应该修复
+
+**Recommendation**:
+```typescript
+// Fix suggestion
+const fixedCode = "fixed code";
+```
+
+---
+
+### Readability: {X/10}
+
+**Summary**: 简要总结可读性方面的发现
+
+#### [M] {Issue Title}
+
+**Location**: `{file-path}:{line}`
+
+**Issue**: 问题描述
+
+**Severity**: Medium - 建议改进
+
+**Recommendation**:
+```typescript
+// Suggestion
+const betterCode = "more readable code";
+```
+
+---
+
+### Performance: {X/10}
+
+**Summary**: 简要总结性能方面的发现
+
+#### [H] {Issue Title}
+
+**Location**: `{file-path}:{line}`
+
+**Issue**: 问题描述
+
+**Severity**: High - 影响性能
+
+**Recommendation**:
+```typescript
+// Optimization
+const optimizedCode = "optimized code";
+```
+
+---
+
+### Security: {X/10}
+
+**Summary**: 简要总结安全方面的发现
+
+#### [C] {Issue Title}
+
+**Location**: `{file-path}:{line}`
+
+**Issue**: 问题描述
+
+**Severity**: Critical - 安全风险
+
+**Recommendation**:
+```typescript
+// Security fix
+const secureCode = "secure code";
+```
+
+---
+
+### Testing: {X/10}
+
+**Summary**: 简要总结测试方面的发现
+
+#### [L] {Issue Title}
+
+**Location**: `{file-path}:{line}`
+
+**Issue**: 问题描述
+
+**Severity**: Low - 建议添加测试
+
+**Recommendation**:
+```typescript
+// Test example
+describe('Function', () => {
+  it('should handle edge case', () => {
+    // test code
+  });
+});
+```
+
+---
+
+### Architecture: {X/10}
+
+**Summary**: 简要总结架构方面的发现
+
+#### [M] {Issue Title}
+
+**Location**: `{file-path}:{line}`
+
+**Issue**: 问题描述
+
+**Severity**: Medium - 架构改进建议
+
+**Recommendation**:
+```typescript
+// Architecture suggestion
+// Consider using {pattern} instead
+```
+
+---
+
+## Recommendations
+
+### Priority Actions (Do First)
+
+1. **[Critical] Fix security vulnerability in {file}:{line}**
+   - Action: 修复 SQL 注入风险
+   - Estimate: 1 hour
+
+2. **[Critical] Handle null pointer in {file}:{line}**
+   - Action: 添加空检查
+   - Estimate: 30 minutes
+
+### High Priority (Do Soon)
+
+3. **[High] Optimize performance bottleneck in {file}:{line}**
+   - Action: 重构算法
+   - Estimate: 2 hours
+
+### Medium Priority (Do When Possible)
+
+4. **[Medium] Improve code readability in {file}:{line}**
+   - Action: 重构函数
+   - Estimate: 1 hour
+
+---
+
+## Appendix
+
+### Files Reviewed
+
+| File | Lines | Issues | Score |
+|------|-------|--------|-------|
+| {file1} | {N} | {N} | {X/10} |
+| {file2} | {N} | {N} | {X/10} |
+| {file3} | {N} | {N} | {X/10} |
+
+### Issue Distribution
+
+```
+Critical: ████ 4
+High:     ████████ 8
+Medium:   ████████████ 12
+Low:      ██████ 6
+```
+
+### Review Metadata
+
+| Key | Value |
+|-----|-------|
+| Review Duration | {X minutes} |
+| Review Method | {Quick Scan + Deep Review} |
+| Dimensions Covered | {All / Specific} |
+| Review Configuration | {config details} |
+
+---
+
+## Next Steps
+
+1. **Review this report**: 确认所有问题理解正确
+2. **Fix Critical issues**: 优先修复高风险问题
+3. **Run review-cycle**: 使用 `/review-cycle` 自动修复和验证
+4. **Re-review**: 修复后重新审查确认
+
+---
+
+**Generated by**: {skill-name} v{version}
+**Review Standards**: [specs/review-dimensions.md](specs/review-dimensions.md)
+```
+
+## 使用说明
+
+1. **触发**: review-code Phase 4
+2. **输入**: Phase 3 的 findings 数据
+3. **输出**: review-report.md
+4. **格式**: Markdown，支持 GitHub/GitLab 渲染
+
+---
+
+## 示例
+
+### 简化示例
+
+```markdown
+# Code Review Report
+
+> **Target**: src/auth/**
+> **Generated**: 2026-03-01 10:30
+> **Reviewer**: review-code
+
+## Executive Summary
+
+| Metric | Value |
+|--------|-------|
+| **Overall Score** | 65/100 |
+| Files Reviewed | 5 |
+| Total Issues | 15 |
+| Critical | 2 |
+| High | 4 |
+| Medium | 6 |
+| Low | 3 |
+
+### Quality Grade
+
+**C - Needs Improvement**
+
+存在 2 个严重安全问题需要立即修复
+
+---
+
+## Dimensions Summary
+
+| Dimension | Score | Issues |
+|-----------|-------|--------|
+| Correctness | 6/10 | 3 |
+| Readability | 7/10 | 2 |
+| Performance | 7/10 | 2 |
+| Security | 4/10 | 4 |
+| Testing | 5/10 | 2 |
+| Architecture | 6/10 | 2 |
+
+---
+
+## Detailed Findings
+
+### Security: 4/10
+
+#### [C] SQL Injection Risk
+
+**Location**: `src/auth/login.ts:45`
+
+**Issue**: 用户输入直接拼接 SQL，可被注入攻击
+
+**Severity**: Critical - 必须修复
+
+**Recommendation**:
+```typescript
+// Before (vulnerable)
+const query = `SELECT * FROM users WHERE id='${userId}'`;
+
+// After (safe)
+const query = 'SELECT * FROM users WHERE id = ?';
+await db.query(query, [userId]);
+```
+
+---
+
+### Correctness: 6/10
+
+#### [H] Null Pointer Risk
+
+**Location**: `src/auth/user.ts:23`
+
+**Issue**: user 对象可能为 null
+
+**Severity**: High - 可能导致崩溃
+
+**Recommendation**:
+```typescript
+// Add null check
+if (user?.profile) {
+  return user.profile.name;
+}
+return 'Anonymous';
+```
+
+---
+
+## Recommendations
+
+### Priority Actions
+
+1. **[Critical] Fix SQL injection in login.ts:45**
+   - Use parameterized queries
+   - Estimate: 1 hour
+
+2. **[Critical] Add null check in user.ts:23**
+   - Add optional chaining
+   - Estimate: 15 minutes
+```