nextjs-app-router Expert

⚠️⚠️⚠️ MANDATORY PRE-EXECUTION CHECKLIST ⚠️⚠️⚠️

DO NOT SKIP THESE STEPS - Complete them in order before proceeding.

═══════════════════════════════════════════════

□ Step 1: Check if Documentation Exists

Action: Check if reference documentation file exists

ls -la .claude/skills/nextjs-app-router/references/external/nextjs-app-router-patterns.md 2>/dev/null && wc -w .claude/skills/nextjs-app-router/references/external/nextjs-app-router-patterns.md

Evaluate Result:

• ✅ File exists AND word count > 1000 → GO TO STEP 2 (Check freshness)
• ❌ File missing OR word count < 1000 → GO TO STEP 4 (Fetch from web)

---

□ Step 2: Check Documentation Freshness

Action: Read metadata to determine age

cat .claude/skills/nextjs-app-router/.skill-metadata.json | grep last_verified

Calculate Age:

Current date: 2025-11-12
Last verified: [value from metadata, or null if never verified]
Age in days: [calculate difference, or ∞ if null]

Evaluate Result:

• ✅ Age ≤ 30 days → GO TO STEP 3 (Documentation is fresh, ready to use)
• ⚠️ Age > 30 days OR null → GO TO STEP 4 (Refresh from web)

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□ Step 3: ✅ Documentation Ready - Proceed

Status: Documentation is fresh and ready to use.

Action: Skip to "Domain Knowledge" section below and apply nextjs-app-router expertise from: references/external/nextjs-app-router-patterns.md

---

□ Step 4: Fetch/Refresh Documentation from Web

Status: Documentation is missing, empty, or stale. Must fetch current information.

Step 4A: Detect Context

Read project context to make searches relevant:

cat .claude/core/context.yaml | grep -E "framework|database|auth"

Extract:

• Framework: [e.g., nextjs, django, rails]
• Database: [e.g., prisma, sequelize, sqlalchemy]
• Auth: [e.g., clerk, auth0, passport]

Step 4B: Execute Web Searches

Run ALL of these search queries and collect results:

Query Set 1: Official Documentation

WebSearch: "nextjs-app-router official documentation 2025"
WebSearch: "nextjs-app-router getting started guide 2025"

Query Set 2: Best Practices & Patterns

WebSearch: "nextjs-app-router best practices 2025"
WebSearch: "nextjs-app-router architecture patterns 2025"
WebSearch: "nextjs-app-router design principles"

Query Set 3: Common Pitfalls

WebSearch: "nextjs-app-router common mistakes to avoid"
WebSearch: "nextjs-app-router anti-patterns"
WebSearch: "nextjs-app-router gotchas and pitfalls 2025"

Query Set 4: Integration (Context-Specific)

If framework detected:

WebSearch: "nextjs-app-router [FRAMEWORK] integration best practices"

If database detected:

WebSearch: "nextjs-app-router [DATABASE] patterns"

If auth detected:

WebSearch: "nextjs-app-router [AUTH] integration"

Record: Save all URLs fetched for metadata

Step 4C: Synthesize Documentation

Create file: references/external/nextjs-app-router-patterns.md

Required Structure:

# nextjs-app-router Patterns & Best Practices

**Last Updated:** 2025-11-12
**Tech Version:** [from web search - e.g., "6.19.0"]
**Sources:**
- [List all URLs fetched]

---

## ⚠️ CRITICAL PATTERNS (Follow These)

[Extract 3-5 most important patterns from search results]

### Pattern 1: [Most Critical Pattern Name]

✅ **CORRECT APPROACH:**

[Code example showing the right way]

❌ **WRONG - Avoid This:**

[Code example showing common mistake]

**Why this matters:** [Explanation of consequences]
**When to use:** [Guidelines for application]

[Repeat for patterns 2-5]

---

## 🚫 COMMON MISTAKES (Avoid These)

[Extract top 5 mistakes from "pitfalls" searches]

### Mistake 1: [Most Common Error]
**Symptom:** [How it manifests]
**Why it's bad:** [Consequences]
**How to fix:** [Solution with code example]

[Repeat for mistakes 2-5]

---

## 🔧 INTEGRATION PATTERNS

### nextjs-app-router + [DETECTED_FRAMEWORK]
[Framework-specific integration examples if framework detected]

### nextjs-app-router + [DETECTED_DATABASE]
[Database integration patterns if database detected]

### nextjs-app-router + [DETECTED_AUTH]
[Auth integration patterns if auth detected]

---

## 📚 Quick Reference

[Create cheat sheet of 10-15 most common operations]

**Installation:**
```bash
[commands]

Basic Setup:

[code]

Common Operations:

2. ...

---

🔍 Troubleshooting

[Common errors and solutions from search results]

Error: [Error message] Cause: [Why it happens] Solution: [How to fix]

---

📖 Additional Resources

• Official Docs: [URL]
• Best Practices Guide: [URL]
• Community Resources: [URL]

**Quality Check:**
- Minimum 1500 words
- At least 3 critical patterns
- At least 5 common mistakes
- Integration examples for detected stack
- Code examples throughout

### Step 4D: Update Metadata

**Write to:** `.claude/skills/nextjs-app-router/.skill-metadata.json`

```json
{
  "skill_name": "nextjs-app-router",
  "tech_version": "[from web search]",
  "last_verified": "2025-11-12T10:32:28.710879",
  "age_days": 0,
  "status": "fresh",

  "search_metadata": {
    "queries_used": [
      "[list all search queries executed]"
    ],
    "sources_fetched": [
      "[list all URLs from web search]"
    ],
    "search_timestamp": "2025-11-12T10:32:28.710879",
    "search_engine": "WebSearch"
  },

  "content_metadata": {
    "word_count": [actual count],
    "patterns_count": [number of critical patterns],
    "mistakes_count": [number of common mistakes],
    "has_official_docs": true/false,
    "has_best_practices": true/false,
    "has_antipatterns": true/false,
    "has_integration_examples": true/false,
    "confidence": "high/medium/low"
  },

  "detected_context": {
    "framework": "[from context.yaml]",
    "database": "[from context.yaml]",
    "auth": "[from context.yaml]"
  }
}

Step 4E: Validation

Verify documentation was created successfully:

wc -w .claude/skills/nextjs-app-router/references/external/nextjs-app-router-patterns.md

Expected: Minimum 1500 words

If validation passes: ✅ Continue to Step 4F

If validation fails:

⚠️⚠️⚠️ DOCUMENTATION FETCH FAILED ⚠️⚠️⚠️

Attempted: 2025-11-12T10:32:28.710879
Word count: [actual] (required: 1500+)

**DO NOT PROCEED** without valid documentation.

Possible causes:
- Internet connection issues
- Web search returned poor results
- Official docs not found

**Recovery options:**
1. Check internet connection and retry Step 4
2. Manually search for: "nextjs-app-router official documentation"
3. If nextjs-app-router is very new/niche, consider:
   - Creating minimal patterns.md from official GitHub
   - Marking metadata as "low confidence"
4. Run repair script: `./bootstrapper/scripts/repair_skills.py --skill nextjs-app-router`

**If this is a critical blocker:** Ask user for nextjs-app-router documentation sources.

STOP HERE - Do not proceed without valid documentation.

Step 4F: Success - Documentation Fetched

✅ Documentation successfully created and validated.

NOW GO TO STEP 3 to use the fresh documentation.

═══════════════════════════════════════════════ END OF MANDATORY CHECKLIST ═══════════════════════════════════════════════

---

Domain Knowledge

Read from: references/external/nextjs-app-router-patterns.md

This section contains the comprehensive nextjs-app-router expertise fetched from web searches. Apply patterns and avoid anti-patterns documented above.

---

When to Use This Skill

Use this skill when:

• Working with nextjs-app-router in the codebase
• Implementing nextjs-app-router features or integrations
• Debugging nextjs-app-router-related issues
• Following nextjs-app-router best practices
• Architectural decisions involving nextjs-app-router

---

Quality Standards

After implementing nextjs-app-router changes, ensure:

• ✅ Configuration is valid
• ✅ Tests pass (if applicable)
• ✅ Build succeeds without errors
• ✅ Best practices from patterns.md followed
• ✅ No anti-patterns from mistakes section used
• ✅ Integration patterns applied correctly

Check against quality gates in .claude/core/gates.yaml

---

Skill Limitations

This skill covers:

• ✅ nextjs-app-router setup and configuration
• ✅ Common patterns and best practices
• ✅ Integration with detected stack
• ✅ Troubleshooting guidance
• ✅ Anti-patterns to avoid

This skill does NOT cover:

• ❌ Tasks outside nextjs-app-router domain
• ❌ Deprecated or outdated patterns
• ❌ Experimental/beta features (unless explicitly documented)
• ❌ Deep internals (unless found in official docs)

---

Maintenance (Automatic)

This skill is self-maintaining:

• ✅ Auto-checks freshness on each invocation
• ✅ Auto-refreshes if > 30 days old
• ✅ Tracks sources for reproducibility
• ✅ Adapts to project context

Manual maintenance (optional):

• Add project-specific patterns to references/
• Customize for specific use cases
• Override search queries in metadata if needed

---

Getting Help

If documentation is insufficient:

1. Run specific search: WebSearch: "nextjs-app-router [your specific topic] 2025"
2. Check official docs: [URL from sources in patterns.md]
3. Force refresh: Delete .skill-metadata.json and re-invoke skill
4. Manual update: Edit nextjs-app-router-patterns.md with additional patterns

---

Troubleshooting This Skill

Problem: Skill says documentation missing but file exists Solution: Check file size - might be empty or corrupted. Delete and retry Step 4.

Problem: Documentation feels outdated Solution: Check metadata age. If < 30 days but still feels stale, delete metadata to force refresh.

Problem: Web searches failing consistently Solution: Check internet connection. If offline, cannot use self-populating skills.

Problem: Documentation lacks context for my specific stack Solution: Re-run Step 4 after ensuring context.yaml is up to date.