Reference Searcher Agent Skill

Reference Searcher

Structured methodology for searching external references — official docs, open-source implementations, and web resources — to inform development decisions.

When to Use This Skill

• Working with unfamiliar libraries or frameworks
• Needing production-quality implementation examples
• Debugging unexpected behavior from external dependencies
• Finding best practices for specific patterns (auth, caching, etc.)
• Evaluating library choices with real-world usage data

What This Skill Does

Search Strategy: Three Layers

Layer 1: Official Documentation

Search official docs for the specific library using web search:

# Search official docs directly
# e.g., "next.js middleware authentication site:nextjs.org"
# Or use documentation MCP tools if available (e.g., Context7)

Best for: API signatures, configuration options, migration guides, official patterns.

Layer 2: Open-Source Implementation Examples (GitHub)

Search real codebases for production patterns:

# Search GitHub for code patterns via grep.app or GitHub search
# e.g., https://grep.app/search?q=getServerSession%28&filter[lang][0]=TypeScript
# Or use GitHub code search: gh search code "getServerSession(" --language=TypeScript

Best for: How established projects (1000+ stars) handle specific patterns, battle-tested error handling, real-world integration examples.

Search tips:

• Search for actual code patterns, not keywords
• Use (?s) prefix for multi-line regex patterns
• Filter by language and file path for precision
• Look for repos with 1000+ stars for production quality

Layer 3: Web Search (Current Information)

Search the web for recent articles, discussions, and guides:

# Web search for current information
# e.g., "OWASP JWT security best practices 2024"

Best for: Security advisories, recent breaking changes, community discussions, performance benchmarks, "why does X behave this way" questions.

Search Workflow

• Start with official docs — fastest, most authoritative
• If docs insufficient — search GitHub for real implementations
• If pattern unclear — web search for community knowledge
• Synthesize — combine findings into actionable guidance

Result Evaluation

For each source found, assess:

| Criterion | Check |

|-----------|-------|

| Recency | Is this from the current major version? |

| Authority | Official docs > popular repos > blog posts |

| Completeness | Does it cover error handling and edge cases? |

| Applicability | Does it match our tech stack and constraints? |

Output Format

## Research: [Topic]

### Official Documentation
- [Finding 1 with link]
- [Finding 2 with link]

### Production Examples
- [Repo/file]: [What pattern they use and why]
- [Repo/file]: [Alternative approach]

### Recommendation
Based on [sources], the recommended approach is [X] because [reasons].

### Caveats
- [Known limitation or gotcha]

Anti-Patterns

• Searching for keywords instead of actual code patterns on GitHub
• Trusting blog posts over official documentation
• Using examples from outdated library versions
• Skipping error handling patterns in reference code
• Over-researching — stop when you have enough to proceed confidently

Example

User: "How should I implement rate limiting in Express?"

Output:

• Official docs: express-rate-limit documentation — configuration options, store adapters
• GitHub: 3 production repos showing Redis-backed rate limiting with sliding window
• Web: OWASP rate limiting guidelines, comparison of token bucket vs sliding window
• Recommendation: Use express-rate-limit with Redis store, sliding window algorithm, with specific config example

Inspired by: oh-my-opencode Librarian agent