pattern-finder skill

Overview

This skill finds implementation examples and design patterns across a codebase to help you implement features consistently. It locates best-match files, returns exact line ranges, and provides a concise implementation guide tied to project conventions. Use it to follow existing patterns and avoid guesswork when adding features.

How this skill works

Tell the skill the pattern or feature you need (for example, "api endpoint" or "authentication"). The skill queries the code index for matching examples, ranks the best files by relevance, and returns precise file locations with line numbers. It also summarizes the standard implementation flow, key conventions, and common pitfalls to avoid.

When to use it

• You ask "how do I implement X" or "how does this project do X"
• You need concrete examples to follow project conventions
• You want exact file locations and line numbers for reference
• You are adding a feature and want to mirror existing patterns
• You need test examples or validation patterns to copy

Best practices

• Start from the highest-ranked example and follow its directory structure and naming conventions
• Copy the standard flow (request handling, validation, business logic, persistence, error handling) in order
• Reuse existing helper modules, middleware, and constants rather than creating duplicates
• Preserve logging and error patterns so behavior stays consistent across the project
• Add tests modeled on the project's testing examples and follow the same fixtures/mocks

Example use cases

• Locate and copy an API endpoint implementation with handler, router, and tests
• Find all authentication-related files and the recommended flow for token issuance
• Discover database query patterns and helper utilities to reuse in a new service
• See how background jobs are queued and processed to add a new scheduled task
• Identify error handling and validation patterns to match responses and status codes

FAQ