What problem does it solve? Training data goes stale, APIs get deprecated, and best practices evolve, so framework code written from memory often contains outdated or incorrect patterns. This Skill grounds every implementation decision in official documentation, giving you code you can verify because every pattern traces back to an authoritative source. ## Core Features & Use Cases - Stack and Version Detection: Reads dependency files like package.json, composer.json, requirements.txt, go.mod, Cargo.toml, or Gemfile to identify exact framework versions before writing any code. - Official Documentation Retrieval: Fetches the specific documentation page for the feature being implemented, following a strict source hierarchy that prioritizes official docs, changelogs, and web standards over Stack Overflow or blog posts. - Source-Cited Implementation: Writes code matching documented API signatures, surfaces conflicts between docs and existing project code, and attaches full-URL citations to every framework-specific decision. - Use Case: You are building a form in a React 19 project. Instead of writing a manual useState-based submission handler from memory, the Skill detects React 19.1.0 from package.json, fetches the official useActionState reference, implements the modern pattern, and cites react.dev so you can verify the approach. ## Quick Start Verify my React form implementation against the official React 19 documentation and cite your sources for each pattern you use.