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data goes stale, APIs get deprecated, and best practices evolve, so framework code written from memory often contains outdated or incorrect patterns.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 framework-specific implementation decision in official documentation, so the code you receive is verifiable against authoritative sources. ## Core Features & Use Cases - Stack Detection: Reads dependency files like package.json, composer.json, requirements.txt, go.mod, Cargo.toml, or Gemfile to identify exact framework and library versions before writing any code. - Documentation-Grounded Implementation: Fetches the specific official documentation page for the feature being implemented, follows documented API signatures, avoids deprecated patterns, and surfaces conflicts between docs and existing code. - Source Citation: Adds full-URL citations in code comments and conversation for every framework-specific decision, and explicitly flags anything that could not be verified. - Use Case: You are building a form in a React 19 project. Instead of a stale useState-based submission handler, the Skill detects React 19.1.0 from package.json, fetches the official useActionState reference, implements the documented pattern, and cites react.dev so you can verify the approach. ## Quick Start Ask the assistant to implement a framework-specific feature using source-driven development so every pattern is verified against the official docs and cited.