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MCP Skill: Context7 (Docs Lookup)

mcp-context7

Use the Context7 MCP server (@upstash/context7-mcp) to fetch authoritative, version-appropriate library documentation snippets (Angular, NgRx Signals, Firebase, RxJS, Playwright); use when you must confirm API usage, signatures, or best practices without relying on memory.

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SKILL.md

Full skill instructions

MCP Skill: Context7 (Docs Lookup)

Scope

Use the MCP server configured as context7 in .vscode/​mcp.json to retrieve documentation context for libraries used in this repo.

Preconditions

  • Ensure .vscode/​mcp.json contains the context7 server.
  • Ensure the CONTEXT7_API_KEY input is available (the VS Code MCP input prompt will request it).

Operating Rules

  • Use Context7 for API correctness when there is a meaningful chance memory is wrong (new Angular versions, new NgRx Signals APIs, Firebase SDK changes).
  • Prefer primary documentation references; do not quote large blocks.

Typical Uses In This Repo

  • Angular 20 control flow and signals interop APIs.
  • NgRx Signals (signalStore, withState, withMethods, rxMethod, tapResponse).
  • AngularFire / Firebase modular APIs.
  • Playwright test APIs.

Prompt Templates

  • "Look up the correct API/​signature for <symbol> in <library> (target versions: Angular ~20, @ngrx/​signals ~20). Provide minimal usage example."
  • "Confirm best practice for converting Observable to Signal in Angular 20, including cleanup semantics."

Output Requirements

  • Provide the minimal snippet needed to implement correctly.
  • Call out version assumptions explicitly (match package.json versions).