Comprehensive Linear GraphQL API skill with API key auth (no OAuth
needed). Includes all common queries (issues, projects, teams, search,
filters) and mutations (create, update, assign, comment, status changes).
Addresses user pain point: Linear MCP server OAuth flow is unreliable
in headless agent sessions. This skill uses personal API keys which
work reliably without browser-based auth flows.
Requires: LINEAR_API_KEY env var (personal API key from Linear settings)