Add polymorphic activity timelines with live Turbo Stream updates to any Rails model. Covers migration, model, concern, shared partials, broadcasting, and optional AI-generated change summaries.
Add Tiptap rich text editing with debounced autosave to Rails models using Stimulus. Stores markdown in text columns (not ActionText). Covers installation, Stimulus controller, shared partials, Turbo cache handling, and optional change tracking.
Implement MCP server authentication with OAuth Dynamic Client Registration (RFC 7591), Authorization Server Metadata Discovery (RFC 8414), and generalized per-agent credential support. This skill should be used when building admin UIs that let users connect to third-party MCP servers, whether they use OAuth (Linear, Sentry, Granola), bearer tokens (Render, custom APIs), or API keys. Covers the full flow: metadata discovery, client registration, PKCE authorization, token exchange, token refresh, tool sync, and credential storage patterns (shared vs per-agent for any auth type). Includes hard-won lessons from production implementation.
Apply Better Stimulus best practices for writing maintainable, reusable StimulusJS controllers following SOLID principles