elmethis

Build and style Elmethis interfaces using its current published design system. Use for design AI agents creating or reviewing Elmethis CSS, components, pages, themes, prototypes, or visual states.

Build, debug, refactor, review, and test applications across the Solid ecosystem. Use this skill whenever a task involves SolidJS, SolidStart, @solidjs/router, @solidjs/meta, signals, stores, fine-grained reactivity, Solid file routes, server functions, actions, metadata, SSR, or hydration, even when the user only says "Solid app" or asks to migrate React-style TSX. It prevents React mental-model mistakes and guides selection of current Solid APIs.

Expert guidance for the Model Context Protocol (MCP), the JSON-RPC 2.0 protocol connecting LLM apps to external tools and data. Covers spec versions 2024-11-05 through 2025-11-25 (architecture, transports, Resources, Prompts, Tools, Sampling, Roots, Elicitation, Tasks, lifecycle, OAuth 2.1, utilities) plus the official language SDKs: the Rust SDK `rmcp` 2.2 (guide — `ServerHandler`/`ClientHandler`, `#[tool_router]`/`#[tool_handler]`/`#[task_handler]` macros, `StreamableHttpService`, Cargo features, SEP-1686 tasks, `tokio::io::duplex` test harness) and the TypeScript SDK `@modelcontextprotocol/sdk` (incl. the `pkce-challenge` Vite/bundler resolver failure). Use when building MCP servers or clients in any language, working with transports or OAuth, or debugging SDK-specific issues. Always invoke for questions mentioning MCP, modelcontextprotocol, `rmcp`, tools/list, tools/call, sampling/createMessage, elicitation/create, Streamable HTTP, Mcp-Session-Id, `pkce-challenge`, or `@modelcontextprotocol/sdk`.

Expert guidance for implementing the A2UI (Agent to UI) protocol — covering surfaces, components, data binding, catalogs, message streams (v0.9 / v0.9.1: createSurface / updateComponents / updateDataModel / deleteSurface; v1.0 adds callFunction / functionResponse / actionResponse; v0.8: surfaceUpdate / dataModelUpdate / beginRendering), the A2A extension binding, custom component catalogs (schemas, renderers, negotiation, versioning, graceful degradation), client/renderer architecture (MessageProcessor / SurfaceModel / ComponentImplementation / Binder), custom functions, the sendDataModel flag, surfaceProperties, and v0.8 → v0.9 → v0.9.1 → v1.0 migration. Always invoke for any question that mentions A2UI, surfaceUpdate, beginRendering, createSurface, updateComponents, updateDataModel, sendDataModel, callFunction, functionResponse, actionResponse, surfaceProperties, a2uiClientCapabilities, supportedCatalogIds, catalogId, basic_catalog, formatString, ChildList, ComponentId, or agent-driven UI streaming.

Expert guidance for AG-UI (Agent–User Interaction Protocol) — the open, event-based protocol connecting AI agents to user-facing apps. Covers the run lifecycle, event types (lifecycle, text, tool-call, state, activity, reasoning), RunAgentInput, AbstractAgent/HttpAgent, multimodal messages, shared state via STATE_SNAPSHOT/STATE_DELTA (RFC 6902 JSON Patch), frontend-defined tools, interrupt-aware HITL with RunAgentInput.resume, encrypted reasoning for ZDR, capability discovery, middleware, serialization with parentRunId branching, the TypeScript (`@ag-ui/client`, `@ag-ui/core`) and Python (`ag-ui-protocol`) SDKs plus community SDKs. Use whenever someone builds or consumes AG-UI, wires up CopilotKit, LangGraph, CrewAI, Mastra, Pydantic AI, LlamaIndex, Agno, AG2, Microsoft Agent Framework, Google ADK, AWS Strands, or Bedrock AgentCore, or mentions AG-UI, ag_ui, RunStartedEvent, STATE_DELTA, TOOL_CALL_START, REASONING_*, AbstractAgent, HttpAgent, or EventEncoder. Always invoke.