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Guide to the assistant-ui runtime system, single-thread state, and the imperative aui client API in @assistant-ui/react. Use when creating a runtime (useLocalRuntime with a ChatModelAdapter, useExternalStoreRuntime for Redux/Zustand, useRemoteThreadListRuntime, useAssistantTransportRuntime), wiring AssistantRuntimeProvider, or reading/mutating thread, message, composer, and attachment state. Covers the unified hooks useAui, useAuiState, useAuiEvent and the v0.15 property accessors (aui.thread, aui.threads, aui.message, aui.composer, aui.part; availability via aui.thread.source != null), the s.optional.<scope> state view, scope methods (append, cancelRun, startRun, resumeRun, message({index}), part({index}), composer().send), capabilities, adapters (attachment, speech, dictation, suggestion, feedback, history), realtime voice, and types (ThreadMessage, MessageState, MessagePart, MessageStatus, ChatModelRunResult). The v0.12-era legacy context hooks (useAssistantRuntime, useThreadRuntime

Check code against the documentation that specifies it - which requirements hold, which the code contradicts, which are absent, and what the code does that no document mentions. Use when comparing an implementation against a whitepaper, protocol spec, or design document.

Creates custom Semgrep rules for detecting security vulnerabilities, bug patterns, and code patterns. Use when writing Semgrep rules or building custom static analysis detections.

Use Copilot Spaces to provide project-specific context to conversations. Use this skill when users mention a "Copilot space", want to load context from a shared knowledge base, discover available spaces, or ask questions grounded in curated project documentation, code, and instructions.

Prepares codebases for security review using Trail of Bits' checklist. Helps set review goals, runs static analysis tools, increases test coverage, removes dead code, ensures accessibility, and generates documentation (flowcharts, user stories, inline comments).

Guidance on writing fast, robust, modern Svelte code. Load this skill whenever in a Svelte project and asked to write/edit or analyze a Svelte component or module. Covers reactivity, event handling, styling, integration with libraries and more.