Build applications with the @k2b/nessi TypeScript library. Use this skill whenever the user wants to create or modify a CLI, backend endpoint, service, prototype, provider switcher, streaming UI adapter, tool-calling workflow, structured-output task, agent loop, or AI integration using @k2b/nessi. Trigger for questions about root nessi(), nessi.structured(), @k2b/nessi/ai complete(), stream(), provider setup, responseFormat, OpenAI/OpenRouter/vLLM/Ollama/Anthropic/Mistral/Gemini, message formats, multimodal input, canonical block streaming events, issue events for malformed tool streams, dynamic per-turn tool resolution, tool call IDs, loopId correlation, loop_end.aggregate metadata, loop-level stats, local or durable steering, historical tool results, context growth, tool execution events, usage accounting, generation options, provider timeouts, API keys, local models, context-overflow handling, or when choosing whether the provider-only /ai layer is enough versus the root APIs.
Developer utilities: Base64, JWT decode, hashing, UUID, passwords, timestamps, regex test, URL encode. Use instead of opening external websites for dev tools.
