[rmkr-dev]

Adds a Skillbook entry and a Promptbook entry for streaming (SSE) responses in LLM gateways and Spring Boot services.

Skill: llm-streaming-response-guardrails

• Event contract with a finish or error frame plus [DONE] on every exit path
• Auth, budget, and target selection before the first byte; no retry or fallback after content is sent
• Upstream cancellation on client disconnect, including during the time-to-first-token wait
• Time-to-first-token, inter-chunk idle, and total deadlines with SSE heartbeats
• ingress-nginx buffering/timeouts and compression on streaming paths only; bounded buffers
• Pass-through, windowed, or buffered output checks; tool-call fragment assembly
• Final or estimated usage, stream metrics, shutdown drain, and fake-upstream tests

Prompt: harden-llm-streaming-responses

• Inventory, relay diff, deadlines, edge settings, usage, and a test list, with placeholders for stack, providers, edge, and output checks

Copilot, Claude Code, and Codex placement notes are included. Catalogs now 57/57; node scripts/site-check.mjs passes locally.