- Agent-spec: remove invalid CLI `-f agent-spec` option, link to manual setup
- A2A: fix env var (GEMINI_API_KEY) and port (10002) to match starter template
- AWS Strands: fix useRenderTool to use Zod schema and correct render props
- LangGraph: add auth guide cross-reference in configurable docs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>