Fix live 404: glm-4.5-air retired; refresh model pool + rotate on 404

Speed up free-tier runs (~10min -> ~2min)

Week 6: Streamlit UI + deploy-ready packaging

Week 5: PPTX slide deck + MCP tool server/client

Week 4: LangGraph orchestration (Planner..Writer state machine)

Week 3: Chroma memory + Critic agent + iterative loop

Week 2: Reader agent + structured Claim extraction

Week 1: fix stale models, add retry + citation provenance check

Scaffold repo + Week 1 single-agent baseline