Anthropic Agent Evolution

2026-09-12 Anthropic Agent Evolution I: From Workflows to Agents—and Why Harnesses Matter
2026-09-12 Anthropic Agent Evolution II: Context Reset and Structured Handoff
2026-09-12 Anthropic Agent Evolution III: The Planner–Generator–Evaluator Quality Loop
2026-09-12 Anthropic Agent Evolution IV: Managed Agent Runtime—Session, Harness, and Sandbox