Harness Engineering is a 10-part series. Use this page as the table of contents and read the posts in order.

Read the series in order

  1. Why Harnesses Matter
  2. Context Engineering Is the Real Interface
  3. Tool Design for Agent Work
  4. State, Memory, and Checkpoints
  5. Orchestration Beyond Chat
  6. Human-in-the-Loop as Runtime Design
  7. Sandboxes, Permissions, and Failure Boundaries
  8. Observability for Agent Runs
  9. Harness Moats and Middleware
  10. The Harness Engineering Audit

Start with Why Harnesses Matter. If you want the practical diagnostic, jump to The Harness Engineering Audit.