> ## Content Index
> Fetch the complete content index at: https://www.antoinebuteau.com/llms.txt
> Use this file to discover other available public pages before exploring further.

# Harness Engineering — Series Index
- URL: https://www.antoinebuteau.com/harness-engineering-series-index/
- Published: 2026-05-11T04:20:34.000Z
- Updated: 2026-07-19T00:12:48.000Z
- Description: Agent systems succeed or fail through the harness around the model: context, tools, state, orchestration, human oversight, permissions, observability, and middleware. The sequence builds from first principles to a practical audit of the full operating system.
- Author: Antoine Buteau
- Tags: #Harness Engineering, Series Index

**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](https://www.antoinebuteau.com/harness-engineering-series-1-why-harnesses-matter/)
2. [Context Engineering Is the Real Interface](https://www.antoinebuteau.com/harness-engineering-series-2-context-engineering-is-the-real-interface/)
3. [Tool Design for Agent Work](https://www.antoinebuteau.com/harness-engineering-series-3-tool-design-for-agent-work/)
4. [State, Memory, and Checkpoints](https://www.antoinebuteau.com/harness-engineering-series-4-state-memory-and-checkpoints/)
5. [Orchestration Beyond Chat](https://www.antoinebuteau.com/harness-engineering-series-5-orchestration-beyond-chat/)
6. [Human-in-the-Loop as Runtime Design](https://www.antoinebuteau.com/harness-engineering-series-6-human-in-the-loop-as-runtime-design/)
7. [Sandboxes, Permissions, and Failure Boundaries](https://www.antoinebuteau.com/harness-engineering-series-7-sandboxes-permissions-and-failure-boundaries/)
8. [Observability for Agent Runs](https://www.antoinebuteau.com/harness-engineering-series-8-observability-for-agent-runs/)
9. [Harness Moats and Middleware](https://www.antoinebuteau.com/harness-engineering-series-9-harness-moats-and-middleware/)
10. [The Harness Engineering Audit](https://www.antoinebuteau.com/harness-engineering-series-10-the-harness-engineering-audit/)

Start with [Why Harnesses Matter](https://www.antoinebuteau.com/harness-engineering-series-1-why-harnesses-matter/). If you want the practical diagnostic, jump to [The Harness Engineering Audit](https://www.antoinebuteau.com/harness-engineering-series-10-the-harness-engineering-audit/).