if you don't own your harness, you don't own your memory this is so true. even though Codex is an open source, it generates an encrypted com…

if you don't own your harness, you don't own your memory this is so true. even though Codex is an open source, it generates an encrypted compaction summary (that is not usable outside of the OpenAI ecosystem). another example is, closed harness (like Claude Agent SDK, which uses Claude Code under the hood, which is not open source), this harness interacts with memory in a way that is unknown to us. memory is important, and it creates lock in

With closed agent platforms like Claude Managed Agents, your agent's memory belongs to them, not you. It's locked behind their API. Agent in…
Most people building AI agents don't realize this until it's too late. Your agent's memory isn't a feature. It's your moat. 1. Closed harnes…
time to help builders own their intelligence, open everything 🤝 the data produced and Experiential Memory gained from every agent interacti…
Harness, Memory, Context Fragments, & the Bitter Lesson this is a work in progress mental dump on interesting intersections between how we u…
the real future of the very best vertical products is Model/Harness Choice + Openness easy to deploy infra is nice (great release from Ant) …

Source: Harrison Chase (X) | 2026-04-12

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