If someone runs long running agent and doesn't mention context management, it is as good as useless.

For coding compaction kind of works as the agent could regenerate lot of the missing context(but far from all), but for places where there is need for long term context, solving it is one of the most important challenge.

Author here. Took out some of the technical details about the harness, but it was mostly just OpenCode's default compaction.

The harness was extremely simple: A handful of MCPs + Skill.MDs and OpenCode with a stayalive daemon inserting "continue" every time it went idle