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YesTool not named · 21 Aug 2026

We ended up building our own test platform to reduce the human bottleneck in the verification loop

fabianlindfors on Hacker News

In the thread “Building an (almost) fully self-hosted, sandboxed, agentic software factory”, replying to this comment

Helped: Custom hermetic test environment with UI for reviewing recorded interactions.

Got in the way: Reviewing standard integration and unit tests written by agents was too hard.

Agreed, we had agents writing standard integration/unit/e2e tests but turned out to be a ton of work reviewing just that and hard to wrap one’s head around as a developer. We ended up building our own test platform to reduce the human bottleneck in the verification loop. Takes the form of a hermetic test environment that run all our code and infra in a way that matches production. …