Sam Witteveen · 2026-09-14 · notable
Sam Witteveen — 'The OpenSource Managed Agents'
Sam Witteveen walks through TrueForge, TrueFoundry's open-source agent harness, in a video posted on 14 September 2026. The episode covers the architecture, the benchmarks, and a live install with model, connector and sandbox choices.
Sam Witteveen's follow-up to his managed-agents episode: the open-source harness you run yourself, installed on camera.
What is it?
'The OpenSource Managed Agents' went up on Sam Witteveen's channel on 14 September 2026 and reviews TrueForge, the agent harness TrueFoundry publishes under an MIT licence at github.com/truefoundry/trueforge. A harness is the runtime layer around a model — it runs the agent loop, executes tools, keeps context and persists a session. Witteveen's angle is that TrueForge does that job without the forced model choice that a hosted managed-agent product brings.
How does it work?
The episode is part explanation and part live install. It opens on what an agent harness is at 1:42, moves to the TrueForge runtime at 3:43 and the architecture at 4:47, then spends 5:29 on benchmarks. From 10:24 it becomes a demo: installing TrueForge, picking a model, wiring connectors, adding skills, choosing a sandbox provider, and finally driving the whole thing from Python at 17:33.
Why does it matter?
Agent harnesses are where the model choice gets locked in, because a hosted one usually ships with the vendor's own model behind it. Watching someone install a self-hosted harness and swap the model in the UI shows what that choice actually costs in setup time. Witteveen's previous episode asked what managed agents lock you into; this one is the answer he found.
Who is it for?
engineers building agents who want to run their own harness
Try it
npx @truefoundry/trueforge