Altman favored open-source harnesses; TrueFoundry shipped it a month later
kimmonismus · x · 2026-08-20
Closing the TrueForge thread: on July 14 Sam Altman posted "a reason to favor open-source harnesses," and TrueFoundry's CEO replied "building actively in this direction." A month later that direction is a repo, an MIT license, and a rerunnable benchmark — a platform company opening its runtime instead of keeping it as a moat. Sandboxes are provisioned on demand only when an agent needs code execution, letting one server run many agents concurrently while other turns stay fast and cheap. An enterprise tier via their AI Gateway adds RBAC, budgets, and PII guardrails. Open-source beta is live; GA in a few weeks.
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