Relentlessly proactive agents need relentlessly isolated stacks. Here's how Forge does it.
Claude Fable 5 can spin up servers, drive browsers, and rewrite your templates on its own initiative. Simon Willison calls running that unsandboxed 'a top contender for a Challenger disaster.' Forge shipped the answer the same week — isolated stacks with per-run JWT roots, auto-swept orphans, and tenant-level worker isolation. Here's what landed and why.