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oh, I really dislike that. I don't want AI companies encroaching more in my development workflow. Used to really enjoy Bun, but don't want support Anthropic at all. Will switch back to another runtime.
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you left out the best part...what happened to Kenton? He looked at lightweight serverless architecture..and then what?
I built Cloudflare Workers?
Agentic systems are no longer just model-driven — they are increasingly runtime-driven through tools, sandboxes, and orchestration layers. When agents are writing code, executing tests, calling external tools, and validating outcomes, the reliability of the entire system becomes a function of the runtime and environment, not just the model.
Controlling the runtime gives Anthropic vertical control across:
- Packaging and distribution - Execution semantics - Performance characteristics - Security surface area - Operational stability
Of course, owning a JavaScript runtime does not magically make runtime deterministic. The dominant sources of variability still sit lower in the stack: OS behaviour, native dependencies, filesystem semantics, scheduling, hardware differences, and network effects. Runtime ownership is necessary, but not sufficient, for true runtime determinism.
What this does signal is a strategic shift in where value is being captured.
Model capability is no longer the only critical layer.
The execution plane is becoming just as strategic too, can see this in ChatGPT 5’s dynamic model routing capability as well as ecosystem wide Tool Calling and MCP adoption, which are all aimed at increasing LLM determinism through traditional software stacks.
Vertical integration here looks far less like a tooling move and far more like a control-plane strategy: consolidate the stack, reduce dependency entropy, and shrink the surface area where behaviour can diverge.
Intelligence may live in the model, but reliability, scalability, and trust are increasingly properties of the system that executes it.
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This is FUD. Java has many open source implementations and nobody needs to deal with Oracle.
Even if we postulate that he fear is unwarranted and irrational, the fear is still real, based on Oracles history of lawsuits, and so the explanation still holds.
RIP Bun. I guess a bet on deno was the right bet.
It would be ironic if deno ended up having more builtin AI bloat despite Bun being the one owned by an AI company. But I wouldn't be surprised.
Owning your runtime is not about developer experience at the scale of Claude Code, it’s about your execution-surface area and the control you have over it. Agentic systems are no longer just model-driven — they are increasingly runtime-driven through tools, sandboxes, and orchestration layers. When agents are writing code, executing tests, calling external tools, and validating outcomes, the reliability of the entire…
Owning your runtime is not about developer experience at the scale of Claude Code, it’s about your execution-surface area and the control you have over it. Agentic systems are no longer just model-driven — they are increasingly runtime-driven through tools, sandboxes, and orchestration layers. When agents are writing code, executing tests, calling external tools, and validating outcomes, the reliability of the entire…
So you're saying Anthropic is making it's own AI-based AWS, like OpenAI is trying to do AI social media?
Earlier quoted context omitted.
This is FUD. Java has many open source implementations and nobody needs to deal with Oracle.
Even if we postulate that he fear is unwarranted and irrational, the fear is still real, based on Oracles history of lawsuits, and so the explanation still holds.
It has similar bases on facts.
A lot of people seem confused about this acquisition because they think of Bun as a node.js compatible bundler / runtime and just compare it to Deno / npm. But I think its a really smart move if you think of where Bun has been pushing into lately which is a kind of cloud-native self contained runtime (S3 API, SQL, streaming, etc). For an agent like Claude Code this trajectory is really interesting as you are creating…
I'm not confused about the acquisition but about the investment. What were the investors thinking? This is an open source development tool with (to date), 0$ of revenue and not even the beginnings of a plan for getting such a thing. The acquisition makes more sense. A few observations: - no acquisition amount was announced. That indicates some kind of share swap where the investors change shares for one company into…
I am more shocked about the origin story compared to the acquisition. > Almost five years ago, I was building a Minecraft-y voxel game in the browser. The codebase got kind of large, and the iteration cycle time took 45 seconds to test if changes worked. Most of that time was spent waiting for the Next.js dev server to hot reload. Why in the hell would anyone be using Next.js to make a 3D game... Jarred has always se…