Joined September 2019
- Tweets 253
- Following 2
- Followers 3,976
- Likes 212
104 Photos and videos
Pinned Tweet
Mar 31
Say hello to agentOS (beta)
A portable open-source OS built just for agents. Powered by WASM & V8 isolates.
π Embedded in your backend
β‘ ~6ms coldstarts, 32x cheaper than sbxs
π Mount anything as a file system (S3, SQLite, β¦)
π₯§ Use Pi, Claude Code/Codex/Amp/OpenCode soon
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Rivet retweeted
Memory of coding harnesses in agentOS (portable WASM OS for agents):
π₯ Codex (WASM): 122 MB
π₯ Pi (V8): 153 MB
π₯ Claude Code (V8): 316 MB
OpenCode & Amp coming soon
This is the memory for the *entire* VM, including bash, Node.js, Python, git fully loaded
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Mar 31
Say hello to agentOS (beta)
A portable open-source OS built just for agents. Powered by WASM & V8 isolates.
π Embedded in your backend
β‘ ~6ms coldstarts, 32x cheaper than sbxs
π Mount anything as a file system (S3, SQLite, β¦)
π₯§ Use Pi, Claude Code/Codex/Amp/OpenCode soon
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Rivet retweeted
Mar 23
π€ Rivet Secure Exec (V8 isolates):
Securely execute Node.js anywhere (Railway, Vercel, Hetzner, Kubernetes)
vs
π₯ Firecracker (microVMs):
Full Linux operating system, but requires specialized infrastructure
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Mar 23
Exciting launch powered by Rivet π©
Mar 23
Introducing Agent Computer
Cloud computers for AI agents in <0.5s with persistent disk, shared credentials, and SSH access
agentcomputer.ai
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Mar 21
Rivet Secure Exec v0.2.0 just got more secure
Process isolation now separates Node.js instances from the host
- Security β improved isolation against V8 0-days
- OOM protection β in case of over-provision
- Bun support β no longer tied to embedded V8
All written in Rust π¦
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Mar 20
Rivet Secure Exec 0.2.0 now has 2.8x faster coldstarts for Node.js execution without a sandbox
17.9 ms β 6.2ms (p99)
16.2ms β 4.0 ms (p50)
Instead of rebuilding the runtime every creation, V8 isolate snapshots let us clone a ready-to-go instance instantly β much like in KVM
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Mar 19
Powered by Secure Exec β‘οΈ
Just shipped something I'm really excited about in @ππππππ/ππΌπ-ππππ
πππ: Code Mode.
The idea: instead of the LLM calling your MCP tools one at a time (and resending ALL tool descriptions every single round-trip), it writes JavaScript that orchestrates everything in one go.
Loops, conditionals, Promise.all, real control flow, not 8 separate LLM turns.
With 50 tools the token savings are insane: -81% on tool description overhead alone.
And the best part? Your existing tools don't change at all. One line:
`experimental_codeMode: true`
Runs in a secure V8 sandbox thanks to @rivet_dev's secure-exec, perfect timing with their launch yesterday.
mcp-toolkit.nuxt.dev/advanceβ¦
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Mar 19
Hot damn that was fast
Code Mode powered by Secure Exec SDK
Let LLMs execute JavaScript to call MCP/tool calls
- 81% reduction in tool usage
- Drop in replacement
- Real control flow
Adding this to our Code Mode docs π€
Just shipped something I'm really excited about in @ππππππ/ππΌπ-ππππ
πππ: Code Mode.
The idea: instead of the LLM calling your MCP tools one at a time (and resending ALL tool descriptions every single round-trip), it writes JavaScript that orchestrates everything in one go.
Loops, conditionals, Promise.all, real control flow, not 8 separate LLM turns.
With 50 tools the token savings are insane: -81% on tool description overhead alone.
And the best part? Your existing tools don't change at all. One line:
`experimental_codeMode: true`
Runs in a secure V8 sandbox thanks to @rivet_dev's secure-exec, perfect timing with their launch yesterday.
mcp-toolkit.nuxt.dev/advanceβ¦
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Mar 19
Secure Exec SDK gives agents an insanely customizable virtual OS
File system β persist to S3, SQLite, Postgres, etc
Network (outbound) β granular network control
Network (inbound) β dev servers (Hono, Express, etc)
Child process β custom tools
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Mar 18
Introducing the Secure Exec SDK
Secure Node.js execution without a sandbox
β‘ 17.9 ms coldstart, 3.4 MB mem, 56x cheaper
π¦ Just a library β supports Node.js, Bun, & browsers
π Powered by the same tech as Cloudflare Workers
$ πππ πππππππ ππππππ-ππ‘ππ
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