Sunil Pai
Also known as threepointone
Principal systems engineer at Cloudflare working on AI agents; founder of PartyKit.
- Sunil Pai is a systems engineer and developer-tools builder based in London.
- He founded PartyKit, which Cloudflare acquired in 2024.
- Earlier he worked on the React core team and built social VR at Oculus.
- At Cloudflare he works on agents and long-running AI systems.
Why it matters
- For developers building AI agents or real-time apps on Cloudflare: he is the top contributor to the Agents SDK and writes its launch posts.
- Current role
- Principal systems engineer, Cloudflare (agents and long-running AI systems)1
- Based in
- London1
- Founded
- PartyKit, acquired by Cloudflare in April 20242
- Earlier
- React core team; led developer tooling for Cloudflare Workers; social VR at Oculus1
- Agents SDK
- Top contributor to cloudflare/agents (976 commits as of 3 Oct 2026)3
Writing to start with
The shading behind a date shows how recent it is: full within 3 months, empty after 2 years.
-
4 years ago
wrangler 2.0 — a new developer experience for Cloudflare Workers (opens blog.cloudflare.com)
Second-generation Workers tooling that can run Workers on a local machine. With Ashcon Partovi.
-
2 years ago
PartyKit joins Cloudflare; it began in 2022 to make Durable Objects easier to use. With Rita Kozlov.
-
19 months ago
Making Cloudflare the best platform for building AI Agents (opens blog.cloudflare.com)
Introduces agents-sdk, a JavaScript framework for building AI agents.
-
15 months ago
Connect any React application to an MCP server in three lines of code (opens blog.cloudflare.com)
Open-sources use-mcp, a React library for connecting to MCP servers, and the AI Playground.
-
1 year ago
Code Mode: the better way to use MCP (opens blog.cloudflare.com)
Turns MCP tools into a TypeScript API and has the model write code against it. With Kenton Varda.
-
6 months ago
Sandboxing AI agents, 100x faster (opens blog.cloudflare.com)
Dynamic Workers: AI-generated code in isolates that start in milliseconds. With Kenton Varda and Ketan Gupta.
-
5 months ago
Project Think: building the next generation of AI agents on Cloudflare (opens blog.cloudflare.com)
The next Agents SDK: durable execution, sub-agents, sandboxed code and persistent sessions. With Kate Reznykova.
Connections
Links
Sources
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