Rewriting Bun in Rust
Jarred Sumner, Creator of Bun, walks through why and how his team rewrote Bun to Rust, using dynamic workflows in Claude Code.
Details
City
Tokyo, JP
Date
11 June 2026
Time
15:30 – 16:00
Speaker(s)
Jarred Sumner
Anthropic
Language
English
Agenda
Demos and office hours run all day. Drop by for a demo between sessions. Sign up in advance for office hours. All times in Japan Standard Time (JST).
A note on language. Sessions run primarily in English with some in Japanese (marked on the agenda), and live simultaneous interpretation is available in both directions throughout the event. Office hours are held in English.
08:00 – 09:00
Check-in and breakfast
09:30 – 09:45
morning sessions
10:00 – 10:30
10:00 – 10:45
10:45 – 11:15
From Claude prototype to production: How Myrealtrip builds and ships AI workflows
·
(
Founder stage
)
Founder stage
·
Wonjin Hur
Aini: Enabling zero-language barrier chat with my girlfriend
·
(
Builder stage
)
Builder stage
·
Siyuan Yan (Matt)
11:00 – 11:45
11:30 – 12:00
The 1% problem: How domain expertise + Claude let a 2-person team hit #1 on a global classification benchmark
·
(
Founder stage
)
Founder stage
·
Gahee Seo
あなたの日常にClaudeを取り入れる方法 (How to integrate Claude into your daily life)
·
(
Builder stage
// presented in Japanese
)
Builder stage
·
Yuta Hayashi
12:00 – 12:45
11:45 – 13:30
Lunch
afternoon sessions
13:00 – 13:45
13:15 – 13:45
The model is ready. The harness is ready. The spec isn't.
·
(
Founder stage
// presented in Japanese
)
Founder stage
·
Hitoshi Tsuyuki
Sumiki Hori
Same model, three different worlds: Japan, India, Australia
·
(
Builder stage
)
Builder stage
·
Jason Bigman
Rye Smith
Sumeet Doshi
Yuta Hayashi
14:00 – 14:30
Code less, query more with sub-agents and data
·
(
Founder stage
// presented in Japanese
)
Founder stage
·
Kenta Yamamoto
How I built a legal platform for 280 million people at the Claude Code Hackathon
·
(
Builder stage
)
Builder stage
·
Ilham Firdausi Putra
14:00 – 14:45
Tool, skill, or subagent? Decomposing an agent that outgrew its prompt
·
(
Workshop
)
Workshop
·
Karan Sampath
14:45 – 15:15
Manager 11: How I finally shipped my dream football management game with Claude
·
(
Founder stage
)
Founder stage
·
Rye Smith
Blood, code & Claude: How I shipped a life-saving app solo
·
(
Builder stage
)
Builder stage
·
Sumeet Doshi
15:00 – 15:45
15:30 – 16:00
Evening
15:45 – 18:00
Closing reception
Anthropic's developer conference
Join us for a day of hands-on workshops, live demos of new capabilities and conversations with the teams behind Claude. Watch live from anywhere.