Cloudflare Workers Tech Talks in Osaka #3

Aug 9, 2026 #Workers Tech Talks

Cloudflare Workers Tech Talks in Osaka #3

We held “Workers Tech Talks in Osaka #3” on August 7, 2026. It was the third Workers Tech Talks in Osaka, about a year and a half after the second one. About 40 people joined, and we had six great talks. And unlike the last event in Kyoto, where I was absent because of a fever, I kept my promise this time: I was there!

What is Cloudflare Workers Tech Talks?

Cloudflare Workers Tech Talks is an event where developers who are developing using Cloudflare Workers talk about Cloudflare Workers. It has been held multiple times in Tokyo, Osaka, Kyoto, Niigata, Hokkaido, and Fukuoka, and once in Austin, Texas. The feature of this event is that the speakers are free to talk about whatever they want. I often tell the speakers, “Please don’t give introductions like ‘What is Cloudflare Workers?’“. I ask them to talk about whatever they want to talk about.

Venue

The venue was gusuku Ashibinaa OSAKA, a community space in Umeda run by R3 Institute. Thank you for hosting us!

Venue

Attendees

We gathered participants through the event page on connpass.

https://workers-tech.connpass.com/event/399304/

We had 45 registrations for 50 seats, and about 40 people joined on the event day. The Osaka community — with some attendees coming from Nara and Kobe — showed up!

Talks

Six speakers, including me, gave talks.

Cloudflare is Agents

chimame

chimame talked about building an AI agent that plays a game together with you, using the Agents SDK. The frontend, built with Tauri and React, streams your microphone audio and the game screen over WebSocket; a Voice Agent on Workers receives them and talks back in real time. Since Agents are backed by Durable Objects, the agent keeps its state, and the conversation history can be stored in D1. The phrase “An agent must sleep” stuck with me — it sounded cool. The demo’s audio didn’t come out as he wanted, which he said he regretted, but the audience loved how the agent understood the gameplay and chatted about it.

The slides: https://speakerdeck.com/chimame/cloudflare-is-agents

What I Learned About “Not Owning Servers” by Moving from AWS to Cloudflare

rdlabo

rdlabo shared his experience migrating a production service from AWS to Cloudflare Workers. The migration cut costs by 30–50%, but he also talked honestly about the lessons of usage-based pricing — like an unexpected bill from caching everything in KV, which made him rethink what is actually worth caching. What resonated with me most: with Cloudflare, you don’t have to reserve computing resources for success before you succeed.

The slides: https://docs.google.com/presentation/d/1MVF6nWVXKlFVjLMnUoCtjkQ8pJBh4knmBcv5kFJn_eY/edit?usp=sharing

Minimal Schema-Driven Development with Formisch, HonoX, and Cloudflare Workers

Kanon

Kanon introduced a super minimal schema-driven development style combining HonoX, Valibot, and Formisch, a form library by the Valibot author. He wrote a new Formisch adapter for HonoX so that both the client side and the server side can share one Valibot schema. He recently became a maintainer of Valibot — it’s great to see the community members maintaining libraries used worldwide.

The slides: https://slide.inorinrinrin.com/entry/2026/08/04/235853

Building Demo Sites That Actually Run

I talked about cf-demos.yusuke.run, a site where you can run minimal code for various Cloudflare products right on the web page. It uses Dynamic Workers to execute code given as strings, with custom bindings to isolate the environment.

The slides: https://slides.yusu.ke/cf-demos

Cloudflare Browser Run

okady

okady talked about generating invoice PDFs for kintone with a headless browser. After struggling with chromedp — especially the recurring browser-version-mismatch failures — he moved to Cloudflare’s Browser Run. It renders HTML/CSS to PDF, and it’s really cheap. He uses other Cloudflare products as well, so I’d love to hear those stories at a future event.

The slides: https://www.slideshare.net/slideshow/cloudflare-browser-run/289077401

Still, MCP After All

Hidetaka Okamoto

Hidetaka Okamoto wrapped up the talks with his experience developing and operating multiple remote MCP servers on Workers. It was interesting that he built MCP servers for things like managing WordPress articles and querying Google Search Console. He also covered how he keeps up with the evolving MCP specification, and how he uses Workers Analytics Engine to measure which MCP tools are actually used and how effective they are.

The slides: https://www.docswell.com/s/hideokamoto/ZR8W22-2026-08-07-193326

Feedback

I asked the attendees to post on X with the hashtag #workers_tech. You can see their feedback here:

https://x.com/search?q=%23workers_tech

leaysgur also wrote notes about the event.

Summary

Osaka is where the first Workers Tech Talks outside of Tokyo happened, and the community here keeps getting better. The talks covered AI agents, cloud migration, schema-driven development, dynamic code execution, browser automation, and MCP — all deeply technical. Thank you to all the speakers and attendees, and to R3 Institute for the wonderful venue!

Here’s the group photo!

Group photo