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The World's Biggest Dev Event Hits Silicon Valley
WeAreDevelopers World Congress comes to San José, CA — September 23–25, 2026. 10,000+ developers, 500+ speakers, and the full software development lifecycle under one roof, in the heart of Silicon Valley.
Kelsey Hightower. Thomas Dohmke (fmr. CEO, GitHub). Christine Yen (CEO, Honeycomb). Mathias Biilmann (CEO, Netlify). Olivier Pomel (CEO, Datadog). The people actually building the tools you use every day — all on one stage.
AI, cloud, DevOps, security, architecture, and everything real builders ship with. Workshops, masterclasses, and the official congress party.
What's up, everyone? This week, TanStack reinvented how React Server Components work, Cloudflare launched an entire agent infrastructure platform, OpenAI publicly trashed Anthropic in an internal memo, and Cursor added visual canvases to its coding agents. Let's dive in.
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TanStack Start just added experimental RSC support that works completely differently from Next.js. Instead of the server owning the component tree, RSCs are fetchable, cacheable data streams you manage with TanStack Query. A new "Composite Components" pattern lets server-rendered UI expose slots for client components to fill. This inverts the server-first model entirely. On TanStack.com, content pages dropped ~153 KB gzipped and Total Blocking Time fell from 1,200ms to 260ms. This is the most interesting RSC take since the original App Router launch.
This happened 4 days after I released this video. You’re welcome.
Cloudflare launched Project Think during Agents Week. It’s a full platform for building durable, serverless AI agents. Agents get persistent SQLite, crash recovery via fibers, sub-agents with isolated storage, sandboxed code execution in Dynamic Workers, and the ability to write their own TypeScript tools at runtime. Zero compute cost when hibernated. This is Cloudflare betting that agents-as-infrastructure is the next serverless.
OpenAI's CRO sent an internal memo admitting the Microsoft partnership has "limited our ability" to reach enterprise customers, framing the $50B Amazon deal as the fix. She also called Anthropic's strategy "built on fear and restriction" and alleged their revenue run rate is inflated by ~$8B.
Cursor 3.1 added canvases. These are interactive React-based visualizations agents create inline for dashboards, PR reviews, and eval analysis. Also released: tiled multi-agent layout, improved voice input, and 87% fewer dropped frames during large edits.
TanStack AI launched Code Mode, letting LLMs write and execute TypeScript programs in a sandbox instead of calling tools one at a time, which helps solve the N+1 problem with correct math via JavaScript, not token prediction.
Payload CMS v3.83.0 introduces a definePlugin composition API with cross-plugin discovery, UUIDv7 support for Postgres/SQLite, Lexical view overrides, custom collection views, and a --agent flag for create-payload-app that installs coding agent skills. Also patches a drizzle-orm SQL injection vulnerability.
Also this week:
Next.js v16.2.4 stable with Turbopack and Safari cache-buster fixes; canaries 32–45 enabled partial fallbacks by default and added
import.meta.globfor Vite compatibility.Claude Code 2.1.91–2.1.110 added session recaps, 1-hour prompt cache TTL,
/tuiflicker-free rendering, mobile push notifications, and patched multiple Bash permission bypasses.
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I started to build my own CRM using Payload and other tools. Check out the initialization process here!
What did I miss? There’s so much happening in modern web dev that I know I missed something. Please share your thoughts in the comments or reply to this email. I want to address your suggestions and may include them in future newsletters.
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