Durable Objects

Gadgets: Personal app vibe coding that is actually safe — Kenton Varda, Cloudflare

Aug 5, 2026 · 18:54

Kenton Varda, creator of Cloudflare Workers, argues personal AI codegen breaks traditional cloud infrastructure and needs a different platform: his side project Gadgets, an office suite of user-vibecoded apps on Workers. Feature requests die in Jira; the plugin-rewrite trap stalls; Gadgets answers with per-instance apps where the platform, not the app, handles sharing, and a null-origin iframe talks over Cap'n Web RPC to a dynamic worker sandbox, so XSS doesn't matter. He shows Claude adding strikethrough, centering, and an SVG box to a slide builder to fulfill a deck request. It all runs locally on workerd, the open-source Workers runtime, no containers, no database, only durable objects. He apologizes that Cloudflare's CTO stopped him from open-sourcing it today; a careful release comes soon.

The Log Is The Agent - Ishaan Sehgal, Omnara

Jun 25, 2026 · 15:11

Ishaan Sehgal, CEO of Omnara, argues that an AI agent's true identity is not the model, runtime, or tools but its append-only event log—the durable record of every user input, model output, tool call, and permission. Drawing an analogy to a video game save file that persists beyond hardware failure, he explains that treating the log as the agent enables reliability, scalability, forking, migration, multiplayer, and ownership. He warns that deepest lock-in is log lock-in: if a provider owns the log, it effectively owns the agent. Omnara's open-source managed agents platform is built around the session log as the system, not a side effect, allowing agents to survive crashes, resume across machines, and be fully owned and inspected by users.

Why Eval++ Is the Next Great Compute Primitive — Sunil Pai & Matt Carey, Cloudflare

Jun 8, 2026 · 24:51

Matt Carey and Sunil Pai from Cloudflare's agents team argue that Durable Objects — stateful serverless with 15ms London latency — and Dynamic Workers — a safe, sandboxed eval for LLM-generated code — form the next compute primitive for AI agents. They explain how Durable Objects enable resumable streaming, multi-tab sync, and background scheduling out of the box without distributed systems engineering. Dynamic Workers allow running generated JavaScript strings in isolated sandboxes, reclaiming 30 years of avoided eval. The pair tease upcoming talks: one on collapsing Cloudflare's 2,600 API endpoints into a 1,000-token MCP tool, and another on a coding agent harness built entirely on Workers that they are already shipping.

Building Agents (the hard parts!) - Rita Kozlov, Cloudflare

Jul 23, 2025 · 21:12

Rita Kozlov, VP of Product for Cloudflare's developer platform, presents the building blocks of AI agents—client, AI reasoning, workflows, and tools—arguing that effective agents require all four components. She highlights the Model Context Protocol (MCP) as a standard for exposing APIs to LLMs, and demonstrates Cloudflare's Agents SDK, which simplifies hosting remote MCP servers with built-in OAuth, state management via durable objects, and real-time WebSocket communication. Kozlov cites real-world impact: companies using agents for sales automation see 20% revenue increases, 90% faster support response times, and 50–75% time savings. She walks through a human-in-the-loop credit card approval workflow built with Nok, showing how durable objects maintain long-running state, prevent duplicate actions, and route approvals across Slack, email, or in-app notifications. The talk emphasizes that once an MCP server is deployed, it can be used directly from Cursor, Claude, ChatGPT, or a custom client, including voice interfaces via WebRTC-to-WebSocket translation.