How we can secure 50% of the world's software. Traditionally, formal methods have been mostly used for safety-critical systems like operating systems, hypervisors, and databases. We're extending this to formally and empirically verify code correctness and security for full-stack web apps, one of the most common types of applications*, using the Proof-Driven Development Kit (PDD Kit). Coding agents now write code faster than anyone can review effectively. PDD Kit turns what the developer meant into a Verus specification. It then proves the AI-generated code meets that spec for every input. Researchers @alexlavaee, @MatthaiP39719, @Mappletons, and @k_cieslak break down Proof-Driven Development x Chopin in the blog here: *44.4% of respondents work as full-stack (27.3%), back-end (13.5%), or front-end (3.6%) developers. Stack Overflow Developer Survey 2026, n = 25,767.

How do you _guarantee_ your agent's code is correct? You prove it. Introducing Proof Driven Development Kit (PDD Kit) from @MSFTResearch. PDD Kit helps turn your plan into a formal spec, then proves the agent's code meets that spec for every input. No vibe verification. PDD Kit is integrated with @GitHubNext's Chopin, so you can plan as a team. PDD Kit takes an app's login flow from intent to a verified pull request: It discusses your code, infers your intent as it goes, and proposes a formal spec in Verus, a proof language for Rust. Once you approve the spec, the Verus verifier automatically proves the code meets it. Where proof isn't possible, it falls back to empirical verification with tests and computer-use agents (CUAs). It works on Rust today. No new language, no change in how you produce the underlying code, making formal methods more accessible. The goal is a verified software factory, where engineers review specifications instead of code. Come see it in action at GitHub Universe, Oct 28–29. Swing by the Speakeasy and ask for GitHub Next!

Messing around with @typesafeai Jev for real-time styling 🔤 🔜 🎨 If you can define a bounded, semantically meaningful property space, you can project a natural language expression into that space in one generation step

lowkey tired of being a magnet for karma farmers with hot takes. Nuance should be celebrated. GitHub is working hard on dealing with the sheer volume of code that agentic software engineering produces. And at the same time, it is incredibly frustrating to all our users and customers that we aren't there yet. And at the same time, we would be derelict in our duty to developers if we weren't sweating to understand the future shape of things. All of these can be true at once

A new project from GitHub Next! Chopin is a real-time, multiplayer agentic planning environment. Designed to get your whole team aligned on the plan before you hand it off to agents. We find our current agent planning tools feel cumbersome, static, lonely, and drown us in walls of text. We're exploring how we can make planning more interactive, shared, and visual 🖌️ It's currently an early prototype but we'll be developing it more over the coming months – and it's open source!