Here's a sentence I genuinely didn't expect to write this week: Zed, the company behind the popular Rust-based code editor, has turned off pull requests on its own product's repository. On Wednesday, Zed Delta — the company's multiplayer environment for coding with AI agents — moved into public beta, and the team is openly betting that the 15-year-old pull request workflow can't survive a world where agents write most of your code. If you write software for a living, or you're a student hoping to, this is one of those shifts worth understanding before it lands on your team.
01.What Zed just launched
Zed Delta is a standalone app from the creators of the Zed editor (the company was founded in 2021 by veterans of GitHub's Atom editor team, including CEO Nathan Sobo). It's built around a simple but radical premise: when a conversation with an AI agent is the primary way code gets written, the conversation itself — not a stack of diffs — should be the unit of work. Anyone can now download Delta for macOS, Linux or Windows, use it in the browser without installing anything, and follow threads from a mobile browser on the go. And during the public beta, it's completely free.
02.Why pull requests break with agents
Pull requests have been the standard way to review code since GitHub introduced them over 15 years ago. The problem, as Sobo sees it, is that a PR shows reviewers a finished diff — the what — while hiding the reasoning behind it: the discussion with the agent, the decisions made along the way, the dead ends that were tried and discarded. When humans wrote small, hand-crafted changes, that was fine. But with agents generating enormous amounts of code, the diffs we're asking each other to review have, in Sobo's words, "mushroomed". Reviewing a 3,000-line PR with zero context about why half of it exists is nobody's idea of a good workday.
03.Threads, not tickets
Delta's answer is the thread. A thread is a running record of an agent-assisted task where the conversation and the code stay connected. You give an agent a job, keep refining it, and then share the entire body of work with a teammate — who can join as a full participant, ask the same agent why it chose a Mutex instead of an RwLock, or pick up where you left off if you log off for the day. Under the hood, a system called DeltaDB extends Git's versioning by recording every edit and message between commits, so the messy middle of development is preserved instead of discarded. Crucially, Git still works: branches, commits and remotes behave normally, and teammates who never open Delta just see a regular repository.
04.570 changes, zero pull requests
The stat that made me sit up: Zed disabled pull requests on Delta's own repository last week, and since then 33 people on the team have landed 570 changes to main — entirely through Delta threads. That's a real company dogfooding a post-PR workflow on its flagship product, not a demo. To be fair, Zed isn't deleting GitHub overnight; the main open-source Zed editor repo stays where it is, since hundreds of contributors depend on it, and contributors can share Delta threads alongside conventional PRs. But Sobo is blunt about the direction: "everyone is in a race to replace GitHub right now." It's hard to look at the AI agents landing everywhere — even ones that have reportedly developed their own secret language, or the ones now running smart homes through Google Home's MCP support — and doubt that the tooling around them is due for a rebuild.
05.What it costs (and what comes next)
During the public beta, Delta is free. Paid plans for individuals and teams are coming, and Zed has committed to always keeping a free version. The roadmap includes repository features that use a GitHub repo's existing permissions to control access to shared Delta threads. If you're experimenting with agents in your own projects, one practical warning from anyone who's run up an API bill: agents that generate this much code can get expensive fast, so it pays to understand token costs and model choice before you point an agent at your whole codebase — the cost-optimization chapter in our GPT-6 Astra — Zero to Hero Guide was written exactly for this moment.
Key Takeaways
- Zed Delta is in public beta — free on macOS, Linux, Windows and the web
- It replaces the pull request with the thread: a shared conversation between developers and agents, with full context preserved
- Zed's own team has shipped 570 changes with no pull requests since turning them off on Delta's repo
- Git still works normally underneath — DeltaDB just preserves the work between commits
- Paid plans are coming, but a free version will always exist
Frequently Asked Questions
What is Zed's Delta?
Zed's Delta — a multiplayer environment for coding with AI agents — is now in free public beta on macOS, Linux, Windows and the web. Zed disabled pull requests on its own repository and shipped 570 changes through Delta threads instead.
Why did Zed replace pull requests?
The core idea is that agents write so much code that the old review-a-giant-diff workflow can't keep up. Delta is free during the beta; paid plans are coming, but a free version will always exist.
What This Means for You
India has one of the largest populations of working developers on the planet, and a huge share of our IT industry literally runs on the PR-based review workflow. If Delta-style threads catch on, code review shifts from reading diffs to directing and interrogating agents — a different skill, and one worth picking up early. Students, my honest advice: still learn Git properly, because it isn't going anywhere. But also go download the free beta, kick off an agent on a side project, and get comfortable working with one instead of just reading its output. And when you need a structured way to review what the agent wrote, our AI Coding Playbook 2026 covers the spec-first workflow and review checklists for exactly this. If you want a structured head start on agents, prompting and keeping costs sane while you experiment, the GPT-6 Astra — Zero to Hero Guide is the fastest path we know of.