Monday handoff is a branch name, a gist and a dumped agent transcript while your coworker heads on vacation. Richard Feldman told AI Engineer that handoff forces the next engineer into agent archaeology, digging through commits to guess why a decision was made.
You do not need a better snapshot, you need the whole thread.
Delta is a native app for Mac, Linux and Windows, with mobile to match. A thread in Delta is the shared place where chat, code changes and review live together. An agent transcript, the log of prompts, tool calls and edits, stays attached instead of pasted into a doc. In the demo Feldman asked his agent about notification permission logic on Opus 5.5, then at-mentioned coworker Bennett on whether an error should be a toast or an inline error, and Bennett replied that he liked inline better, Feldman said.
That tiny choice stays in the thread where any future agent with access can see it was casual, not deep research. Feldman showed a 2,000-line diff with line-level comments that route straight to the agent, plus approve or reject for formal review, he said. Bennett can edit directly and spin subthreads to isolate context, and his terminal output syncs live into the thread. Terminal viewing is read-only, Feldman said, because writable access would mean remote code execution.
Joining pulls a Delta work tree, a fast repo mirror that is not a Git work tree, so each person gets a local checkout and can run a different agent. Delta is model and harness agnostic, Feldman said. The demo used Opus 5.5, with a Claude Code plug-in in progress and support for a ChatGPT subscription and Claude Code subscription via ACP. The team behind Delta previously built the Zed IDE, Feldman said, which is why line-level review is central.
It has not been stress tested at large scale, Feldman said, beyond 30 to 40 person standups in one thread. Sync infrastructure runs on Delta cloud as of the demo, with a first on-premises pilot underway for regulated users, he said. Private beta is free, pricing is to be determined, and details will be posted at delta.dev. If rationale stays trapped in lost chats, every future fix still starts with guessing.
