Open Source Summit + Embedded Linux Conference North America 2026

AI agents don’t execute a single path, they explore many. They try different code changes, commands, or configurations in parallel, then keep the one that works. Today, running this safely on Linux requires fragile combinations of temp directories, git tricks, containers, or VM snapshots.

This talk introduces branch contexts, a new Linux execution model built for AI agents. A branch context gives each exploration path an isolated, copy-on-write filesystem and coordinated process group, with a simple lifecycle: fork, explore, commit or abort. The first successful branch commits atomically; all others are automatically invalidated.

We present two Linux implementations: BranchFS, a FUSE-based branching filesystem with O(1) branch creation and atomic commit without root privileges, and branch(), a proposed Linux syscall that composes filesystem branching, namespaces, and process lifecycle management into a single atomic operation.

We’ll explain why existing Linux mechanisms fall short for agent workloads and how fork/explore/commit semantics fit naturally into the future of Linux process and filesystem design.