PiX - The session is a tree — fork any turn, switch branches

PiX is a free desktop workbench for the pi coding agent. AI chats are a single line — try a new idea and you restart, or keep asking until context is a mess. PiX turns the session into a graph: every turn is a node, any node can sprout a new branch. Fork any message, clone a branch as a checkpoint, compare up to 3 branches side by side, inspect reasoning and tool calls — context follows the active branch automatically. For exploring refactors, options, and parallel tasks in one graph.