Plugins

Pi-style append-only multi-branch session trees: fork or jump to any historical node without deleting history, clone a branch into a new session, and browse the tree in a WebUI panel. Works on stock Harness via graceful degradation.

Git-like immutable session lineage for DeepSeek Harness

Replaces the left sidebar session list with a tree of every session and its nested subagent descendants, with click-through to each conversation's multi-turn history and a tree_send tool for messaging any continuable session anywhere in the tree.