Pi coding agent

Key features

• Sub-agents — spawn isolated jobs and watch the full run unfold in the TUI / job logs, without stuffing every turn into the parent context
• @ — fuzzy file mention picker (type @ and start typing a path)
• phi sessions list — list session id, mtime, and preview for the current directory
• Pay 0 schema tokens until you call one.
• Hashline edits — edit by line + content hash (same idea as oh-my-pi): the model points at anchors instead of rewriting whole files