Pi Extensions

Extensions for the pi coding agent harness:

• pi-jev-guard: A pre-execution guard rail extension for pi where JEV scores and gates mutating tool calls against safety questions before execution.
• pi-read-only: A read-only mode extension for pi that restricts the agent to research, exploration, and discussion without modifying files or executing destructive operations.
• pi-subagents: Simple subagents for pi 1.0+. Adds a subagent tool where each subagent is a fresh, headless pi child session: it gets a task and returns only its final text — skills are the role system.
• pi-openrouter: OpenRouter account contexts per project directory, session tagging, model catalog sync, and usage/spend overlays for pi.
• pi-auto-handoff: Automatically hands your session off to a fresh context when the context window runs low (default: 20% remaining) — the agent writes a proper handoff document, then a brand-new session continues from it.