Pi

Pi is an open-source AI agent harness and toolkit from earendil-works for building and running coding agents. Its packages provide a unified multi-provider LLM API, an agent runtime with tool calling and state management, an interactive coding-agent CLI, a terminal UI library with differential rendering, and vendor-neutral telemetry contracts and adapters. Slack and chat automation are provided through a separate package project. Pi does not provide built-in restrictions for filesystem, process, network, or credential access; it runs with the permissions of its launching user and process. The project documents containerization and sandboxing approaches, including a local Linux micro-VM, Docker, and policy-controlled sandboxing, for stronger isolation.

oh-my-pi is an open-source terminal coding agent and fork of Pi by Mario Zechner, with an IDE-oriented interface wired into the agent. It supports context-aware code edits, code search, language-server operations such as renames, debugging through debugger operations, persistent Python and Bun code-execution workers, web browsing, sub-agents, and MCP; the project describes support for dozens of model providers and includes built-in tools. It runs on macOS, Linux, and Windows, with installation options including a shell installer, Homebrew, Bun, Nix, and PowerShell.

Pi Pocket is a self-hosted, mobile-first web application for running and supervising Pi coding agents on a user's own machine or phone. It stores model calls, tool calls, subagent activity, sessions, notes, schedules, and other state in a durable database so work can continue after server restarts; the web client receives committed session updates through server-sent events. The app supports live multiplayer sessions with presence, side chat, shared notes, mentions, reactions, pins, invitations, roles, and turn-taking. Users can steer or queue tasks, inspect tool output and diffs, fork or retry sessions, use git branches and worktrees, approve plan-mode changes, schedule messages, run goals until a check passes, and open a Chromium-based browser panel. It also provides artifacts, subagents, push notifications, extensions, codemode, and an optional Lancet Guard that requires approval for selected risky calls. Pi Pocket runs on Linux, macOS, Windows, or Android through Termux, requires Node.js 22.19 or newer, and can expose the app locally, over a LAN, through a Cloudflare quick tunnel, or through Tailscale. It is distributed under the MIT license. The project warns that anyone with steering access can make Pi run commands with the permissions of the host machine, and that Pi Durable is experimental.

An extension for the Pi coding agent that delegates work to focused child-agent sessions. Pi acts as the parent session, assigning tasks to subagents and bringing their results back; foreground runs stream in the conversation, while background runs continue asynchronously and can be checked later. Built-in roles include scout for codebase reconnaissance, researcher for web and documentation research, worker for implementation, reviewer for code review and fixes, oracle for challenging assumptions, and delegate for general delegation. It supports parallel and chained workflows, saved workflows, council-style model-based reviews, artifacts, truncation, session sharing, and optional isolated worktrees. The extension is installed with `pi install npm:pi-subagents` and does not start automatic reviews unless requested in a prompt or project instruction.