Pi Coding Agent

Pi Coding Agent is a minimal agent harness for developers who want to adapt an assistant to their own workflow. Its site describes it as a tool to change the harness rather than the workflow, and it is presented as a coding agent that can be customized for tasks such as building a custom workflow extension and a custom TUI to help with commit and push steps.

The system supports extensions, skills, prompt templates, and themes, which can be bundled as Pi packages and shared through npm or git. It can also build commands, tools, providers, workflows, or UI tweaks on the fly, and its extensions are TypeScript modules with access to tools, commands, keyboard shortcuts, events, and the full TUI. The site also says Pi ships with minimal system prompt overhead, skips features such as sub-agents and plan mode in the core, and supports AGENTS.md files.

Pi offers four modes: interactive, print/JSON, RPC, and SDK. The interactive mode provides the full TUI experience; print/JSON is used for scripts and event streams; RPC uses JSON over stdin/stdout for non-Node integrations; and SDK is for embedding Pi in applications. Other listed capabilities include steering a running agent, rewinding to prior messages, branching session history, sharing the session tree, exporting it to HTML, and uploading it as a GitHub gist. The page also mentions context-management features such as auto-summarization, dynamic context injection, and on-demand skills loading.

The tool is shown with installation commands for curl, PowerShell, npm, pnpm, and bun, and the page says it supports 15+ providers and hundreds of models, including Anthropic, OpenAI, Google, Azure, Bedrock, Mistral, Groq, Cerebras, xAI, Hugging Face, Kimi For Coding, MiniMax, NVIDIA, OpenRouter, and Ollama. It can authenticate via API keys or OAuth, switch models mid-session, and add custom providers and models via models.json or extensions. Earendil Inc. is named on the site, and the page links to GitHub, npm, Discord, and X.