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Code assistant

Pi Coding Agent

Minimal, deeply customizable terminal coding agent harness.

Source rating 5.0 (56) 1.5M views 1.5M/mo traffic 0 saves Unknown
Coding Agent Terminal Harness DEVELOPER TOOLS
More categories (3)
TUI Coding Assistant Context engineering Open Source Agent Framework
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Verdict

A quick read before you dig into the full page.

Best if
You are software engineers and need: Generate shell scripts and command-line automations in print mode
Pick this when
Minimal, deeply customizable terminal coding agent harness

Overview

Pi is a minimal, highly customizable terminal-based coding harness and agent designed to adapt seamlessly to existing developer workflows. Unlike rigid, sealed products that enforce specific methodologies, Pi acts as an extensible framework where users can build or install commands, tools, providers, or custom UI tweaks on the fly. It ships with powerful default features but intentionally skips heavy, pre-baked abstractions like sub-agents, permission gates, background bash execution, or built-in plan modes. Instead, developers can easily extend Pi using TypeScript-based packages shared via npm or git, allowing it to act as a truly tailored terminal companion that can even be scripted, run in RPC mode, or embedded into third-party applications via an SDK.

Pi Coding Agent screenshot

Best for

Short scenarios where Pi Coding Agent tends to shine.

  • Generate shell scripts and command-line automations in print mode

    Best for Software engineers

  • Create highly customized development workflows by hot-reloading extensions on the fly

    Best for DevOps engineers

  • Navigate complex project histories by branching out from any previous point in a session tree

    Best for Terminal power users

  • Inject custom workspace instructions, skills, and prompt templates dynamically to save context window space

    Best for Full-stack developers

How it works

To use Pi, install it via the terminal using curl, PowerShell, npm, pnpm, or bun (for example, run `npm install -g --ignore-scripts @earendil-works/pi-coding-agent`). Once installed, developers can start an interactive TUI session, run it in print mode using `pi -p "query"` for shell scripting, or switch models mid-session using `/model` or `Ctrl+L`. Users can customize its functionality by editing configurations like `models.json` or installing extensions directly using commands like `pi install npm:@foo/pi-tools`.

Example outputs 1

Sample generations and before/after results for Pi Coding Agent.

Pi Coding Agent screenshot
Pi Coding Agent screenshot

Access & connections

Where you can use Pi Coding Agent.

Platforms

Web

Capabilities

What this tool accepts, produces, and is strongest at.

Highlights

  • Minimal terminal-based coding harness that adapts to workflows
  • Deep extensibility via TypeScript modules, extensions, skills, and templates
  • Support for 15+ AI providers and hundreds of models with mid-session switching
  • Tree-structured shareable history allowing developers to branch and navigate previous sessions
  • Advanced context engineering including auto-summarization and per-project system instructions
  • Four operational modes: Interactive (TUI), Print/JSON, RPC, and SDK integration

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In the news

Launch coverage and community mentions for Pi Coding Agent.

FAQ 5

What is Pi Coding Agent?
Pi is a minimal, highly customizable terminal-based coding harness and agent designed to adapt seamlessly to existing developer workflows. Unlike rigid, sealed products that enforce specific methodologies, Pi acts as an extensible framework where users can build or install commands, tools, providers, or custom UI tweaks on the fly. It ships with powerful default features but intentionally skips heavy, pre-baked abstractions like sub-agents, permission gates, background bash execution, or built-in plan modes. Instead, developers can easily extend Pi using TypeScript-based packages shared via npm or git, allowing it to act as a truly tailored terminal companion that can even be scripted, run in RPC mode, or embedded into third-party applications via an SDK.
How to use Pi Coding Agent?
To use Pi, install it via the terminal using curl, PowerShell, npm, pnpm, or bun (for example, run `npm install -g --ignore-scripts @earendil-works/pi-coding-agent`). Once installed, developers can start an interactive TUI session, run it in print mode using `pi -p "query"` for shell scripting, or switch models mid-session using `/model` or `Ctrl+L`. Users can customize its functionality by editing configurations like `models.json` or installing extensions directly using commands like `pi install npm:@foo/pi-tools`.
Why does Pi skip built-in features like sub-agents, plan mode, and permission popups?
Pi is aggressively minimal and designed as a set of primitives rather than a locked-down product. By omitting these default restrictions, it ensures it won't dictate your workflow. Instead, developers can use native solutions like tmux or easily install/build specialized third-party extensions to handle plans or sandboxing their own way.
How can I share or save my coding sessions?
Sessions in Pi are stored as trees. You can navigate them using the `/tree` command, export them to standard HTML files with `/export`, or upload them straight to a GitHub gist using `/share` to generate a shareable URL.
What AI model providers are supported by Pi?
Pi supports over 15 providers and hundreds of models, including Anthropic, OpenAI, Google, Azure, Bedrock, Mistral, Groq, Cerebras, xAI, Hugging Face, Kimi For Coding, MiniMax, OpenRouter, and Ollama. You can seamlessly switch models mid-session using `/model` or `Ctrl+L`.
Pi Coding Agent
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