How to Build LoopX from Source: Complete Python 3.11+ Installation Guide

To build LoopX from source, clone the repository, ensure Python 3.11 or newer is installed, upgrade pip/setuptools/wheel, then run pip install . for a standard install or pip install -e . for editable development mode.

LoopX is a pure-Python package with optional JavaScript/TypeScript assets that powers a local-first control plane for long-running AI agents. Building it from source gives you the latest features, lets you contribute patches, or customize the behavior for specialized deployments. This guide walks through the complete build process using the actual source structure from the huangruiteng/loopx repository.

Prerequisites: Python 3.11+ and Git

LoopX deliberately targets modern Python. The requires-python field in pyproject.toml enforces Python 3.11 or newer — older versions will be rejected during installation.

Verify your environment before proceeding:

python3 -V   # Must output 3.11.x or higher

git --version

If your system Python is older, use pyenv, conda, or uv to install a compatible version.

Step 1: Clone the LoopX Repository

Retrieve the source tree from GitHub. The repository root contains the package definition, all capability modules, and bundled frontend assets.

git clone https://github.com/huangruiteng/loopx.git
cd loopx

The loopx/ directory contains the main package code, including loopx/entrypoint.py where the CLI is defined.

Step 2: Upgrade Build Dependencies

The project uses setuptools as its sole build backend. Upgrade your packaging tools to avoid compatibility issues with the setuptools==83.0.0 requirement specified in pyproject.toml.

python3 -m pip install --upgrade pip setuptools wheel

Step 3: Build and Install LoopX

You have three installation modes depending on your use case:

Standard Production Install

Compiles a wheel into dist/ and installs LoopX into your active environment:

python3 -m pip install .

After installation, verify the CLI works:

loopx doctor   # Runs the built-in health-check command

Editable Development Install

Use -e . when you plan to modify source code. Changes reflect immediately without re-installation:

python3 -m pip install -e .

This creates a link to your source directory, ideal for debugging or contributing to huangruiteng/loopx.

Install with Optional Dependencies

LoopX declares optional extras under [project.optional-dependencies] in pyproject.toml. For example, to include the DeepSeek harness:

python3 -m pip install .[deepseek-harness]

Building a Wheel Without Installation

To generate a distributable .whl for sharing or private index upload:

python3 -m pip install build   # One-time install

python3 -m build               # Creates dist/loopx-*.whl

The wheel appears in dist/ and can be installed later with pip install dist/loopx-*.whl.

Understanding the Build Configuration

The build backend is declared in pyproject.toml using standard PEP 517 format:

[build-system]
requires = ["setuptools==83.0.0"]
build-backend = "setuptools.build_meta"

Key sections in this file control:

• Package metadata — name, version, description
• Entry points — [project.scripts] maps loopx to loopx.entrypoint:main
• Package data — tool.setuptools.package-data bundles JavaScript/TypeScript assets (no separate Node build required)
• Optional dependencies — extras like deepseek-harness

Verifying Your Build

After installation, confirm LoopX is accessible:

which loopx           # Shows installation path

loopx --help          # Lists available commands

loopx doctor          # Validates environment health

The loopx doctor command exercises the core initialization path through loopx/__init__.py and the CLI entry point in loopx/entrypoint.py.

Troubleshooting Common Issues

• Python version errors: Double-check python3 -V matches 3.11+; the installer strictly enforces this via requires-python = ">=3.11"
• Setuptools version mismatches: Upgrade with pip install --upgrade setuptools if you see backend errors
• Missing CLI command: Ensure your PATH includes the pip scripts directory, or use python3 -m loopx as fallback

Summary

• Clone https://github.com/huangruiteng/loopx.git to obtain source
• Require Python 3.11+ — enforced by pyproject.toml
• Upgrade pip setuptools wheel before building
• Install with pip install . (production) or pip install -e . (development)
• Optional extras available via pip install .[extra-name]
• No Node build needed — JavaScript assets are pre-bundled as package data

Frequently Asked Questions

Do I need Node.js or npm to build LoopX from source?

No. While LoopX includes TypeScript/JavaScript assets for features like the opencode goal-mode plugins, these are shipped as pre-built package data per tool.setuptools.package-data in pyproject.toml. The standard pip install . process handles them automatically without any Node toolchain.

Why does LoopX require Python 3.11 specifically?

The requires-python = ">=3.11" constraint in pyproject.toml reflects deliberate use of modern language features and standard library improvements. The setuptools backend enforces this at installation time; attempting to install on Python 3.10 or earlier will fail with an explicit version conflict error.

How do I uninstall or upgrade a source-built LoopX?

Use standard pip commands: pip uninstall loopx removes it completely. For upgrades, pull latest source with git pull, then re-run pip install . (or pip install -e . for editable installs). The build process automatically increments to the new version declared in pyproject.toml.

Where does the loopx command come from after installation?

The CLI entry point is declared in pyproject.toml under [project.scripts] as loopx = "loopx.entrypoint:main". When you run loopx, pip creates a wrapper that executes the main() function in loopx/entrypoint.py, which then dispatches to subcommands like doctor and run.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}