fx - Coding Agent icon
fx - Coding Agent icon

fx - Coding Agent

Tiny, open, native coding agent. A minimal CLI written in Zig, optimized for research and embeddability as part of larger systems.

fx - Coding Agent screenshot 1

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Platforms

  • Linux
  • Mac
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Features

Properties

  1.  Lightweight
  2.  AI-Powered
  3.  Minimalistic

Features

  1.  No registration required
  2.  Ad-free
  3.  Works Offline
  4.  Embeddable

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fx - Coding Agent information

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GitHub repository

  •  3,026 Stars
  •  347 Forks
  •  240 Open Issues
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What is fx - Coding Agent?

fx is a coding agent harness and CLI written in Zig, optimized for research and embeddability as part of larger systems.

It focuses on minimalism and performance across the board, from system prompt design to its tools, feature set, and 7.8 MiB binary.

For end users, its CLI output style and form factor aim to be closer to a Unix shell than a heavy "IDE in the terminal" TUI.

It's open source (Apache-2.0), model-agnostic, and suitable for both local and cloud inference.