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Dev tools · August 21, 2026

Lunar, a coding harness extensible with Lua

Hi all! Sharing a small pet project my agents and I have been working on: Lunar, a coding harness configurable and extensible via Lua scripts. I'm already using Lunar to develop Lunar :) Give it a try! Soon you will be able to extend it using Lua hooks.

What it does

a Lua-scriptable experimental coding harness. Contribute to gszr/lunar development by creating an account on GitHub.

Lunar gives the model four tools— read , write , edit , and bash . No hidden system prompts Lunar is deliberately small: a Rust host owns the terminal, model transport, and four tools, while a Lua guest supplies model and provider configuration. It does not impose plan modes, sub-agents, approval prompts, or another workflow between you and the model. Context stays inspectable. Lunar sends your project's AGENTS.md , CONTEXT.md , and skill summaries as a visible user message—never a hidden system prompt. Conversations are durable, linear missions you can leave and resume. cargo install --git https://github.com/gszr/lunar Configure Configure Lunar with ~/.lunar/control/init.lua . A project…from github.com

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