Codegeist: A Real AI Coding Workflow in an Open-Source Java Project

Published: 29 July 2026
on channel: Codegeist AI
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Codegeist is an open-source coding agent developed in Java.

This full developer walkthrough shows the real engineering workflow behind the project: start from the public GitHub repository, clone its shared devcontainer and agent kits, open the workspace in VS Code, start OpenCode, and follow a small real task through planning, implementation, native build, focused tests, review, and a local Git commit.

The point is not only the result. The repository, runtime, agent rules, proof, and review path stay visible and reproducible.

Explore Codegeist:
https://codegeist.ai
https://github.com/codegeist-ai/codegeist

Join the developer community:
https://discord.gg/nh7XUkmsW7

Follow Codegeist AI:
https://x.com/codegeist_ai

Chapters:
00:00 Codegeist builds itself with AI
00:10 Why this matters for developers
00:28 Open the public Codegeist repository
00:46 Clone the repository
01:04 Explain the two shared kits
01:25 Why the kits use main and release
01:45 What .devcontainer means
02:06 What .opencode means
02:28 Open Codegeist in VS Code
02:45 Start the devcontainer
03:06 Start OpenCode
03:32 Let the agent solve a small real task
06:24 Review the result like a developer
07:37 The Codegeist workflow


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