Ultralytics Dev
Ultralytics Platform API and YOLO26 training skills, format hooks, push guard.
- Type
- Plugin
- Repository
- fcakyon/claude-codex-settings
- GitHub stars
- 1.2k
- License
- Apache-2.0
- Repo last updated
- Sep 24, 2026
- Version
- 2.4.0
- Author
- Fatih C. Akyon
What Ultralytics Dev is
Ultralytics Dev is a plugin published in the fcakyon/claude-codex-settings repository on GitHub, which has about 1.2k stars. The repository describes itself as: “Battle-tested Claude Code, OpenAI Codex, Cursor configs, plugins, hooks and agents with Kimi, MiniMax and GLM API support.”
A plugin is a package that bundles skills, slash commands, subagents, hooks, and MCP connectors so they install together. Plugins are plain files with a manifest at .claude-plugin/plugin.json, and they work in both Claude Code and Claude Cowork.
Installing Ultralytics Dev adds everything it ships in one step. Connectors inside a plugin still need to be connected separately, and hooks and subagents only run in Cowork and Claude Code, not in regular chat.
How to install Ultralytics Dev
Claude Code
- Add the repository as a plugin marketplace: claude plugin marketplace add fcakyon/claude-codex-settings
- Install the plugin: claude plugin install ultralytics-dev@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json.
- Restart the session if the new skills or commands don't appear straight away.
Claude Cowork
- Open Customize → Plugins and choose Add marketplace.
- Enter fcakyon/claude-codex-settings (the owner/repo shorthand works for GitHub).
- Find Ultralytics Dev in the list, click Install, then connect any connectors it needs from its Connectors tab.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
We couldn't retrieve the source file for this entry. Browse the repository on GitHub to find it and read the README before installing.
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Ultralytics Dev?
Ultralytics Dev is a plugin for Claude Code and Claude Cowork from the fcakyon/claude-codex-settings repository on GitHub. Ultralytics Platform API and YOLO26 training skills, format hooks, push guard.
How do I install Ultralytics Dev in Claude Code?
Add the repository as a plugin marketplace: claude plugin marketplace add fcakyon/claude-codex-settings Install the plugin: claude plugin install ultralytics-dev@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json. Restart the session if the new skills or commands don't appear straight away.
Can I use Ultralytics Dev in Claude Cowork?
Open Customize → Plugins and choose Add marketplace. Enter fcakyon/claude-codex-settings (the owner/repo shorthand works for GitHub). Find Ultralytics Dev in the list, click Install, then connect any connectors it needs from its Connectors tab.
Is Ultralytics Dev safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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