The Agentskills, The Claude Code and The ironly
2 min read
If you using Claude Code/Cursor/OpenCode,etc., you might see or write these files before CLAUDE.md, .cursor/rules/, .github/copilot-instructions.md, .opencode/, etc. This happened because at the early of adoption AI these is no standard for write AI intstruction file yet. So everyone come up with their idea and create their own specification.
Your project structure become a mess for support multiple tools
.
├── .cursor
├── .github
├── .opencode
└── .windsurfrules
...
Later on, it become AGENTS.md standard. No more need for a specific folder if your instructions are all same, you can just create a single AGENTS.md file and all tools will understand
Then in December 2025, Antropics announced a new concept Agent skills. A new way to give instruction more smarter. Their also published as an open standard
Agent skills is now become an open standard that any agent can use. The goal is to make a skills more portable and sharable by standardize skill files into .agents/skills folder, so you don’t need a separate folder per tool e.g. .codex/skills/, .opencode/skills/, etc.
All the popular tools support it, sounds happy right?
Except one… and only one
Claude code from Antropics…
Every others popular tools all supports it
- OpenAI Codex CLI
- Cursor
- Gemini CLI
- OpenCode
- Pi
- Antigravity
- List go on. You can see official list on agentskills.io
Except one and only ONE that the most popular in developer environment (or at least what I think)
Claude code from Antropics, Is that ironly?
Antropics, who created Claude code and also created and published the Agent Skills open standard, yet hasn’t implemented it in their own Claude Code
You might ask: “Wait, Claude Code is support skill, what are you talking about?”
That’s right! Claude Code supports agent skills BUT in its own specific folder .claude/skills/ not .agents/skills like other tools (Github issues)
It also don’t supports AGENTS.md!!! (same Github issues)
Why Antropics, why?
I don’t know what they’re thinking, but looks like their’re trying to be special by not supporting the standard. At least, please implement the one you created. Are they intentional not supporting all of these to make it harder for developer to migrate to other tools? I don’t know. But, now they make everyone life
In the meantime, workaround is just copy or symlink from .agents/skills to .claude/skills.
.
├── .agents
│ └── skills # source
└── .claude
└── skills # symlink
