I have created a simple .sh command to do the testing using browser-use and add how to prompt this command in CLAUDE.md because it has to run a shell command, it is more deterministic than Skills. And it uses near to zero of context window compared to MCP.

Recently, I have found myself getting more interested in shell commands than MCPs. There is no need to set it up. Debugging is far easier. And I would be free to use whichever model I like ot use for a specific function. For example, for Playwright, I use GPT-5 just because I have free credits. I could save my Claude Code Quota for more important tasks.