Regex Lab

Gives Claude three regex operations: test patterns against strings, perform find and replace with capture groups, and validate regex syntax. The kind of tool you want when you're debugging a gnarly pattern in production code or need to batch process text transformations without switching to a REPL. It's part of the sovereign-mcp-servers collection, which means it follows the same npx installation pattern as the other 33 servers in that toolkit. Useful for validating user input patterns, sanitizing data, or just confirming your regex actually does what you think it does before committing it.