nushell-pro

Write idiomatic, performant, secure, and maintainable Nushell scripts. This skill enforces Nushell conventions, catches security issues, and helps avoid common pitfalls. Pipeline input ( $in ) is NOT interchangeable with function parameters! Why this matters: Use row conditions for simple field comparisons; use closures for complex logic or reusable conditions. Refer to String Formats Reference for the full priority and rules. Quick summary (high to low priority): For stdin access in shebang scripts: #!/usr/bin/env -S nu --stdin do -i (ignore errors) runs a closure and suppresses any errors, returning null on failure. do -c (capture errors) catches errors and returns them as values. When to use each approach: Refer to Security Reference for the full guide. Nushell is safer than Bash by design (no eval , arguments passed as arrays not through shell), but security risks remain.