ccusage Nushell

Use this skill for repository scripts written in Nushell, especially under .github/scripts/ and apps/ccusage/scripts/.

Runtime Shape

• Prefer executable .nu scripts with a Nix shebang over adding nushell to a GitHub Actions profile install.
• Use #!/usr/bin/env nix plus a nix shell --inputs-from line when the script needs tools that should be pinned by the flake.
• Keep the shebang tool list to commands the script directly invokes.
• It is acceptable for a Nu script to call external tools such as gh, jq, git, hyperfine, pnpm, node, or bun when those tools are the right boundary. Prefer the shebang Nix shell to global installs.

Example: