save-cost

Install CLI tools like gh, jq, ast-grep, and duckdb that return filtered output instead of raw files or HTML. The skill installs them via your package manager and documents usage rules in CLAUDE.md so future sessions apply them automatically.

Group A tools include gh for GitHub API JSON, jq and yq for filtering JSON/YAML, ast-grep for AST-based code search, uv for fast Python packaging, and duckdb for SQL queries over CSV or Parquet files.

Yes, it detects the OS and available package manager automatically. Windows uses winget with scoop fallback, macOS uses Homebrew, and Linux uses apt, dnf, or pacman with cargo or npm fallbacks for missing packages.

These are interactive or long-running programs that wait for user input and would freeze the session if invoked through Bash. They are installed only for the user to open in a separate terminal, except fzf --filter which is non-interactive.

The skill tries the fallback method listed in the OS reference file, such as scoop instead of winget or cargo instead of apt. If it still fails, it searches for the correct package ID and reports the failure explicitly rather than skipping silently.

No, the CLAUDE.md section is wrapped in save-cost:start and save-cost:end marker comments. On re-runs the content between markers is replaced instead of appended, keeping the file idempotent.