All 94 skillsLanguages12 of 12

stryx:shell

When writing or fixing a script or a tricky command line: PowerShell, Git Bash, batch files.

/stryx:shell

Inside its piece: 7 specks, one for each file on its shelf. Its eleven group-mates glow on the open book behind it. The light splits toward green, the band of Languages.

In numbers

counted 2026-10-12 in the installed set
  • 5reference files
  • 7files in the skill
  • 104KB on disk
  • 6chapters

Use it when

in the skill’s own words

When writing, fixing or reviewing a shell script or a tricky command line

    • PowerShell 7 or Windows PowerShell 5.1 (.ps1, .psm1)
    • Git Bash on Windows
    • POSIX sh or bash (.sh)
    • cmd batch files (.bat, .cmd)
    • an npm script
    • a CI run step or a hook's script file
  • When a command behaves differently between shells
    • quotes or arguments that arrive mangled
    • exit codes ($LASTEXITCODE, ERRORLEVEL) that do not stop the script
    • set -euo pipefail
    • NativeCommandError
    • delayed expansion
    • a batch file that stops after npm
    • BOM
    • mojibake
    • UnicodeEncodeError charmap in piped output
    • CRLF vs LF
    • paths with spaces
    • & or !
    • Git Bash turning /flags into paths
    • a file named nul
    • --help opening a browser for npm and git
    • calling one shell from another

Not for

another skill does it

Inside the book

6 chapters, by title only
  1. Procedure
  2. Skeletons
  3. Quick reference: the same thing in each shell
  4. Windows traps (all tested)
  5. Linux, WSL and CI traps (tested with dash 0.5.12 and bash 5.2)
  6. Verification: what a pass looks like

Works with

the skills it names most

Claude loads it by itself when the moment comes; by hand, type the line at the top. It comes with the whole set: Installs all 94 skills, 32 agents and the brain program as one set. The skill’s own text is private source and is not shown here.