pub const COMMON_TOOLCHAINS: &[&str];Expand description
Binaries the pack’s scripts actually rely on, in frequency order.
Measured by grepping the 37 script-bearing skills: jq appears 437 times,
python3 317, node 184, cargo 74. NONE of these are declared in any
skill’s frontmatter — only 6 of 140 skills declare compatibility at all —
so a host that lacks them fails deep inside a bash script with
command not found. Probing up front turns that into a legible message.