xmllint
Installation
SKILL.md
xmllint
Parse, validate, format, and query XML documents. Part of the libxml2 toolset.
Prerequisite Check
Run this before proposing validation or XPath workflows:
command -v xmllint >/dev/null 2>&1 || xmllint --version
If xmllint is missing, surface that first and either run scripts/install.sh or scripts/install.ps1, or fall back to xq for query-oriented work and xml2 for shell-pipeline transformations.