Install And Update Skills

Use this for installing and updating Agent Skills through npx skills.

Common Contract

Ask for scope when the user did not specify global or project.
Preserve unrelated local skill files and lock mismatches. Report them instead of rewriting around them.

Use the exact install commands in this workflow for default installs.
Do not infer filesystem paths from --agent flag names.
Do not use --agent '*', --all, or all-agent installation unless the user explicitly names the extra agent targets.
Do not use --copy.
Global installs use ~/.agents/skills as the canonical store and ~/.claude/skills as the Claude Code symlink target.
Project installs create project-local agent paths under .agents/skills and .claude/skills; treat project .claude/skills entries as copied directories unless the filesystem proves they are symlinks.
If a source exposes multiple skills and the user did not name the exact skill or skills, list the available skills with their purpose and ask the user to choose.