Add PATH-05: no file path references into another skill directory.
Skills are encapsulated — external consumers must use skill:name syntax,
not reach into internal files. Also tighten WF-03 to cross-reference
PATH-05 so vague "legitimate external path" no longer permits
cross-skill file paths.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
SKILL-05 checks that SKILL.md name matches the directory name.
REF-01 checks that every {variable} traces to frontmatter, config,
or runtime — exempts {{double-curly}} template placeholders.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>