Both validate.bats and new-skill.bats constructed SCRIPT using
$(dirname "$BATS_TEST_FILENAME"), which resolves to tests/ — causing
every test to fail with file-not-found. Fixed to use
$BATS_TEST_DIRNAME/../scripts/ to reach the actual scripts/ directory.
Also clarifies that bats-support/bats-assert must be installed from the
repo root (not the skill root) to match where the tests load them from,
and adds text language tags to three output-template code blocks in
skill-audit's SKILL.md.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>