skill: positive framing pass — nginx, setup, update, astro, docs-deployment
nginx: broken config→valid config, fails→reports error, won't start→status check,
BIO_new_file() failed→certificate file missing, common causes→things to check
setup: broken/missing→needs repair, failed to load→need build tools,
fix each→resolve each, Common causes→What to check
update: broken state→consistent state, tests fail→tests don't pass,
unfixable→not immediately resolvable, won't start→needs attention
astro: fails because→requires
docs-deployment: broken→needs rollback, Check for broken symlinks→Verify symlinks