merge: incorporate origin/main into community-mode branch

Resolve conflict in gen-skill-docs.ts by keeping both the detailed
error field instructions (community-mode) and the new Plan Status
Footer section (main).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/skill-check.ts

@@ -35,6 +35,7 @@ const SKILL_FILES = [
   'benchmark/SKILL.md',
   'land-and-deploy/SKILL.md',
   'setup-deploy/SKILL.md',
+  'cso/SKILL.md',
 ].filter(f => fs.existsSync(path.join(ROOT, f)));
 
 let hasErrors = false;