plan-tune, office-hours, retro: read gate and profile files from the state root (E1 follow-up)

test/skill-validation.test.ts

@@ -471,7 +471,8 @@ describe('Cross-skill path consistency', () => {
 
   test('retro/SKILL.md reads global greptile-history (not per-project)', () => {
     const content = fs.readFileSync(path.join(ROOT, 'retro', 'SKILL.md'), 'utf-8');
-    expect(content).toContain('~/.gstack/greptile-history.md');
+    expect(content).toContain('the path `GREPTILE_HISTORY` printed');
+    expect(fs.readFileSync(path.join(ROOT, 'bin', 'gstack-retro-metrics'), 'utf-8')).toContain('$_GH/greptile-history.md');
     // Should NOT reference per-project path for reads
     expect(content).not.toContain('$REMOTE_SLUG/greptile-history.md');
   });