diff --git a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md
index 99b22c1..60628eb 100644
--- a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md	
+++ b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-09-Polish.md	
@@ -37,7 +37,7 @@ This phase performs final integration, accessibility audit, responsive testing,
 - [x] `npx vitest run --coverage` passes with ≥80% coverage on new components. Notes: ran in `frontend/` (overall coverage 83.48%); warnings emitted about `--localstorage-file` missing a valid path.
 - [x] `ruff check backend/` — zero errors. Notes: ran `ruff check backend/` (all checks passed).
 - [x] `npx eslint src/` — zero errors. Notes: ran `npx eslint src/` in `frontend/` with no issues.
-- [ ] `npx prettier --check src/` — zero errors
+- [x] `npx prettier --check src/` — zero errors. Notes: ran `npx prettier --check src/` in `frontend/` (all matched files formatted).
 - [ ] No `any` types in TypeScript
 - [ ] WCAG 2.1 AA compliant (ARIA labels, keyboard nav, contrast ratios)
 - [ ] Responsive at 320px, 768px, 1024px, 1440px, 2560px — no layout issues