diff --git a/openspec/changes/code-review-fix/tasks.md b/openspec/changes/code-review-fix/tasks.md
index 32ae428..35c6803 100644
--- a/openspec/changes/code-review-fix/tasks.md
+++ b/openspec/changes/code-review-fix/tasks.md
@@ -83,7 +83,7 @@
 
 - [x] 9.1 `[sonnet]` Create `src/types/candles.ts` with `Candle` interface
 - [x] 9.2 `[sonnet]` Create `src/types/annotations.ts` with `Annotation`, `AnnotationType`, `Geometry` interfaces
-- [ ] 9.3 `[sonnet]` Create `src/types/charts.ts` with `Chart` interface
+- [x] 9.3 `[sonnet]` Create `src/types/charts.ts` with `Chart` interface
 - [ ] 9.4 `[sonnet]` Create `src/types/predictions.ts` with `PredictionSpan`, `PredictionState`, `ModelInfo` interfaces
 - [ ] 9.5 `[sonnet]` Create `src/types/span-annotations.ts` with `SpanAnnotation`, `SpanLabelType`, `SubSpan` interfaces
 - [ ] 9.6 `[haiku]` Create `src/types/index.ts` barrel file re-exporting all types