diff --git a/benchmarks/large-stream-profile.ts b/benchmarks/large-stream-profile.ts
index d383856..f40c238 100644
--- a/benchmarks/large-stream-profile.ts
+++ b/benchmarks/large-stream-profile.ts
@@ -3,7 +3,7 @@
 import { performance } from "perf_hooks";
 import { buildSplitRows } from "../src/ui/diff/pierre";
 import { buildReviewRenderPlan } from "../src/ui/diff/reviewRenderPlan";
-import { measureDiffSectionMetrics } from "../src/ui/lib/sectionHeights";
+import { measureDiffSectionMetrics } from "../src/ui/lib/diffSectionMetrics";
 import { resolveTheme } from "../src/ui/themes";
 import {
   createLargeSplitStreamFiles,
diff --git a/src/ui/components/panes/DiffPane.tsx b/src/ui/components/panes/DiffPane.tsx
index ba6fa59..e6672af 100644
--- a/src/ui/components/panes/DiffPane.tsx
+++ b/src/ui/components/panes/DiffPane.tsx
@@ -15,7 +15,7 @@ import {
   measureDiffSectionMetrics,
   type DiffSectionMetrics,
   type DiffSectionRowMetric,
-} from "../../lib/sectionHeights";
+} from "../../lib/diffSectionMetrics";
 import {
   buildSectionLayoutMetrics,
   findHeaderOwningSection,
diff --git a/src/ui/lib/sectionHeights.ts b/src/ui/lib/diffSectionMetrics.ts
similarity index 100%
rename from src/ui/lib/sectionHeights.ts
rename to src/ui/lib/diffSectionMetrics.ts
diff --git a/test/section-heights.test.ts b/test/diff-section-metrics.test.ts
similarity index 97%
rename from test/section-heights.test.ts
rename to test/diff-section-metrics.test.ts
index c87abfe..475a2fa 100644
--- a/test/section-heights.test.ts
+++ b/test/diff-section-metrics.test.ts
@@ -1,6 +1,6 @@
 import { describe, expect, test } from "bun:test";
 import type { VisibleAgentNote } from "../src/ui/lib/agentAnnotations";
-import { measureDiffSectionMetrics } from "../src/ui/lib/sectionHeights";
+import { measureDiffSectionMetrics } from "../src/ui/lib/diffSectionMetrics";
 import { resolveTheme } from "../src/ui/themes";
 import { createDiffFile, createHeaderOnlyDiffFile, lines } from "./fixtures/diff-helpers";
 
diff --git a/test/ui-components.test.tsx b/test/ui-components.test.tsx
index 97192b9..f4572b2 100644
--- a/test/ui-components.test.tsx
+++ b/test/ui-components.test.tsx
@@ -5,7 +5,7 @@ import { parseDiffFromFile } from "@pierre/diffs";
 import { act, createRef, type ReactNode } from "react";
 import type { AppBootstrap, DiffFile } from "../src/core/types";
 import { resolveTheme } from "../src/ui/themes";
-import { measureDiffSectionMetrics } from "../src/ui/lib/sectionHeights";
+import { measureDiffSectionMetrics } from "../src/ui/lib/diffSectionMetrics";
 
 const { AppHost } = await import("../src/ui/AppHost");
 const { buildSidebarEntries } = await import("../src/ui/lib/files");
diff --git a/test/ui-lib.test.ts b/test/ui-lib.test.ts
index 08b6fbe..84d3f2c 100644
--- a/test/ui-lib.test.ts
+++ b/test/ui-lib.test.ts
@@ -16,7 +16,7 @@ import {
 import { buildAppMenus } from "../src/ui/lib/appMenus";
 import { fitText, padText } from "../src/ui/lib/text";
 import { computeHunkRevealScrollTop } from "../src/ui/lib/hunkScroll";
-import { estimateDiffBodyRows, measureDiffSectionMetrics } from "../src/ui/lib/sectionHeights";
+import { estimateDiffBodyRows, measureDiffSectionMetrics } from "../src/ui/lib/diffSectionMetrics";
 import { resizeSidebarWidth } from "../src/ui/lib/sidebar";
 import { resolveTheme } from "../src/ui/themes";