From c2db18c59bc592d232961c4c3f69124602ce6ccc Mon Sep 17 00:00:00 2001
From: "opencode-agent[bot]"
 <219766164+opencode-agent[bot]@users.noreply.github.com>
Date: Fri, 31 Jul 2026 20:31:50 -0400
Subject: [PATCH] refactor(tui): remove unwired file selection helper (#39961)

Co-authored-by: Kit Langton <kit.langton@gmail.com>
---
 .../system/diff-viewer-file-tree-utils.ts     | 16 ---------------
 .../diff-viewer-file-tree-utils.test.ts       | 20 -------------------
 2 files changed, 36 deletions(-)

diff --git a/packages/tui/src/feature-plugins/system/diff-viewer-file-tree-utils.ts b/packages/tui/src/feature-plugins/system/diff-viewer-file-tree-utils.ts
index a41c0984618..34ded01ba33 100644
--- a/packages/tui/src/feature-plugins/system/diff-viewer-file-tree-utils.ts
+++ b/packages/tui/src/feature-plugins/system/diff-viewer-file-tree-utils.ts
@@ -141,22 +141,6 @@ export function moveFileTreeSelectionToParent(rows: readonly FileTreeRow[], sele
   return rows.findLast((item, itemIndex) => itemIndex < index && item.depth < row.depth)?.id ?? selected
 }
 
-export function moveFileTreeSelectionToFile(
-  rows: readonly FileTreeRow[],
-  selected: number | undefined,
-  offset: number,
-) {
-  const fileRows = rows.filter((row) => row.fileIndex !== undefined)
-  if (fileRows.length === 0) return undefined
-  const selectedIndex = selected === undefined ? -1 : rows.findIndex((row) => row.id === selected)
-  if (selectedIndex === -1) return offset < 0 ? fileRows[fileRows.length - 1]!.id : fileRows[0]!.id
-  const next =
-    offset < 0
-      ? fileRows.findLast((row) => rows.findIndex((item) => item.id === row.id) < selectedIndex)
-      : fileRows.find((row) => rows.findIndex((item) => item.id === row.id) > selectedIndex)
-  return next?.id ?? (offset < 0 ? fileRows[0]!.id : fileRows[fileRows.length - 1]!.id)
-}
-
 export function fileTreeFileSelection(tree: FileTree, fileIndex: number) {
   const node = tree.nodes.find((item) => item.kind === "file" && item.fileIndex === fileIndex)
   if (!node) return undefined
diff --git a/packages/tui/test/feature-plugins/diff-viewer-file-tree-utils.test.ts b/packages/tui/test/feature-plugins/diff-viewer-file-tree-utils.test.ts
index 16090774909..e53e35709d7 100644
--- a/packages/tui/test/feature-plugins/diff-viewer-file-tree-utils.test.ts
+++ b/packages/tui/test/feature-plugins/diff-viewer-file-tree-utils.test.ts
@@ -6,7 +6,6 @@ import {
   flattenFileTree,
   moveFileTreeSelection,
   moveFileTreeSelectionToFirstChild,
-  moveFileTreeSelectionToFile,
   moveFileTreeSelectionToParent,
   movePatchFileIndex,
   orderedPatchFileIndexes,
@@ -219,25 +218,6 @@ describe("diff viewer file tree utilities", () => {
     expect(moveFileTreeSelectionToParent(rows, undefined)).toBeUndefined()
   })
 
-  test("moves file selection relative to the highlighted row", () => {
-    const rows = flattenFileTree(
-      buildFileTree([{ file: "src/config/tui.ts" }, { file: "src/session/index.ts" }, { file: "README.md" }]),
-    )
-    const config = rows.find((row) => row.kind === "directory" && row.name === "config")!
-    const session = rows.find((row) => row.kind === "directory" && row.name === "session")!
-    const tui = rows.find((row) => row.name === "tui.ts")!
-    const index = rows.find((row) => row.name === "index.ts")!
-    const readme = rows.find((row) => row.name === "README.md")!
-
-    expect(moveFileTreeSelectionToFile(rows, undefined, 1)).toBe(tui.id)
-    expect(moveFileTreeSelectionToFile(rows, undefined, -1)).toBe(readme.id)
-    expect(moveFileTreeSelectionToFile(rows, config.id, 1)).toBe(tui.id)
-    expect(moveFileTreeSelectionToFile(rows, session.id, -1)).toBe(tui.id)
-    expect(moveFileTreeSelectionToFile(rows, tui.id, 1)).toBe(index.id)
-    expect(moveFileTreeSelectionToFile(rows, index.id, -1)).toBe(tui.id)
-    expect(moveFileTreeSelectionToFile(rows, readme.id, 1)).toBe(readme.id)
-  })
-
   test("selects a file tree node and expands its parents for a patch file", () => {
     const tree = buildFileTree([{ file: "src/config/tui.ts" }, { file: "src/session/index.ts" }, { file: "README.md" }])
     const selection = fileTreeFileSelection(tree, 1)