perf(git): reuse pinned OIDs for SSH file diffs

src/main/runtime/orca-runtime-git-branch-diff.test.ts

@@ -0,0 +1,69 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import type { GlobalSettings } from '../../shared/types'
+import { RuntimeGitCommands, type ResolvedRuntimeGitWorktree } from './orca-runtime-git'
+
+const getSshGitProviderMock = vi.hoisted(() => vi.fn())
+
+vi.mock('../providers/ssh-git-dispatch', () => ({
+  getSshGitProvider: getSshGitProviderMock
+}))
+
+function makeWorktree(path: string): ResolvedRuntimeGitWorktree {
+  const worktree = {
+    id: 'wt-1',
+    repoId: 'repo-1',
+    path,
+    linkedIssue: null,
+    git: {
+      path,
+      branch: 'main',
+      isBare: false,
+      isMainWorktree: false,
+      head: 'a'.repeat(40)
+    }
+  } satisfies Partial<ResolvedRuntimeGitWorktree>
+  return worktree as unknown as ResolvedRuntimeGitWorktree
+}
+
+describe('RuntimeGitCommands branch diff', () => {
+  beforeEach(() => {
+    getSshGitProviderMock.mockReset()
+  })
+
+  it('forwards the pinned head through normalized nested SSH paths', async () => {
+    const mergeBase = 'a'.repeat(40)
+    const headOid = 'b'.repeat(40)
+    const result = {
+      kind: 'text',
+      originalContent: 'left',
+      modifiedContent: 'right',
+      originalIsBinary: false,
+      modifiedIsBinary: false
+    }
+    const provider = { getBranchDiff: vi.fn().mockResolvedValue([result]) }
+    getSshGitProviderMock.mockReturnValue(provider)
+    const commands = new RuntimeGitCommands({
+      resolveRuntimeGitTarget: async () => ({
+        worktree: makeWorktree('/remote/repo'),
+        connectionId: 'conn-1'
+      }),
+      getRuntimeSettings: () => ({}) as GlobalSettings
+    })
+
+    await expect(
+      commands.getRuntimeGitBranchDiff(
+        'id:wt-1',
+        { mergeBase, headOid },
+        'src\\file.ts',
+        'src\\old-file.ts'
+      )
+    ).resolves.toEqual(result)
+
+    expect(provider.getBranchDiff).toHaveBeenCalledWith('/remote/repo', mergeBase, {
+      includePatch: true,
+      headOid,
+      filePath: 'src/file.ts',
+      oldPath: 'src/old-file.ts'
+    })
+  })
+})