diff --git a/packages/tui/src/routes/session/index.tsx b/packages/tui/src/routes/session/index.tsx
index 61abe4ab..bb40dc20 100644
--- a/packages/tui/src/routes/session/index.tsx
+++ b/packages/tui/src/routes/session/index.tsx
@@ -959,14 +959,13 @@ export function Session() {
 
           const defaultFilename = `session-${sessionData.id.slice(0, 8)}.md`
 
-          const options = await DialogExportOptions.show(
-            dialog,
-            defaultFilename,
-            showThinking(),
-            showDetails(),
-            showAssistantMetadata(),
-            false,
-          )
+          const options = await DialogExportOptions.show(dialog, {
+            filename: defaultFilename,
+            thinking: showThinking(),
+            toolDetails: showDetails(),
+            assistantMetadata: showAssistantMetadata(),
+            openWithoutSaving: false,
+          })
 
           if (options === null) return
 
diff --git a/packages/tui/src/ui/dialog-export-options.tsx b/packages/tui/src/ui/dialog-export-options.tsx
index f80f21a5..102f8c52 100644
--- a/packages/tui/src/ui/dialog-export-options.tsx
+++ b/packages/tui/src/ui/dialog-export-options.tsx
@@ -187,29 +187,24 @@ export function DialogExportOptions(props: DialogExportOptionsProps) {
   )
 }
 
-DialogExportOptions.show = (
-  dialog: DialogContext,
-  defaultFilename: string,
-  defaultThinking: boolean,
-  defaultToolDetails: boolean,
-  defaultAssistantMetadata: boolean,
-  defaultOpenWithoutSaving: boolean,
-) => {
-  return new Promise<{
-    filename: string
-    thinking: boolean
-    toolDetails: boolean
-    assistantMetadata: boolean
-    openWithoutSaving: boolean
-  } | null>((resolve) => {
+export type DialogExportOptionsResult = {
+  filename: string
+  thinking: boolean
+  toolDetails: boolean
+  assistantMetadata: boolean
+  openWithoutSaving: boolean
+}
+
+DialogExportOptions.show = (dialog: DialogContext, defaults: DialogExportOptionsResult) => {
+  return new Promise<DialogExportOptionsResult | null>((resolve) => {
     dialog.replace(
       () => (
         <DialogExportOptions
-          defaultFilename={defaultFilename}
-          defaultThinking={defaultThinking}
-          defaultToolDetails={defaultToolDetails}
-          defaultAssistantMetadata={defaultAssistantMetadata}
-          defaultOpenWithoutSaving={defaultOpenWithoutSaving}
+          defaultFilename={defaults.filename}
+          defaultThinking={defaults.thinking}
+          defaultToolDetails={defaults.toolDetails}
+          defaultAssistantMetadata={defaults.assistantMetadata}
+          defaultOpenWithoutSaving={defaults.openWithoutSaving}
           onConfirm={(options) => resolve(options)}
           onCancel={() => resolve(null)}
         />
diff --git a/packages/tui/test/cli/tui/dialog-export-options.test.tsx b/packages/tui/test/cli/tui/dialog-export-options.test.tsx
new file mode 100644
index 00000000..d7ca91b9
--- /dev/null
+++ b/packages/tui/test/cli/tui/dialog-export-options.test.tsx
@@ -0,0 +1,248 @@
+/** @jsxImportSource @opentui/solid */
+import { TextareaRenderable } from "@opentui/core"
+import { createDefaultOpenTuiKeymap } from "@opentui/keymap/opentui"
+import { testRender, useRenderer } from "@opentui/solid"
+import { expect, test } from "bun:test"
+import { mkdir } from "node:fs/promises"
+import path from "node:path"
+import { onCleanup, onMount } from "solid-js"
+import { tmpdir } from "../../fixture/fixture"
+import { createTuiResolvedConfig } from "../../fixture/tui-runtime"
+import { TestTuiContexts } from "../../fixture/tui-environment"
+import type { DialogExportOptionsResult } from "../../../src/ui/dialog-export-options"
+
+async function wait(fn: () => boolean, timeout = 2000) {
+  const start = Date.now()
+  while (!fn()) {
+    if (Date.now() - start > timeout) throw new Error("timed out waiting for condition")
+    await Bun.sleep(10)
+  }
+}
+
+function findTextPosition<F extends { lines: { spans: { text: string; width: number }[] }[] }>(
+  frame: F,
+  text: string,
+) {
+  for (let y = 0; y < frame.lines.length; y++) {
+    let x = 0
+    for (const span of frame.lines[y]!.spans) {
+      if (span.text.includes(text)) return { x, y }
+      x += span.width
+    }
+  }
+  throw new Error(`text not found in captured frame: ${text}`)
+}
+
+async function mountExportOptions(input: { root: string; defaults: DialogExportOptionsResult }) {
+  const state = path.join(input.root, "state")
+  await mkdir(state, { recursive: true })
+  await Bun.write(path.join(state, "kv.json"), "{}")
+
+  const [
+    { DialogProvider, useDialog },
+    { DialogExportOptions },
+    { KVProvider },
+    { ThemeProvider },
+    { TuiConfigProvider },
+    { ToastProvider },
+    { OpencodeKeymapProvider, registerOpencodeKeymap },
+  ] = await Promise.all([
+    import("../../../src/ui/dialog"),
+    import("../../../src/ui/dialog-export-options"),
+    import("../../../src/context/kv"),
+    import("../../../src/context/theme"),
+    import("../../../src/config"),
+    import("../../../src/ui/toast"),
+    import("../../../src/keymap"),
+  ])
+
+  let result: Promise<DialogExportOptionsResult | null> | undefined
+
+  function Body() {
+    const dialog = useDialog()
+    onMount(() => {
+      result = DialogExportOptions.show(dialog, input.defaults)
+    })
+    return <box />
+  }
+
+  function Harness() {
+    const renderer = useRenderer()
+    const keymap = createDefaultOpenTuiKeymap(renderer)
+    const resolvedConfig = createTuiResolvedConfig({ leader_timeout: 1000 })
+    const off = registerOpencodeKeymap(keymap, renderer, resolvedConfig)
+    onCleanup(off)
+
+    return (
+      <TestTuiContexts
+        directory={input.root}
+        paths={{
+          home: input.root,
+          state,
+          worktree: input.root,
+        }}
+      >
+        <OpencodeKeymapProvider keymap={keymap}>
+          <TuiConfigProvider config={resolvedConfig}>
+            <KVProvider>
+              <ThemeProvider mode="dark">
+                <ToastProvider>
+                  <DialogProvider>
+                    <Body />
+                  </DialogProvider>
+                </ToastProvider>
+              </ThemeProvider>
+            </KVProvider>
+          </TuiConfigProvider>
+        </OpencodeKeymapProvider>
+      </TestTuiContexts>
+    )
+  }
+
+  const app = await testRender(() => <Harness />, { kittyKeyboard: true })
+  await wait(() => app.renderer.currentFocusedEditor instanceof TextareaRenderable)
+
+  return {
+    app,
+    get result() {
+      if (!result) throw new Error("DialogExportOptions.show was not called")
+      return result
+    },
+    async cleanup() {
+      app.renderer.destroy()
+    },
+  }
+}
+
+test("DialogExportOptions.show renders the given defaults and resolves them unchanged on confirm", async () => {
+  await using tmp = await tmpdir()
+  const defaults: DialogExportOptionsResult = {
+    filename: "session-abc123.md",
+    thinking: true,
+    toolDetails: false,
+    assistantMetadata: true,
+    openWithoutSaving: false,
+  }
+
+  const dialog = await mountExportOptions({ root: tmp.path, defaults })
+  try {
+    const textarea = dialog.app.renderer.currentFocusedEditor
+    if (!(textarea instanceof TextareaRenderable)) throw new Error("expected focused filename textarea")
+    expect(textarea.plainText).toBe(defaults.filename)
+
+    dialog.app.mockInput.pressEnter()
+
+    await expect(dialog.result).resolves.toEqual(defaults)
+  } finally {
+    await dialog.cleanup()
+  }
+})
+
+test("DialogExportOptions.show resolves null when the dialog is dismissed", async () => {
+  await using tmp = await tmpdir()
+  const defaults: DialogExportOptionsResult = {
+    filename: "session-xyz789.md",
+    thinking: false,
+    toolDetails: true,
+    assistantMetadata: false,
+    openWithoutSaving: true,
+  }
+
+  const dialog = await mountExportOptions({ root: tmp.path, defaults })
+  try {
+    const textarea = dialog.app.renderer.currentFocusedEditor
+    if (!(textarea instanceof TextareaRenderable)) throw new Error("expected focused filename textarea")
+    expect(textarea.plainText).toBe(defaults.filename)
+
+    await dialog.app.flush()
+    const frame = dialog.app.captureCharFrame()
+    expect(frame.match(/\[x\]/g)?.length).toBe(2)
+    expect(frame.match(/\[ \]/g)?.length).toBe(2)
+
+    dialog.app.mockInput.pressEscape()
+
+    await expect(dialog.result).resolves.toBeNull()
+  } finally {
+    await dialog.cleanup()
+  }
+})
+
+test("DialogExportOptions.show lets tab cycle options and space toggle each one", async () => {
+  await using tmp = await tmpdir()
+  const defaults: DialogExportOptionsResult = {
+    filename: "session-toggle-me.md",
+    thinking: false,
+    toolDetails: false,
+    assistantMetadata: false,
+    openWithoutSaving: false,
+  }
+
+  const dialog = await mountExportOptions({ root: tmp.path, defaults })
+  try {
+    const textarea = dialog.app.renderer.currentFocusedEditor
+    if (!(textarea instanceof TextareaRenderable)) throw new Error("expected focused filename textarea")
+
+    // Cycle filename -> thinking -> toolDetails -> assistantMetadata -> openWithoutSaving,
+    // toggling each option on with space, then tab once more to wrap back to filename.
+    dialog.app.mockInput.pressTab()
+    dialog.app.mockInput.pressKey(" ")
+    dialog.app.mockInput.pressTab()
+    dialog.app.mockInput.pressKey(" ")
+    dialog.app.mockInput.pressTab()
+    dialog.app.mockInput.pressKey(" ")
+    dialog.app.mockInput.pressTab()
+    dialog.app.mockInput.pressKey(" ")
+    dialog.app.mockInput.pressTab()
+
+    await dialog.app.flush()
+    const frame = dialog.app.captureCharFrame()
+    expect(frame.match(/\[x\]/g)?.length).toBe(4)
+    expect(frame.match(/\[ \]/g)).toBeNull()
+
+    dialog.app.mockInput.pressEnter()
+
+    await expect(dialog.result).resolves.toEqual({
+      filename: defaults.filename,
+      thinking: true,
+      toolDetails: true,
+      assistantMetadata: true,
+      openWithoutSaving: true,
+    })
+  } finally {
+    await dialog.cleanup()
+  }
+})
+
+test("DialogExportOptions.show lets the mouse select each option and close the dialog", async () => {
+  await using tmp = await tmpdir()
+  const defaults: DialogExportOptionsResult = {
+    filename: "session-mouse.md",
+    thinking: false,
+    toolDetails: false,
+    assistantMetadata: false,
+    openWithoutSaving: false,
+  }
+
+  const dialog = await mountExportOptions({ root: tmp.path, defaults })
+  try {
+    const textarea = dialog.app.renderer.currentFocusedEditor
+    if (!(textarea instanceof TextareaRenderable)) throw new Error("expected focused filename textarea")
+
+    await dialog.app.flush()
+    for (const label of ["Include thinking", "Include tool details", "Include assistant metadata", "Open without saving"]) {
+      const { x, y } = findTextPosition(dialog.app.captureSpans(), label)
+      await dialog.app.mockMouse.click(x, y)
+      await dialog.app.flush()
+    }
+
+    const frame = dialog.app.captureCharFrame()
+    expect(frame.match(/\[x\]/g)).toBeNull()
+
+    const { x, y } = findTextPosition(dialog.app.captureSpans(), "esc")
+    await dialog.app.mockMouse.click(x, y)
+
+    await expect(dialog.result).resolves.toBeNull()
+  } finally {
+    await dialog.cleanup()
+  }
+})
diff --git a/turbo.json b/turbo.json
index f59711fa..7f458c20 100644
--- a/turbo.json
+++ b/turbo.json
@@ -42,6 +42,10 @@
     "@opencode-ai/session-ui#test": {
       "dependsOn": ["^build"],
       "outputs": []
+    },
+    "@opencode-ai/tui#test": {
+      "dependsOn": ["^build"],
+      "outputs": []
     }
   }
 }