diff --git a/packages/opencode/src/config/migrate-tui-config.ts b/packages/opencode/src/config/migrate-tui-config.ts
index a59574b8d3..2296b5ec43 100644
--- a/packages/opencode/src/config/migrate-tui-config.ts
+++ b/packages/opencode/src/config/migrate-tui-config.ts
@@ -3,7 +3,7 @@ import { type ParseError as JsoncParseError, applyEdits, modify, parse as parseJ
 import { mergeDeep, unique } from "remeda"
 import z from "zod"
 import { ConfigPaths } from "./paths"
-import { TuiInfo, TuiOptions } from "./tui-schema"
+import { TuiInfo } from "./tui-schema"
 import { Instance } from "@/project/instance"
 import { Flag } from "@/flag/flag"
 import { Log } from "@/util/log"
@@ -17,14 +17,6 @@ const TUI_SCHEMA_URL = "https://opencode.ai/tui.json"
 const LegacyTheme = TuiInfo.shape.theme.optional()
 const LegacyRecord = z.record(z.string(), z.unknown()).optional()
 
-const TuiLegacy = z
-  .object({
-    scroll_speed: TuiOptions.shape.scroll_speed.catch(undefined),
-    scroll_acceleration: TuiOptions.shape.scroll_acceleration.catch(undefined),
-    diff_style: TuiOptions.shape.diff_style.catch(undefined),
-  })
-  .strip()
-
 interface MigrateInput {
   directories: string[]
   custom?: string
@@ -103,12 +95,11 @@ async function parseLegacyFile(file: string) {
   const theme = LegacyTheme.safeParse("theme" in data ? data.theme : undefined)
   const keybinds = LegacyRecord.safeParse("keybinds" in data ? data.keybinds : undefined)
   const legacyTui = LegacyRecord.safeParse("tui" in data ? data.tui : undefined)
-  const tui = legacyTui.success && legacyTui.data ? normalizeTui(legacyTui.data) : undefined
 
   const legacy: Record<string, unknown> = {}
   if (theme.success && theme.data !== undefined) legacy.theme = theme.data
   if (keybinds.success && keybinds.data !== undefined) legacy.keybinds = keybinds.data
-  if (tui) Object.assign(legacy, tui)
+  if (legacyTui.success && legacyTui.data) Object.assign(legacy, legacyTui.data)
   if (!Object.keys(legacy).length) return
 
   return {
@@ -118,19 +109,6 @@ async function parseLegacyFile(file: string) {
   }
 }
 
-function normalizeTui(data: Record<string, unknown>) {
-  const parsed = TuiLegacy.safeParse(data)
-  if (!parsed.success) return
-  if (
-    parsed.data.scroll_speed === undefined &&
-    parsed.data.diff_style === undefined &&
-    parsed.data.scroll_acceleration === undefined
-  ) {
-    return
-  }
-  return parsed.data
-}
-
 async function backupAndStripLegacy(file: string, source: string) {
   const backup = file + ".tui-migration.bak"
   const hasBackup = await Filesystem.exists(backup)
diff --git a/packages/opencode/src/config/tui.ts b/packages/opencode/src/config/tui.ts
index f0964f63b3..6ba6036f2d 100644
--- a/packages/opencode/src/config/tui.ts
+++ b/packages/opencode/src/config/tui.ts
@@ -107,7 +107,7 @@ export namespace TuiConfig {
       }
     })()
 
-    const parsed = Info.safeParse(normalized)
+    const parsed = Info.strip().safeParse(normalized)
     if (!parsed.success) {
       log.warn("invalid tui config", { path: configFilepath, issues: parsed.error.issues })
       return {}
diff --git a/packages/opencode/test/config/tui.test.ts b/packages/opencode/test/config/tui.test.ts
index 0218cd939d..be83d38fdd 100644
--- a/packages/opencode/test/config/tui.test.ts
+++ b/packages/opencode/test/config/tui.test.ts
@@ -87,7 +87,11 @@ test("merges legacy tui keys from opencode.jsonc and opencode.json before migrat
         path.join(dir, "opencode.jsonc"),
         `{
   "theme": "from-jsonc",
-  "tui": { "scroll_speed": 2 },
+  "tui": {
+    "scroll_speed": 2,
+    "legacy_alpha": 1,
+    "legacy_nested": { "from_jsonc": true }
+  },
   "keybinds": { "app_exit": "ctrl+q" }
 }`,
       )
@@ -97,6 +101,10 @@ test("merges legacy tui keys from opencode.jsonc and opencode.json before migrat
           {
             theme: "from-json",
             keybinds: { theme_list: "ctrl+k" },
+            tui: {
+              legacy_beta: 2,
+              legacy_nested: { from_json: true },
+            },
           },
           null,
           2,
@@ -118,6 +126,9 @@ test("merges legacy tui keys from opencode.jsonc and opencode.json before migrat
       expect(JSON.parse(text)).toMatchObject({
         theme: "from-json",
         scroll_speed: 2,
+        legacy_alpha: 1,
+        legacy_beta: 2,
+        legacy_nested: { from_jsonc: true, from_json: true },
         keybinds: { app_exit: "ctrl+q", theme_list: "ctrl+k" },
       })
 
@@ -169,7 +180,7 @@ test("migrates project legacy tui keys even when global tui.json already exists"
   })
 })
 
-test("drops unknown legacy tui keys during migration", async () => {
+test("preserves unknown legacy tui keys during migration", async () => {
   await using tmp = await tmpdir({
     init: async (dir) => {
       await Bun.write(
@@ -196,7 +207,7 @@ test("drops unknown legacy tui keys during migration", async () => {
       const text = await Filesystem.readText(path.join(tmp.path, "tui.json"))
       const migrated = JSON.parse(text)
       expect(migrated.scroll_speed).toBe(2)
-      expect(migrated.foo).toBeUndefined()
+      expect(migrated.foo).toBe(1)
     },
   })
 })