diff --git a/packages/opencode/test/config/tui.test.ts b/packages/opencode/test/config/tui.test.ts
index 3050467a42f1..0c96267a2daf 100644
--- a/packages/opencode/test/config/tui.test.ts
+++ b/packages/opencode/test/config/tui.test.ts
@@ -472,6 +472,7 @@ it.instance("resolves keybind lookup from canonical keybinds", () =>
         keybinds: {
           leader: { key: { name: "g", ctrl: true } },
           command_list: "alt+p",
+          diff_open: "ctrl+j",
           which_key_toggle: "alt+k",
           editor_open: "ctrl+e",
           "prompt.autocomplete.next": "ctrl+j",
@@ -487,6 +488,7 @@ it.instance("resolves keybind lookup from canonical keybinds", () =>
       expect(config.keybinds.get("leader")?.[0]?.key).toEqual({ name: "g", ctrl: true })
       expect(config.leader_timeout).toBe(1234)
       expect(config.keybinds.get("command.palette.show")?.[0]?.key).toBe("alt+p")
+      expect(config.keybinds.get("diff.open")?.[0]?.key).toBe("ctrl+j")
       expect(config.keybinds.get("session.new")?.[0]?.key).toBe("<leader>n")
       expect(config.keybinds.get("which-key.toggle")?.[0]?.key).toBe("alt+k")
       expect(config.keybinds.get("which-key.layout.toggle")?.[0]?.key).toBe("ctrl+alt+shift+k")
diff --git a/packages/tui/src/app.tsx b/packages/tui/src/app.tsx
index 39aa35993f76..57b99c45ce3a 100644
--- a/packages/tui/src/app.tsx
+++ b/packages/tui/src/app.tsx
@@ -119,6 +119,7 @@ const appBindingCommands = [
   "theme.mode.lock",
   "help.show",
   "docs.open",
+  "diff.open",
   "workspace.list",
   "app.debug",
   "app.console",
diff --git a/packages/tui/src/config/keybind.ts b/packages/tui/src/config/keybind.ts
index 0028b610f2a3..b0f39ff12f9c 100644
--- a/packages/tui/src/config/keybind.ts
+++ b/packages/tui/src/config/keybind.ts
@@ -57,6 +57,7 @@ export const Definitions = {
   command_list: keybind("ctrl+p", "List available commands"),
   help_show: keybind("none", "Open help dialog"),
   docs_open: keybind("none", "Open documentation"),
+  diff_open: keybind("none", "Open diff viewer"),
   diff_close: keybind("escape,q", "Close diff viewer"),
   diff_toggle: keybind("enter,space", "Toggle diff viewer item"),
   diff_expand: keybind("right", "Expand diff viewer item"),
@@ -263,6 +264,7 @@ export const CommandMap = {
   command_list: "command.palette.show",
   help_show: "help.show",
   docs_open: "docs.open",
+  diff_open: "diff.open",
   diff_close: "diff.close",
   diff_toggle: "diff.toggle",
   diff_expand: "diff.expand",