feat(config): allow slash command keybinds in config

Replace Keybinds schema .strict() with .catchall() + .superRefine() to:
- Allow custom keybind keys that start with '/' (slash command names)
- Reject unknown keys that don't start with '/' with a clear error message
- Preserve validation for all predefined keybind names

Add tests for slash command keybind acceptance and rejection of invalid keys.
Regenerate SDK types to include index signature for custom keybinds.

Author: ariane-emory

packages/opencode/src/cli/cmd/tui/context/keybind.tsx

@@ -15,7 +15,7 @@ export const { use: useKeybind, provider: KeybindProvider } = createSimpleContex
     const keybinds = createMemo(() => {
       return pipe(
         sync.data.config.keybinds ?? {},
-        mapValues((value) => Keybind.parse(value)),
+        mapValues((value) => (value ? Keybind.parse(value) : [])),
       )
     })
     const [store, setStore] = createStore({

packages/opencode/src/config/config.ts

@@ -753,7 +753,110 @@ export namespace Config {
       terminal_title_toggle: z.string().optional().default("none").describe("Toggle terminal title"),
       tips_toggle: z.string().optional().default("<leader>h").describe("Toggle tips on home screen"),
     })
-    .strict()
+    .catchall(z.string().optional())
+    .superRefine((data, ctx) => {
+      // Predefined keybind keys from the schema
+      const predefinedKeys = new Set([
+        "leader",
+        "app_exit",
+        "editor_open",
+        "theme_list",
+        "sidebar_toggle",
+        "scrollbar_toggle",
+        "username_toggle",
+        "status_view",
+        "session_export",
+        "session_new",
+        "session_list",
+        "session_timeline",
+        "session_fork",
+        "session_rename",
+        "session_share",
+        "session_unshare",
+        "session_interrupt",
+        "session_compact",
+        "messages_page_up",
+        "messages_page_down",
+        "messages_half_page_up",
+        "messages_half_page_down",
+        "messages_first",
+        "messages_last",
+        "messages_next",
+        "messages_previous",
+        "messages_last_user",
+        "messages_copy",
+        "messages_undo",
+        "messages_redo",
+        "messages_toggle_conceal",
+        "tool_details",
+        "model_list",
+        "model_cycle_recent",
+        "model_cycle_recent_reverse",
+        "model_cycle_favorite",
+        "model_cycle_favorite_reverse",
+        "command_list",
+        "agent_list",
+        "agent_cycle",
+        "agent_cycle_reverse",
+        "variant_cycle",
+        "input_clear",
+        "input_paste",
+        "input_submit",
+        "input_newline",
+        "input_move_left",
+        "input_move_right",
+        "input_move_up",
+        "input_move_down",
+        "input_select_left",
+        "input_select_right",
+        "input_select_up",
+        "input_select_down",
+        "input_line_home",
+        "input_line_end",
+        "input_select_line_home",
+        "input_select_line_end",
+        "input_visual_line_home",
+        "input_visual_line_end",
+        "input_select_visual_line_home",
+        "input_select_visual_line_end",
+        "input_buffer_home",
+        "input_buffer_end",
+        "input_select_buffer_home",
+        "input_select_buffer_end",
+        "input_delete_line",
+        "input_delete_to_line_end",
+        "input_delete_to_line_start",
+        "input_backspace",
+        "input_delete",
+        "input_undo",
+        "input_redo",
+        "input_word_forward",
+        "input_word_backward",
+        "input_select_word_forward",
+        "input_select_word_backward",
+        "input_delete_word_forward",
+        "input_delete_word_backward",
+        "history_previous",
+        "history_next",
+        "session_child_cycle",
+        "session_child_cycle_reverse",
+        "session_parent",
+        "terminal_suspend",
+        "terminal_title_toggle",
+        "tips_toggle",
+      ])
+
+      for (const key of Object.keys(data)) {
+        if (!predefinedKeys.has(key) && !key.startsWith("/")) {
+          ctx.addIssue({
+            code: z.ZodIssueCode.unrecognized_keys,
+            keys: [key],
+            path: [],
+            message: `Invalid keybind key '${key}'. Custom keybinds must start with '/' (slash command names).`,
+          })
+        }
+      }
+    })
     .meta({
       ref: "KeybindsConfig",
     })

packages/opencode/test/config/config.test.ts

@@ -170,6 +170,55 @@ test("validates config schema and throws on invalid fields", async () => {
   })
 })
 
+test("accepts slash command keybinds in config", async () => {
+  await using tmp = await tmpdir({
+    init: async (dir) => {
+      await Bun.write(
+        path.join(dir, "opencode.json"),
+        JSON.stringify({
+          $schema: "https://opencode.ai/config.json",
+          keybinds: {
+            "/carry-on": "<leader>1",
+            "/integrate-branches--proxy-opus": "<leader>2",
+            "/fake_command": "<leader>3",
+          },
+        }),
+      )
+    },
+  })
+  await Instance.provide({
+    directory: tmp.path,
+    fn: async () => {
+      const config = await Config.get()
+      expect((config.keybinds as Record<string, string>)["/carry-on"]).toBe("<leader>1")
+      expect((config.keybinds as Record<string, string>)["/integrate-branches--proxy-opus"]).toBe("<leader>2")
+      expect((config.keybinds as Record<string, string>)["/fake_command"]).toBe("<leader>3")
+    },
+  })
+})
+
+test("rejects invalid keybind keys without slash prefix", async () => {
+  await using tmp = await tmpdir({
+    init: async (dir) => {
+      await Bun.write(
+        path.join(dir, "opencode.json"),
+        JSON.stringify({
+          $schema: "https://opencode.ai/config.json",
+          keybinds: {
+            another_fake_command: "<leader>3",
+          },
+        }),
+      )
+    },
+  })
+  await Instance.provide({
+    directory: tmp.path,
+    fn: async () => {
+      await expect(Config.get()).rejects.toThrow()
+    },
+  })
+})
+
 test("throws error for invalid JSON", async () => {
   await using tmp = await tmpdir({
     init: async (dir) => {

packages/sdk/js/src/v2/gen/types.gen.ts

@@ -1253,6 +1253,7 @@ export type KeybindsConfig = {
    * Toggle tips on home screen
    */
   tips_toggle?: string
+  [key: string]: string | undefined
 }
 
 /**