feat: support custom ACP agents

apps/desktop/src/bridge.ts

@@ -211,6 +211,7 @@ export async function syncDeviceDataNow(): Promise<DeviceSyncStatus> {
 export interface ProviderInfo {
   id: string;
   display_name: string;
+  custom: boolean;
   available: boolean;
   enabled: boolean;
   needs_node: boolean;
@@ -237,6 +238,14 @@ export interface ProviderRuntimeConfiguration extends ProviderRuntimeOverride {
   effective_args: string[];
 }
 
+export interface CustomProviderConfiguration {
+  id: string;
+  display_name: string;
+  command: string;
+  args: string[];
+  forwarded_environment: string[];
+}
+
 export interface ProviderManagementInfo {
   installed: boolean;
   version: string | null;
@@ -336,9 +345,10 @@ function normalizeBrowserUseSettings(
 
 type ProviderInfoWire = Omit<
   ProviderInfo,
-  "capabilities" | "enabled" | "management" | "configuration"
+  "capabilities" | "custom" | "enabled" | "management" | "configuration"
 > & {
   capabilities?: ProviderCapability[] | null;
+  custom?: boolean | null;
   enabled?: boolean | null;
   management?: ProviderManagementInfo | null;
   configuration?: ProviderRuntimeConfiguration | null;
@@ -370,6 +380,7 @@ export function normalizeProviderInfo(
 ): ProviderInfo {
   return {
     ...provider,
+    custom: provider.custom ?? false,
     enabled: provider.enabled ?? true,
     capabilities: provider.capabilities ?? [],
     configuration:
@@ -1769,6 +1780,7 @@ const fallbackProvider = (
 ): ProviderInfo => ({
   id,
   display_name,
+  custom: false,
   available: false,
   enabled: true,
   needs_node,
@@ -1937,6 +1949,24 @@ export async function configureProvider(
   return providers.map(normalizeProviderInfo);
 }
 
+export async function registerCustomProvider(
+  configuration: CustomProviderConfiguration
+): Promise<void> {
+  if (!inDesktop)
+    throw new Error(
+      "Custom provider registration is available in the C2 desktop app"
+    );
+  await call<boolean>("providers.register", { configuration });
+}
+
+export async function removeCustomProvider(provider: string): Promise<void> {
+  if (!inDesktop)
+    throw new Error(
+      "Custom provider removal is available in the C2 desktop app"
+    );
+  await call<boolean>("providers.remove", { provider });
+}
+
 export async function installProvider(
   provider: string
 ): Promise<ProviderInfo[]> {

apps/desktop/src/i18n/strings.ts

@@ -1421,7 +1421,26 @@ export const en = {
   "settings.providers": "Providers",
   "settings.restoreDefaults": "Restore defaults",
   "settings.providersHint":
-    "Enable providers for new sessions, install their local runtimes, and keep installed versions current.",
+    "Enable providers for new sessions, manage built-in runtimes, or add any local Agent that speaks ACP over stdio.",
+  "settings.customProviderAddAction": "Add ACP Agent",
+  "settings.customProviderTitle": "Custom ACP Agent",
+  "settings.customProviderHint":
+    "C2 launches this local command directly and uses the same ACP session and permission flow as built-in providers.",
+  "settings.customProviderId": "Agent ID",
+  "settings.customProviderIdHint":
+    "Starts with a lowercase letter; use lowercase letters, numbers, dots, dashes, or underscores.",
+  "settings.customProviderCommandHint":
+    "Executable or absolute path. The command must speak ACP over stdin and stdout; shell expressions are not evaluated.",
+  "settings.customProviderArgumentsHint":
+    "Optional; one exact launch argument per line.",
+  "settings.customProviderAdd": "Add Agent",
+  "settings.customProviderAdding": "Adding…",
+  "settings.customProviderCancel": "Cancel",
+  "settings.customProviderAdded": "Added {provider} for new sessions.",
+  "settings.customProviderRemove": "Remove Agent",
+  "settings.customProviderRemoveConfirm":
+    "Remove {provider} from C2? Existing sessions and provider-owned files will not be deleted.",
+  "settings.customProviderRemoved": "Removed {provider} from C2.",
   "settings.providerChecked": "Checked just now",
   "settings.providerChecking": "Checking…",
   "settings.providerRefresh": "Refresh",
@@ -4294,7 +4313,25 @@ export const zhCN: Record<StringKey, string> = {
   "settings.providers": "供应商",
   "settings.restoreDefaults": "恢复默认",
   "settings.providersHint":
-    "管理新会话可用的 Provider，安装本地运行时并保持版本更新。",
+    "管理新会话可用的 Provider、内置运行时，或添加任何通过 stdio 支持 ACP 的本地 Agent。",
+  "settings.customProviderAddAction": "添加 ACP Agent",
+  "settings.customProviderTitle": "自定义 ACP Agent",
+  "settings.customProviderHint":
+    "C2 会直接启动这个本地命令，并复用与内置 Provider 相同的 ACP 会话和权限流程。",
+  "settings.customProviderId": "Agent ID",
+  "settings.customProviderIdHint":
+    "以小写字母开头；仅使用小写字母、数字、点、短横线或下划线。",
+  "settings.customProviderCommandHint":
+    "填写可执行程序名或绝对路径。命令必须通过 stdin/stdout 使用 ACP；不会执行 shell 表达式。",
+  "settings.customProviderArgumentsHint": "可选；每行填写一个完整的启动参数。",
+  "settings.customProviderAdd": "添加 Agent",
+  "settings.customProviderAdding": "正在添加…",
+  "settings.customProviderCancel": "取消",
+  "settings.customProviderAdded": "已为新会话添加 {provider}。",
+  "settings.customProviderRemove": "移除 Agent",
+  "settings.customProviderRemoveConfirm":
+    "从 C2 中移除 {provider}？已有会话和 Agent 自己的文件不会被删除。",
+  "settings.customProviderRemoved": "已从 C2 移除 {provider}。",
   "settings.providerChecked": "刚刚检查",
   "settings.providerChecking": "正在检查…",
   "settings.providerRefresh": "刷新",