feat(frontend): add opencode plugin types and API methods

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/api.ts

@@ -60,6 +60,7 @@ import type {
   ChannelStatusInfo,
   ChatChannelMessageLog,
   ModelProviderInfo,
+  PluginCheckSummary,
 } from "./types"
 
 export async function listConversations(params?: {
@@ -278,6 +279,26 @@ export async function acpPreflight(
   })
 }
 
+export async function opencodeListPlugins(): Promise<PluginCheckSummary> {
+  return getTransport().call("opencode_list_plugins", {})
+}
+
+export async function opencodeInstallPlugins(
+  taskId: string,
+  names?: string[] | null
+): Promise<void> {
+  return getTransport().call("opencode_install_plugins", {
+    names: names ?? null,
+    taskId,
+  })
+}
+
+export async function opencodeUninstallPlugin(
+  name: string
+): Promise<PluginCheckSummary> {
+  return getTransport().call("opencode_uninstall_plugin", { name })
+}
+
 export async function acpListAgentSkills(params: {
   agentType: AgentType
   workspacePath?: string | null

src/lib/types.ts

@@ -885,6 +885,7 @@ export type FixActionKind =
   | "redownload_binary"
   | "retry_connection"
   | "open_agents_settings"
+  | "install_opencode_plugins"
 
 export interface FixAction {
   label: string
@@ -909,6 +910,32 @@ export interface PreflightResult {
   checks: CheckItem[]
 }
 
+// ─── OpenCode Plugins ───
+
+export type PluginStatus = "installed" | "missing"
+
+export interface PluginInfo {
+  name: string
+  declared_spec: string
+  installed_version: string | null
+  status: PluginStatus
+}
+
+export interface PluginCheckSummary {
+  config_path: string
+  cache_dir: string
+  plugins: PluginInfo[]
+  has_project_config_hint: boolean
+}
+
+export type PluginInstallEventKind = "started" | "log" | "completed" | "failed"
+
+export interface PluginInstallEvent {
+  task_id: string
+  kind: PluginInstallEventKind
+  payload: string
+}
+
 // ─── Chat Channels ───
 
 export type ChannelType = "lark" | "telegram" | "weixin"