refactor(plugin): remove metadata assertions

Guard optional plugin metadata and pane identifiers before passing them to cleanup and warning paths.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/features/team-mode/team-runtime/delete-team.ts

@@ -103,8 +103,11 @@ export async function deleteTeam(
   const removedLayout = config.tmux_visualization && tmuxMgr !== undefined && deps.canVisualize()
   if (removedLayout) {
     const memberPaneIds = runtimeState.members
-      .filter((member) => member.agentType !== "leader" && member.tmuxPaneId)
-      .map((member) => member.tmuxPaneId!)
+      .flatMap((member) => (
+        member.agentType !== "leader" && member.tmuxPaneId
+          ? [member.tmuxPaneId]
+          : []
+      ))
 
     const cleanupTarget = runtimeState.tmuxLayout
       ? {

src/plugin-handlers/command-config-handler.ts

@@ -43,8 +43,8 @@ export async function applyCommandConfig(params: {
   const includeClaudeSkills = params.pluginConfig.claude_code?.skills ?? true;
 
   const externalSkillPlugin = detectExternalSkillPlugin(params.ctx.directory);
-  if (includeClaudeSkills && externalSkillPlugin.detected) {
-    log(getSkillPluginConflictWarning(externalSkillPlugin.pluginName!));
+  if (includeClaudeSkills && externalSkillPlugin.detected && externalSkillPlugin.pluginName) {
+    log(getSkillPluginConflictWarning(externalSkillPlugin.pluginName));
   }
 
   const [

src/plugin/hooks/create-session-hooks.ts

@@ -101,8 +101,8 @@ export function createSessionHooks(args: {
   if (isHookEnabled("session-notification")) {
     const forceEnable = pluginConfig.notification?.force_enable ?? false
     const externalNotifier = detectExternalNotificationPlugin(ctx.directory)
-    if (externalNotifier.detected && !forceEnable) {
-      log(getNotificationConflictWarning(externalNotifier.pluginName!))
+    if (externalNotifier.detected && externalNotifier.pluginName && !forceEnable) {
+      log(getNotificationConflictWarning(externalNotifier.pluginName))
     } else {
       sessionNotification = safeHook("session-notification", () => createSessionNotification(ctx))
     }

src/shared/log-legacy-plugin-startup-warning.ts

@@ -16,7 +16,7 @@ export function logLegacyPluginStartupWarning(deps: LogLegacyPluginStartupWarnin
   const migrateLegacyPluginEntryFn = deps.migrateLegacyPluginEntry ?? migrateLegacyPluginEntry
 
   const result = checkForLegacyPluginEntryFn()
-  if (!result.hasLegacyEntry) {
+  if (!result.hasLegacyEntry || !result.configPath) {
     return
   }
 
@@ -34,7 +34,7 @@ export function logLegacyPluginStartupWarning(deps: LogLegacyPluginStartupWarnin
     + ` Attempting auto-migration...`,
   )
 
-  const migrated = migrateLegacyPluginEntryFn(result.configPath!)
+  const migrated = migrateLegacyPluginEntryFn(result.configPath)
   if (migrated) {
     console.warn(`[oh-my-openagent] Auto-migrated opencode.json: ${result.legacyEntries.join(", ")} -> ${suggestedEntries.join(", ")}`)
   } else {