Function loadOrCreateSessionById

extensions/cli/src/session.ts:520–531

(
  sessionId: string,
  history: ChatHistoryItem[] = [],
)

 * preserve chat history across restarts for the same storage/agent id.
 */
export function loadOrCreateSessionById(
  sessionId: string,
  history: ChatHistoryItem[] = [],
): Session {
  const existing = loadSessionById(sessionId);
  if (existing) {
    SessionManager.getInstance().setSession(existing);
    return existing;
  }

  return createSession(history, sessionId);
}

/**
 * Update the current session's history