Add update_cursor.py helper, ClaudeObsidian/HarnessEngineering/LoopEngineering articles, document TrmnlTelegram hosting Cursor writes now go through helper/update_cursor.py instead of an inline heredoc, with settings.json and CLAUDE.md updated to match. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Y5Cu5eydZZcQHBWbAwhgFx