https://mertsahin.ai/https://mertsahin.ai/notes/https://mertsahin.ai/notes/two-agent-team/https://mertsahin.ai/notes/long-running-agents-progress-file/https://mertsahin.ai/notes/harness-is-the-product/https://mertsahin.ai/notes/coding-agents-2024-2026/https://mertsahin.ai/notes/abap-mcp-server/