https://mertsahin.ai/ Short, practical notes on coding agents, harnesses and MCP: what changed over the last two years and what you can use today.en-UShttps://mertsahin.ai/notes/two-agent-team/https://mertsahin.ai/notes/two-agent-team/ Sun, 04 Oct 2026 12:00:00 +0000One agent specifies and reviews, the other builds and integrates. Eight failures from real delivery work, and the rule each one left behind.https://mertsahin.ai/notes/long-running-agents-progress-file/https://mertsahin.ai/notes/long-running-agents-progress-file/ Sun, 04 Oct 2026 12:00:00 +0000The day-long agent runs that worked kept their state in files and git; here is a progress file, a feature list and the rules that go with them.https://mertsahin.ai/notes/harness-is-the-product/https://mertsahin.ai/notes/harness-is-the-product/ Sun, 04 Oct 2026 12:00:00 +0000Anthropic traced a 2026 drop in Claude Code quality to three harness changes, not the model; here is how to version, pin and test harness config like code.https://mertsahin.ai/notes/coding-agents-2024-2026/https://mertsahin.ai/notes/coding-agents-2024-2026/ Sun, 04 Oct 2026 12:00:00 +0000Twenty dated events from two years of coding agents, grouped into protocols, harness, permissions and measurement, each linked to its primary source.https://mertsahin.ai/notes/abap-mcp-server/https://mertsahin.ai/notes/abap-mcp-server/ Sun, 04 Oct 2026 12:00:00 +0000SAP's ADT MCP server gives any coding agent create, activate, ATC and transport tools. Here is how I would tier them before letting an agent near a shared system.