Harry Le ยท BlogNotes from building backends, platforms and AI agent tooling.https://nqcdan.com/enRunning coding agents for hours without babysitting: notes on harness engineeringhttps://nqcdan.com/blog/agent-harness/https://nqcdan.com/blog/agent-harness/The guards, gates, loop detectors and state files I put around a coding agent so long background jobs stay safe, and what I could and could not verify.Wed, 11 Nov 2026 00:00:00 GMTai-agentsclaude-codeharness-engineeringdeveloper-toolsChange data capture with Debezium and Kafka: what I learned running it in productionhttps://nqcdan.com/blog/cdc-debezium-kafka/https://nqcdan.com/blog/cdc-debezium-kafka/When CDC is worth it, the outbox pattern, and the traps I hit with slots, snapshots, ordering and duplicate events on PostgreSQL and SQL Server.Wed, 04 Nov 2026 00:00:00 GMTkafkadebeziumcdcevent-drivenpostgresqlBuilding an MCP server so an LLM agent can read my inboxhttps://nqcdan.com/blog/mcp-imap-server/https://nqcdan.com/blog/mcp-imap-server/How I wrapped IMAP in a small TypeScript MCP server: the tool design, where the safety line sits (drafts, never send), and what I would change.Wed, 28 Oct 2026 00:00:00 GMTmcptypescriptemailai-agents