Dan Farrelly's blog https://danfarrelly.com en-us Tue, 21 Jul 2026 00:00:00 GMT Every six months, the "right" way to build an agent changes. Here's the one layer worth owning — and how to make everything else swappable. https://danfarrelly.com/blog/your-agent-architecture-has-a-half-life/ https://danfarrelly.com/blog/your-agent-architecture-has-a-half-life/ ai agents agent architecture execution layer durable execution orchestration ai engineering Dan Farrelly Tue, 21 Jul 2026 00:00:00 GMT Everyone's asking what a loop is. The question nobody's asking is what runs the loop. Durable orchestration is the execution layer underneath — and it's the foundation of the agent loop architecture. https://danfarrelly.com/blog/agent-loop-architecture/ https://danfarrelly.com/blog/agent-loop-architecture/ ai agents agent loop durable execution orchestration agent skills ai engineering Dan Farrelly Thu, 18 Jun 2026 00:00:00 GMT Every six months, the "right" way to build an AI agent changes. How can you design for the next rewrite? https://danfarrelly.com/blog/background-agents-are-here-your-orchestration-isnt-ready/ https://danfarrelly.com/blog/background-agents-are-here-your-orchestration-isnt-ready/ ai agents background agents orchestration durable execution architecture Dan Farrelly Fri, 08 May 2026 00:00:00 GMT Every agentic system that actually ships ends up needing three delegation patterns: one that blocks, one that fires and forgets, and one that runs later. https://danfarrelly.com/blog/three-patterns-you-need-for-agentic-systems/ https://danfarrelly.com/blog/three-patterns-you-need-for-agentic-systems/ ai agents sub-agents agentic systems delegation patterns orchestration Dan Farrelly Wed, 11 Mar 2026 00:00:00 GMT Agent runtimes don't need yet another framework — they need a durable, event-driven harness that connects tools, memory, and models on production-grade infrastructure. https://danfarrelly.com/blog/your-agent-needs-a-harness-not-a-framework/ https://danfarrelly.com/blog/your-agent-needs-a-harness-not-a-framework/ ai agents agent harness agent frameworks durable execution event-driven Dan Farrelly Tue, 03 Mar 2026 00:00:00 GMT What Durable Execution is, how it works, and why it's beneficial to your system. https://danfarrelly.com/blog/principles-of-durable-execution/ https://danfarrelly.com/blog/principles-of-durable-execution/ durable execution durable workflows inngest step functions durable functions Dan Farrelly Tue, 10 Dec 2024 00:00:00 GMT Ensuring fairness and consistent performance for all users with concurrency controls. https://danfarrelly.com/blog/fixing-multi-tenant-queueing-concurrency-problems/ https://danfarrelly.com/blog/fixing-multi-tenant-queueing-concurrency-problems/ queueing multi-tenant noisy neighbor concurrency fairness distributed systems Dan Farrelly Fri, 28 Jun 2024 00:00:00 GMT Why you shouldn't directly use message queues in 2024. https://danfarrelly.com/blog/queues-are-no-longer-the-right-abstraction/ https://danfarrelly.com/blog/queues-are-no-longer-the-right-abstraction/ message queues sqs durable execution abstractions background jobs distributed systems Dan Farrelly Thu, 28 Mar 2024 00:00:00 GMT There have been a couple recent posts that I've read about the cloud skills gap including some conversations on Twitter that I think are focusing on the wrong problem. https://danfarrelly.com/blog/cloud-skills-gap-focusing-on-the-wrong-problem/ https://danfarrelly.com/blog/cloud-skills-gap-focusing-on-the-wrong-problem/ cloud cloud skills aws cloud infra gcp devops Dan Farrelly Thu, 03 Nov 2022 00:00:00 GMT Lessons learned scaling webhooks to millions of requests a day at Buffer. https://danfarrelly.com/blog/building-webhooks-that-scale/ https://danfarrelly.com/blog/building-webhooks-that-scale/ webhooks scaling buffer queues idempotency backend Dan Farrelly Wed, 27 Jul 2022 00:00:00 GMT At KubeCon 2016, I gave a talk about how we started using Kuberentes at Buffer including our learnings along the way. https://danfarrelly.com/blog/kubecon-talk-kubernetes-production-buffer/ https://danfarrelly.com/blog/kubecon-talk-kubernetes-production-buffer/ kubecon kubernetes containers buffer Dan Farrelly Sun, 20 Nov 2016 00:00:00 GMT As Buffer is well into into it’s sixth year of existence, we’ve evolved a lot as an engineering team. Now our architecture is evolving again. https://danfarrelly.com/blog/service-oriented-architecture-buffer/ https://danfarrelly.com/blog/service-oriented-architecture-buffer/ service oriented architecture SOA kubernetes buffer Dan Farrelly Tue, 18 Oct 2016 00:00:00 GMT