The Agent Development Life Cycle — Zack Reneau-Wedeen, Sierra
Apr 11, 2025 · 18:40
Zack Reneau-Wedeen from Sierra explains the company's Agent Development Lifecycle for building reliable, testable AI agents at scale for brands like Chubbys and SiriusXM. He contrasts LLMs' nondeterministic, slow nature with traditional software, calling them a 'foundation of Jello.' Sierra treats every agent as a product, using an experience manager to review conversations, file issues, create tests, and release improvements—growing from hundreds of thousands of requests for Chubbys to tens of millions for larger customers. The lifecycle spans quality assurance, testing, and deployment, with reasoning models acting as a force multiplier. Voice agents launched generally in October 2024, handling calls with the same underlying platform, enabling responsive design across channels.
