Claude Code Workflows: Deterministic Multi-Agent Orchestration

Claude Code shipped workflows recently, and the docs describe a lot of machinery: deterministic orchestration, parallel and pipeline, journaling and resume, adversarial verify patterns. I wanted to understand it rather than skim the feature list, and the way I learn a tool is to build the smallest real thing with it. So I picked a task with an obvious fan-out shape: “what happened in the Vue and Nuxt ecosystem this week.” Many independent sources to check, then a merge, then a write-up. I wrote a ~130-line workflow that spawns nine agents in parallel, each scouring a different source, collects their findings into one list, ranks them by impact, and writes a digest. It’s a throwaway, but building it taught me how the whole feature fits together. This post is what I learned. A workflow is the newest piece of Claude Code’s orchestration story. In my post on agent teams I traced the progression from subagents to teams. Workflows are the next rung, and they solve a different problem than…