Fanout, Not Direct Calls: One Write, Many Readers for Production Agents
blaizedsouza · x · 2026-09-12
A developer shares a production agent architecture pattern: instead of an agent directly calling every downstream system after a run, publish one canonical result event and let consumers take their copy.
Fanout cheatsheet:
- Publish one canonical result event
- Let CRM, notify, and analytics consume it
- Keep offsets per consumer
- Isolate slow consumers
- Don't put fanout inside the prompt
- Measure lag per consumer
Core principle: one write, many readers. If your agent makes five notify calls after success, you wanted a message bus.
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