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The article shares production learnings for reliably generating structured JSON output from LLMs, covering methods like JSON mode, schema validation, and retry loops, achieving 99.5% validity.
Two different multi-agent system teams experienced the same silent failure caused by agents writing to the same key in different formats, leading to phantom corruption. The article discusses solutions including schema validation, read-after-write validation, and introducing an 'unconfirmed' state for unverifiable actions.