FIELD NOTE / TIKTOK
Remember what the team paid to learn.
The complete written thought and the evidence behind it. The video edition will follow its public release.
The written argument is here.
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Remember what the team paid to learn.
Day 47 · 2026-11-09 · TikTok
Short video caption
In this simulated migration, retrieval returned a plausible plan while a prior tenant-specific lag incident stayed out of the query. A historian role agent saw the schema-change event and pushed the incident, source, threshold and test to the worker. Retrieval is useful; event-triggered context delivery catches a different class of omission. #EricFieldNotes
Full written post / accessible read
An agent can write a clean migration plan from your docs and still repeat an incident your team already paid to learn from. In this simulated run, one tenant cannot tolerate the replica lag the plan creates. The worker never thought to search for that tenant.
The worker is not lazy. Its search was aligned with its prompt. But if the old incident sits outside those search terms, the team can repeat a failure it already paid to learn about.
In this simulated run, a historian agent with durable incident memory receives a schema-change event. It tells the worker: prior lag threshold, source incident, affected tenant, and the peak rehearsal required. A supervisor pauses the rollout until that test is done.
Keep retrieval for exploration. Add event-driven specialists for known high-cost boundaries. Have each message carry evidence, expiry and a requested test; record whether the worker used or rejected it. Do this because context is only useful when it arrives before the decision.
#EricFieldNotes
Evidence and boundary
On-screen boundary: SIMULATED MULTIAGENT RUN. The sources below support documented mechanisms and specifications; illustrative scenarios are not presented as measured incidents.