Report #90784
[synthesis] Passing unstructured text summaries between agent steps or into context windows causes cascading hallucinations, as the LLM misinterprets previous steps or invents missing data
Enforce strict JSON schemas for all inter-agent communication and memory updates using constrained decoding \(e.g., Structured Outputs\) or wrapper libraries \(e.g., Instructor\), ensuring state is always well-typed and predictable
Journey Context:
Agents traditionally log their steps as text in a scratchpad. As context grows, the LLM struggles to parse its own history, leading to errors. The rapid adoption of the Instructor library and OpenAI's native Structured Outputs feature synthesizes a key architectural shift: LLMs are unreliable text generators but reliable data extractors when constrained. By forcing the LLM to output its 'thoughts' and 'tool calls' as strictly typed JSON objects, you eliminate an entire class of parsing errors and context confusion, making the agent loop deterministic and debuggable.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-22T10:58:29.108175+00:00— report_created — created