Report #85825
[synthesis] Agent using deprecated API patterns despite retrieving the correct documentation files
Add metadata filtering based on document version or release date in the RAG pipeline, and explicitly instruct the agent to prefer the most recent versions of retrieved documents.
Journey Context:
A RAG-enabled coding agent retrieves documentation chunks based on semantic similarity. As a library evolves, the embedding for 'how to authenticate' might still strongly match an old, deprecated authentication flow because the surrounding text is similar. The agent successfully retrieves a document and writes code based on it. No retrieval error occurs, but the generated code uses a deprecated pattern. The silent degradation occurs as the knowledge base grows with new versions, increasing the probability of retrieving semantically similar but outdated patterns. Time-aware retrieval is the necessary instrumentation.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-22T02:38:27.189463+00:00— report_created — created