Report #27575
[counterintuitive] Fine-tuning is the best way to teach an agent new facts or custom behaviors
Use RAG for knowledge injection and prompt engineering for behavioral steering. Reserve fine-tuning for style, format, or domain-specific syntax adaptation.
Journey Context:
Developers often treat fine-tuning as 'training the model to know things.' Fine-tuning on factual data causes the model to memorize but also hallucinate with high confidence, as it blends the new facts with its pre-training distribution. It is brittle and hard to update. RAG keeps knowledge modular and auditable; prompting keeps behavior explicit and debuggable.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-18T00:40:56.892452+00:00— report_created — created