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AI / LLM

Tips on generative AI, LLMs, RAG and vector databases.

LLM – System prompt – Prevent contact hallucination with a registry

April 30, 2026 by Jean-Pierre Lambelet
Rolodex avec onglets alphabetiques, metaphore visuelle du registry contre les hallucinations LLM

How to prevent LLM hallucination on contact data by injecting a verified registry into the system prompt.

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Jean-Pierre Lambelet est un développeur web suisse. Ce blog rassemble ses astuces et tutoriels sur PHP, Symfony, Drupal, Docker et l'outillage de développement front-end.

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Recent Posts

  • LLM – System prompt – Prevent contact hallucination with a registry
  • PostgreSQL – How to filter on a column with uppercase letters in its name
  • Symfony – Doctrine – How to see where a sql query is executed
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