Niym Academy — teardowns of AI/RAG failures

Niym Academy — teardowns of AI/RAG failuresMini-courses that dissect one real failure in an AI/RAG system and show how a senior engineer diagnoses and fixes it.https://academy.niym.ai/You scaled the embedding model. Search got worse.https://academy.niym.ai/courses/bigger-embeddings-worse-search/https://academy.niym.ai/courses/bigger-embeddings-worse-search/You doubled the embedding dimension and recall went down, not up.Thu, 25 Jun 2026 00:00:00 GMTvector-modelsvector-modelsembeddingsnormalizationretrievalscalingYour report generator invents a number — with a citationhttps://academy.niym.ai/courses/report-fabricated-citation/https://academy.niym.ai/courses/report-fabricated-citation/An authoritative-looking figure, complete with a footnote, that exists in no source.Wed, 24 Jun 2026 00:00:00 GMTdoc-generationdoc-generationgroundingcitationshallucinationattributionYour evals are all green and your users are leavinghttps://academy.niym.ai/courses/evals-green-users-leaving/https://academy.niym.ai/courses/evals-green-users-leaving/Every metric passes in CI. Production satisfaction is quietly cratering.Tue, 23 Jun 2026 00:00:00 GMTevalsevalsoffline-online-gapmetricscapstoneYour research agent loops on the same tool until it times outhttps://academy.niym.ai/courses/agent-tool-loop/https://academy.niym.ai/courses/agent-tool-loop/Given a simple task, the agent calls search() thirty times and never returns.Mon, 22 Jun 2026 00:00:00 GMTagentsagentstool-useloopscontrol-flowYour critic agent rubber-stamps the planner's hallucinationhttps://academy.niym.ai/courses/critic-rubber-stamp/https://academy.niym.ai/courses/critic-rubber-stamp/The critic was supposed to catch errors. It congratulates the planner instead.Mon, 22 Jun 2026 00:00:00 GMTmulti-agentmulti-agentcriticverificationsycophancyYour RAG says “I don’t know” for a question the docs answerhttps://academy.niym.ai/courses/retrieval-miss-acronym-expansion/https://academy.niym.ai/courses/retrieval-miss-acronym-expansion/The correct passage is sitting in the index, but it never reaches the model.Sat, 20 Jun 2026 00:00:00 GMTragacronymsembedding-mismatchrecallvocabulary-gap