Visualizers
Learn by moving things
Interactive explainers for the ideas behind retrieval, embeddings, and agents. A formula tells you what is true; dragging a vector shows you why. Each one also appears inside the article it belongs to, and runs entirely in your browser, so drag, poke, and break it.
Ordering: same messages, wrong order, wrong answer
From: Delivery Guarantees: At-Least-Once, Exactly-Once, and Idempotency →Deposit 100 then withdraw 50 on an account that cannot go negative ends at 50. Reorder the two and the withdrawal is rejected against a zero balance, ending at 100: the same messages, a different answer. Keeping them in order prevents it.
Two events for one account that starts at 0 and may not go negative: deposit 100, then withdraw 50.
Query rewriting
From: A Field Guide to RAG →A messy, context-dependent question ('and how much does it cost?') is unsearchable on its own. Query rewriting resolves the context and produces a clear, standalone query the index can match.
On its own the follow-up is unsearchable: the index has no idea what “it” refers to.
Query expansion / multi-query
From: A Field Guide to RAG →One wording can miss documents that use different words. Multi-query fans the question into several phrasings, searches all of them in parallel, and pools the results, catching passages a single phrasing would have missed.
You start with a single wording, which may not match documents that use different words.