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Lexical search works without a model. Hybrid retrieval and Brave discovery are marked unavailable until configured through the private gateway.
Retrieval-augmented generation is useful only when users can inspect what was retrieved and understand what the model added. A beginner can start with a deterministic cited answer card before using any model. Use Ask AI ...
lessonBuild a Word CounterPython Fundamentals for Useful Small ToolsA word counter is small but real: it accepts a path, reads text, splits on whitespace, counts the words, and reports a clear error when the file is missing. Explain how you would turn the example into a command that acce...
lessonEmbeddings and RetrievalAI and Local Model SystemsEmbeddings turn text into vectors that can find semantically related passages. They are useful only when every chunk retains source, license, version and deletion policy. Write two queries that should retrieve the same l...
lessonSimple Retrieval for Source FindingLocal AI, Evidence Search, and Introductory RAGRetrieval starts with finding candidate passages. Lexical search matches words directly. Hybrid retrieval can add embeddings and reranking, but access control and source review still matter. Search this site for read_tex...
lessonTest the Word Counter ToolPython Fundamentals for Useful Small ToolsTesting turns a script into a dependable tool. Put the count logic in a function, test that function with known text, then keep the command-line wrapper thin. Write one test case for empty text and one for three words. d...
lessonDataset Card With ProvenanceOpen Data Civic LabA dataset card is the memory of why a dataset was admitted. It records what the data is, who published it, how it was transformed, where it is stored, and which uses are allowed or blocked. Create a dataset-card outline ...
lessonMath Reference HabitsMathematics and Data FoundationsA strong learner does not memorize every formula first. They learn how to find trustworthy definitions, identify notation, and keep a source trail so a calculation can be reviewed later. Find one math definition, write t...
lessonNumbers, Units, and ClaimsMathematics and Data FoundationsUseful math starts by asking what a number measures, which unit it uses, and what comparison is being made. A count, rate, percentage, median and average can all tell different stories about the same situation. Choose a ...