When Code When LLM

Original name

Original description

Decision framework for choosing between deterministic code (regex, keyword match, AST parse, schema validation) and LLM-based processing (classification, semantic similarity, judge) for a single task. Use when you catch yourself writing a regex for a task that keeps producing false positives or negatives, or when you are about to call an LLM for something a three-line code check would handle. Covers the structural-vs-semantic axis, the false-positive test, worked examples of both directions, and the enumerate/decide split for tasks where detection is structural but resolution needs judgment.