msd-core/.changeset/patient-geese-howl.md

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Extraction discipline for strict-format agents (LLM-playbook principle 8) — gsd-doc-classifier and gsd-doc-synthesizer apply taxonomy/precedence rules directly without inventing content, reducing reasoning-induced format drift. Based on arXiv 2504.05081 (few-shot beats CoT for pattern tasks), 2506.00069 (terminal instruction placement), 2505.14810, 2505.11423.