Math content may say its source is in scienting-math/1's canonical TeX (form, in no hash); derived/math.jsonl holds papermath's tree, symbols and issues, and the validator now checks derived files. A symbol annotation names its symbol by key; lode claim references use lode's tag and pin syntax. The zip reader refuses entries zipfile cannot read, and checkpoint lines end in LF only. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017R7sgDNvUGWY2zFPCq2JH6