dsh-deepseek-cost

Configuration

The price book lives at the top of lib/index.js (FLASH_TIERS, PRO_TIERS, PRICE_BOOK, OFFICIAL_PROVIDERS). Add a tier for a new model id, or a new { from, ... } entry when DeepSeek changes rates. stateVersion must be bumped whenever the fold's meaning changes, so persisted projection checkpoints are discarded instead of forward-applied — it is at 2, the version that added the per-turn ledger; a version-1 checkpoint also fails the state schema, so it is replayed from the session log either way.