dsh-usage-cost

When you hammer DeepSeek models all day through DeepSeek Harness, the token counters at the bottom scroll by fast, but nobody tells you what it actually cost. dsh-usage-cost fills that gap: it appends a running cost figure with a peak/off-peak split right next to the token stats in the status bar, and adds a global dashboard in Settings that breaks down every historical session by model and time-of-day.

The implementation is deliberately minimal: a single session projection unit that folds over the existing event log in O(1) per event, so state survives restarts and cold reads. All price constants live in one object; when DeepSeek updates rates you edit that one file and bump the version. Pure JS, zero build steps, zero runtime dependencies — clone and go. It injects no prompts, triggers no extra requests, and has zero impact on KV Cache or token accounting.

Who is it for? Developers and teams running deepseek-v4-pro or deepseek-v4-flash for daily development or batch inference who want a live per-session cost readout and a monthly big-picture ledger. It is read-only and does not alter any model behaviour, so it slots into your existing workflow without friction.