DSH plugin for the DeepSeek Harness: live conversation cost and DeepSeek account balance in the composer stats row. Currency follows the UI locale: RMB (¥) in the Chinese UI, USD ($) in the English UI.

Features

Conversation cost: cumulative token usage over the whole session log × official DeepSeek pricing, shown as a live estimate — ¥ 0.0123 in the Chinese UI, $ 0.0018 in the English UI. Hover for the input/output/cache-read token breakdown and the pricing tier.
Account balance: queries the official DeepSeek GET /user/balance endpoint. A USD account is converted to RMB in the Chinese UI; a CNY account is converted to USD in the English UI (estimated rate, noted in the tooltip). Click to refresh, auto-poll every 60 s.
DeepSeek only: the cost hides itself for non-DeepSeek models; without a configured API key the balance shows "余额 — / Balance —".
Supported models: deepseek-v4-pro / deepseek-v4-flash / deepseek-chat / deepseek-reasoner (other DeepSeek models are estimated with the v4-pro tier).

Install

npm install dsh-cost

Then mount it in the deployment's cordis.yml (or a profile's cordis.patch.yml):

plugins:
  - name: 'dsh-cost'

The web client is composed automatically via the dsh.client declaration (platform: web); no further configuration is required.

Config

The Host half follows the llm-deepseek adapter settings ($DSH_HOME/settings.yaml):

Setting	Default	Meaning
`llm-deepseek.apiKeyEnv`	`DEEPSEEK_API_KEY`	Credential reference (environment-variable name) for the API key, resolved through the credentials service (`$DSH_HOME/.credentials.yaml` / environment / `.env`)
`llm-deepseek.baseURL`	`https://api.deepseek.com`	Base URL of the balance endpoint

Without an API key the balance shows "余额 — / Balance —"; the cost display is unaffected.

Pricing (USD, per 1M tokens)

Model	Input	Output	Cache read
deepseek-v4-pro	$0.435	$0.87	$0.003625
deepseek-v4-flash	$0.14	$0.28	$0.0028
deepseek-chat	$0.28	$0.42	$0.07
deepseek-reasoner	$0.55	$2.19	$0.14

Cache writes are billed at the input price (DeepSeek has no separate write fee).
Official DeepSeek USD pricing (the v4 tiers match the deployment's bundled pi-ai data). In the Chinese UI the same tiers are displayed in RMB.
Balance conversion uses the estimated rate 1 USD ≈ ¥6.79 (2026-08 central parity 6.7888). To follow official price or rate changes, edit the PRICING table in lib/client.js and USD_CNY in lib/index.js.

Privacy

The API key is resolved through the credentials service and used only to send the Bearer request to api.deepseek.com — it is never logged, never placed on a command line, and never returned to the browser.
The balance route lives on the harness web server's same-origin path /api/plugins/dsh-cost/balance; responses carry balance numbers only (no key) with Cache-Control: no-store.
The balance request runs inside the Host process (native fetch), not through a sandboxed subprocess.

Limitations

DeepSeek models and the official DeepSeek balance endpoint only.
Balance conversion uses a hard-coded estimated rate, not a live rate.
The cost is an estimate based on official pricing (token counts come from the Harness tokenUsage projection; discounts and taxes are not included).