dsh-balance-tide

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DeepSeek Harness (DSH) Web plugin: account balance + peak/off-peak pricing tide indicator.

A live readout row under the composer:

[standard] peak pricing starts in 2d 5h | Balance ¥28.78 | ~¥0.42 this session | ?

Once peak/off-peak pricing takes effect (2026-08-17), the badge and countdown
follow Beijing time in real time:

[off-peak] peak in 2h 15m | Balance ¥28.78 | ~¥0.42 this session | ?   ← off-peak hours
[peak] off-peak in 1h 30m | Balance ¥28.78 | ~¥0.42 this session | ?   ← peak hours

Features

• Pricing badge: standard (before 2026-08-17) / peak / off-peak, judged live in Beijing time
• Countdown: time remaining until the next pricing switch, ticking every second — plan your usage ahead
• Balance: live balance from the official /user/balance endpoint (granted / topped-up split)
• Session cost: estimated at current-period prices (reuses sessionProjections; same-turn/step samples replace rather than double-count)
• Hover details: full price tables for the current and the next period, the peak/off-peak gap (peak = off-peak × 2), peak windows, and usage advice
• ? icon: opens the official pricing page https://api-docs.deepseek.com/zh-cn/quick_start/pricing/
• Zero config: reuses DEEPSEEK_API_KEY from DSH credentials — no key in the repo, ever
• i18n: UI follows the interface language (中文 / English)

Peak/off-peak schedule (Beijing time)

Per the official pricing page (2026-08 edition, last verified 2026-08-15):

• From 2026-08-17 00:00, peak/off-peak pricing applies; before that, current flat prices
• Peak windows: 09:00–12:00 and 14:00–18:00; all other hours are off-peak
• Off-peak = half of peak

Install

From npm (recommended)

dsh plugin --profile web add dsh-balance-tide

From the Git URL

dsh plugin --profile web add https://github.com/huanyuLv/dsh-balance-tide

From a local directory

dsh plugin --profile web add file:/path/to/dsh-balance-tide

Restart dsh web to take effect. Requires pnpm (npm i -g pnpm).

Configuration (in $DSH_HOME/profiles/web/cordis.patch.yml)

- id: dsh-balance-tide
  config:
    refreshIntervalMs: 300000   # how often the host polls the balance API
    clientPollIntervalMs: 30000 # how often the browser re-reads the cache
    currency: CNY
    allowedHosts: []            # register your domain here if you front dsh with a reverse proxy

When the official prices or the schedule change, override them in config — no need to
wait for a plugin release:

- id: dsh-balance-tide
  config:
    tideCutoff: '2026-08-17T00:00:00+08:00'   # when peak/off-peak pricing starts
    peakWindows:                              # peak hours (Beijing time, [start, end))
      - { start: 9, end: 12 }
      - { start: 14, end: 18 }
    tidePrices:                               # per-tier prices (per 1M tokens)
      flat:
        deepseek-v4-flash: { cacheHit: 0.02, cacheMiss: 1, output: 2 }
      peak:
        deepseek-v4-flash: { cacheHit: 0.1, cacheMiss: 3, output: 9 }
      offpeak:
        deepseek-v4-flash: { cacheHit: 0.05, cacheMiss: 1.5, output: 4.5 }

peakWindows: [] means there are no peak hours at all — use it if the tiered pricing
is ever withdrawn.

Security

• Credentials: prefer DEEPSEEK_API_KEY from DSH credentials. The apiKey config
  option is an escape hatch only — it lands in a config file in plaintext, so avoid it.
  baseUrl must be https; plaintext http is rejected outright (it would put the key on
  the wire).
• Balance endpoint: /query-tide serves your account balance, so readers are checked.
  The Host must be localhost, an IP literal, or a domain registered in allowedHosts
  (this blocks DNS rebinding); any request carrying an Origin must be same-origin (this
  blocks arbitrary web pages from reading your balance). Rejected reads get a 403.
• Error reporting: the server sends only a small set of error codes to the browser;
  raw exception text goes to the log, so a custom baseUrl never leaks to the frontend.

Known limitations

• Costs are estimates computed at current-period prices; the official invoice is authoritative.
• For multi-currency accounts the readout row shows the first currency only; the rest appear in the tooltip.
• deepseek-chat / deepseek-reasoner are no longer listed on the official pricing page —
  the static entries in prices are a fallback, not a verified quote.

Development

npm install
npm test

Compatibility

• DeepSeek Harness 0.1.0-rc.6+ (web profile)
• Node.js 20 / 22 / 24 (covered by CI)
• Cross-platform: pure JavaScript + standard browser CSS, no native modules
• License: MIT