dsh-peak-cost-mode

dsh-peak-cost-mode

DeepSeek peak-pricing cost guard for DeepSeek Harness (DSH): during DeepSeek peak-pricing hours (Mon–Fri Beijing time 09:00–12:00 and 14:00–18:00, price ×2; weekends are always valley) the agent automatically switches to ultra-compressed caveman-style output to cut output tokens, and a header badge + toast keep you posted on every peak/valley transition.

Features

• Automatic peak detection — Beijing time (UTC+8, no DST) is checked every 30 s against the DeepSeek V4 peak-pricing schedule:

  Window (Beijing)	Tier	Price
  Mon–Fri 09:00–12:00	Peak	×2
  Mon–Fri 12:00–14:00	Valley	×1
  Mon–Fri 14:00–18:00	Peak	×2
  Mon–Fri 18:00–next 09:00	Valley	×1
  Sat & Sun (all day)	Valley (weekend)	×1

• Peak-hour cost saving — while in a peak window, a "Peak Cost Mode" prompt section is injected, instructing the model to reply in ultra-compressed caveman style (drop filler/pleasantries/hedging, keep all technical content verbatim: code, commands, API names, file paths, exact error strings, numbers; safety warnings and irreversible-action confirmations are never compressed).
• Transition reminders — toasts on every tier switch:
  • valley → peak: 「梁文锋来了，少说话多做事。」(Liang Wenfeng is here — talk less, do more.)
  • peak → valley: 「梁文谷来了，一切正常。」(back to normal)
• Persistent status badge — right side of the session header (left of the session-log button): red 高峰 ×2 · 省流中 during peak, green 🟢 低谷 · 主动省流中 while voluntary saving, green 低谷 ×1 otherwise, with full details (windows / multiplier / Beijing time / next switch) on hover. Clicking the badge opens the savings report.
• Voluntary saving in valley hours (0.3.0) — click the green badge during a valley window to open the report, then hit 「🟢 我要省钱！」 (I want to save!) in the bottom-right corner: the same caveman prompt section is injected and metering continues, with waves tagged source: voluntary kept separate from official-peak waves (source: peak). The badge stays green (with 🟢 to distinguish “voluntary saving”), and the report splits today/total into “peak saved / voluntary saved”. The switch is persistent across restarts and peak windows: entering a peak auto-merges into peak metering, leaving a peak auto-resumes voluntary saving, and you can stop it anytime via 「✋ 停止省流」 in the report.
• Savings metering (0.3.0) — during any saving mode the plugin intercepts every streaming model call (llm/stream) and records real token usage per model (input miss / cache hit / output, disjoint counts from the DeepSeek adapter). It then estimates how much the cave-man compression saved you and converts it to RMB at the DeepSeek peak output price:
  • saved tokens ≈ actual output tokens × r/(1−r) where r = compression ratio, default 0.6 (conservative; configurable 0–0.9).
  • saved RMB = saved tokens × model peak output price / 1M (peak price = valley ×2; e.g. V4-Flash output ¥9.0/M, V4-Pro output ¥27.0/M).
  • Output side only — the compression never changes input tokens or cache hits (the platform's prompt-reuse cache rate is independent of the plugin), so only the output side counts as money saved. The input-side cache delta (baseline vs. actual hit rate) is exposed in /stats as reference info only, never added to the savings.
  • The report shows the honest counterfactual: estimated output without the plugin → actual output → tokens and RMB saved, plus a per-model breakdown. Totals are persisted per wave to ${DSH_HOME:-~/.dsh}/dsh-peak-cost-mode/stats.json (v3) and survive restarts.
  • Good to know: the “saved” figure is an estimate (a counterfactual — the exact uncompressed output is unknowable). It is clearly labelled as such in the UI.
• Where savings are shown — the header badge (live counter), an ambient readout above the composer (conversation.composer.dock), toasts on peak/voluntary transitions, and a savings report panel (click the badge): current wave / today / total in tokens + RMB, per-model breakdown (counterfactual output → actual output → saved), peak-vs-voluntary split, and reset (POST /api/peak-cost/reset).

Install

dsh plugin --profile web add dsh-peak-cost-mode
# or from GitHub
dsh plugin --profile web add github:moon09300731/dsh-peak-cost-mode

Then restart dsh web and hard-refresh the browser page.

Configuration

Optional JSON file at ${DSH_HOME:-~/.dsh}/dsh-peak-cost-mode/config.json:

{
  "saveRatio": 0.6,
  "baseCacheHitRate": 0.5,
  "multiplier": 2,
  "peakWindows": [
    { "start": 9, "end": 12 },
    { "start": 14, "end": 18 }
  ],
  "weekendValley": true,
  "prices": {
    "deepseek-v4-flash": { "hit": 0.05, "miss": 1.5, "output": 4.5 },
    "deepseek-v4-pro": { "hit": 0.15, "miss": 4.5, "output": 13.5 }
  }
}

• saveRatio — assumed output-compression ratio of the cave-man mode (default 0.6; bounds 0–0.9).
• baseCacheHitRate — assumed input cache-hit rate for the “without plugin” counterfactual input invoice when no valley-time measurement exists (default 0.5).
• peakWindows — array of Beijing-hour peak windows, each {start, end} (default [{9,12},{14,18}]).
• weekendValley — true (default) means Sat/Sun are always valley/off-peak; set false to restore the old weekend-peak behavior.
• multiplier — peak multiplier used for the RMB conversion (default 2).
• prices — per-model valley prices in ¥ per million tokens; exact model keys override the built-in flash/pro defaults. Prices go stale — verify against the official DeepSeek pricing page; displayed savings are estimates, not an invoice.

How it works

• Host (src/index.mjs): a 10 s timer computes the Beijing wall-clock time and drives a three-state machine (peak / voluntary / none). Any saving state registers a systemPrompt section (peak-cost-mode, order 60) that makes model steps reply in compressed caveman style; leaving the state disposes the section. It subscribes to the llm/stream waterfall, wrapping each call to capture usage (input/cacheRead/output tokens) + model id on clean completion, and books it into the open saving wave (tagged source: peak or source: voluntary). Exposes GET /api/peak-cost/state, GET /api/peak-cost/stats, POST /api/peak-cost/voluntary?active=true|false (persistent voluntary switch) and POST /api/peak-cost/reset.
• Client (client.js): polls /api/peak-cost/state every 10 s (mirroring a snapshot to localStorage key dsh.peakCost.v1) and renders the badge, toasts, the composer readout and the report panel (with the「我要省钱！」/「停止省流」buttons in the bottom-right corner).

Note: the prompt section is registered in the host scope, so during any saving mode it applies to all sessions of the deployment (that is the cost-saving point). If you want per-session compression only, use the dynamic-plugin variant instead.

Development

npm test                       # node --check src/index.mjs && node --check client.js && unit tests
node scripts/verify.mjs        # independent recompute of /api/peak-cost/stats (all-PASS = correct accounting)

License

MIT © moon09300731