dsh-stats-hud

A sci-fi HUD for DeepSeek Harness: the session's stats become game-style level bars in a vertical column fixed to the far right edge of the web UI — without touching the original stats line.

Changelog

2026-08-24 — Peak / off-peak windows updated

• CLOCK badge now follows the official DeepSeek API peak-valley pricing: peak = Mon–Fri Beijing 09:00-12:00 / 14:00-18:00 (i.e. Mon–Fri 01:00-04:00 / 06:00-10:00 UTC); weekends are always OFF-PEAK (previously weekends inside those windows were wrongly shown as PEAK).
• Refactored the check into the pure isDsApiPeak(date) helper (weekday resolved on the Beijing calendar, so it is correct in any timezone) and exposed it via the test-only __test export.
• Added 3 unit-test groups covering window edges, weekends and the Beijing/UTC day boundary (9 tests total, all green).
• Docs synced (this README, README-CN.md and the Tuning section).

Instruments (all-English, LLM terminology)

While the agent is running the whole panel breathes and bars pulse.

Hovering the CONTEXT USAGE bar pops up a tooltip with the token breakdown:

Responsive layout

The HUD adapts to the free space right of the chat column (measured live with a ResizeObserver, so sidebar drags, the details drawer and window resizes all count):

The window width is a hard floor: below 800px the panel hides even with room to spare, and only the measured space decides full vs mini (the full panel needs 164px + 12px margin). mini may slightly overlap the chat on narrow windows — safe because the panel is click-through. If the chat column can't be measured, the panel falls back to full.

The mini tier in a narrow window:

Requirements

• DeepSeek Harness dsh (tested on 0.1.0-rc.6, macOS)
• pnpm (for plugin management)

Install

# from a local checkout
dsh plugin --profile web add /path/to/dsh-stats-hud

# or straight from GitHub
dsh plugin --profile web add https://github.com/lauytgary/dsh_hud_plugin

Then restart dsh web (loader entries are scanned at boot) and refresh the page. The package is installed as a link: dependency — after editing lib/client.js locally, only a restart is needed, no reinstall.

The plugin then shows up in Settings → Plugins:

Uninstall

dsh plugin --profile web remove dsh-stats-hud

How it works

• Registers into the conversation.composer.dock slot (id dsh-stats-hud, order 1) — only to receive the session-scoped hooks (useSession/useProjection); the panel itself is position: fixed, takes no layout space, and the stock stats line stays untouched.
• Data comes from the same projections the stock UI uses: useProjection("sessionStats"), useProjection("tokenUsage"), useProjection("contextPressure") and useProjection("contextBreakdown") — zero host-side changes.
• exports.inject = ["slots"] is mandatory: DSH's ctx is a strict proxy, and accessing an undeclared service throws (cannot get property "locale" without inject).
• The panel is pointer-events: none (click-through); only the CONTEXT USAGE bar re-enables pointer events so its hover tooltip works.

Files

dsh-stats-hud/
├── package.json          # dsh.bundle (patch layer) + dsh.client (browser entry)
├── cordis.patch.yml      # inserts the plugin into loader entries
├── lib/
│   ├── index.js          # host-side no-op (pure browser plugin)
│   └── client.js         # browser bundle: HUD components + slot registration
└── test/
    └── format.test.js    # pure-function unit tests (node:test, zero deps)

lib/client.js is a hand-written loader bundle (window.__ModuleLoader__.load) — no build step needed.

Development & testing

npm test   # pure-function unit tests (node:test, no dependencies; Node ≥ 18)

The tests load lib/client.js in a Node VM with a stubbed loader (no DOM needed) and exercise the pure helpers — formatTokens, formatDuration, formatTps, tierOf, billedInputTokens, cacheHitPercent. The test-only __test export is gated behind the DSH_HUD_TEST env var, so the browser bundle is unaffected.

Tuning

All constants live in lib/client.js:

• Labels: the L object (all-English LLM terminology)
• Peak hours: LocalClock delegates to isDsApiPeak(date), which checks the Beijing (UTC+8) weekday bjDow >= 1 && bjDow <= 5 (Mon-Fri) together with bjMin >= 540 && bjMin < 720 (9-12h) / >= 840 && < 1080 (14-18h), where bjMin/bjDow come from new Date(date.getTime() + 8*3600e3) — weekends are always off-peak
• MissionRolling: rolling drums for steps/turns (no full scale)
• ChannelBar: segment ratio = llmMs / (llmMs + toolMs) (no cap)
• SpeedGauge's redline = 200 (initial; auto-scales in 100 tok/s steps)
• ContextUsageBar: segment colors and the ≥80% solid-red threshold; the hover tooltip reads systemTokens / toolsTokens / messageTokens from the contextBreakdown projection
• Rolling counter: DRUM (3× 0-9), DRUM_H = 15 (px per digit), RollingValue's carry/borrow formula and mount spin-up
• CSS: position:fixed; right:12px; tiers in tierOf(space, width) — width < 800 → hidden (window-width floor), space >= 180 → full, else mini (measurement failure falls back to full) — plus the .gsh-root.gsh-* rules; @media (prefers-reduced-motion: reduce) disables pulses and transitions

Publishing to npm (optional)

# remove "private": true from package.json, then
npm publish
# users install with:
dsh plugin --profile web add dsh-stats-hud

Contact

Questions, ideas or issues? Open a discussion on GitHub:

• Discussions

License

MIT