dsh-client-ui-session-cost

A DeepSeek Harness client plugin that adds a session cost estimate to the composer statistics dock — the small row directly below the message input, next to the existing speed and token pills.

Cost ≈ $0.15

Hover the pill for the token buckets, the rates in force, and the model used. The number covers the whole Session (not just the loaded page of history) because it prices DSH's durable tokenUsage projection, and it updates as the Session streams.

Install

From the Discover tab

Turn on Experimental plugins → Custom plugin markets, open Plugins → Discover → Add index source, and enter:

https://raw.githubusercontent.com/iskrantxusa/dsh-client-ui-session-cost/main/market/index.json

The market lists Session cost pill; install the version you want after the usual confirmation. The index is plain format-1 JSON in market/index.json and is pinned to a Git commit.

From GitHub (recommended without the market)

dsh plugin add github:iskrantxusa/dsh-client-ui-session-cost

Or in the Web GUI: Sidebar → Plugins → Add plugin, paste github:iskrantxusa/dsh-client-ui-session-cost, and install.

The package is both a bundle and the plugin its patch inserts: installation selects it in dsh.profile.bundles, applies its cordis.patch.yml, and adds the ui-session-cost loader row. With HMR on (the default) the pill appears without a restart; otherwise restart DSH.

From the release tarball

Download dsh-client-ui-session-cost-0.1.0.tgz and use Plugins → Add plugin with the local file, or:

dsh plugin add C:\path\to\dsh-client-ui-session-cost-0.1.0.tgz

Manual (only when you cannot use the plugin manager)

Copy this directory to %USERPROFILE%\.dsh\profiles\desktop\node_modules\dsh-client-ui-session-cost and add to %USERPROFILE%\.dsh\profiles\desktop\cordis.patch.yml:

- insert:
    - id: ui-session-cost
      name: dsh-client-ui-session-cost

Do not combine the manual row with a bundle install: both insert the same row id. Remove the manual block before installing the bundle.

Rates

DeepSeek list prices, USD per 1M tokens (Models & Pricing):

Model	Cache hit (peak / off-peak)	Cache miss (peak / off-peak)	Output (peak / off-peak)
deepseek-flash	$0.006 / $0.003	$0.30 / $0.15	$1.20 / $0.60
deepseek-v4-pro	$0.044 / $0.022	$1.32 / $0.66	$3.96 / $1.98

Peak is 01:00–04:00 and 06:00–10:00 UTC, Monday–Friday; all other hours, weekends, and the Chinese holidays DSH does not know about are off-peak at half price. The total is cacheMiss + cacheRead + output, where cache misses include cacheWriteTokens.

The model is read from the modelSelection projection (next, else lastUsed). An unknown model falls back to deepseek-flash rates and the tooltip says "assumed rates". A Session that changed models mid-way is priced entirely at its latest model; the projection keeps no per-request model history. Search/Fetch API requests, tools with their own billing, and account bonuses are not included.

To change rates, edit PRICES in lib/client.js, bump the version, and reinstall.

How it works

lib/index.js is an empty host half: it exists only so the Loader has a row whose package declares dsh.client. The browser bundle lib/client.js registers one entry in the conversation.composer.dock list slot (id: cost, order: 2) and prices the Session-scoped tokenUsage projection, whose wire view is:

{ uncachedInputTokens, outputTokens, cacheReadTokens, cacheWriteTokens }

No build step and no dependencies beyond React from the platform module table. The bundle is a hand-written window.__ModuleLoader__.load({...}) in the same CJS-factory shape as the shipped client bundles.

Requirements and caveats

• A Web or Desktop DSH profile. HMR is the default and applies the patch live; without HMR, restart DSH.
• The estimate is reference information, not a billing record. Prices can change; verify against DeepSeek's page.
• The plugin ships no telemetry and makes no network requests. It only reads the Session projection DSH already keeps.

Uninstall

Plugins → the bundle → Remove, or the equivalent dsh plugin remove command. For a manual install, delete the copied package and the - id: ui-session-cost insert block.

Development

lib/client.js       browser half: rates, tooltip, composer-dock entry
lib/index.js        host half: empty apply
cordis.patch.yml    bundle patch: inserts the ui-session-cost row
test/test-cost.cjs  dependency-free pricing/registration checks

node test/test-cost.cjs
npm pack            # produces dsh-client-ui-session-cost-0.1.0.tgz

The test evaluates the bundle in a VM with a stub React and checks the official-rate math, peak/off-peak boundaries, display rounding, unknown-model fallback, and the exact conversation.composer.dock registration.

License

MIT © 2026 IskrantX. See LICENSE.