# dsh-peak-balance

**English** · [中文](README.zh.md)

Peak/off-peak billing clock, live DeepSeek account balance, per-turn cost and a
`/hist` token-history grid — inside
[dsh-TUI](https://github.com/ccch1mneyyy/dsh-TUI).

```
⚡ 峰时 09:00-12:00 · 距谷时 1h23m · 本轮 ¥0.0234 · 余额 ¥42.10
```

(The order is phase → countdown → turn → balance: a narrow terminal truncates
the tail, and the per-turn cost is the figure that changes while you watch. While
the model is still answering, the turn figure is **live** — rendered as
`本轮·计费中 ¥…` and refreshed on every usage report — and it freezes to
`本轮 ¥…` once the turn closes.)

While the peak window is active you can turn the line into a three-row frame
that pulses in one of seven colors:

```
╭──────────────────────────────────────────────────────────╮
│ ⚡ 峰时 · 距谷时 1h23m · 本轮 ¥0.0234 · 余额 ¥42.10   ▂▃▄▅▆▇ │
╰──────────────────────────────────────────────────────────╯
```

`/hist` (also `/tokenhistory`, `alt+h`, or `/th` with a trailing space — see
below) takes over the whole terminal with a GitHub-style contribution grid:

```
╭─ 🐋 Token history  Total tokens  26w  subagents counted ───────────────── ✕ ─╮
│ updated 12:04:11 · 341 sessions · 6,706 reports · 9 active days               │
│ ───────────────────────────────────────────────────────────────────────────── │
│      6月      7月      8月      9月                                           │
│ Mon  ▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢                                               │
│ Wed  ▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢                                               │
│ Fri  ▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢▢                                               │
│                       ▲                                                       │
│ Total tokens less ▢▢▢▢▢ more · peak 251,442,584                               │
  ╭─ 2026-09-11 Fri ───────────────────────────────────────────────────────╮
  │ tokens      input(miss) 2,065,340 · cache read 224.3M · output 1.5M       │
  │ cost        ¥18.8494                                                      │
  │ cache hit   99.1% · subagent share 12.4%                                  │
  │ model       deepseek-flash 227.9M · deepseek-v4-pro 3.2M                  │
  ╰───────────────────────────────────────────────────────────────────────────╯
│ Total       1,079,834,040 · Est. cost ¥64.6867 · cache hit 99.0%              │
│ subagents   36/341 sessions · 945 reports · busiest 2026-09-11                │
│ ───────────────────────────────────────────────────────────────────────────── │
│ model                              tokens   cost(est) hit rate    rates       │
│ ───────────────────────────────────────────────────────────────────────────── │
│ deepseek-flash                     587.3M      ¥33.94    99.3% built-in       │
│ deepseek-v4-flash-vision-exp       412.6M      ¥24.53    98.8% built-in       │
│ deepseek-v4.1-flash-expires…        68.2M           —    98.5%  unknown       │
│ deepseek-v4-pro                      8.0M       ¥4.28    95.4% built-in       │
│ deepseek-v4-flash                  457.2k     ¥0.0975    90.1% built-in       │
│ ←/→ week · ↑/↓ day · t today · m metric · w span · s subagents · r rescan · q/Esc close │
╰───────────────────────────────────────────────────────────────────────────────╯
```

## Features

| Feature | What it shows |
| --- | --- |
| Peak / off-peak clock | The billing window currently in force and a live countdown to the next price switch (`09:00-12:00` / `14:00-18:00` Beijing time, Monday–Friday; weekends are off-peak all day). |
| Account readout (provider-neutral) | The balance or plan quota of **the provider the focused conversation actually runs through**: an official balance, a subscription's 5-hour/weekly/monthly windows, a relay's credit pool. The provider comes from `request/header.config.provider` in the session log, and its base URL and credential reference are resolved through the harness seams. A provider with no readable interface is simply left off the line — no figure is ever guessed. |
| Per-turn cost | What the turn that just finished cost. When the provider exposes a spend counter (Command Code credits, OpenRouter key usage, a relay's used quota) this is **measured** from that counter; otherwise it is estimated from a rate card, and otherwise the line says the model is unrated. The figure follows the conversation you are **focused on**, not the one that last appended an event. |
| Quota diagnostics `/quota` | One command shows what is being read, which adapter answers, why the last read failed, and every provider route this process could ask about (`/quota check <provider>` probes one on the spot). |
| Peak-hour warning | Optional. While peak pricing is active the status contribution becomes a rounded frame whose border, phase label and travelling waveform pulse in the chosen color. |
| History grid `/th` | A full-screen scene: one square per day, shaded by that day's usage, with a hover card for the day under the pointer. Keyboard: `←/→` walks days, `↑/↓` walks weeks, `m` cycles the metric, `w` the span, `s` the subagent switch, `r` rescans, `q`/`Esc` returns to the conversation. |
| Totals and per-model stats | Totals: tokens, estimated cost, cache-hit rate, active days, sessions, subagent share, busiest day. Model table: each model's total tokens, estimated cost, cache-hit rate and where its rates came from. The totals row covers **all history** (it does not follow the grid's span) and says so inline. |
| Custom rates `/th price` | Price a model the embedded card does not list; until you do, it reports tokens with an explicit "unrated" marker instead of a guessed amount. |
| Follows the UI language | **Instant** hand-off with dsh-TUI's `/lang`: the status line, the history scene and every command reply switch with it. The host mirrors the choice into its `dsh-tui` settings namespace and the plugin listens for `settings/updated`; a 1 s poll of `~/.dsh-tui/lang.json` covers hosts that serve no such namespace. The settings card and the command-completion descriptions were already bilingual. |
| Settings subpage | The **Peak & Balance** card gains a **Token history** subpage with ten options. |

## Install

```sh
# from npm
dsh plugin --profile dsh-tui add dsh-peak-balance

# ...or straight from a checkout of this repository (pnpm packs the local
# directory, so the profile keeps a real copy instead of a symlink)
dsh plugin --profile dsh-tui add file:/absolute/path/to/dsh-peak-balance
```

The command appends the bundle row to the profile's `dsh.profile.bundles`.
Then restart the TUI (`/restart` inside dsh-tui) so the profile loads the new
row; the settings card appears under `/settings` immediately after the restart.

> Installing by symlink (`link:` or a directory junction) is not recommended:
> Node resolves a plugin's real path, and `@deepseek-ai/*` must stay reachable
> from it. `file:` and npm installs both leave a real directory inside the
> profile, which is the layout the host expects.
>
> Updating a `file:` install: pnpm caches a local directory dependency, so
> `add`/`update` alone will **not** pick up edited sources. Remove and re-add
> it (after a version bump) to refresh the profile copy:
>
> ```sh
> dsh plugin --profile dsh-tui remove dsh-peak-balance
> dsh plugin --profile dsh-tui add file:/absolute/path/to/dsh-peak-balance
> ```

## Settings

`/settings` → the **Peak & Balance** card. Edits are written live; no restart is
needed.

Main card:

| Field | Type | Default | Meaning |
| --- | --- | --- | --- |
| Show balance | boolean | `true` | Show the account section on the status line (the provider's quota meter, as an amount or a percentage). |
| Show per-turn cost | boolean | `true` | Show what this turn has cost: a live estimate while the model answers, frozen when the turn closes (measured from the provider's counter when it has one). |
| Peak-hour warning | boolean | `false` | Turn the line into a pulsing frame while peak pricing is active. |
| Warning color | select | `red` | Frame color: `red` `orange` `yellow` `green` `cyan` `blue` `purple`. |

**Provider quota** subpage:

| Field | Type | Default | Meaning |
| --- | --- | --- | --- |
| Quota provider | text | `auto` | `auto` follows the focused conversation's provider; a provider id (`commandcode`, `openrouter`, …) pins that one; `off` hides the account section. |
| Quota metric | select | `auto` | `auto` (the tightest window), `balance`, `window5h`, `windowWeekly`, `windowDaily`, `windowMonthly`, `planRemaining`, `keyLimit`, `periodSpend`, `lifetimeSpend`, or `rotate` (cycle every meter, one every 8 s). |
| Turn spend | select | `auto` | `auto` (measured when the provider has a counter), `measured`, `estimate`. |
| Unofficial endpoints | boolean | `false` | Allow quota reads from endpoints no provider documents publicly (mostly reverse-engineered console APIs). |
| Provider spec file | text | empty | JSON file describing providers this build ships no adapter for; empty uses `~/.dsh-tui/dsh-peak-balance-providers.json`. |
| Billing mode | select | `auto` | How the account readout is shaped: `auto` follows the provider's declaration (a subscription shows percentages, pay-as-you-go shows amounts), or force `money` / `plan`. |
| Percentage base | select | `meter` | What a plan percentage divides by: `meter` uses the window the line is showing, `monthly` the whole monthly pool. |

**Token history** subpage:

| Field | Type | Default | Meaning |
| --- | --- | --- | --- |
| Grid metric | select | `tokens` | What the squares shade: `tokens`, `cost`, `output`, `cacheMiss`. |
| Time span | select | `26` | Week columns drawn: `13` / `26` / `53`. |
| Count subagents | boolean | `true` | Subagent sessions spend real tokens; off reports only your own conversations. |
| Week starts on | select | `mon` | Which weekday is the grid's first row (`mon` / `sun`). |
| Grid palette | select | `github` | `github` (green), `blue`, or `theme` (the active accent). |
| Scene layout | select | `card` | `card` frames the scene in a rounded box with section separators; `plain` drops the chrome (2 rows / 4 columns cheaper). Card falls back to plain by itself on a small terminal. |
| Hover: tokens | boolean | `true` | Show the input / cache-read / output split in the day card. |
| Hover: cost | boolean | `true` | Show the hovered day's estimated cost. |
| Hover: cache hit rate | boolean | `true` | Show the hovered day's cache-hit rate. |
| Hover: models | boolean | `true` | Show which models the hovered day used. |

The settings live in the `dsh-peak-balance` namespace of the dsh settings
document, so they can also be edited there directly. **The scene's `m` / `w` / `s`
keys are settings changes**: they write back immediately (and survive a restart);
if the write is refused the change stays for the current session and a warning is
logged.

## `/hist` — token history

```sh
/hist                                 # open the grid (recommended: no built-in collision)
/tokenhistory                         # the long alias
alt+h                                 # same thing without typing
/th                                   # works too, but keep the trailing space (see below)
/hist price                           # list custom rates and unrated models
/hist price set <model> <hit> <miss> <out> [peakHit peakMiss peakOut]
/hist price rm <model>
/hist price clear
/quota                                # quota diagnostics: source, adapter, meter, last failure
/quota check <provider>               # probe one provider now (empty = the current target)
/quota meter windowWeekly             # switch the status-line meter (same as the setting)
```

### Why a bare `/th` + Enter switches the theme

A host behaviour the plugin cannot change, stated plainly: while dsh-tui's
slash-completion overlay is open, Enter runs the **highlighted suggestion**, not
the line you typed (`handleEnter` in `PromptInput.js`); the merged list puts
built-ins first and appends plugin commands, and the selection resets to the
first row. Typing `/th` matches `theme`, `thinking` and our `th`, so the
highlight sits on `theme` and Enter switches the theme.

| Entry point | Note |
| --- | --- |
| `/hist` | **Recommended.** `hist` is not a prefix of any built-in, so the menu offers only it and Enter runs it. |
| `/tokenhistory` | Same, no collision. |
| `alt+h` | Opens the scene straight from the chat state. |
| `/th ` + Enter | Keep the trailing **space**: the menu closes (no children), and Enter dispatches `th`. |

> A future SKILL whose name starts with `hist` would capture `/hist`'s Enter the
> same way — same host logic; rename then (it is one constant in the code).

### Keyboard

| Key | Effect |
| --- | --- |
| `←` / `→` | Move to the **square to the left/right** (same weekday, one week) |
| `↑` / `↓` | Move to the **square above/below** (same column, one day) |
| `t` | Jump back to today |
| `m` / `w` / `s` | Cycle metric / span / subagents (the matching chip flashes; the change is persisted) |
| `r` | Rescan |
| `q` / `Esc` | Back to the conversation |

Moves stop at the grid edge and never enter a day that has not happened yet (no
wrapping). The selected square is lightened and a `▲` under the grid points at its
column.

**Subagent feedback:** the title bar carries a permanent chip (`subagent counted`
— green — or `subagent excluded`), pressing `s` inverts it for 1.2 s, and the
totals row spells out `excluded N sessions / M reports` instead of just shrinking
the numbers.

**The data source is this machine's session logs** (`$DSH_HOME/sessions/`). Every
`assistant/message` event in those logs carries the usage DeepSeek returned for
that request (`inputTokens` / `cacheReadTokens` / `outputTokens` /
`cacheWriteTokens`); the plugin files each report into the Beijing calendar day
and the peak/off-peak tier of **its own timestamp**, then per model. So:

- **tokens are the provider's own reported numbers**, not a local estimate;
- **money is an estimate** (the API returns tokens, never money), converted with
  the embedded rate card or your custom rates, and labelled as such;
- only **this machine's dsh usage** is covered — web chat or other clients are not;
- the covered range is whatever this machine's logs still hold.

**Subagents** count by default (they spend real money), stay distinguishable, and
can be switched off.

**Unrated models** (not on the embedded card) show tokens with `—` for money
until you give them rates through `/hist price set`. Custom rates are written
immediately to `~/.dsh-tui/dsh-peak-balance-rates.json` and feed both the history
view and the status line's per-turn figure. `<hit> <miss> <out>` are the
**off-peak** prices in CNY per million tokens; peak defaults to twice those (the
official rule), and you can pass three more numbers to set the peak tier
explicitly.

**Two implementation details that decide the accuracy** (both reproducible on
real logs):

1. The logs are **multi-frame zstd** (one frame per append).
   `zlib.zstdDecompressSync` stops after the first frame, and scanning for the
   magic bytes can hit the magic *inside* a compressed block — where a truncated
   decode still "succeeds" with partial content and silently drops events. The
   plugin parses the zstd frame and block headers to compute each frame's exact
   length: on this machine's 341 logs the byte-scanning approach lost 282 events,
   the header walk recovers all of them.
2. Fork/rewind logs **physically carry their parent's event prefix**. The cut is
   the header's `seedLength` (the first `session/end-seed` event sits on it);
   without it a naive sum counts the parent's usage twice — 292 usage reports
   (~4.5%) across this machine's nine seeded logs.

**Cache.** Activation reads the incremental cache and paints the grid from it, so
opening the scene is instant; the scan that follows only refreshes what changed.
The cache is keyed by `(path, size, mtime)` and an up-to-date corpus lands in
20–30 ms. It lives at `~/.dsh-tui/dsh-peak-balance-history.json` (safe to
delete — it rebuilds); the one genuinely slow case is that first rebuild on a
large corpus, which checkpoints as it goes so an interrupted run resumes instead
of starting over. While the scene is open it re-scans once a minute behind the
figures (the status line shows `refreshing`); closing it stops that.

## How the numbers are produced

**Peak window.** Off-peak pricing is half of peak pricing; peak hours are
Beijing time (UTC+8) Monday–Friday `09:00-12:00` and `14:00-18:00`, everything
else — including both weekend days — is off-peak.

**Cost.** DeepSeek's API returns token counts, never money, so the per-turn
figure is an **estimate**:

```
cost = inputMissTokens   × inputMissRate
     + cacheReadTokens   × inputHitRate
     + outputTokens      × outputRate
```

The three input-side figures are **disjoint**: `inputTokens` is the prompt that
missed the cache, `cacheReadTokens` is the prompt served from cache, and the
provider's own `totalTokens` is their sum plus the output. Treating the cache
read as a *subset* of the input (clamping one against the other) under-prices a
cached turn by several times — measured against a real balance drop on
2026-09-10, a turn that cost ¥0.20 was estimated at ¥0.03 that way and ¥0.23
with the formula above.

Each provider usage report is filed into the peak or off-peak bucket using the
timestamp of the request that produced it, so a turn straddling a price
boundary is not priced wholesale at the current window.

Embedded rate card (CNY per million tokens), verified **2026-09-10** against
the official [Models & Pricing](https://api-docs.deepseek.com/zh-cn/quick_start/pricing)
page:

| Model | Bucket | Input (cache hit) | Input (cache miss) | Output |
| --- | --- | --- | --- | --- |
| `deepseek-flash` | off-peak | 0.02 | 1 | 4 |
| `deepseek-flash` | peak | 0.04 | 2 | 8 |
| `deepseek-v4-pro` | off-peak | 0.15 | 4.5 | 13.5 |
| `deepseek-v4-pro` | peak | 0.30 | 9 | 27 |

The legacy ids `deepseek-v4-flash` and `deepseek-v4-flash-vision-exp` are
served by DeepSeek-V4.1-Flash and priced at the Flash rates;
`deepseek-v4-pro` is rerated to the Flash card from 2026-09-14 12:00 Beijing,
when that route is retired to V4.1-Flash. A model the card does not know is
reported as `费率未知 / unrated model` — the plugin shows tokens instead of a
wrong number.

**Balance.** `GET https://api.deepseek.com/user/balance` (the same read-only
endpoint behind dsh-tui's `/balance` command). The key is resolved through the
`credentials` seam (`DEEPSEEK_API_KEY`) with an environment fallback, is sent
only in the request header, and is never logged or stored by this plugin.

## Third-party providers

Since 0.4.0 the account section is no longer DeepSeek-specific. The plugin
resolves, in order, **which provider to ask**, **where it lives** and **how to
ask it** — and degrades quietly at every step it cannot complete:

1. **Provider** — the focused conversation's last `request/header.config.provider`
   (in `auto` mode; the setting can pin one provider or turn the section off).
2. **Endpoint and credential** — the provider's own settings section (pointed at
   by `ctx.llm.listConfigurableProviders()`) → the spec file → the generated
   catalog snapshot. The key is resolved through the `credentials` seam with an
   environment fallback of the same name.
3. **Adapter** — by provider id, then by base-URL host, then by spec. Nothing
   matches → the section is left off the line (it only says `no API` when you
   pinned that provider yourself).

### Built-in adapters

| Adapter | Providers | Meters | Verified against a real account |
| --- | --- | --- | --- |
| `deepseek-balance` | `deepseek-official` / `deepseek` | balance, in the reported currency | ✅ yes |
| `commandcode-plan` | `commandcode` | 5-hour and weekly windows, monthly plan remainder, period spend | ✅ yes (a live GOAT plan) |
| `openrouter` | `openrouter` | balance (credits − usage), key limit, daily/weekly/monthly usage | ⚠️ no — built from the official docs, tested with fixture payloads |
| `moonshot-balance` | `moonshotai` / `moonshotai-cn` | balance (CNY on `.cn`, USD internationally) | ⚠️ no |
| `siliconflow-balance` | `siliconflow` routes | balance (the API states no currency, so none is printed) | ⚠️ no |
| `openai-billing` | gateways **declared in the composition** (One API, New API, self-hosted) | `soft/hard_limit_usd` (one grant, both fields equal) minus `total_usage` (cents); the unit follows the gateway's own display setting | ⚠️ no |
| `declared` | anything in the spec file | whatever the spec says | — |

OpenRouter's `/credits` requires a **management key** (an ordinary key is refused
with 403), so the adapter asks `/key` in parallel and still reports the key's
limit and usage when only an ordinary key exists.

### Plans read as percentages

The shape of the account readout **follows the provider's billing method**: a
pay-as-you-go account (a currency balance, debited per token) shows amounts,
while a subscription (capped rolling windows over a monthly pool) shows
**percentages** — how much of the cap is left, and what share of it the turn just
drew. The order is: the `Billing mode` override, then the provider's own
declaration (an adapter, or a spec stanza's `billing`), then the data (capped
windows with no currency balance read as a plan). The inference is deliberately
conservative: an unrecognized shape reads as money — absolute figures — rather
than inventing a denominator.

`Percentage base` picks the **denominator**: the window the status line is
showing by default (the tightest limit — the one whose reset countdown is right
there), or the whole monthly pool. Each falls back to the other, so a provider
reporting only one of them still gets a usable divisor. **No cap, no
percentage**: the figure falls back to absolute amounts.

```
🌊 off-peak · weekend · peak in 18h26m · turn 1.79%(0.2500) · plan GOAT · 5h 92.9% left(1.00/14.00) · resets in 1h00m
```

**A narrow terminal keeps the percentage and drops the rest.** Every part may
carry a compact form (`turn 1.79%`); when the full line does not fit, the compact
forms are swapped in from the right, which is where the host truncates first. The
width comes from the host's terminal-size hook when there is one, then
`process.stdout.columns`; with neither, the line renders in full exactly as
before.

Precision follows magnitude: two decimals below 10% (a subscription turn is often
a fraction of a percent, where one decimal would look frozen), one at or above
it, `<0.01%` for anything smaller, and `0%` for a true zero.

### The spec file (providers with no adapter)

`~/.dsh-tui/dsh-peak-balance-providers.json` (safe to delete; a broken file reads
as an empty config):

```jsonc
{
  "version": 1,
  "apiBases": { "my-relay": "https://relay.example.com" },
  "allowUnofficial": false,
  "providers": {
    "my-relay": {
      "adapter": "declared",
      "auth": { "kind": "bearer", "apiKeyEnv": "MY_RELAY_KEY" },
      "requests": [
        {
          "path": "/api/user/self",
          "headers": { "New-Api-User": "1" },
          "meters": [
            { "id": "balance", "kind": "money", "currency": "USD", "value": "data.quota", "scale": 0.000002 },
            { "id": "periodSpend", "kind": "money", "currency": "USD", "used": "data.used_quota", "scale": 0.000002 }
          ]
        }
      ],
      "spendCounter": "data.used_quota",
      "spendUnit": { "kind": "money", "currency": "USD" }
    }
  }
}
```

Dot paths accept array indices (`data.0.results.0.amount`), `scale` converts
units, and `resetAt` understands `ms` / `s` / `iso` / `remainingMs` /
`remainingS`. **The New API / One API account endpoint authenticates with a web
access token, not the `sk-` relay key**, so store one separately (the
`MY_RELAY_KEY` above) and enable `allowUnofficial` — it is a console-side API.

Other recipes that need no code, only a spec stanza:

| Target | Fields that matter |
| --- | --- |
| Anthropic organization cost (admin key) | `GET /v1/organizations/cost_report`, amount at `data.0.results.0.amount`, unit is **cents** (`scale: 0.01`), currency USD |
| MiniMax coding plan | `GET https://www.minimaxi.com/v1/api/openplatform/coding_plan/remains`, `model_remains.0.current_interval_usage_count` / `..._total_count`, reset via `remains_time` with `resetUnit: "remainingMs"` |
| 智谱 balance | `GET https://open.bigmodel.cn/api/biz/account/query-customer-account-report`, `data.availableBalance` (CNY) |

## Compatibility

| Item | Value |
| --- | --- |
| Host | `@deepseek-harness-tui/dsh-tui` 0.10.x (`ctx.tuiStatus.registerView`, `ctx.tuiSettingsSections.register`, `ctx.tuiScenes.register/open`, `ctx.commands.register`, `ctx.tuiCommandTrees.register`, `ctx.tuiShortcuts.register`) |
| Harness | `@deepseek-ai/dsh` 0.1.2-rc.1 or later (`session/event`, `settings`, `credentials`) |
| Runtime | Node `^22.19 \|\| >=24`, pure ESM, no native dependencies (multi-frame zstd uses the built-in `node:zlib`) |
| Manifest | `manifestVersion` 0.15 · id `com.dsh-tui-ecosystem.dsh-peak-balance` · contracts `tui.dsh/v1alpha1#DecisionEvents` (optional) and `commands.dsh/v1alpha1#Command` (required) · four command contributions (`/hist`, `/th`, `/tokenhistory`, `/quota`) |
| Platform | Anywhere dsh-tui runs (Windows / macOS / Linux) |

Every host seam is optional and probed softly (`ctx.get(name, false)`): without
the TUI extension services, without a credentials service, or without network
access the plugin stays inert instead of failing the host. All registrations are
retried for 30 s while the profile composes, and every timer is cleared from the
activation's effect disposer.

The commands prefer the **mediated** surface (`ctx.tuiPluginHost.registerCommand`,
C-041 attribution plus the invoke checkpoint) and fall back to
`ctx.commands.register` (the documented C-070 boundary) when the host refuses it.
A third-party plugin loaded as a plain profile row has no verified component
identity, so the fallback is the path that actually answers here; when both fail
the plugin logs once and everything else keeps working. `alt+h` goes through
`ctx.tuiShortcuts.register` (ctrl/alt required, reserved combos refused with a
no-op disposer — `alt+h` collides with nothing).

**Language.** The plugin renders in the language dsh-TUI is showing, resolved in
the host's own order: `DSH_TUI_LANG` → the live `dsh-tui.lang` setting →
`~/.dsh-tui/lang.json` → the OS locale (an absent locale keeps the historical
`zh`, any other unsupported one falls back to `en`, matching dsh-TUI). A `/lang`
switch repaints the status line and an open history scene immediately through the
settings service's `settings/updated(ns, next, prev, source)` event; where that
namespace is not served, a 1 s poll of the persisted file (guarded by an
mtime/size stamp) picks the change up instead. `DSH_PEAK_BALANCE_LANG_FILE`
overrides the file path for tests and diagnostics.

## Known limitations

- **The prompt border itself cannot be recolored by a plugin.** dsh-tui 0.10
  draws the input frame in its own `EffortInputBorder` component and exposes no
  seam for it, so the warning frame is a status contribution rendered directly
  above the prompt — the closest a plugin can get without patching the host.
- Cost figures are estimates from provider-reported tokens; the platform bill
  is authoritative.
- The rate card is embedded in the package. A price change on DeepSeek's side
  requires a plugin update; a model the card does not list needs `/hist price set`.
- The account section depends on the provider's own API: **a provider with no
  public quota interface shows no figure at all** (OpenAI, Gemini, Anthropic
  prepaid balance, the GLM/Kimi coding plans, Claude subscriptions), rather than
  a guessed one. A spec stanza can cover your own deployment or an interface this
  build does not ship.
- **Only the DeepSeek official and Command Code adapters were verified against a
  real account** (see the table above). The other named adapters are implemented
  from each provider's own documentation and tested with fixture payloads drawn
  from it; they have not been checked against a live account.
- **Undocumented endpoints are opt-in** (`allowUnofficialQuota`), because they
  can change without notice: a provider whose spec stanza (or the spec document)
  sets `"allowUnofficial": true` is only queried while that global switch is on
  too. Command Code's `/alpha/*` routes are exempt: they are the ones the
  provider's own CLI drives.
- **No Command Code price card is embedded.** Its model catalog carries no
  prices and its pricing page is generated client-side, so an estimate would have
  been invented; subscription models show tokens only until you set rates with
  `/hist price set commandcode:<model> …`, while the per-turn figure stays the
  provider's own measured number.
- **Every `/hist` money figure is CNY.** A cost comes from a rate card — the
  built-in table or your `/th price` custom rates — and both are denominated in
  CNY per million tokens, so the totals block, the per-provider subtotals and
  the model table all print `¥`. `credits` describes an account's own meter on
  the status line; it is never a cost column.
- **The history cache is at version 2**, so the first `/hist` after upgrading
  rebuilds it from the session logs (a few seconds on this machine; the scan
  checkpoints as it goes).
- **`/quota`'s provider list** merges the LLM seam's directory, the generated
  catalog snapshot and the spec file; a route declared in the composition but not
  currently routable may not appear.
- **The balance is shown in the currency the endpoint reports.** The payload
  carries `currency` (`CNY`, `USD`, …), and the line uses the matching symbol
  (`¥`, `$`); an unknown currency falls back to its ISO code (`12.34 CHF`)
  instead of passing a dollar figure off as yuan.
- Rich status contributions share a six-row budget with other plugins; this one
  requests three rows, and only while the warning frame is visible.
- The line follows the conversation the host reports as **focused**: switching
  conversations moves it with you. A settled turn is remembered per
  CONVERSATION, so leaving one and coming back still shows that conversation's
  own last turn; `—` appears only when the focused conversation has no settled
  turn in this process yet (a conversation just started with `/new`), never
  another conversation's figure.
- **Subagent spend counts toward the turn that spawned it.** A child session's
  usage is folded into the parent conversation's running turn via the
  `parentSession` in its session header; a background child that reports after
  the parent's turn closed no longer counts (that turn is settled). A host that
  names no parent keeps the old behaviour and ignores the child. Note that
  `/hist` reports subagents separately (its own "count subagents" switch), so its
  grand total and the status line are not the same measurement by design.
- **An empty marker is a resting state, not a repeated `/new`.** The host writes
  `~/.dsh-tui/resume.txt` empty both on `/new` and when it exits a session it
  cannot resume, so the plugin applies that reading only when the file's content
  or mtime actually changes. Earlier versions re-applied it once per poll, which
  muted the conversation that owned the line — permanently, since the
  cleared-focus guard then skipped that conversation's own events.
- **Billing verdicts are fixed per request and per turn.** A usage report is
  filed under the tier its request STARTED in (`step/start`), and a turn's rates
  and model come from its first report, so a mid-turn model switch or the
  2026-09-14 Pro→Flash route change cannot reprice a whole turn retroactively.
  Settlement itself only matters for a turn that recorded no report at all.
- **A bare `/th` + Enter is captured by the host's completion overlay** (see
  "Why a bare /th + Enter switches the theme"): the plugin cannot move its own
  entry to the front of that list. Use `/hist`, `/tokenhistory`, `alt+h`, or
  `/th ` with a trailing space. A future skill starting with `hist` would capture
  `/hist` the same way.
- **The history covers only this machine's dsh usage.** Calls made elsewhere
  (web chat, other clients, other machines) are not in these logs, and the
  earliest covered day is whatever the local logs still hold.
- **The first `/th` on a machine with no cache** needs a few seconds for the full
  scan (341 logs / ~80 MB here ≈ 4–5 s) and shows progress while it runs; the
  scan checkpoints as it goes, so an interrupted first run resumes. Once the
  cache exists, opening the scene answers from it immediately.
- **Mouse hover needs the full-screen (alternate screen) layout** — the profile
  ships `fullscreen: true`. In inline mode the keyboard (`←/→/↑/↓`) selects days
  and shows the same detail card.
- Square shading uses quartiles of the non-zero days in the visible span, so a
  value's color bucket can shift as history grows (GitHub behaves the same); the
  legend always states the current maximum.
- **A terminal that is too narrow trims weeks instead of shrinking squares.** The
  title chip says `showing 27/53w`, and `←`/`→` scroll the window one column at a
  time so the selection is never hidden. Too few rows degrade in priority order:
  the model table, then the detail card's fields (models first, then hit-rate /
  cost / tokens), then the totals row. Under 12 rows or 40 columns the scene
  switches to a fallback list (one recent day per line plus a totals line) so
  nothing ever overflows.

## Publishing and versioning

Released from [VviLliAm-qwq/dsh-peak-balance](https://github.com/VviLliAm-qwq/dsh-peak-balance)
under MIT. Versions follow
SemVer; the npm `version` and the manifest `version` are kept identical, and a
`v*` tag matching the version drives the release workflow.

## Development

```sh
pnpm install --frozen-lockfile
pnpm check:encoding      # no UTF-8 BOM / damaged sequences (the classic dsh crash)
pnpm validate:manifest   # admission shape + version agreement
pnpm test                # node:test unit + host-stub integration tests
pnpm pack:verify         # every module the entry imports ships in "files"
pnpm verify              # all four, in order
```

The tests cover the peak-window maths at fixed instants, the rate card and
bucket pricing, usage normalization, balance-payload parsing (including
failures), the display model, the status component's element tree, a full
`apply()` run against a stubbed Cordis context — including the paths where the
host services are missing, refuse, or throw — and the whole history stack: day
and week arithmetic, fork-seed cutting, the view model, the incremental scanner
(multi-frame zstd, damaged and truncated frames, cache reuse), the custom-rate
file, the `/th price` grammar and the scene's element tree.

Host-integration probe (boots a throwaway profile headlessly and checks whether
the host **accepts** the registrations — the layer unit tests cannot see):

```sh
node ../../tools/probe-plugin.mjs . --wait 15
```

The probe profile now mounts the `scenes`, `plugin-host`, `command-trees` and
`extensions` (which carries `tuiShortcuts`) rows too, so the scene, the four
commands and the `alt+h` shortcut are verified as well; a passing run logs
`history scene registered`, four `command registered` lines,
`command tree registered roots=4` and `shortcut registered alt+h`, and exits 0.

### Verifying the history numbers

The aggregation is pure and unit tested, but the *data* needs real logs. To
double-check on the same machine:

1. delete `~/.dsh-tui/dsh-peak-balance-history.json` so the next `/th` rescans
   everything;
2. fold the same bytes with an **independent implementation** (one that does not
   import this package) and compare the per-day and per-model figures;
3. remember the logs are **live files**: totals grow while the tool runs, so two
   snapshots never match — only agreement on the same batch of bytes means
   anything.

That is how this release was checked: 341 logs, 116 `(model, day, tier)` buckets,
**zero disagreements** between the two implementations, plus zero duplicate seq
numbers, zero out-of-order seq numbers and zero malformed JSONL lines.

### Previewing the peak-hour warning

The warning frame only appears inside a real peak window (Mon-Fri
`09:00-12:00` / `14:00-18:00` Beijing). To preview it at any hour:

```sh
DSH_PEAK_BALANCE_FORCE_PEAK=1 dsh --profile dsh-tui   # PowerShell: $env:DSH_PEAK_BALANCE_FORCE_PEAK=1
```

The override changes presentation only — the countdown still describes the real
clock — and it is off unless the variable is set to `1`/`true`/`yes`/`on`.

### Diagnostics

The plugin keeps a bounded lifecycle log at `~/.dsh-tui/dsh-peak-balance.log`:
one line when the module is imported, one when `apply()` starts (with pid and
the file path it was loaded from), the resolved config, which host seams were
mountable, the outcome of every registration, and teardown. That is enough to
tell "the host never loaded the file" apart from "a seam refused" without
attaching a debugger to a running TUI. The file trims itself to its newest half
once it passes 128 KiB, and `DSH_TUI_DEBUG=1` adds the per-refresh detail. Test
runs never touch it.

The focused conversation comes from two independent sources, in this order:

1. the host-mediated `tui/session-switched` DecisionEvents notification, used
   when the host mounts its plugin-interop row (`host=1` in the log). The
   manifest requires that contract as **optional** with its fallback spelled
   out, so a host without it degrades instead of refusing admission;
2. the launcher marker the host rewrites on every switch
   (`~/.dsh-tui/resume.txt`), polled once a second. The host EMPTIES that marker
   to start a fresh conversation (`/new`) — a statement rather than silence: the
   line gives up the figure you were reading, and the first conversation that is
   not the one left behind claims it. Only a marker that cannot be read at all
   falls back to the most recent session event.

`DSH_PEAK_BALANCE_FOCUS_FILE` overrides the marker path — meant for tests and
diagnostics, so a test run never reads a real marker.

## Notes for plugin authors

Host behaviours that cost real debugging time here, and are easy to hit:

- **A Cordis entry must export only `name`, `Config` and `apply`.** Exporting
  helpers from the same module changes how the loader wraps the activation, and
  every `tuiStatus` / `tuiSettingsSections` registration from that activation is
  then rejected with `requires a live Cordis activation context`. The failure is
  partial and quiet: the settings *namespace* still registers, so the plugin
  looks half-alive while the settings card and the status line never appear.
  Keep the implementation in a sibling module and re-export the three symbols.
- **Resolve optional host services strictly first** (`ctx.get(name)`); the
  non-strict `ctx.get(name, false)` can hand back a shadow placeholder whose
  method calls the host refuses. Keep the non-strict form only as a fallback,
  and keep retrying — the seam rows may still be activating on the first tick.
- **Mediated command registration needs a verified component identity**, which a
  plain profile row never gets: `ctx.tuiPluginHost.registerCommand` throws
  `the calling activation has no verified dsh-plugin.json Component identity`.
  Declare `commands.dsh/v1alpha1#Command` and the contribution id honestly in the
  manifest anyway, but be ready to fall back to `ctx.commands.register` — without
  it the command silently disappears.
- **A plugin command name must not be a prefix of a built-in command.** The
  slash-completion overlay owns Enter while it is open and runs the HIGHLIGHTED
  suggestion, and built-ins come first in the merged list — so `/th` loses Enter
  to `/theme`. Pick a non-colliding name (`/hist`) or bind a shortcut
  (`ctx.tuiShortcuts`; ctrl/alt required, reserved combos refused).
- **Scene hooks must be called unconditionally and in a stable order.** A
  well-meaning "only call `ui.useTheme` if it exists" changes the hook order and
  real React throws an invalid-hook-call. Read the hooks out first (with
  default-returning stubs) and call them every render.
- **A full-screen scene must budget its own rows and columns.** In the alternate
  screen an overflow does not get clipped — it pushes the whole frame. Ask "how
  many rows are left" before drawing each section, and compute the columns you
  can actually fit instead of hoping the host truncates.

This plugin writes what it learned to `~/.dsh-tui/dsh-peak-balance.log`, which
is how these were found; see *Diagnostics* above.

## Listing

This plugin is listed on the dsh-tui plugin market. Market listings are a link
directory only; they are not a code review and do not imply endorsement.

## License

MIT — see [LICENSE](LICENSE).