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https://github.com/deepseek-ai/deepseek-harness
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51 lines
2.0 KiB
Markdown
51 lines
2.0 KiB
Markdown
<!-- Generated by scripts/gen-website-api.ts — do not edit by hand. Run `pnpm run gen-website-api` to regenerate. -->
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# ctx.tokenMeter
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`TokenMeterService` — provided by `@deepseek-ai/dsh-token-meter`.
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Replay owner for one service-wide estimator and isolated per-session folds.
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[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/llm/token-meter/src/index.ts#L106)
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### ctx.tokenMeter.contextWindow
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```ts website-api
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readonly contextWindow: number
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```
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Provider context-window capacity used by pressure consumers.
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[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/llm/token-meter/src/index.ts#L112)
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### ctx.tokenMeter.measure(session, requestHeader?)
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```ts website-api
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measure(session: Session, requestHeader?: EpochHeader): TokenMeasurement
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```
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Measure current request pressure and surface through the durable tail.
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Provider usage is reused only when the latest successful call's canonical request envelope matches `requestHeader` and its total is no lower than that call's full heuristic anchor; otherwise the complete envelope and surface are heuristically repriced.
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`requestHeader` affects request pressure only; surface fields always describe the current session surface. Every call clones those positional nodes, so measurement is O(surface).
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- `session` — session to replay through its current durable tail.
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- `requestHeader` — optional effective request envelope replacing the latest logged header.
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**Returns** a detached deeply immutable pressure and surface measurement.
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[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/llm/token-meter/src/index.ts#L143)
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### ctx.tokenMeter.estimateMessage(message)
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```ts website-api
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estimateMessage(message: Message): number
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```
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Heuristically price one model-visible message.
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- `message` — message to price without mutation.
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**Returns** content and role-framing tokens under the fixed service heuristic.
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[Source](https://github.com/deepseek-harness/deepseek-harness/blob/master/packages/llm/token-meter/src/index.ts#L181)
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