--- url: >- https://adk.nht.io/api/@nhtio/adk/batteries/llm/transformers_js/helpers/interfaces/BatteryLifecycleReport.md description: A single normalized lifecycle report. --- # Interface: BatteryLifecycleReport Defined in: [src/batteries/llm/chat\_common/lifecycle.ts:44](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L44) A single normalized lifecycle report. ## Properties | Property | Type | Description | Defined in | | -------------------------------------------- | ----------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------- | | `at` | `string` | ISO-8601 timestamp stamped when the report was emitted. | [src/batteries/llm/chat\_common/lifecycle.ts:52](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L52) | | `battery` | [`BatteryLifecycleBattery`](../type-aliases/BatteryLifecycleBattery.md) | The battery that produced this report. | [src/batteries/llm/chat\_common/lifecycle.ts:48](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L48) | | `detail?` | `string` | Human-readable detail, e.g. `'booting WebGPU runtime'`. | [src/batteries/llm/chat\_common/lifecycle.ts:54](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L54) | | `error?` | `unknown` | The failure, populated only when `phase === 'error'`. | [src/batteries/llm/chat\_common/lifecycle.ts:60](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L60) | | `gpuBudget?` | [`GpuBudget`](GpuBudget.md) | The probed WebGPU device budget, populated on the `ready` phase for on-device batteries running on the WebGPU EP. SURFACED, not enforced — the consumer reads this to know the per-allocation ceiling (the wall an over-large context window hits) and choose its window accordingly. Absent on non-WebGPU runtimes (Node/wasm) and on every other phase. See [GpuBudget](GpuBudget.md). | [src/batteries/llm/chat\_common/lifecycle.ts:67](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L67) | | `model` | `string` | Best-effort model identifier (the `model` option; `''` / `''` when not a string). | [src/batteries/llm/chat\_common/lifecycle.ts:50](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L50) | | `phase` | [`BatteryLifecyclePhase`](../type-aliases/BatteryLifecyclePhase.md) | The phase being entered. | [src/batteries/llm/chat\_common/lifecycle.ts:46](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L46) | | `progress?` | `number` | Normalized download/load progress in `0..1`, when the provider reports it (the `loading` phase). | [src/batteries/llm/chat\_common/lifecycle.ts:56](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L56) | | `raw?` | `unknown` | The provider's own progress payload, passed through verbatim (the `loading` phase). | [src/batteries/llm/chat\_common/lifecycle.ts:58](https://github.com/NHTIO/ADK/blob/v1.20260713.1/src/src/batteries/llm/chat_common/lifecycle.ts#L58) |