Function: resolveBudget()

function resolveBudget(
  contextWindow: number,
  outputReserve?: number,
  reserveFraction?: number,
): number;

Defined in: src/batteries/context/thrift/subtractive_pass.ts:338

Resolve the per-dispatch INPUT token budget from the ACTIVE model's window: the window minus the room held back for the model's own output. The same call works for a 4K model and a 1M model.

Parameters

Parameter	Type	Default value	Description
contextWindow	number	undefined	The active model's context window (input + output share it).
outputReserve?	number	undefined	The EXACT number of tokens to hold back for output — pass the generation maxTokens the model is configured with. When omitted, falls back to reserveFraction of the window (a guess, for callers that don't know the cap). Clamped so the reserve never exceeds the window.
reserveFraction?	number	DEFAULT_RESERVE_FRACTION	The fallback fraction used when outputReserve is omitted. Default: DEFAULT_RESERVE_FRACTION.

Returns

number