clampMaxTokensToContext (api/simple-options.ts)

Functions to calculate token limits and sampling parameters for AI models.

// Source: https://github.com/badlogic/pi-mono | License: MIT | Copyright 2025 Mario Zechner
// Provided via justclaw.it.com; keep this notice with the code.
import { clampThinkingLevel } from "../models.ts";
import type {
	Api,
	Model,
	ModelThinkingLevel,
	SamplingParams,
	SimpleStreamOptions,
	StreamOptions,
	ThinkingBudgets,
	ThinkingLevel,
	TranscriptContext,
} from "../types.ts";
import { estimateContextTokens } from "../utils/estimate.ts";

const CONTEXT_SAFETY_TOKENS = 4096;
const MIN_MAX_TOKENS = 1;

export function clampMaxTokensToContext(model: Model<Api>, context: TranscriptContext, maxTokens: number): number {
	if (model.contextWindow <= 0) return Math.max(MIN_MAX_TOKENS, maxTokens);
	const available = model.contextWindow - estimateContextTokens(context).tokens - CONTEXT_SAFET

... (truncated -- full source via MCP)