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https://github.com/DayuanJiang/next-ai-draw-io.git
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622829b903
* feat: add daily token limit with actual usage tracking - Add DAILY_TOKEN_LIMIT env var for configurable daily token limit - Track actual tokens from Bedrock API response metadata (not estimates) - Server sends inputTokens + cachedInputTokens + outputTokens via messageMetadata - Client increments token count in onFinish callback with actual usage - Add NaN guards to prevent corrupted localStorage values - Add token limit toast notification with quota display - Remove client-side token estimation (was blocking legitimate requests) - Switch to js-tiktoken for client compatibility (pure JS, no WASM) * feat: add TPM (tokens per minute) rate limiting - Add 50k tokens/min client-side rate limit - Track tokens per minute with automatic minute rollover - Check TPM limit after daily limits pass - Show toast when rate limit reached - NaN guards for localStorage values * feat: make TPM limit configurable via TPM_LIMIT env var * chore: restore cache debug logs * fix: prevent race condition in TPM tracking checkTPMLimit was resetting TPM count to 0 when checking, which overwrote the count saved by incrementTPMCount. Now checkTPMLimit only reads and incrementTPMCount handles all writes. * chore: improve TPM limit error message clarity
40 lines
1.1 KiB
TypeScript
40 lines
1.1 KiB
TypeScript
/**
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* Token counting utilities using js-tiktoken
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*
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* Uses cl100k_base encoding (GPT-4) which is close to Claude's tokenization.
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* This is a pure JavaScript implementation, no WASM required.
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*/
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import { encodingForModel } from "js-tiktoken"
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import { DEFAULT_SYSTEM_PROMPT, EXTENDED_SYSTEM_PROMPT } from "./system-prompts"
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const encoder = encodingForModel("gpt-4o")
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/**
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* Count the number of tokens in a text string
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* @param text - The text to count tokens for
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* @returns The number of tokens
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*/
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export function countTextTokens(text: string): number {
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return encoder.encode(text).length
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}
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/**
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* Get token counts for the system prompts
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* Useful for debugging and optimizing prompt sizes
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* @returns Object with token counts for default and extended prompts
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*/
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export function getSystemPromptTokenCounts(): {
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default: number
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extended: number
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additions: number
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} {
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const defaultTokens = countTextTokens(DEFAULT_SYSTEM_PROMPT)
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const extendedTokens = countTextTokens(EXTENDED_SYSTEM_PROMPT)
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return {
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default: defaultTokens,
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extended: extendedTokens,
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additions: extendedTokens - defaultTokens,
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}
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}
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