llm-echo 0.5 更新：模拟 token 用量计入工具调用与推理 token

llm-echo 0.5

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Simon Willison 更新了 llm-echo 调试插件至 0.5 版本，其模拟 token 用量统计现在会把工具调用、系统提示词和推理 token 计入。该插件提供一个不涉及 LLM 的 "model"，只回显输入的提示词，示例中一次调用显示 2 个输入 token、24 个输出 token。

正文 · 原文

I'm working towards a new LLM release, and testing PRs caused me to revisit the llm-echo debug plugin. This plugin provides a "model" which doesn't involve an LLM at all - it just repeats back the prompts that have been fed to it. The new release now updates the simulated token usage counts to take tool calls, system prompts, and reasoning tokens into account.

Example usage:

uvx --with llm-echo llm -m echo 'hi there' -o thinking 1 --usage

Outputs:

First I consider the prompt, then I decide what to say.
{
  "prompt": "hi there",
  "system": "",
  "attachments": [],
  "stream": true,
  "previous": []
}
Token usage: 2 input, 24 output

来源：Simon Willison · simonwillison.net