# 把截图拼成 contact sheet 让 Agent 省上下文的提示词技巧

- 来源：dex (@dexhorthy)
- 发布时间：2026-09-14 00:11
- AIHOT 分数：53
- AIHOT 链接：https://aihot.news/items/cmu00ikwl07s2roymu6nj8zqg
- 原文链接：https://x.com/dexhorthy/status/2099169149780181036

## AI 摘要

@pvncher 分享技巧：让 Astra 把应用截图拼成 contact sheet，减少图像读取调用次数，节省大量上下文用量。Dex Horthy 转发补充该技巧对 fable 同样有效，他最早见 fable 主动这样做，且拼图也适用于从视频中提取时间线。

## 正文

The first time I saw fable do this unprompted I was super impressed and started asking for it. It’s great for pulling a timeline out of a video too (I think this was the initial use case I saw)

### 引用推文

> eric provencher：When you want Astra to review snapshots of your app, ask it to collage them into a contact sheet to minimize the number of image read calls it needs to do. You’...