← AI for Email
Lesson 3

Summarizing Long Threads

You've been added to an email thread that started three weeks ago. There are 34 replies. You need to know what's going on before your 3pm call. AI can read the whole thing in seconds.

The Thread Summary Prompt

Copy the entire email thread and use this prompt:

Below is an email thread. Please summarize: (1) what the main issue is, (2) what decisions have been made, (3) what's still unresolved, and (4) what action is expected from me.

You'll have a clear picture of the situation in under 30 seconds, even if the thread is 5,000 words long.

When to Use Thread Summaries

  • You've been cc'd on something that doesn't involve you directly
  • You're returning from vacation with a backlog
  • You need to brief someone else on a situation quickly
  • You want to check if you missed any action items before archiving

Extracting Action Items

After the summary, ask: List only the action items. Format as a checklist. Mark which ones are assigned to me if my name is [Your Name].

This turns a messy thread into a clean to-do list, instantly.

Privacy Note

If the email contains sensitive client or company information, use a private/enterprise AI tool (like ChatGPT Enterprise, or your company's approved tool) rather than a free consumer version. When in doubt, describe the situation without pasting actual names or numbers.

Practice

Exercise 1

Describe a type of email thread you regularly struggle to keep up with. Write a custom summary prompt that would give you exactly what you need — no more, no less.

💡 Think about what the "output" should look like. Bullet points? A short paragraph? A decision log?
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