Prompting Guide
How to Prompt Claude to Triage Your Inbox
Not every unread message deserves the same five minutes.
Anthropic's Claude can look at a pile of email subject lines and first lines and tell you, in order, which ones need a reply today, which can wait until next week, and which don't need anything from you at all. What it can't do is read your actual inbox on its own: you have to paste the material in, and the prompt you use decides whether the sort it gives back is actually useful or just a reshuffled version of the same overwhelming pile.
To prompt Claude to triage your inbox, paste in the subject lines and opening lines (or full text) of your unread messages, and ask it to sort them into groups like Reply Today, Can Wait, and No Action Needed, with one line explaining why each one landed where it did. Give it context on what counts as urgent for you specifically, like anything from your manager or a client with a deadline, since Claude has no way to know your priorities unless you say them.
Published
Free lesson · no account neededMeet ClaudeWhy Claude?6 minStart the free lessonTry it with your own inboxPaste in your unread subject lines and get a sorted list back in seconds, free, no account needed.Try it freeKey Takeaways
- Paste in subject lines and opening lines at minimum; full message text if the sender or subject alone doesn't make the urgency clear.
- Tell Claude what counts as urgent for you specifically. "Anything from my manager or a client" is a rule Claude can apply; "important stuff" is not.
- Ask for a one-line reason next to each sorted email, not just the sort itself, so you can sanity check the triage instead of trusting it blindly.
- A triage pass should group and prioritize, not draft replies. Keep those as two separate steps so a bad reply doesn't slip out because it rode along with a good sort.
- Spot-check the Reply Today group against your own instinct before you start working through it. If something you know is urgent landed in the wrong group, say so and ask Claude to redo the sort with that correction.
Copy and Paste
Prompts You Can Use Today
Sorting a full inbox into three groups
Here are the subject lines and first lines of everything unread in my inbox: [paste the list]. Sort them into three groups: Reply Today, Can Wait Until Later This Week, and No Action Needed. For each email, give a one-line reason for where you put it. Treat anything from my manager, [names of key people], or a client with a stated deadline as automatically Reply Today.
Replace the bracketed names with the specific people whose messages you always want flagged as urgent.
Finding the one email that actually needs you today
Out of these unread emails, which single one is most likely to cause a real problem if I don't respond today: [paste the list]. Explain your reasoning in one or two sentences. Don't sort the rest; just tell me the one that matters most right now.
Useful when you have five minutes before a meeting and need the single highest-priority item, not a full sort.
Triaging with your own definition of urgent
Sort these emails by urgency, but use my definition of urgent, not a general one: anything involving money, anything from a client, and anything where someone is waiting on me to unblock their work. Everything else, including internal FYIs and newsletters, goes in a low-priority group: [paste the list].
Good for inboxes where the default sense of 'urgent' doesn't match what actually matters in your specific role.
Double-checking a triage sort against your own judgment
I sorted these emails myself into Reply Today, Can Wait, and No Action, like this: [paste your own sort]. Here are the original emails again: [paste them]. Tell me if there's anything you'd move to a different group, and why, based only on the content of the emails, not on any priorities I haven't told you about.
Run this as a second opinion on your own triage, especially on a day with an unusually full inbox.
Clearing out everything that needs no action at all
Of these unread emails, which ones can I archive right now with zero risk because they need no reply and no decision from me, like automated notifications, FYIs, or threads that already resolved: [paste the list]. List only those, with a one-line reason for each, so I can check before I archive.
A narrower, lower-risk pass than a full triage: it only picks out the emails that are safe to clear, nothing else.
The Structure
The four parts of a prompt that actually triages, instead of just re-listing
Inbox triage follows the same pattern as any other prompt: context, task, format, and a check before you trust the sort.
Context: what counts as urgent for you
Claude has no idea who your manager is or which client relationships carry weight unless you say so. Name the senders, roles, or situations that should always count as urgent, and treat everything else as negotiable.
Task: sort and prioritize, not draft replies
Triage and reply-drafting are two different jobs. Ask for one at a time. Mixing them risks a reply slipping out that you didn't carefully review, because it rode along with a sort you trusted more.
Format: named groups with a reason attached
Ask for groups like Reply Today, Can Wait, and No Action Needed, and a one-line reason for each email's placement. The reason is what makes the sort checkable instead of a black box you either trust completely or ignore.
Checking: spot-check before you act on it
Before working through the Reply Today list, scan it against your own instinct for anything that looks off. A triage you don't check at all defeats the point of triage, which is to focus your attention, not redirect it somewhere wrong.
Before And After
What changes when you define urgency yourself
The prompt most people start with is "sort my inbox by priority," with a list of emails pasted below. Claude will make a reasonable attempt using general signals, like whether an email mentions a deadline or comes from outside the company, but general signals miss anything specific to your actual job: the client who always needs a same-day reply even when their emails sound casual, or the internal mailing list that looks urgent but never actually is.
The same request, rewritten: "Sort these emails into Reply Today, Can Wait, and No Action Needed, with a one-line reason for each. Treat anything from my manager, [specific names], or a client with a stated deadline as automatically Reply Today." The content being sorted hasn't changed, but the rule Claude is applying now matches your actual priorities instead of a generic guess at what priorities might look like.
The one-line reason attached to each email is doing more work than it looks like. Without it, a triage result is just a reordered list you either trust or don't. With it, you can scan the reasons in a few seconds and catch the one email that got filed as low-priority for a reason that doesn't actually apply to your situation, before you act on a sort that's wrong in one specific spot.
Common Mistakes
What makes an inbox triage less useful than it should be
These are the gaps that turn a triage pass into one more thing to double-check from scratch.
Not defining urgency for your specific job
A generic sense of "important" misses the client who sounds casual but needs a same-day answer, and flags the internal thread that looks formal but genuinely isn't urgent. Say what urgent means for you, specifically.
Asking for sorting and replies in one step
A combined prompt can produce a drafted reply to an email that actually needed more thought than a quick triage pass gives it. Keep sorting and drafting as separate requests so each gets the attention it needs.
Skipping the reason for each placement
A sort with no explanation is a black box: useful only if you're willing to trust it completely. A one-line reason per email turns the same sort into something you can actually verify in a few seconds.
Trusting the sort without a spot check
A triage pass is a strong starting point, not a guarantee. Scan the Reply Today group against your own sense of the day before diving in, since the cost of missing something genuinely urgent is higher than the cost of a thirty-second check.
Sourced From Anthropic
The one thing Anthropic's own guidance says to do differently
Anthropic's own documentation on prompting Claude points out that giving the model explicit rules, rather than leaving it to infer your intent from context alone, produces more consistent results on tasks with real judgment calls. Inbox triage is exactly that kind of task: whether an email is urgent often depends on who sent it and what your role requires, not on anything visible in the email's wording alone.
The practical takeaway is to write your urgency rules out as plainly as you can, the same way you might explain them to a new assistant on their first day: these specific people are always urgent, this category of email never is, and anything involving a dollar figure or a client deadline gets a second look. The more explicit the rule, the less Claude has to guess, and the less likely it is to guess wrong on the one email that actually matters.
Before You Act On It
What to check before you work through the sorted list
Scan the Reply Today group first, against your own sense of what's actually pressing today. If something you know is urgent landed in Can Wait, or vice versa, that's worth correcting before you start working through the list, not after you've already spent your morning on the wrong priorities.
Read the one-line reason attached to anything that surprises you. A reason that says "no deadline mentioned" for an email you know is time-sensitive tells you exactly where the sort went wrong: it had no way to know about a deadline that exists outside the email itself, like a verbal commitment made in a meeting.
If you're going to archive anything Claude flagged as No Action Needed, do a final skim of the subject lines first. A triage pass works from the text it was given; it has no way to catch an email that needs action for a reason that isn't visible in the subject or opening line alone.
When This Isn't The Right Tool
When to triage the inbox yourself instead
An inbox with genuinely sensitive material, like a legal matter, a personnel issue, or anything you wouldn't want summarized and sorted by a general-purpose assistant even in principle, is worth triaging yourself rather than pasting into a prompt at all, regardless of how convenient the shortcut would be.
On a day with very few unread messages, a triage prompt is often more overhead than it's worth. The tool earns its place on the day your inbox has eighty unread messages and ten minutes before your next meeting, not on a quiet Tuesday with six emails you can read yourself in the time it would take to write the prompt.
Triaging one inbox is the easy part
The harder skill is writing urgency rules that actually match your job, and knowing when a quick sort isn't the right tool at all. Nightschool AI's free lessons walk through real workplace tasks with Claude, not toy examples.
Frequently Asked Questions
What should I paste into the prompt when asking Claude to triage my inbox?
Subject lines and opening lines at minimum, or full message text when the sender and subject alone don't make the urgency clear. Claude can only sort what you actually give it.
How do I make sure Claude's sense of 'urgent' matches mine?
Spell it out explicitly: name the people, roles, or situations that should always count as urgent for you, rather than relying on a general sense of importance that may not match your specific job.
Should Claude draft replies during the same triage pass?
Keep sorting and reply-drafting as separate steps. Combining them risks a reply slipping through without the review it needed, because it was generated alongside a sort you trusted more readily.
Why should each sorted email have a reason attached?
A reason turns the sort into something you can check in seconds. Without one, you're left either trusting the whole triage blindly or re-reading every email yourself, which defeats the purpose of triage.
Is it safe to archive emails Claude sorts as No Action Needed?
Do a final skim of the subject lines first. The sort works from the text it was given, and it has no way to catch an email that needs action for a reason not visible in the subject or opening line, like a verbal commitment made elsewhere.
Can Claude triage a genuinely sensitive inbox, like one with legal or HR material?
That's worth handling yourself rather than pasting into any prompt, regardless of convenience. Reserve prompted triage for routine work email, not material you wouldn't want summarized by a general-purpose assistant.
How often should I spot-check a triage sort before trusting it?
Every time, at least briefly. Scan the Reply Today group against your own instinct before working through it, since the cost of missing a genuinely urgent email outweighs the cost of a short check.
Is inbox triage worth doing on a day with very few emails?
Usually not. The prompt earns its place when you have dozens of unread messages and limited time, not on a light day where reading each one yourself takes less time than writing the prompt would.
A clear inbox takes minutes with the right prompt
The sort is reusable every day. Defining what counts as urgent for you is the part worth getting right once.