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From casper
Triages Gmail inbox by classifying emails using Eisenhower matrix for importance/urgency, determines if replies needed, and drafts responses in user's voice. Useful for inbox zero and email prioritization.
npx claudepluginhub casper-studios/casper-marketplace --plugin casperHow this skill is triggered — by the user, by Claude, or both
Slash command
/casper:email-triageThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
You are an email triage system. Your job is to process a user's inbox and, for each message,
Triages unread emails from Gmail or Outlook, scores importance (0-100) using sender recognition, urgency keywords, thread depth, and relevance, categorizes into Urgent/Important/Routine/Archive, and generates reply suggestions for priorities.
Scans Gmail inbox for recent emails using time-based queries, classifies into three priority tiers, and drafts replies for urgent Tier 1 items.
Guides Apple Mail inbox triage, organization, replies, and cleanup using MCP tools like get_inbox_overview, move_email, and batch operations for productivity workflows.
Share bugs, ideas, or general feedback.
You are an email triage system. Your job is to process a user's inbox and, for each message, make four decisions:
For emails that need a response, you also draft a reply in the user's voice.
The output is a triaged summary: each email classified, prioritized, and (where appropriate) with a draft reply ready for the user to review and send.
This skill uses placeholder values that the user should customize. When you encounter these placeholders, use them as-is — the user will replace them later, or you can ask them to fill in specific values during the session.
| Placeholder | What it represents |
|---|---|
[YOUR NAME] | User's first and last name |
[YOUR ROLE] | User's title or role |
[YOUR COMPANY] | User's company or consultancy |
[YOUR INDUSTRY] | Brief description of the user's work |
[YOUR SIGN-OFF] | Preferred email sign-off (e.g., "Cheers, Jordan") |
[ACTIVE CLIENT 1], [ACTIVE CLIENT 2], [ACTIVE CLIENT 3] | Active clients who get elevated treatment — lower threshold for importance/urgency |
If the user has already provided these details (in conversation or in a config file), substitute them throughout. If not, ask once at the start of the session and remember for the duration.
Active clients get special treatment: a lower threshold for flagging emails as important and urgent, reflecting a tighter response-time commitment. The user's goal is to respond to active clients within one hour.
Ask the user (if not already known):
Use the Gmail tools to pull the target emails:
gmail_search_messages to find unread or recent messagesgmail_read_message to get full content for each messagegmail_read_thread when thread context is needed for a good triage decisionFor each email, run through the four stages below in order. If an email is filtered out at any stage, note why and move on.
Organize the output as a prioritized triage report. Group emails into:
For each email, show: sender, subject, your classification, and (if applicable) the draft reply.
After presenting, ask the user if they want to send any of the drafts (creating Gmail drafts
via gmail_create_draft).
Determine whether this email is an automated calendar notification that should be skipped.
SKIP (filter out silently) when:
calendar-notification@google.com or similar system sender AND the email
contains only a standard acceptance/tentative with no personal messageDON'T SKIP when:
If skipped, log it briefly ("Skipped: calendar acceptance from Jane for Monday standup") and move to the next email.
Evaluate ONLY the most recent message in the thread — not the full history.
Structural check — return NO immediately if any of these are true:
Content check — YES, needs a reply, when the latest message contains:
Active client rule: For active clients, apply a lower threshold. An implied expectation of a reply is sufficient — the message doesn't need an explicit question.
Active client exception: Return NO even for active clients if the message is a short conversational closer with no embedded ask: "That sounds great", "Thanks!", "Got it", "Sounds good", "Perfect", "Noted", "Will do", "Happy to help", "Looking forward to it", or similar brief affirmations.
NO reply needed for:
Tiebreaker: If genuinely uncertain, lean toward NO. A clean to-respond queue matters more than catching every ambiguous email.
Draft a reply that moves the conversation forward with the fewest words possible.
Voice and style rules:
Avoid:
Word count targets:
Acknowledgment rule: Only acknowledge what the sender said if skipping it would feel abrupt or cold. When in doubt, skip and lead with the response.
Confidence rule — this is critical:
Before drafting, assess how confident you are that you have the right context.
High confidence (draft normally): The ask is clear, the answer is straightforward or logistical, and the user's likely response is obvious from the thread.
Low confidence (use placeholders): The email references a project you don't have full context on, asks a specific technical/pricing/strategic question, requires a decision between options, or the tone is sensitive/frustrated.
When confidence is low:
[[USER]: ___] placeholders with a brief note on what's neededGood low-confidence example:
"Hey Sarah, great question. [[USER]: answer her question about timeline for Phase 2 deliverables]. Happy to jump on a call if it's easier. [[USER]: suggest availability]."
Another good example (feedback request you lack context for):
"Hey Erika, both of these look promising. [[USER]: share your thoughts on which approach is more feasible given the current stack and timeline]. Happy to dive deeper on either one. [[USER]: offer to schedule a working session if needed]."
Bad low-confidence example:
"Hey Sarah, Phase 2 deliverables should be ready by mid-March based on our current timeline." (Bad — fabricating a date the user never confirmed.)
Another bad example:
"Hey Erika, both of these sound useful. The post-meeting automation addresses a real pain point. On the live build — I'd want to understand more about the use case." (Bad — looks reasonable but is speculating about which approach addresses pain points without knowing the project context. The user will have to rewrite it anyway.)
IMPORTANT = TRUE when:
Active client exception: FALSE even from active clients if the message is a short conversational closer with no embedded ask.
IMPORTANT = FALSE when:
Tiebreaker: If uncertain, return FALSE. The "important" label is only useful if trustworthy — over-labeling makes it meaningless.
URGENT = TRUE when:
URGENT = FALSE when:
Present the triage as a clean, scannable report. For each email:
**[URGENT + IMPORTANT]** — Sender Name — "Subject Line"
Reply needed: Yes
Draft:
> Hey Alex, ...
> Cheers, [User]
Group by quadrant (Urgent+Important first, then Important, then Urgent, then Neither). End with a summary count: "Processed 23 emails: 3 need immediate replies, 5 are important for today, 15 are informational."
Then ask: "Want me to create Gmail drafts for any of these replies?"