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Email Composer

Community
ynulihao
Email Composer

Draft professional emails for various contexts including business, technical, and customer communication. Use when the user needs help writing emails or composing professional messages.

Overview

Publisherynulihao
RepositoryAgentSkillOS
Skill nameEmail Composer
Stars
612
Forks
76
Bundled files
Instructions only
Links
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • Self-contained

    Everything the model needs lives in the instructions — no extra files to sync.

  • Open source

    Published by ynulihao on GitHub. Read the source before you install it.

Installation

Install the Email Composer AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/ynulihao/AgentSkillOS.git /tmp/AgentSkillOS
mkdir -p .claude/skills
cp -r /tmp/AgentSkillOS/data/skill_seeds/email-composer .claude/skills/ynulihao-email-composer
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Email Composer in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Email Composer on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Email Composer is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Email Composer

Quick start

Provide context and purpose, and I'll draft an appropriate email.

What I need:

  • Purpose of email (request, follow-up, announcement, etc.)
  • Recipient relationship (colleague, customer, manager, vendor)
  • Key points to include
  • Desired tone (formal, casual, urgent, friendly)

Email structure

Standard professional email format:

Subject: [Clear, specific subject line]

[Greeting],

[Opening - context/purpose]

[Body - main points]

[Closing - call to action]

[Sign-off]
[Your name]

Common email types

Request for information

Subject: Question about Q4 project timeline

Hi [Name],

I hope this email finds you well. I'm reaching out regarding the Q4 product launch timeline.

Could you provide an update on:
- Current progress on feature development
- Expected completion date for testing phase
- Any blockers or dependencies we should be aware of

This will help us coordinate with the marketing team for the launch materials.

Thanks in advance for your help!

Best regards,
[Your name]

Follow-up email

Subject: Following up: Proposal for new payment system

Hi [Name],

I wanted to follow up on the payment system proposal I sent last week. I understand you're busy, so I wanted to make sure it didn't get lost in your inbox.

To recap, the proposed system would:
- Reduce transaction fees by 30%
- Integrate with existing accounting software
- Improve customer checkout experience

I'd be happy to schedule a brief call to discuss any questions you might have.

Looking forward to hearing from you.

Best,
[Your name]

Technical update

Subject: API Maintenance Window - [Date]

Team,

This is a reminder that we'll be performing scheduled maintenance on our API infrastructure on [Date] from [Time] to [Time] [Timezone].

During this window:
- API endpoints will be unavailable
- Database will be upgraded to v14
- SSL certificates will be renewed

Expected downtime: 2 hours

What you need to do:
- Notify your users of the planned downtime
- Ensure retry logic is in place for API calls
- Monitor your application after maintenance completes

If you have any concerns or conflicts with this schedule, please let me know by [Date].

Technical details available in our status page: [link]

Thanks,
[Your name]

Customer support

Subject: Re: Issue with order #12345

Hi [Customer name],

Thank you for reaching out about your order. I'm sorry to hear you're experiencing this issue.

I've looked into your order (#12345) and found the following:

[Explanation of the issue]

To resolve this, I've:
- [Action taken 1]
- [Action taken 2]

You should see [expected outcome] within [timeframe].

If you continue to experience any problems, please don't hesitate to reply to this email or call us at [phone number].

We appreciate your patience and understanding.

Best regards,
[Your name]
Customer Support Team

Meeting request

Subject: Meeting request: Discuss database migration strategy

Hi [Name],

I'd like to schedule a meeting to discuss our approach for the upcoming database migration.

Agenda items:
- Review migration timeline and milestones
- Discuss rollback strategy
- Identify potential risks and mitigation plans
- Assign team responsibilities

Estimated duration: 45 minutes

I'm available:
- Monday 2-4 PM
- Wednesday 10 AM - 12 PM
- Friday 1-3 PM

Please let me know what works best for you, or feel free to suggest alternative times.

Best,
[Your name]

Tone guidelines

Formal tone

  • Use complete sentences
  • Avoid contractions
  • Professional language
  • Proper titles (Dr., Mr., Ms.)

Casual tone

  • Contractions acceptable
  • Conversational language
  • Still professional
  • First names

Urgent tone

  • Clear subject line with [URGENT] or [ACTION REQUIRED]
  • Bold key points
  • Explicit deadline
  • Direct call to action

Subject line best practices

Good subject lines:

  • "Action required: Submit timesheet by Friday"
  • "Q4 Sales Report - Review needed"
  • "Meeting rescheduled: Project kickoff now Thursday"
  • "Quick question about deployment process"

Bad subject lines:

  • "Update"
  • "Question"
  • "Hello"
  • "Following up"

Email etiquette

DO:

  • Respond within 24 hours (even if just to acknowledge)
  • Use clear, specific subject lines
  • Keep it concise
  • Proofread before sending
  • Include relevant context
  • Use bullet points for multiple items
  • End with clear call to action

DON'T:

  • Use ALL CAPS
  • Over-use exclamation marks!!!
  • Mark everything as urgent
  • Reply all unless necessary
  • Send when emotional
  • Include unnecessary recipients
  • Forget attachments mentioned in email

Templates by scenario

Decline request politely

Subject: Re: [Original subject]

Hi [Name],

Thank you for thinking of me for [request/opportunity].

Unfortunately, I won't be able to [participate/help/attend] due to [brief reason - optional]. However, I'd recommend [alternative suggestion if applicable].

I appreciate your understanding, and I hope we can collaborate on future opportunities.

Best regards,
[Your name]

Apologize for mistake

Subject: Apology and correction: [Issue]

Hi [Name],

I'm writing to apologize for [specific mistake]. This was an error on my part, and I take full responsibility.

To correct this:
- [Action 1 already taken]
- [Action 2 in progress]
- [Preventive measure for future]

I understand this may have caused [impact], and I'm committed to ensuring it doesn't happen again.

If you have any concerns or questions, please don't hesitate to reach out.

Sincerely,
[Your name]

Share good news

Subject: Great news: [Achievement/milestone]

Team,

I'm excited to share that we've [accomplished goal]!

This success is thanks to:
- [Team/person contribution 1]
- [Team/person contribution 2]

Impact:
- [Metric improvement]
- [Business benefit]

Thank you all for your hard work and dedication. Let's keep up the momentum!

Cheers,
[Your name]

Closing phrases by context

Formal:

  • Sincerely
  • Best regards
  • Respectfully
  • Cordially

Professional:

  • Best
  • Thanks
  • Kind regards
  • Regards

Casual:

  • Cheers
  • Thanks!
  • Talk soon
  • Best

Email composition checklist

  • Clear, specific subject line
  • Appropriate greeting
  • Purpose stated upfront
  • Key points organized with bullets/numbers
  • Clear call to action or next steps
  • Appropriate tone for audience
  • Proofread for typos
  • Attachments included (if mentioned)
  • Recipients correct (To, CC, BCC)
  • Professional signature

Frequently asked questions

What does the Email Composer AI skill do?

Draft professional emails for various contexts including business, technical, and customer communication. Use when the user needs help writing emails or composing professional messages.

Why use Email Composer on TypingMind?

Because you install it once and use it with any model. Email Composer is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Email Composer in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/ynulihao/AgentSkillOS/tree/main/data/skill_seeds/email-composer. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Email Composer?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Email Composer?

As many as you like. As long as a model supports skills, you can use Email Composer with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Email Composer AI skill free?

It is published on GitHub by ynulihao. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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