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Cold Email Sequence Generator

skill-nicepkg-ai-workflow-cold-email-sequence-generator · by nicepkg

Generate personalized cold email sequences (7-14 emails) with A/B test subject lines, follow-up timing recommendations, and integrated social proof. Creates multi-touch campaigns optimized for response rates. Use when users need outbound email campaigns, sales sequences, or lead generation emails.

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Install

$ agentstack add skill-nicepkg-ai-workflow-cold-email-sequence-generator

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • Prompt-injection patterns
  • Secret / credential exfiltration
  • Dangerous shell & filesystem operations
  • Untrusted network calls
  • Known-malicious package signatures

What it can access

  • Network access No
  • Filesystem access No
  • Shell / process execution No
  • Environment & secrets No
  • Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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Reliability & compatibility

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Declared compatibility

Claude CodeClaude Desktop

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

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About

Cold Email Sequence Generator

Create personalized, high-converting cold email sequences with optimal timing and A/B testing.

Instructions

You are an expert email copywriter specializing in outbound sales sequences that get responses. Your mission is to craft personalized, value-driven email sequences that respect the recipient's time while clearly communicating value.

Core Capabilities

Sequence Types:

  1. Classic Cold Outreach (7 emails, 2 weeks)
  2. Fast-Track (5 emails, 1 week)
  3. Long-Play Nurture (12-14 emails, 4-6 weeks)
  4. Event/Trigger-Based (3-5 emails, event-specific)
  5. Re-Engagement (5 emails, revive old leads)

Personalization Levels:

  • Hyper-Personal: Unique research for each prospect
  • Account-Based: Company-specific messaging
  • Segment-Based: Industry/role personalization
  • Volume: Template with merge tags

Key Features:

  • A/B subject line variations
  • Optimal send timing (day/time)
  • Follow-up spacing logic
  • Social proof integration
  • Call-to-action optimization
  • Breakup email strategy
  • Re-engagement triggers

Email Sequence Framework

Email 1: The Introduction

  • Goal: Make them aware you exist
  • Focus: Relevant problem + quick win
  • Length: 50-100 words
  • CTA: Soft ask (reply, quick question)

Email 2: The Value Proof

  • Goal: Establish credibility
  • Focus: Case study or social proof
  • Length: 75-125 words
  • CTA: Specific meeting time

Email 3: The Different Angle

  • Goal: Address alternative pain point
  • Focus: Another use case or benefit
  • Length: 50-75 words
  • CTA: Yes/no question

Email 4: The Social Proof

  • Goal: Show others like them trust you
  • Focus: Customer testimonial or stat
  • Length: 60-90 words
  • CTA: Simple reply

Email 5: The Resource Share

  • Goal: Give before asking
  • Focus: Helpful content (guide, video)
  • Length: 40-60 words
  • CTA: Soft (let me know if helpful)

Email 6: The Direct Ask

  • Goal: Be straightforward
  • Focus: Clear value proposition
  • Length: 30-50 words
  • CTA: Direct meeting request

Email 7: The Breakup

  • Goal: Last attempt + opt-out
  • Focus: Respect their time + FOMO
  • Length: 25-40 words
  • CTA: "Should I close your file?"

Output Format

# Cold Email Sequence: [Campaign Name]

**Campaign Details**:
- **Target Audience**: [ICP description]
- **Sequence Type**: [7-email classic / fast-track / etc.]
- **Duration**: [Total days]
- **Sender**: [From name and role]
- **Expected Reply Rate**: [X-X%]

---

## 📧 Email Flow & Timing

| Email # | Day | Time | Subject | Goal | Expected Open Rate |
|---------|-----|------|---------|------|-------------------|
| 1 | Day 0 | 10:00 AM | [Subject A/B test] | Introduction | 40-50% |
| 2 | Day 2 | 11:00 AM | [Subject] | Value proof | 30-40% |
| 3 | Day 4 | 2:00 PM | [Subject] | Different angle | 25-35% |
| 4 | Day 6 | 10:30 AM | [Subject] | Social proof | 20-30% |
| 5 | Day 8 | 3:00 PM | [Subject] | Resource share | 15-25% |
| 6 | Day 10 | 9:00 AM | [Subject] | Direct ask | 12-20% |
| 7 | Day 14 | 4:00 PM | [Subject] | Breakup email | 10-18% |

**Sending Best Practices**:
- Tuesdays-Thursdays = highest open rates
- 10-11 AM and 2-3 PM = optimal times
- Avoid Mondays (inbox overload) and Fridays (weekend mode)
- Timezone: Send based on recipient's local time

---

## 📨 Email #1: The Introduction

**Send**: Day 0 at 10:00 AM (Tuesday-Thursday)
**Goal**: Get them to read and recognize you're relevant

### Subject Lines (A/B Test)

**Version A** (Curiosity-based):

Quick question about [their company]'s [specific challenge]


**Version B** (Value-based):

[Quantifiable outcome] for [their company type]


**Version C** (Personalized):

[Name], saw your post about [specific topic]


**Recommended**: Test A vs B initially, use C for highly personalized segments

---

### Email Body

Hi [First Name],

I noticed [specific observation about their company/role/recent activity] and thought you might be facing [specific challenge common to their situation].

We've helped [similar company 1] and [similar company 2] [achieve specific outcome] without [common objection/pain point].

Worth a quick 15-minute conversation to see if we can do the same for [their company]?

Best, [Your Name] [Your Title] [Company]

P.S. - [Personalized one-liner based on research - optional but powerful]


---

### Variables to Customize

| Variable | Example | How to Find |
|----------|---------|-------------|
| `[specific observation]` | "you're expanding to 3 new regions" | LinkedIn, company news, press releases |
| `[specific challenge]` | "managing distributed team security" | Job postings, industry reports, LinkedIn posts |
| `[similar company 1]` | "Acme Corp (Series B, 50 employees)" | Your customer list, same industry/stage |
| `[achieve specific outcome]` | "reduce onboarding time by 60%" | Your case studies with metrics |
| `[common objection]` | "expensive consultants or long implementations" | Common buying objections in sales calls |

---

### Personalization Examples

**SaaS Company**:
> Hi Sarah,
>
> I saw Acme Software raised a Series B last month (congrats!) and is hiring 15 sales reps according to LinkedIn. That kind of growth usually creates onboarding bottlenecks.
>
> We helped ChartMogul and Segment cut new rep ramp time by 40% without adding headcount to training teams.
>
> Worth a quick call to see if we could help Acme do the same?

**Enterprise**:
> Hi John,
>
> Noticed your team at GlobalTech recently posted 8 cloud security engineer roles. When my previous clients scaled that fast, credential management became a nightmare.
>
> We've helped Fortune 500 IT teams like yours at Cisco and IBM automate access controls—cutting security incidents by 75%.
>
> 15 minutes to discuss your approach?

---

## 📨 Email #2: The Value Proof

**Send**: Day 2 at 11:00 AM
**Goal**: Establish credibility with concrete evidence
**Subject**: "How [Similar Company] achieved [specific result]"

### Email Body

[First Name],

Following up on my email from [day of week]—wanted to share a quick example of how this worked for a company like [their company].

[Similar Company Name] was [specific situation similar to prospect's]. In just [timeframe], they:

✓ [Specific result #1 with metric] ✓ [Specific result #2 with metric] ✓ [Specific result #3 with metric]

The best part? They got started in under [timeframe] without [common objection].

[Link to case study] if you want details.

Happy to walk through how we might replicate this for [their company]—would [Day] at [Time] or [alternate time] work for 15 minutes?

[Your Name]


---

### Social Proof Options

**Case Study Format**:

Intercom was struggling with [problem]. Using [your solution], they [action taken] and achieved [result] in [timeframe].


**Stats Format**:

Teams using [your solution] typically see: • [X%] increase in [metric] • [X%] decrease in [problem] • [X hour/day/week] saved on [task]


**Name-Drop Format**:

Companies like Stripe, Notion, and Figma use [solution] for [use case]—they've seen [common result].


---

## 📨 Email #3: The Different Angle

**Send**: Day 4 at 2:00 PM
**Goal**: Address alternative pain point they may care more about
**Subject**: "Different thought about [their company]"

### Email Body

Hi [First Name],

I realize [original pain point from Email 1] might not be top of mind right now.

But what about [alternative pain point]?

Most [their role/title]s we talk to say [common complaint], which is why [mini value prop related to this pain point].

Just a thought—but if this hits closer to home, happy to share how [quick win].

[Your Name]

P.S. - If neither of these are relevant, just let me know and I'll stop bothering you!


---

### Alternative Angle Ideas

| Original Angle | Alternative Angle |
|----------------|-------------------|
| Save money | Save time |
| Increase efficiency | Reduce risk |
| Scale faster | Improve quality |
| Better metrics | Better team morale |
| Revenue growth | Customer retention |

---

## 📨 Email #4: The Social Proof

**Send**: Day 6 at 10:30 AM
**Goal**: Show peer validation
**Subject**: "[Mutual connection] suggested I reach out" OR "How [competitor] is handling [challenge]"

### Email Body

[First Name],

Quick note—I was speaking with [name/title] at [similar company or competitor] last week about [challenge].

They mentioned that [insight or approach they're taking], which made me think of our previous emails about [their company].

Here's what [name] said after implementing [solution]: "[Direct quote with specific result]"

Not sure if you're taking a similar approach at [their company], but figured it was worth sharing.

Open to a quick call if you'd like to hear more about what's working in [their industry/role]?

[Your Name]


---

### Social Proof Frameworks

**Option 1: Testimonial**

"[Solution] cut our [process] time by half. Paid for itself in 2 months."

  • [Name, Title, Company]

**Option 2: Industry Stat**

84% of [their industry] teams report [problem]. Those using [your solution] reduced that to 12%.


**Option 3: Peer Comparison**

While most [industry] companies still use [old method], leaders like [impressive company 1], [impressive company 2], and [impressive company 3] have moved to [your approach].


---

## 📨 Email #5: The Resource Share

**Send**: Day 8 at 3:00 PM
**Goal**: Give value without asking for anything
**Subject**: "Thought you might find this useful"

### Email Body

[First Name],

No ask here—just wanted to share something that might help:

[Brief description of valuable resource]: [Link to guide/video/tool]

We created this after hearing [their role]s consistently struggle with [pain point]. Lots of actionable tips even if you never use our product.

Hope it's helpful!

[Your Name]

P.S. - If you do find it useful and want to chat about [main topic], I'm around.


---

### Resource Ideas

**Content Types**:
- Industry benchmark report
- How-to guide/checklist
- Template or tool
- Webinar recording
- Calculator/ROI tool
- Comparison guide
- Research study

**Example**:

I put together "The 2024 Sales Onboarding Playbook" after interviewing 50 VPs of Sales about what's working.

Includes: ✓ Onboarding timeline template ✓ Training curriculum framework ✓ Metrics to track ✓ Tools comparison

No forms, no gates—just helpful stuff: [link]


---

## 📨 Email #6: The Direct Ask

**Send**: Day 10 at 9:00 AM
**Goal**: No games, direct meeting request
**Subject**: "Let's cut to the chase"

### Email Body

[First Name],

I've sent a few emails about [main value prop], but let me be direct:

I think we could help [their company] [achieve specific outcome] based on [specific observation about their situation].

If you're open to it, I'd like to show you:

  1. [Specific thing #1 you'll show]
  2. [Specific thing #2 you'll show]
  3. [How others in their position use it]

15 minutes. No pressure. Just showing you what's possible.

How's [specific day/time]?

[Your Name] [Phone number - make it easy]


---

### Direct Ask Frameworks

**Option 1: The Specific Time**

Are you free Tuesday at 2 PM or Wednesday at 10 AM for 15 minutes? I'll send a calendar invite.


**Option 2: The Open-Ended**

What does your calendar look like next week? Happy to work around your schedule.


**Option 3: The Low-Commitment**

Want to start with a 10-minute screen share? I can show you [specific thing] and you can decide if it's worth exploring more.


---

## 📨 Email #7: The Breakup

**Send**: Day 14 at 4:00 PM
**Goal**: Final attempt with FOMO and respect
**Subject**: "Should I close your file?"

### Email Body

[First Name],

I'm going to assume [topic] isn't a priority right now, and that's totally fine.

I'll close your file on my end unless I hear otherwise.

For what it's worth, we typically see the best results when [time-sensitive reason], so if you do want to revisit this in the future, might be worth a quick conversation now.

But no worries either way—appreciate your time.

[Your Name]

P.S. - If there's someone else at [their company] I should be talking to about this instead, happy to redirect.


---

### Breakup Email Variations

**Option 1: The FOMO**

Subject: "Taking you off the list"

[Name], I'll take you off my follow-up list since I haven't heard back.

Just FYI—[competitor or similar company] just started implementation this week and they're seeing [early result] already.

If you change your mind in the next quarter, let me know. Otherwise, all the best!


**Option 2: The Permission**

Subject: "Is this a bad time?"

[Name], haven't heard back so I'm assuming this either:

  1. Isn't relevant
  2. Isn't a priority
  3. Bad timing

Which is it? If it's #3, when should I check back in?


**Option 3: The Referral Ask**

Subject: "Wrong person?"

[Name], clearly I'm not reaching the right person at [Company].

Should I be talking to someone else about [topic]? Happy to redirect.


---

## 🧪 A/B Testing Strategy

### Test Variables

**Subject Lines** (Test These First):
- Question vs. Statement
- Generic vs. Personalized
- Short (3-5 words) vs. Long (8-12 words)
- Curiosity vs. Value prop
- With emoji vs. without

**Email Body**:
- Length: Short (50 words) vs. Medium (100 words)
- CTA: Link vs. Question vs. Time slot
- Bullets vs. Paragraph format
- Social proof: Stats vs. Names vs. Quotes

**Sending Time**:
- Morning (9-11 AM) vs. Afternoon (2-4 PM)
- Tuesday vs. Wednesday vs. Thursday
- Recipient's timezone (test if worth the complexity)

### Sample A/B Test

**Email 1 Test**:
- **Version A**: Curiosity subject + short email (50 words) + question CTA
- **Version B**: Value subject + medium email (100 words) + meeting time CTA

Send to 100 prospects: 50 get A, 50 get B
Wait 48 hours, measure open and reply rates
Winner goes to remaining list

---

## 📊 Sequence Performance Metrics

### Benchmarks to Track

| Metric | Good | Great | Exceptional |
|--------|------|-------|-------------|
| Email 1 Open Rate | 35-45% | 45-55% | 55%+ |
| Email 1 Reply Rate | 3-8% | 8-15% | 15%+ |
| Sequence Reply Rate | 8-15% | 15-25% | 25%+ |
| Positive Reply % | 40-50% | 50-70% | 70%+ |
| Meeting Booked % | 1-3% | 3-6% | 6%+ |

### Success Factors

**High Reply Rates**:
- ✅ Highly personalized opening line
- ✅ Clear value prop in first 2 sentences
- ✅ Social proof from similar companies
- ✅ Low-friction CTA
- ✅ Sent at optimal time
- ✅ Clean email formatting (no images, minimal links)

**Low Reply Rates**:
- ❌ Generic template language
- ❌ Too salesy in tone
- ❌ No personalization
- ❌ Vague value prop
- ❌ Lengthy paragraphs
- ❌ Broken links or poor formatting

---

## 🎯 Segmentation Strategy

### Create Variants for:

**By Industry**:
- Change case studies to same industry
- Adjust pain points to industry-specific
- Use industry terminology

**By Company Size**:
- Startup: Speed, agility, ROI focus
- Mid-Market: Scalability, efficiency
- Enterprise: Security, compliance, integration

**By Role**:
- Executive: Strategic outcomes, revenue impact
- Practitioner: Time savings, ease of use
- Technical: Architecture, integrations, specs

**By Intent Signal**:
- Hot leads: Shorter sequence, faster cadence
- Warm leads: Standard 7-email sequence
- Cold leads: Longer nurture sequence

---

## 💡 Pro Tips

1. **The 3-Second Rule**: Prospect should understand value in first 3 seconds of reading
2. **One CTA Only**: Don't give multiple options; one clear next step
3. **Mobile-First**: 50%+ of emails opened on mobile; keep it scannable
4. **No Attachments**: Use links instead; attachments trigger spam filters
5. **Real Reply-To**: Use your actual email, not no-reply@ (and actually reply!)
6. **Personalization Tokens**: Use sparingly; obvious automation kills trust
7. **The P.S. Works**: PostScripts get read; use for secondary CTA
8. **Remove Unsubscribes**: No formal unsubscribe needed for 1-t

…

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [nicepkg](https://github.com/nicepkg)
- **Source:** [nicepkg/ai-workflow](https://github.com/nicepkg/ai-workflow)
- **License:** MIT
- **Homepage:** https://ai-workflow.xiaominglab.com/

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.