Developer Email Sequences

This skill helps you craft email sequences that developers actually read. No spam, no fluff — just useful content delivered at the right frequency.

Before You Start

1. Load your developer audience context:

   • Check if .agents/developer-audience-context.md exists
   • If not, run the developer-audience-context skill first
   • Understanding your developers' tech stack, pain points, and communication preferences is essential for effective email

2. Audit existing emails:

   • What emails are you currently sending?
   • What are open rates, click rates, unsubscribe rates?
   • Any feedback from developers about your emails?

The Developer Email Reality

Developers are ruthless with email:

Golden rule: Every email must provide immediate value or solve a problem.

Email Sequence Types

1. Onboarding Sequence

Goal: Get developers to their first "Hello World" moment.

Timing:

• Email 1: Immediately after signup
• Email 2: 24 hours (if no activation)
• Email 3: 3 days (if no activation)
• Email 4: 7 days (if no activation)
• STOP if they activate

Structure:

Template: Welcome Email

Subject: Your API key is ready

Hey [NAME],

Your API key: [KEY]

Quickstart (2 minutes):
[LINK TO QUICKSTART]

That's it. Hit reply if you get stuck.

— [SENDER NAME]

Template: First Nudge

Subject: Quick question about your setup

Hey [NAME],

Noticed you haven't made your first API call yet.

Where'd you get stuck?

[ ] Didn't have time yet
[ ] Confused about authentication
[ ] Can't find the right SDK
[ ] Something else

Just reply — I read every response.

— [SENDER NAME]

2. Activation Sequence

Goal: Turn first-time users into regular users.

Trigger: After first successful API call or integration.

Timing:

• Email 1: Immediately after first success
• Email 2: 3 days later
• Email 3: 7 days later
• Email 4: 14 days later

Structure:

3. Changelog / Product Update Emails

Goal: Keep developers informed without overwhelming them.

Frequency: Weekly digest or per-release (never more than 2x/week).

Structure:

Subject: [Product] v2.3 — Faster webhooks, TypeScript 5 support

What's new:

## Breaking changes (read first)
- Webhook signature algorithm changed (migration guide)

## New
- TypeScript 5.0 support
- Batch API for bulk operations

## Improved
- Webhook delivery 3x faster
- Better error messages for auth failures

## Fixed
- Memory leak in long-running connections

Full changelog: [LINK]

---

Need help upgrading? Reply or join #support in Discord.

Rules:

• Breaking changes ALWAYS at the top
• Code examples for new features
• Link to full changelog, don't dump everything in email
• No marketing fluff — just facts

4. Re-engagement Sequence

Goal: Win back developers who've gone quiet.

Trigger: No activity for 30/60/90 days.

Timing:

• Email 1: Day 30 of inactivity
• Email 2: Day 45
• Email 3: Day 60
• Email 4: Day 90 (sunset warning)

Structure:

Template: Check-in

Subject: Did something break?

Hey [NAME],

Haven't seen you in a while.

Quick check:

- Did you run into a problem? (Reply and I'll help)
- Building something else? (Totally fine)
- Found a better solution? (Genuinely curious what)

No hard feelings either way — just want to make sure
you're not stuck on something we can fix.

— [SENDER NAME]

Template: Sunset Warning

Subject: Pausing your account in 14 days

Hey [NAME],

Your [PRODUCT] account has been inactive for 90 days.

To keep things tidy, we'll pause your account on [DATE].

What this means:
- Your API keys will stop working
- Your data stays safe (we don't delete anything)
- You can reactivate anytime by logging in

If you're still using [PRODUCT], just log in once to keep
your account active: [LOGIN LINK]

No action needed if you've moved on.

— [SENDER NAME]

Frequency Guidelines

The unsubscribe test: If a developer would feel relieved to unsubscribe from this email type, you're sending too many.

Technical Content in Emails

Code Snippets

Do:

• Keep snippets under 10 lines
• Use syntax highlighting (if HTML email)
• Test that code actually works
• Include language/framework version

Don't:

• Assume a specific environment
• Include secrets or realistic-looking API keys
• Use outdated syntax

Example: Good code snippet

# Python 3.8+
import yourapi

client = yourapi.Client("your-api-key")
result = client.analyze("Hello, world!")
print(result.sentiment)  # "positive"

API Updates

When announcing API changes:

## New endpoint: POST /v2/batch

Process up to 100 items in a single request.

```python
client.batch([
    {"text": "First item"},
    {"text": "Second item"},
    # ... up to 100 items
])

Rate limit: 10 batch requests/minute Docs: [LINK]

---

## Transactional vs Marketing Emails

| Transactional | Marketing |
|---------------|-----------|
| Triggered by user action | Sent on schedule |
| Expected and wanted | Needs opt-in |
| Higher deliverability | More spam filtering |
| No unsubscribe required | Must have unsubscribe |
| CAN-SPAM exempt (mostly) | Full CAN-SPAM compliance |

**Examples**:

| Transactional | Marketing |
|---------------|-----------|
| Password reset | Newsletter |
| Payment receipt | Product announcement |
| Usage alert (95% quota) | Case study promotion |
| API key rotation reminder | Webinar invitation |
| Security notification | Feature highlight |

**Gray area**: Onboarding emails can be transactional (user signed up) but should still have easy unsubscribe.

---

## Measuring Email Effectiveness

### Metrics That Matter

| Metric | Good | Warning | Action |
|--------|------|---------|--------|
| Open rate | >40% | <25% | Fix subject lines |
| Click rate | >10% | <3% | Fix content/CTA |
| Unsubscribe rate | <0.2% | >0.5% | Reduce frequency or improve targeting |
| Reply rate | >1% | N/A | Celebrate! |
| Activation (onboarding) | >30% | <15% | Rethink sequence |

### What to Track

1. **Onboarding sequence**: % who activate within 7 days
2. **Changelog emails**: Click-through to docs/release notes
3. **Re-engagement**: % who return to product
4. **All emails**: Unsubscribe rate by email type

### A/B Testing Priorities

1. Subject lines (biggest impact)
2. Send time
3. Email length
4. Plain text vs HTML
5. CTA wording

---

## Unsubscribe Handling

### Preference Center

Let developers control what they get:

Email Preferences for [EMAIL]

[ ] Product updates (new features, changelog) [ ] Security alerts (always recommended) [ ] Community news (events, meetups) [ ] Tips and tutorials

Or: Unsubscribe from all marketing emails (You'll still receive transactional emails like receipts and security alerts)

### Graceful Unsubscribe

When someone unsubscribes, confirm simply:

Subject: You're unsubscribed

You've been removed from [EMAIL TYPE] emails.

You'll still receive:

• Security alerts
• Payment receipts
• Usage notifications

Changed your mind? Update preferences: [LINK]

### Re-subscribe Flow

After unsubscribe, don't:
- Send "We miss you" emails
- Ask them to reconsider
- Add them back to other lists

Do:
- Make it easy to re-subscribe from your site
- Remember their preference if they return

---

## Email Templates Library

### Account Security

Subject: Action required: Unusual login detected

We detected a login from a new location:

Location: [CITY, COUNTRY] Device: [BROWSER/OS] Time: [TIMESTAMP]

If this was you, no action needed.

If this wasn't you:

1. Change your password immediately: [LINK]
2. Rotate your API keys: [LINK]
3. Review recent API activity: [LINK]

Questions? Reply to this email.

— [PRODUCT] Security Team

### Usage Alert

Subject: Heads up: You've used 80% of your API quota

Your usage this month: [CURRENT] / [LIMIT] requests

At your current rate, you'll hit your limit around [DATE].

Options:

• Upgrade your plan: [LINK]
• Optimize your usage: [DOCS LINK]
• Wait for reset on [RESET DATE]

We'll send another alert at 95%.

— [PRODUCT]

### Payment Failed

Subject: Payment failed — update your card to avoid interruption

We couldn't charge your card ending in [LAST4].

Update your payment method: [LINK]

We'll retry in 3 days. If unsuccessful, your account will be downgraded to the free tier on [DATE].

Your API will continue working until then.

Questions about billing? Reply to this email.

— [PRODUCT]

---

## Common Mistakes

| Mistake | Why it fails | Fix |
|---------|--------------|-----|
| "Just checking in" | No value, wastes time | Every email needs a purpose |
| Weekly newsletter with nothing new | Trains devs to ignore you | Only send when you have content |
| HTML-heavy design | Looks like marketing spam | Plain text or minimal HTML |
| Multiple CTAs | Confuses, reduces clicks | One clear action per email |
| Fake personalization | "Hi [FNAME]" feels robotic | Use personalization meaningfully or not at all |
| Celebrating your milestones | Developers don't care about your funding | Focus on what matters to them |

---

## Tools

| Tool | Use Case |
|------|----------|
| **[Octolens](https://octolens.com)** | Monitor developer sentiment about your emails — see if people complain about frequency or praise specific updates on Twitter, Reddit, Hacker News |
| **Customer.io** | Sophisticated automation for developer-focused email |
| **Postmark** | High deliverability transactional email |
| **Buttondown** | Developer-friendly newsletter platform |
| **Resend** | Modern email API built for developers |
| **Loops** | Email for SaaS with good segmentation |

---

## Related Skills

- `developer-audience-context` — Foundation for knowing what content resonates
- `developer-churn` — Re-engagement strategies for at-risk users
- `changelog-updates` — Structuring product updates
- `developer-onboarding` — Full onboarding strategy beyond just email