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Onboarding Emails · chunkydotdev | DecimalAI

marketingby chunkydotdev

Onboarding Emails

chunkydotdev/onboarding-emails

Source chunkydotdev/email-skills ↗License MIT

Build welcome and activation email sequences.

SkillScore91Maintained

Automatic

Marketing & Content pack

Last verified 8/6/2026

What it changes

Passed 20 of 22 test cases with the skill, and 13 of 22 without it.

Without skill59%

With skill91%

Checks it passed that the model alone missed

Advises excluding sales or upgrade pitches from the initial welcome email.
Recommends a 3-email onboarding sequence for products with time-to-value under 5 minutes.
Mentions avoiding Gmail clipping limits or image blocking as a reason for minimal HTML formatting.

and 4 more in the full report

7 fixed13 passed either way2 still failing0 broke

Pass-rate lift: +32 pp
Tokens: +251%
Agent turns: 0%
Response time: -20%

Model gemini-3.6-flashMeasured 8/6/2026v120 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/chunkydotdev-onboarding-emails/SKILL.md https://app.decimal.ai/s/chunkydotdev-onboarding-emails/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add chunkydotdev-onboarding-emails, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/chunkydotdev-onboarding-emails/ and pins it in .decimal/skills.lock

decimalai skills add chunkydotdev-onboarding-emails

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/chunkydotdev-onboarding-emails/SKILL.md https://app.decimal.ai/s/chunkydotdev-onboarding-emails/SKILL.md

Raw file: /s/chunkydotdev-onboarding-emails/SKILL.md ↗ · machine-readable summary at /s/chunkydotdev-onboarding-emails.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 7

Prompt

We want to build a standard 5-email onboarding sequence across a 1-2 week window for a mainstream SaaS app. What specific goal and trigger should be assigned to email #3 in this 5-email framework?

What was checked, without and with the skill
Checked	Without skill	With skill
Identifies email #3 as a stall recovery or next-step nudge triggered 48 hours after signup for non-activated users.	Missed	Passed

case-21 · gemini-3.6-flash · 8/6/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md436 linessingle file

Onboarding Emails

Design welcome sequences and activation emails that get new users to their first moment of value.

When to use this skill

Building a welcome email sequence for a new SaaS product or service
Users are signing up but not completing setup or reaching activation
Designing trial-to-paid conversion email flows
Deciding between time-based drip sequences and behavior-triggered emails
Improving an existing onboarding sequence that has poor activation rates
Segmenting onboarding emails by plan, role, or use case
Adding stall detection to re-engage users who drop off mid-onboarding

Related skills

transactional-email - receipts and auth emails that sit alongside onboarding
email-sequences - general drip campaign architecture (onboarding is a specific case)
email-copywriting - writing the actual email content
template-design - HTML templates that render correctly everywhere
notification-design - product notification patterns that complement onboarding
suppression-lists - managing opt-outs so you stop when users say stop
ab-testing - testing subject lines and content within your sequence

The goal of onboarding emails

The point is not open rates. The point is activation - getting users to the moment where they experience your product's value. Every email in the sequence should push toward a single action that moves the user closer to that moment.

Before writing a single email, define your activation milestone. What does a user need to do before they "get it"? Examples:

Developer tool: Make a successful API call
Project management app: Create a project and invite a team member
Email platform: Send the first email
Analytics product: Install the tracking snippet and see their first dashboard

Everything in your onboarding sequence should point toward that milestone.

Track record

Benchmark

20 / 22

test cases passed, vs 13 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/2/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

chunkydotdev / email-skills

skills/sending/onboarding-emails/SKILL.md

View on GitHub ↗

License MITImported 8/2/2026Version v1

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