FreeSkills
Bootstrapped growth advisor
- 598598 downloads
- 229229 likes
- 215215 saves
Works with
- Claude Code
- Codex
- Cursor
- and 3 more
Email subject line optimization v1.0.0
Use this resource to find a subject line that gets more opens
New
- 337 downloads
- 108 likes
- 227 saves
Free
Install with the CLI
In a terminal, from the folder you want:
npx --yes palatekit@latest install email-subject-line-testing-2With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.
First time: connect the CLI with
npx --yes palatekit@latest loginThe agent writes several subject line variants based on proven copywriting frameworks, then sets up an A/B test to compare them. It estimates open rates from past performance when you provide it. You get a shortlist of subject lines and a test plan.
Mostly picked by
Updated November 2, 2026
Previews
Details
- Install guides
- Generates with
- Your agent's model
- Licence
- MIT
Similar resources
View all- Free
FreeSkills
Form design and strategy
- 501501 downloads
- 240240 likes
- 134134 saves
Works with- Claude Code
- Codex
- Cursor
- and 3 more
FreeSkills
Growth state reconnaissance
- 344344 downloads
- 204204 likes
- 197197 saves
Works with- Claude Code
- Codex
- Cursor
- and 3 more
FreeSkills
Email sequences
- 335335 downloads
- 157157 likes
- 101101 saves
Works with- Claude Code
- Codex
- Cursor
- and 3 more
FreeSkills
Customer journey mapping
- 600600 downloads
- 111111 likes
- 214214 saves
Works with- Claude Code
- Codex
- Cursor
- and 3 more
FreeSkills
A/B testing: hypotheses, sample size and analysis
- 589589 downloads
- 110110 likes
- 132132 saves
Works with- Claude Code
- Codex
- Cursor
- and 3 more
FreeSkills
Conversion rate optimization
- 561561 downloads
- 235235 likes
- 212212 saves
Works with- Claude Code
- Codex
- Cursor
- and 3 more
FreeSkills
Customer.io primary messaging workflow
- 420420 downloads
- 164164 likes
- 172172 saves
Works with- Claude Code
- Codex
- Cursor
- and 3 more
What you get
- SKILL.md: subject line method and output format
- SKILL.md: A/B test plan and recommendations
Good fit for
- Fewer people open your emails than before
- You are launching a newsletter and want to test several approaches
Not for
Tags
- subject line
- a/b test
- open rate
About
You say
“Propose five subject lines for our back-to-school promotion and an A/B test plan between two of them.”
Skill published by onewave-ai under the MIT license, delivered in its original version.
Show moreShow less
How to use it
- Install the skill in your agent's skills folder
- Ask your agent to find a subject line that gets more opens
- Review and adjust the result
Content preview
Files
- LICENSE1.1 KB
- NOTICE-PALATEKIT.md0.5 KB
- SKILL.md1.4 KB
Origin and licence
Listed unmodified
- Author
- onewave-ai
- Source
- github.com/onewave-ai/claude-skills/tree/b2267d9171af4f56848d82992381b20b89b44056/email-subject-line-optimizer
- Licence
- MIT
Notice
« email-subject-line-optimizer » (onewave-ai, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.
User reviews
–
No ratings yet
Loading reviews…