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.
SkillScore73Maintained
Automatic
◆Sales & GTM pack
Last verified 8/24/2026
What it changes
Passed 16 of 22 test cases with the skill, and 10 of 22 without it.
Without skill45%
With skill73%
Checks it passed that the model alone missed
Includes only one soft ask CTA.
Keeps the email length between 60 and 90 words.
Keeps the message length between 30 and 50 words.
and 5 more in the full report
7 fixed9 passed either way5 still failing1 broke
Pass-rate lift
+27 pp
Tokens
+38%
Agent turns
0%
Response time
+5%
Model gemini-3.6-flashMeasured 8/24/2026v116 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
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
Write email 6 for our sales sequence. Should we send another general industry article or make a direct request?
What was checked, without and with the skill
Checked
Without skill
With skill
Presents a direct meeting request as the call to action.
Passed
Passed
Keeps the message length between 30 and 50 words.
Missed
Passed
case-13 · gemini-3.6-flash · 8/24/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md42 lines5 files
Cold Email Sequence Generator
Craft personalized, value-driven cold email sequences with optimal timing, A/B-tested subject lines, and integrated social proof. The goal of cold email is to start a conversation, not to close the sale in the inbox.
Select the personalization level: Hyper-Personal (unique research per prospect), Account-Based (company-specific), Segment-Based (industry/role), or Volume (template with merge tags).
Identify the key pain points and the strongest social proof (case studies, stats, named customers) to support the campaign.
Build the sequence using the per-position templates in references/email-templates.md. Vary the angle across emails: Introduction, Value Proof, Different Angle, Social Proof, Resource Share, Direct Ask, Breakup.
Generate A/B subject-line variations and assign send timing per email, following references/output-format.md.
Add personalization guidance, performance benchmarks, and optimization recommendations from references/optimization.md.
Assemble the final deliverable in the structure defined in references/output-format.md.
Core Rules
Always personalize the first line with something specific about the prospect or their company.
Keep emails short; the best cold emails run under 100 words.
Use one ask per email; never bury multiple CTAs.
Honor replies immediately when a prospect says no or asks to stop.
Run an A/B test on some variable in every campaign.
Invest in follow-up: roughly 80% of responses come from emails 3-7.