Spintax Depth
Spintax makes every send of a variant read slightly differently so a thousand copies of one email don't pattern-match as a thousand copies of one email. This skill defines what's safe to spin (wording with no unique meaning) and what's never spun (numbers, names, merge tags, the case study, the offer's unique mechanism), plus when to move from light spin at launch to deep spin once a variant crosses roughly 2,000 cumulative sends.
Pipeline Playbooks · Open Source, MIT Licensed
Rules for spinning finished cold email copy so a thousand sends of one variant don't look identical, what to spin, what to protect, and when to deepen it.
When to use this
- Spinning finished copy before it enters a campaign
- Deepening the spin on a variant with real volume
- Reviewing existing spintax for broken combinations
- Deciding whether a variant needs deeper spin yet
What it covers
- Syntax: single-brace pipe groups vs double-curly merge tags, no nesting
- The core principle: spin wording with no unique meaning, protect facts
- What must never be spun: numbers, names, merge tags, case studies, mechanism
- Spin density by section: heaviest on CTA, sign-off, opt-out line
- The 2,000-cumulative-send threshold for deepening body spin
- Pooled send counts after merging near-identical variants
- Worked shallow vs deep spin examples, and a broken-spin example
- Self-check list before returning spun copy
Install just this skill
Every skill folder is self-contained. Run this from your project root to pull just this one into .claude/skills/spintax-depth/:
npx degit joelwylie7/cold-email-playbooks/.claude/skills/spintax-depth .claude/skills/spintax-depth
Want the whole system, not just one skill?
Related skills
Cold Email Copywriting
Two base cold email frameworks, Offer First and Built For You, plus poke and hook opener layers and the hard bans that keep copy out of spam.
Sequence Architecture
Joel's 4-step cold sequence: a first touch, a same-thread nudge at +3 days, a fresh thread with a new offer angle at +30 days, then a final nudge.
Pre-Launch QA
A numbered gate that checks copy, settings, leads, senders, schedule and sequence structure before any campaign launches or resumes, PASS or FAIL, one line of evidence each.