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Co-branded email copy generator

Generates complete co-branded email copy — subject lines, preview text, body, and CTAs — that blends two brands' voices, respects both sets of messaging guidelines, and speaks to the partner's audience while advancing…

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Purpose

Produce send-ready co-branded email copy that satisfies two brand teams at once — matching the partner's audience and voice without violating the primary brand's messaging rules — so partner marketers stop trading redlined drafts back and forth. Solves the core co-marketing problem: one email, two approvals, zero brand friction.

When to Use

Invoke this skill when the user asks to:

  • Write email copy for a joint partner campaign or co-marketing push
  • Announce a new integration, bundle, or partnership to a partner's list
  • Draft a co-hosted webinar or event invitation
  • Create a joint offer or promotion email both brands will send
  • Adapt an existing brand email to fit a partner's audience and tone
  • Build a co-branded email sequence for a shared launch

Inputs Required

Before starting, collect:

  • Primary brand: Name, what they do, and non-negotiable messaging guidelines (banned claims, required disclaimers, tone rules)
  • Partner brand: Name, what they do, and their voice/tone (formal, playful, technical, etc.)
  • Partner's audience: Who receives this email — role, industry, sophistication level
  • Campaign goal: The one action this email must drive (register, book demo, redeem offer, click to landing page)
  • The offer or news: What's actually being announced or offered, and any dates/terms
  • Who sends it: Whose "from" name and list — primary brand, partner, or both
  • CTA destination: Where the primary link goes, plus any secondary link

If partner voice is unspecified, mirror a neutral-professional tone and flag it. If sender is unspecified, default to the partner's list with co-branded framing.

Instructions

Step 1: Reconcile the Two Voices

Establish the blended voice before writing a word.

  • Identify the dominant voice: The sending brand's voice leads; the other brand is referenced with respect but doesn't override tone. If co-sent, split the difference and keep it neutral-professional.
  • Map the guardrails: List the primary brand's hard rules (banned words, required legal language, prohibited claims). These are inviolable regardless of whose list sends.
  • Set the "we" convention: Decide how the email refers to the partnership — "We've teamed up with...", "[Partner] and [Primary] are bringing you...", or first-person from the sender referencing the other. Pick one and hold it throughout.

Step 2: Anchor the Value Exchange

Answer why the partner's audience should care, in their terms.

  • Lead with the audience's problem, not the partnership itself. Nobody opens an email because two companies signed a deal.
  • Frame the offer as: the partner's audience already trusts [Partner]; [Primary] extends that trust with [specific benefit].
  • Name one concrete, quantified benefit where possible (time saved, discount %, exclusive access, integration capability).

Step 3: Write the Copy Components

Subject lines (5 options)

  • Vary the angle: curiosity, direct benefit, partnership news, exclusivity, question.
  • Keep under 50 characters where possible; label character count on each.
  • At least 2 must reference or imply both brands or the "exclusive/together" angle.

Preview text (3 options)

  • Extend the subject line, don't repeat it. 40–90 characters each.

Body copy (150–250 words) Structure in this order:

  1. Hook (1–2 sentences): The audience's problem or a partnership-relevant reason to read on.
  2. The connection (1–2 sentences): Why these two brands together — establish credibility of the pairing.
  3. The offer/news (2–3 sentences): What they get, stated concretely, with any terms.
  4. Proof or specificity (1 sentence): One detail that makes it real — a number, a feature, a name.
  5. Transition to CTA (1 sentence): Remove friction, restate the benefit at the click.

Primary CTA button copy (3 options)

  • Action-first, benefit-forward. Avoid "Learn More" and "Click Here."

Secondary CTA (optional, 1 option)

  • Lower-commitment path for the not-yet-ready reader, if a secondary destination exists.

Sign-off: Written in the sending brand's voice, referencing the co-branded relationship.

Step 4: Add the Compliance & Approval Notes

Below the copy, list:

  • Which primary-brand guardrails were applied and where.
  • Any required disclaimer or legal line, placed in the copy.
  • Flags for the partner team: any claim, date, or term that needs their factual confirmation.

Output Format

  • Structure: Reconciled-voice summary → subject lines → preview text → full body copy → CTA options → sign-off → compliance & approval notes
  • Length: 600–900 words total; body copy itself 150–250 words
  • Format: Labeled sections with numbered/lettered options; body copy shown as a ready-to-paste block
  • Sections: Voice reconciliation note, Subject Lines (5), Preview Text (3), Body Copy, Primary CTA (3), Secondary CTA (1), Sign-off, Approval Notes
  • Tone: The blended voice established in Step 1 — professional, warm, benefit-led, never breathless about the partnership for its own sake

Quality Checklist

Before delivering output, verify:

  • [ ] 5 subject lines, 3 preview texts, 3 primary CTA options are all present and counted
  • [ ] Body copy is 150–250 words and follows the 5-part structure in order
  • [ ] Both brand names appear naturally, and neither is misrepresented or over-claimed
  • [ ] Every primary-brand guardrail provided is respected — no banned claims, all required lines included
  • [ ] Copy opens with the audience's benefit or problem, not the partnership announcement
  • [ ] Approval notes flag any date, term, or claim needing the partner's factual sign-off

Notes

  • The most common co-branded failure is leading with "We're excited to announce our partnership" — the audience doesn't care about the deal, only what it does for them. Bury the partnership language beneath the benefit.
  • When the two brands' voices genuinely clash (e.g., one is irreverent, one is corporate-formal), default toward the sending brand's audience expectations, not a bland average that pleases neither team.
  • If the campaign is a sequence rather than a single send, ask whether email 1 should establish the partnership and email 2+ should focus purely on the offer — this usually converts better than repeating the "we teamed up" framing every send.

How to use this skill

This file is a Claude Code skill in Anthropic's standard format — markdown with YAML frontmatter at the top.

Installing in Claude Code:

  • ~/.claude/skills/<folder-name>/SKILL.md — auto-loads in every session anywhere on your machine (recommended for skills you'll use across multiple projects)
  • <your-project>/.claude/skills/<folder-name>/SKILL.md — auto-loads only when working in that project (recommended for project-specific skills)

Restart Claude Code or open a new session to register.

Using in Claude.ai, ChatGPT, Gemini, or other AI tools:

  1. Drag this file into a new chat, or copy and paste its contents
  2. Send your task or request as your next message — the AI will apply the skill where it fits

For Claude Code skill details: https://docs.anthropic.com/en/docs/claude-code/skills