cold-email

Write B2B cold emails and follow-up sequences that get replies. Use when the user wants to write cold outreach emails, prospecting emails, cold email campaigns, sales development emails, or SDR emails. Also use when the user mentions "cold outreach," "prospecting email," "outbound email," "email to leads," "reach out to prospects," "sales email," "follow-up email sequence," "nobody's replying to my emails," or "how do I write a cold email." Covers subject lines, opening lines, body copy, CTAs, personalization, and multi-touch follow-up sequences. For warm/lifecycle email sequences, see emails. For sales collateral beyond emails, see sales-enablement.

Quality

96%

Does it follow best practices?

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Securityby

Passed

No findings from the security scan

Quality

Content

93%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A tightly written, highly actionable cold-email skill that pushes detail into five real reference files and keeps the body as a navigable overview. The only soft spot is workflow clarity: the process is clear and ends with a quality-check checkpoint, but it lacks the explicit validate→fix→retry feedback loop the top anchor calls for.

Suggestions

Tighten workflow_clarity toward a 5 by adding an explicit feedback loop in the Quality Check section (e.g., 'If it fails any check, rewrite that element and re-read aloud before presenting').

Consider a short explicit ordering cue at the top of 'Writing Principles' so Claude knows the Before-Writing → Draft → Quality-Check sequence is mandatory rather than optional.

The 'Structure' section says there is no single right structure; a one-line default recommendation for first-touch emails would make the entry point more deterministic.

Dimension	Reasoning	Score
Conciseness	Lean throughout: short bulleted principles, no padding, and no explanation of concepts Claude already knows (it never defines what a cold email or CTA is). Every section earns its tokens, matching the skill's own "every sentence must earn its place" ethos.	5 / 5
Actionability	Concrete, copy-paste-ready guidance throughout: named frameworks with example copy ("Observation → Problem → Proof → Ask"), specific subject-line rules ("2-4 words, lowercase"), example CTAs ("Worth exploring?"), and a concrete "What to Avoid" list — highly actionable for an instruction-only skill.	5 / 5
Workflow Clarity	Clear sequence from "Before Writing" (numbered context-gathering list) through principles/structure to a "Quality Check" validation checkpoint before presenting, but it is guidance-oriented rather than a rigidly sequenced process with explicit error-recovery feedback loops.	4 / 5
Progressive Disclosure	SKILL.md is a well-structured overview with one-level-deep references (personalization.md, frameworks.md, subject-lines.md, follow-up-sequences.md, benchmarks.md — all verified present), each clearly signaled via markdown links with a short description, plus a consolidated "Data & Benchmarks" navigation section.	5 / 5
	Total	19 / 20 Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, model description: it states concrete capabilities, supplies abundant natural trigger phrases for both what and when, and disambiguates itself from adjacent email/sales skills with explicit cross-references. Third-person imperative voice is used throughout with no first/second-person drift.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete capabilities — "Write B2B cold emails and follow-up sequences," then enumerates "subject lines, opening lines, body copy, CTAs, personalization, and multi-touch follow-up sequences," giving comprehensive coverage of the skill's actions.	5 / 5
Completeness	Explicitly answers both what (writing B2B cold emails and follow-up sequences covering the listed components) and when, via two "Use when..." clauses with concrete trigger phrases; no ambiguity about either.	5 / 5
Trigger Term Quality	Comprehensive natural trigger coverage including synonyms and phrasings users actually say: "cold outreach," "prospecting email," "outbound email," "email to leads," "reach out to prospects," "sales email," "nobody's replying to my emails," and "how do I write a cold email."	5 / 5
Distinctiveness Conflict Risk	Clear cold-outreach niche with distinct triggers and explicit boundary routing ("For warm/lifecycle email sequences, see emails. For sales collateral beyond emails, see sales-enablement."), minimizing overlap with sibling skills.	5 / 5
	Total	20 / 20 Passed

Validation

100%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: coreyhaines31/marketingskills
Path: skills/cold-email/SKILL.md
Commit: 5b2c000

Reviewed: 3 days ago

Table of Contents

Discovery Implementation Validation

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