CtrlK
BlogDocsLog inGet started
Tessl Logo

cold-email

Write B2B cold emails and follow-up sequences that earn replies. Use when creating outbound prospecting emails, SDR outreach, personalized opening lines, subject lines, CTAs, and multi-touch follow-up sequences.

68

Quality

83%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Passed

No findings from the security scan

The canonical home for this skill is cold-email in administrakt0r/AI-Agents-Safe-Coding-Skills

SKILL.md
Quality
Evals
Security

Quality

Content

78%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 well-structured, lean skill body that provides concrete writing guidance and cleanly delegates detail to one-level-deep reference files that all exist. The main improvement opportunity is removing the duplicated reference listing in the Data & Benchmarks section.

DimensionReasoningScore

Conciseness

The body is lean and assumes Claude's competence — principles are stated in tight bullets without explaining basic concepts — but the 'Data & Benchmarks' section re-lists reference links already cited inline, a minor instance of redundancy that could be trimmed.

4 / 5

Actionability

Concrete, executable guidance for an instruction-only skill: named frameworks ('Observation → Problem → Proof → Ask'), explicit subject-line rules ('2-4 words, lowercase'), and specific CTA examples ('Worth exploring?'), with minor gaps since full templates live only in references.

4 / 5

Workflow Clarity

A clear sequence runs from 'Before Writing' (numbered inputs) through 'Writing Principles' to a 'Quality Check' checkpoint; this is a non-destructive writing skill so no validation cap applies, but the checkpoints are gut-check prompts rather than explicit pass/fail gates.

4 / 5

Progressive Disclosure

The body is a well-organized overview with clearly signaled, one-level-deep references to references/*.md, all of which exist (benchmarks, frameworks, personalization, subject-lines, follow-up-sequences), making navigation easy.

5 / 5

Total

17

/

20

Passed

Description

88%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, specific description that explicitly covers both what the skill does and when to use it with natural trigger terms. It is concise and avoids fluff, with only minor gaps in synonym coverage and slight overlap with adjacent skills.

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions — 'Write B2B cold emails and follow-up sequences', 'personalized opening lines, subject lines, CTAs, and multi-touch follow-up sequences' — covering the domain comprehensively.

5 / 5

Completeness

Clearly answers both what ('Write B2B cold emails and follow-up sequences that earn replies') and when ('Use when creating outbound prospecting emails, SDR outreach...') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Strong natural keywords a user would actually say ('cold emails', 'follow-up sequences', 'SDR outreach', 'outbound prospecting emails'), but a few common synonyms like 'cold outreach' or 'sales emails' are missing, so it sits just below the top anchor.

4 / 5

Distinctiveness Conflict Risk

The cold/outbound-prospecting framing carves a clear niche distinct from copywriting or nurture sequences, but there is minor overlap risk with the related email-sequence and copywriting skills listed in Related Skills.

4 / 5

Total

18

/

20

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

15

/

16

Passed

Repository
administrakt0r/AI-Agents-Safe-Coding-Skills
Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.