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mailtrap-email-integration

Guides agents through integrating transactional email sending via Mailtrap's Email API, including sandbox testing, domain verification, and API authentication. Use when implementing email-sending features, debugging delivery issues, or setting up safe dev/staging email testing.

75

Quality

93%

Does it follow best practices?

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SecuritybySnyk

Passed

No known issues

SKILL.md
Quality
Evals
Security

Quality

Content

87%

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

Actionable and token-efficient with executable code and a useful anti-patterns table, but it lacks an explicit sequenced workflow with validation checkpoints for the risky production email-sending and domain-verification process.

Suggestions

Add a short numbered production-launch workflow with an explicit validation checkpoint, e.g. '1. Verify SPF/DKIM/DMARC records propagated 2. Send a test email to a real address 3. Only then enable production sending'.

Include a validate-then-retry feedback loop for send failures (check response status, log context, retry with backoff) to satisfy the workflow-clarity feedback-loop expectation for a fallible network operation.

Consider trimming the opening paragraph, which partially restates the frontmatter description.

DimensionReasoningScore

Conciseness

Lean body that assumes Claude's competence; the Core Concepts explain Mailtrap-specific facts (sandbox capture, DNS verification) Claude would not reliably know rather than padding with basics.

3 / 3

Actionability

Provides executable TypeScript for sending and env-based endpoint routing, plus a concrete anti-patterns table with copy-paste-ready 'Instead' guidance.

3 / 3

Workflow Clarity

Guidance is present but there is no numbered sequence with validation checkpoints for the risky production-sending/domain-verification flow, and no explicit validate-then-fix feedback loop, which caps the score.

2 / 3

Progressive Disclosure

A single well-organized file with clearly labeled sections (When to Activate, Core Concepts, Code Examples, Anti-Patterns, Best Practices) and no nested or unnecessary external references.

3 / 3

Total

11

/

12

Passed

Description

100%

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 concise, third-person description that clearly states capabilities and provides explicit 'Use when' triggers tied to natural user language. It is specific to the Mailtrap niche with low conflict risk.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'sandbox testing, domain verification, and API authentication' — rather than vague language, matching the top anchor.

3 / 3

Completeness

Explicitly answers what it does ('integrating transactional email sending via Mailtrap's Email API...') and when to use it with an explicit 'Use when...' clause.

3 / 3

Trigger Term Quality

Natural phrases a user would say ('implementing email-sending features', 'debugging delivery issues', 'safe dev/staging email testing') give good coverage of common variations.

3 / 3

Distinctiveness Conflict Risk

The Mailtrap-specific niche (transactional email, sandbox vs production, domain verification) is distinct and unlikely to trigger for unrelated skills.

3 / 3

Total

12

/

12

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
affaan-m/ECC
Reviewed

Table of Contents

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