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converting-email-templates

Use when converting or migrating email templates from another provider (SendGrid, Mailgun, Mandrill, Postmark, Brevo, Amazon SES) to Mailtrap-compatible Handlebars syntax. Supports single file, bulk directory, and inline HTML conversion.

Quality

92%

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SecuritybySnyk

Passed

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SKILL.md
Quality
Evals
Security

Quality

Content

85%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 skill body: executable commands, explicit exit-code checkpoints, confirmation gates for risky fixes, and clean separation of detailed rules into a genuine reference file. The main issues are the documented-optional vs. actually-required `--output` flag mismatch and a small amount of duplicated flag-format explanation.

Suggestions

Fix the `--output` inconsistency: the body says the output directory is optional with a `/converted/` default, but `converter.py` requires it — either add the default to the script or mark the flag required in the Input section.

State the FLAGGED comment-wrap format once (e.g., only in the Step 2 note, with the Inline section referencing it) to remove the duplicated explanation.

Consider moving the full six-row API mapping table into `references/` (e.g., `api-field-mapping.md`) and keeping only the "show the relevant row" instruction inline, since only one row is used per conversion.

DimensionReasoningScore

Conciseness

The body is dense and operational (exit-code semantics, flag categories, output formats) with no re-teaching of concepts Claude knows, but the `<!-- FLAGGED [RULE]: message -->` wrapping behavior is explained twice (Step 2 note and Inline step 3) and the presentation templates could be tightened — minor trimmable redundancy, anchor 4 rather than 5.

4 / 5

Actionability

A copy-paste bash invocation with `{skill_dir}` resolution, exact report filenames, per-provider API field names in the mapping table, and concrete flag examples (`formatDate`, `mc:edit`) make this mostly fully executable; the gap is that "Output directory (optional): defaults to a `/converted/` subdirectory" contradicts the script's required `--output` argument — a minor but real executable mismatch, so anchor 4 rather than 5.

4 / 5

Workflow Clarity

The five-step workflow has explicit validation checkpoints (exit codes 0/1/2 branch to different steps, `.report.txt`/`_summary.txt` review), feedback loops for error recovery (flag categorization with re-reading the flagged line and consulting the rules reference), and user-confirmation gates before writing — and the batch-operation cap does not apply because verification is present throughout. Matches anchor 5.

5 / 5

Progressive Disclosure

The SKILL.md stays a workflow overview while bulk conversion patterns live in the real, well-signaled, one-level-deep `references/conversion-rules.md` (referenced at both point-of-use locations) and the deterministic logic in `scripts/converter.py`, which the body invokes without duplicating — clear split with easy navigation, anchor 5.

5 / 5

Total

18

/

20

Passed

Description

95%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 description: explicit "Use when" triggers, named source providers and target syntax, and natural trigger terms throughout. The only weakness is that it describes a single conversion action with its modes rather than enumerating the distinct conversion capabilities it performs.

Suggestions

Enumerate one or two concrete conversion actions (e.g., "rewrites variables, loops, conditionals, and helper syntax") to complement the single convert/migrate verb and lift specificity.

DimensionReasoningScore

Specificity

"converting or migrating email templates ... to Mailtrap-compatible Handlebars syntax" names a concrete action and target, and "Supports single file, bulk directory, and inline HTML conversion" enumerates three concrete modes — several specific capabilities with a minor coverage gap, matching anchor 4 rather than 5 because only one core action (conversion) is described rather than multiple distinct actions.

4 / 5

Completeness

It explicitly answers both questions: the "Use when converting or migrating email templates ... to Mailtrap-compatible Handlebars syntax" clause provides a concrete when/trigger and simultaneously states what the skill does, and the second sentence adds supported input shapes — matching anchor 5's clear what AND when with concrete triggers.

5 / 5

Trigger Term Quality

"converting", "migrating", "email templates", "Mailtrap", "Handlebars", and all six provider names ("SendGrid, Mailgun, Mandrill, Postmark, Brevo, Amazon SES") are exactly the natural terms a user would say when needing this skill, with synonyms (converting/migrating) covered — comprehensive per anchor 5.

5 / 5

Distinctiveness Conflict Risk

It carves out a clear niche (migration to Mailtrap from six named providers) with triggers tied to those specific product names, making it clearly distinguishable from adjacent template-related skills — anchor 5, minimal conflict risk.

5 / 5

Total

19

/

20

Passed

Validation

100%

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

mailtrap/mailtrap-skills

Path

skills/converting-email-templates/SKILL.md

Reviewed

Table of Contents

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