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designing-email-templates

Author, save, and edit email templates in the PostHog workflows library — compose email design JSON with Liquid personalization and create and round-trip-edit templates over MCP. Use when asked to design, build, update, or fix an email template for workflows, broadcasts, or campaigns.

76

Quality

96%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

92%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.

The body is a well-structured, executable guide with concrete tool calls, numbered workflows with validation checkpoints, and clean one-level-deep references to real bundle files. It is nearly maximally concise, with only minor explanatory phrasing that could be trimmed.

Suggestions

Trim parenthetical asides like 'the design document format is an internal implementation detail' that restate context Claude can infer.

The 'Payload mechanics' paragraph bundles several rules; consider a short bullet list so each escaping/JSON rule is scannable.

DimensionReasoningScore

Conciseness

Mostly lean and assumes Claude's competence, but a few sentences could be trimmed (e.g. 'the design document format is an internal implementation detail', 'Plain-text fallback of the same message' is fine but several explanatory bullets edge toward over-explanation).

4 / 5

Actionability

Fully executable guidance throughout: a copy-paste-ready create payload, concrete Liquid/unsubscribe snippets, click-tracking markers, and exact tool names for every create/edit/patch/list workflow.

5 / 5

Workflow Clarity

Multi-step read-modify-write and workflow-step editing flows are explicitly numbered with clear sequence, and include verification checkpoints (fetch fresh source of truth, render preview via workflows-show-email-template, test-run with use_draft=true before publish).

5 / 5

Progressive Disclosure

Clear overview in SKILL.md with two well-signaled one-level-deep references ([references/design-guidelines.md], [references/unlayer-design-json.md]) that both exist as real files; bulk schema/design detail is appropriately split out and navigable.

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.

The description is concise yet comprehensive, naming concrete actions, natural trigger terms, and a clear PostHog workflows niche with both 'what' and 'when' explicitly addressed. It uses appropriate third-person voice throughout with no fluff or over-claims.

DimensionReasoningScore

Specificity

Lists multiple concrete actions ('Author, save, and edit email templates', 'compose email design JSON with Liquid personalization', 'create and round-trip-edit templates over MCP') with comprehensive coverage of the skill's capabilities.

5 / 5

Completeness

Explicitly answers both what ('Author, save, and edit email templates ... compose email design JSON with Liquid personalization and create and round-trip-edit templates over MCP') and when ('Use when asked to design, build, update, or fix an email template for workflows, broadcasts, or campaigns') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Comprehensive natural trigger phrases users would say ('design, build, update, or fix an email template') plus domain terms (workflows, broadcasts, campaigns, Liquid, MCP) with strong synonym coverage.

5 / 5

Distinctiveness Conflict Risk

Clear niche scoped to PostHog workflows email templates with distinct triggers (MCP, Liquid, workflows library); minimal conflict risk with other skills.

5 / 5

Total

20

/

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.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
PostHog/posthog
Reviewed

Table of Contents

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