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wb-preview-url-modifier

Covers the PreviewUrlModifier extension point in Website Builder. Use when a user wants to inject custom query parameters into live preview URLs — e.g. signed tokens, tenant identifiers, feature flags — from their Webiny project. Handles the full registration pattern: implementing the interface, wiring via createFeature + RegisterFeature, and registering via webiny.config.tsx. Supports async modifier methods (e.g. remote token fetch).

74

Quality

92%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

100%

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

The body is lean, highly actionable, and well-structured with executable examples and a clear registration sequence; no meaningful weaknesses found across the dimensions.

DimensionReasoningScore

Conciseness

Lean and token-efficient: a short TL;DR, two purposeful code blocks (the second earns its place by demonstrating async remote fetch), a compact surfaces table, and brief Constraints/Related Skills — no padding explaining concepts Claude already knows.

3 / 3

Actionability

Provides fully executable, copy-paste-ready guidance: interface implementation with imports, createImplementation({implementation, dependencies}), createFeature + RegisterFeature, and webiny.config.tsx wiring.

3 / 3

Workflow Clarity

Clear ordered sequence (Implement the Modifier → Register the Feature → webiny.config.tsx); this is a simple, non-destructive registration task so the unambiguous single-action sequence scores 3 without needing validation checkpoints.

3 / 3

Progressive Disclosure

A single well-organized file with clearly labeled sections and no oversized content warranting a split; Related Skills supplies sibling navigation and no bundle files are needed.

3 / 3

Total

12

/

12

Passed

Description

85%

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 specific, complete, and distinctive description that clearly states capability and trigger; its main weakness is a jargon-heavy lead that dilutes the natural trigger-term phrasing a user would say.

Suggestions

Lead with the user-facing goal (injecting custom query params into preview URLs) before the technical extension-point name, so a user's natural phrasing matches the description.

Add common layperson variations such as 'preview link', 'add parameters to preview URLs', or 'preview query string' alongside 'live preview URLs'.

Move deep implementation jargon ('createFeature + RegisterFeature', 'webiny.config.tsx') out of the description and into the body to keep the trigger phrasing natural.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'inject custom query parameters into live preview URLs', 'implementing the interface, wiring via createFeature + RegisterFeature, registering via webiny.config.tsx', and 'async modifier methods (e.g. remote token fetch)' — matching the anchor for multiple specific concrete actions.

3 / 3

Completeness

Explicitly answers both what ('Covers the PreviewUrlModifier extension point... Handles the full registration pattern') and when ('Use when a user wants to inject custom query parameters into live preview URLs'), in third-person voice.

3 / 3

Trigger Term Quality

Contains some natural user-facing terms ('inject custom query parameters', 'live preview URLs', 'signed tokens', 'tenant identifiers', 'feature flags'), but the lead is jargon-heavy ('PreviewUrlModifier extension point', 'createFeature + RegisterFeature', 'webiny.config.tsx') and misses common variations a user might actually say.

2 / 3

Distinctiveness Conflict Risk

Targets a narrow, well-defined niche — PreviewUrlModifier in Website Builder live preview URLs — making it unlikely to trigger for unrelated skills.

3 / 3

Total

11

/

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
webiny/webiny-js
Reviewed

Table of Contents

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