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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).

73

Quality

90%

Does it follow best practices?

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SKILL.md
Quality
Evals
Security

Quality

Content

93%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 tight, executable reference: it opens with a TL;DR, gives complete code for both basic and async cases, registers the feature, scopes where it applies, and lists hard constraints. The only minor gap is the absence of an explicit validation step, which is not strictly required for this non-destructive extension task.

DimensionReasoningScore

Conciseness

Lean and efficient: a TL;DR, two focused code examples, a short surface table, and tight constraint/related-skill lists, with no padding or explanation of concepts Claude already knows.

5 / 5

Actionability

Provides fully executable, copy-paste-ready TypeScript/TSX covering both the basic and async-token cases, with exact import paths and the webiny.config.tsx wiring snippet.

5 / 5

Workflow Clarity

The implement → register → wire sequence is clear and the Constraints section acts as guardrails, but there is no explicit validation/verification checkpoint, so it does not reach the score-5 anchor.

4 / 5

Progressive Disclosure

A single-purpose skill under ~80 lines with well-organized sections (TL;DR, Implement, Register, Where It Applies, Constraints, Related Skills) and only one-level-deep pointers to related skills — no bundle files needed.

5 / 5

Total

19

/

20

Passed

Description

87%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 strong: it names a concrete niche, lists specific registration actions, and provides an explicit 'Use when' trigger with example parameters. It uses correct third-person voice throughout and avoids fluff.

DimensionReasoningScore

Specificity

Lists several concrete actions — 'implementing the interface, wiring via createFeature + RegisterFeature, and registering via webiny.config.tsx' plus 'inject custom query parameters' and async support — with only minor coverage gaps, fitting the score-4 anchor rather than the fully comprehensive score-5.

4 / 5

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') with concrete trigger phrases and examples.

5 / 5

Trigger Term Quality

Includes natural trigger phrases users would say ('inject custom query parameters into live preview URLs', 'signed tokens, tenant identifiers, feature flags') with good coverage, but a few synonymous natural terms are missing, so it sits at 4 rather than 5.

4 / 5

Distinctiveness Conflict Risk

Targets a very specific niche — the PreviewUrlModifier extension point in Website Builder — with distinct, narrow triggers and minimal overlap risk with other skills.

5 / 5

Total

18

/

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
webiny/webiny-js
Reviewed

Table of Contents

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