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vercel-react-native-skills

React Native and Expo best practices for building performant mobile apps. Use when building React Native components, optimizing list performance, implementing animations, or working with native modules. Triggers on tasks involving React Native, Expo, mobile performance, or native platform APIs.

71

2.15x
Quality

56%

Does it follow best practices?

Impact

99%

2.15x

Average score across 3 eval scenarios

SecuritybySnyk

Passed

No known issues

Fix and improve this skill with Tessl

tessl review fix ./skills/react-native-skills/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

22%

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

This skill functions as a table of contents or index rather than an actionable skill document. It categorizes and lists rule names with one-line descriptions but provides zero executable code, concrete examples, or workflow guidance. All substantive content is deferred to external files that are not included in the bundle, making the skill largely inert on its own.

Suggestions

Add at least one concrete, executable code example per high-priority category (e.g., a FlashList usage example for list performance, a Reanimated snippet for animations) so the skill is actionable without requiring external files.

Include a brief workflow or decision tree for common tasks, such as 'When optimizing a slow list: 1. Switch to FlashList, 2. Memoize items with React.memo, 3. Extract callbacks with useCallback, 4. Profile with Flipper to verify improvement.'

Remove or condense the 'When to Apply' and 'How to Use' sections—Claude doesn't need to be told when React Native rules apply or what a rule file contains. Use that space for actual guidance.

Provide the referenced bundle files (rule .md files or AGENTS.md) or inline the most critical rules so the skill has standalone value.

DimensionReasoningScore

Conciseness

The content is reasonably organized but includes some unnecessary framing (e.g., 'Comprehensive best practices' intro, 'When to Apply' section that restates obvious triggers). The priority table and quick reference lists are efficient, but the overall structure could be tighter—the 'Each rule file contains' bullet list and 'How to Use' section add little value for Claude.

2 / 3

Actionability

The skill provides no executable code, no concrete commands, and no specific examples. It is entirely an index/catalog of rule names with brief descriptions. All actual guidance is deferred to external rule files that are not provided in the bundle, making this skill essentially a table of contents with no actionable content on its own.

1 / 3

Workflow Clarity

There is no workflow, sequence, or process described. The skill is a flat reference index with no multi-step guidance, no validation checkpoints, and no procedural instructions for how to apply these rules when building or optimizing a React Native app.

1 / 3

Progressive Disclosure

The skill attempts progressive disclosure by referencing individual rule files and a compiled AGENTS.md, with a clear categorization structure. However, no bundle files are provided, so the referenced paths (rules/*.md, AGENTS.md) cannot be verified. The references are one-level deep and clearly signaled, but the SKILL.md itself contains almost no substantive content—it's nearly all pointers with nothing actionable at the top level.

2 / 3

Total

6

/

12

Passed

Description

89%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

This is a solid skill description that clearly identifies its domain (React Native/Expo), provides explicit trigger guidance with both 'Use when' and 'Triggers on' clauses, and is distinctive enough to avoid conflicts with other skills. The main weakness is that the capability descriptions are somewhat categorical rather than listing specific concrete actions, which slightly reduces specificity.

Suggestions

Add more specific concrete actions such as 'optimize FlatList rendering, configure Reanimated animations, bridge native modules, set up Expo config plugins' to increase specificity.

DimensionReasoningScore

Specificity

Names the domain (React Native/Expo) and mentions some actions like 'building components', 'optimizing list performance', 'implementing animations', 'working with native modules', but these are somewhat general categories rather than multiple specific concrete actions (e.g., doesn't specify FlatList optimization, Reanimated usage, bridging patterns, etc.).

2 / 3

Completeness

Clearly answers both 'what' (best practices for building performant mobile apps with React Native/Expo) and 'when' (explicit 'Use when...' clause covering components, list performance, animations, native modules, plus a 'Triggers on...' clause with additional terms).

3 / 3

Trigger Term Quality

Good coverage of natural terms users would say: 'React Native', 'Expo', 'mobile performance', 'native modules', 'animations', 'list performance', 'native platform APIs'. These are terms developers would naturally use when seeking help with mobile app development.

3 / 3

Distinctiveness Conflict Risk

Clearly scoped to React Native and Expo mobile development, which is a distinct niche. The specific mention of native modules, Expo, and mobile performance makes it unlikely to conflict with general React web development or other frontend skills.

3 / 3

Total

11

/

12

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.

Validation11 / 11 Passed

Validation for skill structure

No warnings or errors.

Repository
vercel-labs/agent-skills
Reviewed

Table of Contents

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