react-native-best-practices

Provides React Native performance optimization guidelines for FPS, TTI, bundle size, memory leaks, re-renders, and animations. Applies to tasks involving Hermes optimization, JS thread blocking, bridge overhead, FlashList, native modules, or debugging jank and frame drops.

Quality

78%

Does it follow best practices?

Impact

Pending

No eval scenarios have been run

Securityby

Advisory

Suggest reviewing before use

Optimize this skill with Tessl

npx tessl skill review --optimize ./config/claude/skills/react-native-best-practices/SKILL.md

Quality

Discovery

100%

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 an excellent skill description that clearly defines its scope (React Native performance optimization), lists specific concrete capabilities and metrics, and provides explicit trigger conditions via the 'Applies to' clause. The rich set of domain-specific keywords ensures accurate skill selection, and the narrow focus on React Native performance makes it highly distinctive.

Dimension	Reasoning	Score
Specificity	Lists multiple specific concrete actions and areas: FPS, TTI, bundle size, memory leaks, re-renders, animations, Hermes optimization, JS thread blocking, bridge overhead, FlashList, native modules, debugging jank and frame drops.	3 / 3
Completeness	Clearly answers both 'what' (provides React Native performance optimization guidelines for specific metrics) and 'when' (applies to tasks involving Hermes optimization, JS thread blocking, bridge overhead, FlashList, native modules, or debugging jank and frame drops). The 'Applies to' clause serves as an explicit trigger guidance.	3 / 3
Trigger Term Quality	Excellent coverage of natural terms a developer would use: 'React Native', 'FPS', 'TTI', 'bundle size', 'memory leaks', 're-renders', 'animations', 'Hermes', 'JS thread blocking', 'bridge overhead', 'FlashList', 'native modules', 'jank', 'frame drops'. These are highly specific and natural keywords.	3 / 3
Distinctiveness Conflict Risk	Highly distinctive niche targeting React Native performance specifically, with very specific trigger terms like 'Hermes', 'FlashList', 'bridge overhead', 'jank', and 'frame drops' that are unlikely to conflict with other skills.	3 / 3
	Total	12 / 12 Passed

Implementation

57%

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

This is a well-structured index/overview skill that excels at progressive disclosure and navigation across a large set of reference files. Its main weakness is that the overview itself is light on directly actionable, executable content—most concrete guidance is deferred to reference files. The skill could be tightened by removing meta-sections (Skill Format, When to Apply) and adding more inline executable examples in the Quick Reference sections.

Suggestions

Add executable code examples to the Quick Reference sections (e.g., a FlashList replacement snippet, a Reanimated worklet example) instead of just listing bullet-point fixes.

Remove or condense the 'Skill Format' and 'When to Apply' sections—Claude can infer when to apply these guidelines from context, and the format description is meta-information about reference files that doesn't help with the task.

Add validation/verification steps to the Quick Reference workflows (e.g., 'After applying fix, re-measure FPS to confirm improvement' or 'Verify bundle size reduction with source-map-explorer').

Dimension	Reasoning	Score
Conciseness	The skill is reasonably efficient but includes some unnecessary framing (e.g., the 'Skill Format' section explaining the reference file format, the 'When to Apply' section listing obvious triggers). The reference tables are useful but verbose given the large number of files listed. The grep examples for searching references add marginal value.	2 / 3
Actionability	Provides some concrete commands (bundle analysis, grep searches) and specific fix recommendations, but most guidance is at the 'pointer' level—directing to reference files rather than providing executable solutions inline. The Quick Reference sections list fixes as bullet points without executable code examples for most items.	2 / 3
Workflow Clarity	The Problem → Skill Mapping table provides clear diagnostic workflows with sequenced steps (measure → analyze → fix). However, there are no explicit validation checkpoints or feedback loops for any of the optimization processes. For performance optimization (which can involve destructive changes like bundle configuration), verification steps are missing.	2 / 3
Progressive Disclosure	Excellent progressive disclosure structure: concise overview with quick reference patterns inline, well-organized reference tables pointing to one-level-deep detail files, clear categorization (js-, native-, bundle-*), and a problem-to-skill mapping for navigation. References are clearly signaled and organized.	3 / 3
	Total	9 / 12 Passed

Validation

90%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 10 / 11 Passed

Validation for skill structure

Criteria	Description	Result
metadata_version	'metadata.version' is missing	Warning

	Total	10 / 11 Passed

Repository: freekmurze/dotfiles
Commit: 2c6f6e8

Reviewed: 3 days ago

Table of Contents

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