CtrlK
BlogDocsLog inGet started
Tessl Logo

react-native-expert

Senior React Native and Expo engineer for building production-ready cross-platform mobile apps. Use when building React Native components, implementing navigation with Expo Router, optimizing list and scroll performance, working with animations via Reanimated, handling platform-specific code (iOS/Android), integrating native modules, or structuring Expo projects. Triggers on React Native, Expo, mobile app, iOS app, Android app, cross-platform, native module, FlatList, FlashList, LegendList, Reanimated, Expo Router, mobile performance, app store. Do NOT use for Flutter, web-only React, or backend Node.js tasks.

70

Quality

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Passed

No known issues

SKILL.md
Quality
Evals
Security

Quality

Content

72%

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

The body is highly actionable with strong progressive disclosure and verified reference files, but it is held back by time-sensitive version information outside a deprecated section and a workflow that lacks explicit feedback-loop checkpoints. Tightening dated info and adding validate→fix→retry steps would raise the weakest dimensions.

Suggestions

Move the 'Technology Stack (2026)' version/date table and inline version pins into a dedicated 'Current versions' or 'deprecated/old patterns' section so time-sensitive info does not penalize conciseness and ages more gracefully.

Add explicit feedback-loop checkpoints to the Workflow (e.g. under Test: 'If Perf Monitor drops frames, profile the list item and re-apply the virtualizer/stable-reference rules, then re-measure') to reach the top workflow-clarity anchor.

Trim the generic 'Core Principles' advice (e.g. 'Simplicity first', 'Surgical changes') that Claude already knows, or scope each principle to a concrete RN-specific consequence.

DimensionReasoningScore

Conciseness

Mostly efficient and RN-specific (crash patterns, .get()/.set(), native tabs), but it carries time-sensitive version/date info — a 'Technology Stack (2026)' table with SDK 53+, RN 0.79+, React 19 — that is not placed in an 'old patterns'/'deprecated' section, and the 'Core Principles' section states generic engineering advice Claude already knows. Not level 3 because token budget is compromised by dated info and generic principles; not level 1 because it avoids explaining basic programming concepts.

2 / 3

Actionability

Provides multiple complete, copy-paste-ready examples — LegendList usage, useAnimatedStyle with transform/opacity, expo-image with blurhash, NativeTabs, and modern styling snippets — all executable rather than pseudocode.

3 / 3

Workflow Clarity

The five-step Workflow (Setup → Structure → Implement → Optimize → Test) is clearly sequenced and includes a Test/verify step, but it lacks explicit feedback-loop checkpoints (fail → fix → retry) of the kind the top anchor expects. Not level 3 because validation/feedback loops are implicit rather than spelled out; not level 1 because the sequence and a verification step are present.

2 / 3

Progressive Disclosure

A Reference Guide table maps each topic to a real, verified reference file (all five exist in references/) with a 'Load When' navigation column, keeping references one level deep and well-signaled — matching the clear-overview-plus-one-level-deep-references anchor.

3 / 3

Total

10

/

12

Passed

Description

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.

The description is concrete, trigger-rich, and explicitly answers both what the skill does and when to use it, with a clear exclusion clause that sharpens distinctiveness. It uses the accepted third-person/imperative 'Use when' form with no first/second-person voice issues. No changes needed.

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions such as 'building React Native components, implementing navigation with Expo Router, optimizing list and scroll performance, working with animations via Reanimated, handling platform-specific code (iOS/Android), integrating native modules, or structuring Expo projects' — a comprehensive, concrete action set rather than vague language.

3 / 3

Completeness

Clearly answers both what (the opening capability sentence) and when via an explicit 'Use when ...' clause plus a 'Triggers on ...' list, satisfying the top anchor rather than leaving 'when' only implied.

3 / 3

Trigger Term Quality

'Triggers on React Native, Expo, mobile app, iOS app, Android app, cross-platform, native module, FlatList, FlashList, LegendList, Reanimated, Expo Router, mobile performance, app store' covers natural terms a user would actually say, including both layperson ('mobile app', 'iOS app') and practitioner phrasings.

3 / 3

Distinctiveness Conflict Risk

A clear React Native/Expo niche with distinct triggers, reinforced by an explicit exclusion — 'Do NOT use for Flutter, web-only React, or backend Node.js tasks' — making conflict with adjacent skills unlikely.

3 / 3

Total

12

/

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.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
tech-leads-club/agent-skills
Reviewed

Table of Contents

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.