mobile-app-builder

Builds native iOS and Android apps, creates cross-platform mobile applications using React Native or Flutter, configures mobile build systems, and debugs platform-specific issues including crashes, permissions, and store rejections. Use when the user asks about mobile app development, iOS or Android projects, Swift, SwiftUI, Kotlin, Jetpack Compose, React Native, Flutter, mobile UI design, push notifications, offline sync, in-app purchases, .ipa or .apk builds, or app store submission.

Quality

88%

Does it follow best practices?

Impact

—

No eval scenarios have been run

Securityby

Passed

No known issues

Quality

Content

77%

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

This is a solid, comprehensive mobile development skill with strong actionability through executable code examples across four frameworks and well-defined validation checkpoints. Its main weaknesses are moderate verbosity (some generic advice Claude doesn't need) and a monolithic structure that would benefit from splitting platform-specific details into referenced files. The workflow is well-sequenced with appropriate validation steps for a complex, multi-platform domain.

Suggestions

Move platform-specific scaffolds (SwiftUI, Compose, RN, Flutter) into separate referenced files to reduce the main skill's token footprint and improve progressive disclosure.

Remove generic advice Claude already knows (e.g., 'based on team skills, performance needs, and maintenance horizon') and the framework decision tree, which is standard knowledge.

Dimension	Reasoning	Score
Conciseness	Generally efficient but includes some unnecessary guidance Claude already knows (e.g., 'Confirm framework choice based on team skills, performance needs, and maintenance horizon' is generic advice). The framework decision tree in step 6 feels misplaced and somewhat redundant with step 1. Some bullet points could be tightened.	2 / 3
Actionability	Provides fully executable code scaffolds for SwiftUI, Jetpack Compose, React Native, and Flutter, along with concrete CLI commands for building, testing, and profiling. The checklists are specific and actionable rather than vague.	3 / 3
Workflow Clarity	Clear 6-step sequential workflow with explicit validation checkpoints in step 5 (checklist with specific criteria like startup time, memory leaks, permission paths) and a release checklist in step 6. The 'deny' and 'never ask again' permission testing and offline corruption checks demonstrate proper feedback loops for risky operations.	3 / 3
Progressive Disclosure	The content is well-structured with clear sections, but it's fairly long and monolithic. Step 4 mentions 'consider dedicated reference files per topic' but doesn't actually link to any. Platform-specific scaffolds and release checklists could be split into referenced files to keep the main skill leaner.	2 / 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.

This is an excellent skill description that covers all dimensions well. It provides specific concrete actions, comprehensive trigger terms spanning both native and cross-platform mobile development, an explicit 'Use when...' clause, and a clearly distinct niche. The description uses proper third-person voice throughout and balances comprehensiveness with clarity.

Dimension	Reasoning	Score
Specificity	Lists multiple specific concrete actions: builds native iOS/Android apps, creates cross-platform apps using React Native/Flutter, configures mobile build systems, and debugs platform-specific issues including crashes, permissions, and store rejections.	3 / 3
Completeness	Clearly answers both 'what' (builds native apps, creates cross-platform apps, configures build systems, debugs platform-specific issues) and 'when' with an explicit 'Use when...' clause listing numerous specific trigger scenarios.	3 / 3
Trigger Term Quality	Excellent coverage of natural terms users would say: iOS, Android, Swift, SwiftUI, Kotlin, Jetpack Compose, React Native, Flutter, mobile UI design, push notifications, offline sync, in-app purchases, .ipa, .apk, app store submission. These are all terms a developer would naturally use.	3 / 3
Distinctiveness Conflict Risk	Clearly carved out niche around mobile app development with highly specific triggers like iOS, Android, Swift, SwiftUI, Kotlin, Flutter, React Native, .ipa, .apk, and app store submission. Unlikely to conflict with web development or general coding skills.	3 / 3
	Total	12 / 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
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	10 / 11 Passed

Repository: OpenRoster-ai/awesome-agents
Commit: 010799b

Reviewed: 3 months ago

Table of Contents

Discovery Implementation Validation

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