CtrlK
BlogDocsLog inGet started
Tessl Logo

building-mobile-game

Build mobile games and game-like interactive experiences in React Native and Expo. Use when Codex is creating or refactoring arcade, puzzle, casual, action, physics-based, or animation-heavy gameplay, including Expo game setup with the with-reanimated template, sprite-sheet generation and extraction, frame-based animation, touch controls, simple collision and physics loops, score and game-state systems, and cross-platform verification on web plus iOS and Android.

72

Quality

89%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

86%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.

A well-structured, token-efficient skill body that delegates detail to real one-level-deep references and gives concrete, executable guidance with pinned versions and named stacks. The main gap is that verification is expressed as a final checklist gate rather than explicit validate-then-fix-then-retry feedback loops.

Suggestions

Promote the verification step into an explicit validate-fix-retry loop (e.g., 'Run on web and mobile; if frame pacing or collision bugs appear, fix and re-verify before marking done') to strengthen workflow_clarity.

Add a brief inline code snippet or example command for the highest-leverage step (e.g., the exact babel.config.js plugin ordering) so the most error-prone instruction is copy-paste ready.

Consider noting when to re-read a reference versus rely on the quick start, so Claude can tell when detail is mandatory versus optional for a given task.

DimensionReasoningScore

Conciseness

The body is lean and assumes Claude's competence: mandatory reading order, a numbered quick start, terse core rules, a decision guide, and a delivery checklist with no padded concept explanations, so every token earns its place.

5 / 5

Actionability

Provides concrete, executable guidance including pinned versions ('react-native-worklets@0.5.1'), exact babel plugin ordering, named rendering stacks, script paths, and a gameplay build order; stops just short of copy-paste code blocks, which is appropriate for this orchestration-style skill.

4 / 5

Workflow Clarity

A clear mandatory reading order plus a numbered quick-start sequence and a delivery checklist serve as validation checkpoints, and asset work has a split-then-normalize-then-verify path; the validation steps are present but are framed as 'verify before done' rather than explicit validate-fix-retry loops.

4 / 5

Progressive Disclosure

SKILL.md is a concise overview with well-signaled, one-level-deep references to two reference files and two scripts, all of which exist in the bundle, making navigation easy and keeping detail out of the main file.

5 / 5

Total

18

/

20

Passed

Description

92%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.

A strong, concrete description that names a clear niche and enumerates specific capabilities with an explicit 'Use when' trigger clause. Minor upside remains in adding a few more casual synonyms or shorthand phrasings users might say.

Suggestions

Consider adding a few everyday synonyms (e.g., 'game dev', 'make a game', '2D game') alongside the formal genre list to broaden natural trigger coverage.

The reference to 'Codex' ties the description to one client; a client-neutral phrasing ('Use when creating or refactoring...') would keep triggers intact across surfaces.

DimensionReasoningScore

Specificity

Lists multiple concrete actions including 'sprite-sheet generation and extraction', 'frame-based animation', 'touch controls', 'simple collision and physics loops', 'score and game-state systems', and 'cross-platform verification', giving comprehensive coverage of the skill's capabilities.

5 / 5

Completeness

Explicitly answers both 'what' (building mobile games and game-like interactive experiences with enumerated capabilities) and 'when' ('Use when Codex is creating or refactoring...') with concrete trigger phrasing.

5 / 5

Trigger Term Quality

Strong natural trigger terms ('arcade, puzzle, casual, action, physics-based, or animation-heavy gameplay', 'mobile games', 'React Native and Expo') that users would plausibly say, though a few common synonyms or casual phrasings are not covered.

4 / 5

Distinctiveness Conflict Risk

The mobile-game / React-Native / Expo niche with enumerated gameplay types is clearly distinguishable from adjacent UI or data skills and carries minimal wrong-skill trigger risk.

5 / 5

Total

19

/

20

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

referenced_paths_exist

Referenced path issues: 1 missing

Warning

Total

15

/

16

Passed

Repository
Intelligent-Internet/ii-agent
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.