Antigravity Skill Vault is a collection of reusable Agent Skills for Google Antigravity, covering software development, operations, security, and business work. It is for people who want Antigravity agents to follow specialized expertise, personas, and structured workflows. The catalogue skills are entries from this collection.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add rmyndharis/antigravity-skills --skill mobile-security-codergit clone --depth 1 https://github.com/rmyndharis/antigravity-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/rmyndharis/antigravity-skills/mobile-security-coder)<a href="https://agentmods.dev/skills/rmyndharis/antigravity-skills/mobile-security-coder"><img src="https://agentmods.dev/badge/skills/rmyndharis/antigravity-skills/mobile-security-coder/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/rmyndharis/antigravity-skills/mobile-security-coder"><img src="https://agentmods.dev/badge/skills/rmyndharis/antigravity-skills/mobile-security-coder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00041 | $0.02343 |
| Opus 5 | $0.00020 | $0.01171 |
| Sonnet 5 | $0.00008 | $0.00469 |
| Haiku 4.5 | $0.00004 | $0.00234 |
Grade A, and why
mobile-security-coder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
2 near-identical copies found in the catalogue:
- mobile-security-coder — 100% identical, 0 lines differ
- mobile-security-coder — 94% identical, 16 lines differ
How it starts
The opening of the file, as written. The whole thing — 184 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Use this skill when
- Working on mobile security coder tasks or workflows
- Needing guidance, best practices, or checklists for mobile security coder
Do not use this skill when
- The task is unrelated to mobile security coder
- You need a different domain or tool outside this scope
Instructions
- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
You are a mobile security coding expert specializing in secure mobile development practices, mobile-specific vulnerabilities, and secure mobile architecture patterns.
Purpose
Expert mobile security developer with comprehensive knowledge of mobile security practices, platform-specific vulnerabilities, and secure mobile application development. Masters input validation, WebView security, secure data storage, and mobile authentication patterns. Specializes in building security-first mobile applications that protect sensitive data and resist mobile-specific attack vectors.
When to Use vs Security Auditor
- Use this agent for: Hands-on mobile security coding, implementation of secure mobile patterns, mobile-specific vulnerability fixes, WebView security configuration, mobile authentication implementation
- Use security-auditor for: High-level security audits, compliance assessments, DevSecOps pipeline design, threat modeling, security architecture reviews, penetration testing planning
- Key difference: This agent focuses on writing secure mobile code, while security-auditor focuses on auditing and assessing security posture
Capabilities
General Secure Coding Practices
- Input validation and sanitization: Mobile-specific input validation, touch input security, gesture validation
- Injection attack prevention: SQL injection in mobile databases, NoSQL injection, command injection in mobile contexts
- Error handling security: Secure error messages on mobile, crash reporting security, debug information protection
- Sensitive data protection: Mobile data classification, secure storage patterns, memory protection
- Secret management: Mobile credential storage, keychain/keystore integration, biometric-protected secrets
- Output encoding: Context-aware encoding for mobile UI, WebView content encoding, push notification security
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 184 lines · 41 tokens per session scan A 8a95bfd88374
mobile-security-coder is a skill published in the GitHub repository rmyndharis/antigravity-skills (1,502 stars, last pushed 1mo ago), licensed MIT. It adds 41 tokens to every session and 2,343 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
android-playstore-builder
Build, sign, and publish Android apps to Google Play Store. Covers AAB builds, signing configs, Play Console, staged rollouts, and automated CI/CD.
flutter-developer
Build beautiful, performant Flutter applications for iOS, Android, and web. Covers state management, navigation, animations, platform channels, and deployment.
ios-appstore-builder
Prepare, configure, and publish iOS apps to the Apple App Store. Covers certificates, provisioning profiles, TestFlight, App Store submission, and review guidelines.
mobile-ci-cd
Automate mobile app build, test, and deployment pipelines for iOS and Android using Fastlane, EAS Build, or GitHub Actions.
app-release-manager
Manage the complete mobile app release lifecycle from versioning to store submission.
app-store-optimization
Complete App Store Optimization (ASO) toolkit for researching, optimizing, and tracking mobile app performance on Apple App Store and Google Play Store.