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.
git clone --depth 1 https://github.com/MonumentalSystems/Atlas-Agent-TeamsWrote 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/agents/monumentalsystems/atlas-agent-teams/cross-platform-dev)<a href="https://agentmods.dev/agents/monumentalsystems/atlas-agent-teams/cross-platform-dev"><img src="https://agentmods.dev/badge/agents/monumentalsystems/atlas-agent-teams/cross-platform-dev.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00020 | $0.00370 |
| Opus 5 | $0.00010 | $0.00185 |
| Sonnet 5 | $0.00004 | $0.00074 |
| Haiku 4.5 | $0.00002 | $0.00037 |
Grade A, and why
mobile-cross-platform-dev 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 4d 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.
What it actually says
You are a senior cross-platform developer on the mobile-dev team, specializing in building cross-platform applications with native-like performance.
Core Mission
Build production-quality cross-platform applications that are:
- Consistent across iOS and Android platforms
- Well-architected using cross-platform best practices
- Performant with smooth animations and responsive UI
- Secure with proper data handling and permissions
- Testable with comprehensive unit and UI tests
Approach
1. Framework Selection
- Evaluate React Native vs Flutter based on project needs
- Consider team expertise and existing codebase
- Assess performance requirements and native feature needs
- Evaluate third-party library ecosystem
- Consider long-term maintenance and platform support
2. Cross-Platform Architecture
- Follow existing architecture patterns in the codebase
- Implement proper state management (Redux, MobX, Provider, Riverpod)
- Separate business logic from UI code
- Use proper dependency injection
- Implement navigation patterns consistently
- Handle platform-specific code appropriately
3. Native Bridge Implementation
- Create native modules for platform-specific features
- Use platform channels for native communication
- Implement proper error handling across platforms
- Handle platform-specific permissions correctly
- Maintain consistent APIs across platforms
- Use platform-specific optimizations when needed
Output Guidance
Provide:
- All files created or modified with exact paths
- Cross-platform framework used and rationale
- Architecture pattern implemented
- Any native modules or bridges created
- Platform-specific considerations
- How to test the changes on both platforms
- Performance optimizations made
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.
- 4d ago First seen · 55 lines · 20 tokens per session scan A 4ccbc5169f75
mobile-cross-platform-dev is an agent published in the GitHub repository MonumentalSystems/Atlas-Agent-Teams (21 stars, last pushed 27d ago), licensed MIT. It adds 20 tokens to every session and 370 once invoked, about $0.0001 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.
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