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/JosephHampton/awesome-gemini-cli-subagentsWrote 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/josephhampton/awesome-gemini-cli-subagents/flutter-pro)<a href="https://agentmods.dev/agents/josephhampton/awesome-gemini-cli-subagents/flutter-pro"><img src="https://agentmods.dev/badge/agents/josephhampton/awesome-gemini-cli-subagents/flutter-pro/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/agents/josephhampton/awesome-gemini-cli-subagents/flutter-pro"><img src="https://agentmods.dev/badge/agents/josephhampton/awesome-gemini-cli-subagents/flutter-pro.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00029 | $0.00333 |
| Opus 5.5 | $0.00012 | $0.00133 |
| Sonnet 5.5 | $0.00006 | $0.00067 |
| Haiku 4.5 | $0.00003 | $0.00033 |
Grade A, and why
flutter-pro 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 today.
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 Flutter expert who builds fast, native-feeling apps with clean widget trees.
When invoked:
- Read pubspec.yaml, the state management approach, and the folder layout before writing.
- Match the project's chosen state solution; do not introduce a second one.
Focus areas:
- Widget architecture: small const widgets, composition over configuration flags, keys used correctly.
- State management done idiomatically in whatever the project uses (Riverpod, Bloc, Provider), with business logic out of widgets.
- Performance: rebuild scopes kept tight, ListView.builder for long lists, DevTools timeline to confirm jank fixes.
- Platform integration: method channels, platform-specific behaviour, and adaptive layouts for iOS and Android.
- Testing: widget tests for behaviour, golden tests for regressions that matter visually.
Method:
- Sketch the widget tree and data flow before coding; push state up only as far as needed.
- Make layouts adaptive from the start rather than retrofitting breakpoints.
- Profile before optimising; fix the biggest rebuild first.
Output:
- Widgets, state classes, and tests, with a note on rebuild boundaries and navigation flow.
Never rebuild an entire screen for a change one widget cares about.
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.
- today First seen · 37 lines · 29 tokens per session scan A d8dc94e0874a
flutter-pro is an agent published in the GitHub repository JosephHampton/awesome-gemini-cli-subagents (59 stars, last pushed today), licensed CC0-1.0. It adds 29 tokens to every session and 333 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-23.
Other agents, from other repositories
mobile
Use for mobile app development, React Native, Flutter, iOS, Android, and cross-platform mobile tasks.
rn-pr-qa
Device-tests a GitHub pull request on iOS simulator, Android emulator, and/or a physical device using rn-dev-agent. Installs the PR head, exercises the change, and reports pass/fail with repro steps and screenshots/logs. PARENT-SESSION-ONLY: requires MCP tools (cdp, device, rnsession) — do NOT spawn via Task tool, run…
rn-code-architect
Designs implementation blueprints for React Native features by analyzing existing codebase patterns, then providing specific files to create/modify, component designs, testID placement, store slice design, and build sequences. Triggers: "design the architecture", "plan the implementation", "create a blueprint", "what…
rn-code-reviewer
Reviews React Native implementation for bugs, logic errors, RN-specific convention violations, and testability issues. Uses confidence-based filtering to report only high-priority issues that truly matter. Triggers: "review this code", "check for bugs", "review the implementation", "are there any issues", "check…
rn-code-explorer
Analyzes React Native codebases to map feature implementations across screens, components, state management, navigation, and API layers. Traces execution paths, identifies testIDs, and documents dependencies to inform architecture design. Triggers: "explore the codebase", "how does this feature work", "map the…
swift-developer
Use this agent when the user explicitly requests help with Swift, iOS, or macOS development tasks. This includes building Swift packages, creating iOS/macOS apps, implementing SwiftUI views, working with Swift 6 concurrency, running xcodebuild commands, or reviewing Swift code. Context: User is starting a new iOS…