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 mdazadhossain95/flutter-agent-skills --skill flutter-building-pluginsgit clone --depth 1 https://github.com/mdazadhossain95/flutter-agent-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/mdazadhossain95/flutter-agent-skills/flutter-building-plugins)<a href="https://agentmods.dev/skills/mdazadhossain95/flutter-agent-skills/flutter-building-plugins"><img src="https://agentmods.dev/badge/skills/mdazadhossain95/flutter-agent-skills/flutter-building-plugins/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/mdazadhossain95/flutter-agent-skills/flutter-building-plugins"><img src="https://agentmods.dev/badge/skills/mdazadhossain95/flutter-agent-skills/flutter-building-plugins.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 | $0.00033 | $0.01866 |
| Opus 5.5 | $0.00013 | $0.00746 |
| Sonnet 5.5 | $0.00007 | $0.00373 |
| Haiku 4.5 | $0.00003 | $0.00187 |
Grade A, and why
flutter-building-plugins 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 1mo 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.
This is a copy
95% identical to flutter-building-plugins — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Developing Flutter Plugins
Contents
- Architecture & Design Patterns
- Workflow: Creating a New Plugin
- Workflow: Implementing Android Platform Code
- Workflow: Implementing Windows Platform Code
- Workflow: Adding Platforms to an Existing Plugin
- Examples
Architecture & Design Patterns
Federated Plugins
Implement federated plugins to split a plugin's API across multiple packages, allowing independent teams to build platform-specific implementations. Structure federated plugins into three distinct components:
- App-facing interface: The primary package users depend on. It exports the public API.
- Platform interface: The package defining the common interface that all platform implementations must implement.
- Platform implementations: Independent packages containing platform-specific code (e.g.,
my_plugin_android,my_plugin_windows).
FFI vs. Standard Plugins
Choose the correct plugin template based on your native interoperability requirements:
- Standard Plugins (
--template=plugin): Use for accessing platform-specific APIs (e.g., Android SDK, iOS frameworks) via Method Channels. - FFI Plugins (
--template=plugin_ffi): Use for accessing C/C++ native libraries, configuring Google Play services on Android, or using static linking on iOS/macOS.- Constraint: FFI plugin packages support bundling native code and method channel registration code, but not method channels themselves. If you require both method channels and FFI, use the standard non-FFI plugin template.
Workflow: Creating a New Plugin
Follow this workflow to initialize a new plugin package.
Task Progress:
- Determine if the plugin requires FFI or standard Method Channels.
- Execute the appropriate
flutter createcommand. - Verify the generated directory structure.
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.
- 1mo ago First seen · 207 lines · 33 tokens per session scan A ebb4ab629e5c
flutter-building-plugins is a skill published in the GitHub repository mdazadhossain95/flutter-agent-skills (2 stars, last pushed 3mo ago), licensed MIT. It adds 33 tokens to every session and 1,866 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 95% identical to flutter-building-plugins, differing in 8 lines, and is treated as a copy.
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