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 Poorgramer-Zack/dart-expert-skills --skill flutter-social-authgit clone --depth 1 https://github.com/Poorgramer-Zack/dart-expert-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/poorgramer-zack/dart-expert-skills/flutter-social-auth)<a href="https://agentmods.dev/skills/poorgramer-zack/dart-expert-skills/flutter-social-auth"><img src="https://agentmods.dev/badge/skills/poorgramer-zack/dart-expert-skills/flutter-social-auth/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/poorgramer-zack/dart-expert-skills/flutter-social-auth"><img src="https://agentmods.dev/badge/skills/poorgramer-zack/dart-expert-skills/flutter-social-auth.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 | $0.00117 | $0.00690 |
| Opus 5 | $0.00059 | $0.00345 |
| Sonnet 5 | $0.00023 | $0.00138 |
| Haiku 4.5 | $0.00012 | $0.00069 |
Grade A, and why
implementing-flutter-social-auth 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flutter Social Authentication Guide
Goal
Implement secure, high-quality social authentication in Flutter applications across iOS, Android, and Web. This skill focuses on the most common identity providers (Google, Facebook, Apple) using best-practice plugins and native configuration strategies to ensure a seamless "Privacy-First" user experience.
Process
Phase 1: Provider Selection & Requirements
Identify the required social providers and gather necessary developer portal credentials.
- Google: Google Cloud Console / Firebase Console (SHA-1 fingerprint required for Android).
- Facebook: Meta for Developers (App ID, Client Token).
- Apple: Apple Developer Program (Service ID, Team ID, Key ID).
- LINE: LINE Developers Console (Channel ID).
Phase 2: Platform-Specific Configuration
Each provider requires specific configurations in AndroidManifest.xml, Info.plist, or web/index.html.
Phase 3: Implementation & State Management
Integrate the authentication flow with the app's state management (e.g., Riverpod 3.0 Notifiers).
- Initialize: Call the respective plugin
initor configuration methods. - Authenticate: Trigger the login flow and capture the
AccessTokenorIdToken. - Handle Persistence: Store credentials securely using
flutter_secure_storage. - Error Handling: Implement retry logic and display user-friendly error messages (e.g., ApiException 10 for Google).
📚 Documentation Library
Refer to these specialized resources for each identity provider:
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 51 lines · 117 tokens per session scan A 802004c6214b
implementing-flutter-social-auth is a skill published in the GitHub repository Poorgramer-Zack/dart-expert-skills (7 stars, last pushed 1mo ago), licensed MIT. It adds 117 tokens to every session and 690 once invoked, about $0.0006 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 2026-08-31.
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