agentmods.dev

flutter-network

A Flutter networking guide for building REST API connections with Dio, Retrofit and JSON data classes. REST APIs are web services that exchange requests and responses over HTTP.

In plain words
What is it for?
Use it to define API endpoints, serialize responses, add authentication, logging and retry interceptors, and map timeouts or server errors to known app failures.
Why use it?
It keeps HTTP setup, authentication, retries and error conversion in defined places, so the rest of the app does not depend directly on networking libraries.

Skill for Claude CodeCodex

5 2mo ago A scan 80 tokens original MIT
View the source file yendangn/flutter-app-builder
Install

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.

agentmods
npx agentmods add skills/yendangn/flutter-app-builder/flutter-network
Any agent
npx skills add yendangn/flutter-app-builder --skill flutter-network
Clone the repo
git clone --depth 1 https://github.com/yendangn/flutter-app-builder

Made for: Claude Code, Codex.

Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 606 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00080 $0.00606
Opus 5 $0.00040 $0.00303
Sonnet 5 $0.00016 $0.00121
Haiku 4.5 $0.00008 $0.00061

Measured 2d ago against content hash eb988dc8bfbe, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

flutter-network 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 2d 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.

skills/flutter-network/SKILL.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Flutter Network

Full reference: template.md

Key rules

  • DioClient is the only file that imports package:dio/dio.dart and configures the Dio instance.
  • ApiClient is generated by Retrofit (@RestApi()). It is the only file that defines endpoint methods.
  • All interceptors are injected into buildDio via DI — no inline construction:
    1. SecurityInterceptor — SSL pinning, flavor-configurable via AppConfig.
    2. RetryInterceptorFactory — wraps dio_smart_retry; creates RetryInterceptor bound to the Dio instance.
    3. LoggingInterceptor — active in dev/uat only (AppConfig.enableLogging).
    4. ErrorInterceptor — maps DioException to Failure hierarchy.
    5. AuthInterceptor — added separately in DI to avoid circular dependency.
  • Failure is a sealed class — NetworkFailure, TimeoutFailure, UnauthorizedFailure, NotFoundFailure, ServerFailure, CacheFailure, UnknownFailure. Never throw raw exceptions across layer boundaries — always throw FailureException(SomeFailure()).
  • DTOs (*_dto.dart) live in data/dtos/. Always annotated with @JsonSerializable(). Always expose a toEntity() method. Never import domain entities from data/.
  • json_annotation + json_serializable + retrofit_generator require build_runner.
  • Run dart run build_runner build --delete-conflicting-outputs after any annotation change.

Files

lib/src/core/network/
  dio_client.dart         ← Dio setup, all interceptors injected via DI
  api_client.dart         ← @RestApi() Retrofit interface
  api_client.g.dart       ← generated
  interceptors/
    security_interceptor.dart       ← SSL pinning (flavor-configurable)
    retry_interceptor_factory.dart  ← wraps dio_smart_retry
    auth_interceptor.dart
    logging_interceptor.dart
    error_interceptor.dart
lib/src/core/error/
  failure.dart            ← sealed Failure hierarchy + FailureException

Co-load with

  • flutter-di — DioClient + ApiClient registration
  • flutter-base-classes — BaseRepository.safeCall, BaseDto
  • flutter-auth — token refresh in auth interceptor

Read the full file on GitHub · 47 lines

Files

What ships with it

6 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.

Changes

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.

  1. 2d ago First seen · 47 lines · 80 tokens per session scan A eb988dc8bfbe

Subscribe to this mod's changes

flutter-network is a skill published in the GitHub repository yendangn/flutter-app-builder (5 stars, last pushed 2mo ago), licensed MIT. It adds 80 tokens to every session and 606 once invoked, about $0.0004 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.

Backend and APIsMobile
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