flutter-code-writer

flutter-code-writer is an agent for Claude Code from Dynokostya/just-works. It costs 30 tokens per session (311 once invoked), scanned A, original, Apache-2.0.

A coding agent for Flutter and Dart files. Flutter is a toolkit for building apps, and Dart is the programming language it uses; the agent follows the project's rules and runs relevant checks.

In plain words
What is it for?
Use it to create or edit Flutter widgets and Dart code, then run Dart analysis, formatting, and tests for changed widgets.
Why use it?
It keeps edits aligned with the project's SDK, dependencies, state-management approach, formatting, and analysis settings.

Agent for Claude Code

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 agents/dynokostya/just-works/flutter-code-writer
Clone the repo
git clone --depth 1 https://github.com/Dynokostya/just-works

Made for: Claude Code.

Wrote 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.

agentmods badge for flutter-code-writer

README.md
[![agentmods](https://agentmods.dev/badge/agents/dynokostya/just-works/flutter-code-writer.svg)](https://agentmods.dev/agents/dynokostya/just-works/flutter-code-writer)
Your own site
<a href="https://agentmods.dev/agents/dynokostya/just-works/flutter-code-writer"><img src="https://agentmods.dev/badge/agents/dynokostya/just-works/flutter-code-writer.svg" alt="Measured on agentmods" height="20"></a>
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 311 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 $0.00030 $0.00311
Opus 5 $0.00015 $0.00156
Sonnet 5 $0.00006 $0.00062
Haiku 4.5 $0.00003 $0.00031

Measured today against content hash 1e4f0810d6f3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

flutter-code-writer 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.

.claude/agents/flutter-code-writer.md · 35 lines

What it actually says

Write clean, type-safe Flutter widgets and Dart code following project standards.

Before Writing

Read the files you will change before making edits. For single-file edits, reading the target file is sufficient. For cross-cutting changes, read the directly affected modules.

Check pubspec.yaml for Flutter and Dart SDK constraints and dependencies, analysis_options.yaml for lint rules, and the project's state-management package (Provider, Riverpod, Bloc) or service locator (GetIt) before writing.

Scope

Implement exactly what was requested. Keep solutions simple and focused.

  • Add only the code changes that were asked for.
  • Use existing patterns and abstractions rather than introducing new ones.
  • Skip docstrings, comments, and type annotations on code you did not change.
  • Skip error handling or validation for scenarios that cannot occur.
  • Skip helpers or abstractions for one-time operations.

If the request is ambiguous about scope, implement the narrower interpretation.

Quality

Write code that passes dart analyze and dart format. After editing, run dart analyze on the affected files and flutter test for changed widgets unless a project hook already does it.

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. today First seen · 35 lines · 30 tokens per session scan A 1e4f0810d6f3

Subscribe to this mod's changes

flutter-code-writer is an agent published in the GitHub repository Dynokostya/just-works (14 stars, last pushed today), licensed Apache-2.0. It adds 30 tokens to every session and 311 once invoked, about $0.0002 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 2026-09-04.

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