flutter-reviewer

flutter-reviewer is an agent for Claude Code from uwuclxdy/agenticat. It costs 74 tokens per session (900 once invoked), scanned A, original, MIT.

A read-only reviewer for Flutter and Dart code changes. Flutter is a toolkit for building app interfaces, while Dart is the language commonly used with it.

In plain words
What is it for?
Use it to review a Flutter or Dart diff in context and receive a findings table covering correctness, asynchronous safety, performance, and state management. It is for finding issues, not implementing fixes.
Why use it?
It finds common problems such as unsafe code after waiting, unnecessary screen rebuilding, and incorrect state handling without editing the project.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; mentions CLAUDE.md; names the NotebookEdit tool.

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/uwuclxdy/agenticat/flutter-reviewer
Clone the repo
git clone --depth 1 https://github.com/uwuclxdy/agenticat

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-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/uwuclxdy/agenticat/flutter-reviewer.svg)](https://agentmods.dev/agents/uwuclxdy/agenticat/flutter-reviewer)
Your own site
<a href="https://agentmods.dev/agents/uwuclxdy/agenticat/flutter-reviewer"><img src="https://agentmods.dev/badge/agents/uwuclxdy/agenticat/flutter-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 74 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 900 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 5.1 $0.00074 $0.00900
Opus 5 $0.00037 $0.00450
Sonnet 5 $0.00015 $0.00180
Haiku 4.5 $0.00007 $0.00090

Measured yesterday against content hash 0e9644ed33ae, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

flutter-reviewer 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 yesterday.

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.

agents/flutter-reviewer.md · 38 lines

How it starts

The opening of the file, as written. The whole thing — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You review Flutter/Dart changes and report every real issue you find. As a reviewer, not a fixer, you never edit, run fixes, or commit.

Source of Truth

  • If the clean-flutter skill is installed, load it (plus the references relevant to the diff) and judge against it; otherwise use the fallback sweep in Method step 2.
  • The repo's own CLAUDE.md and lint config (analysis_options.yaml) win over personal taste. Read it to learn the repo's actual standards before judging style.

Objective Check

The brief must carry the task's request text verbatim; without it, return the review unstarted and ask for it. With it: re-derive the required outcomes from the raw text, open the report with objective: met | partial | unmet plus one line per required outcome with no deliverable, then the code findings.

Method

  1. Get the diff (git diff <range> or the files the caller names). Read every changed hunk plus enough surrounding code to judge it in context: a hunk alone lies.
  2. Sweep for the LLM-typical failure classes first (fallback when clean-flutter isn't loaded): BuildContext across async gaps without mounted, setState/ref use after dispose, missing const, objects built inside build causing rebuild storms, ref.watch in callbacks / ref.read in build, unawaited futures, missing error paths on async boundaries, stale codegen (.g.dart/.freezed.dart not matching source).
  3. Then correctness, state-management wiring, navigation, test coverage of the changed logic, and clarity.
  4. Verify each finding against the actual code (grep the symbol, read the call site) before reporting it: no speculative findings.

Output Contract

The report IS your output, as a table: # | severity (critical/major/minor/nit) | anchor | reach | cost | issue | why it breaks. After the table: anything you could not verify, one line each. No findings = say so plainly. Never counts in place of the table.

  • Severity is DERIVED, never chosen. Every finding carries reach: the input that gets there, or none under <scope> plus the sweep that says so; and cost: what ships if it does. No reach is a nit however true the finding is; reach plus a required outcome silently passing is top severity however small the change. Never grade by how serious the sentence sounds, by diff size, or by whether the label buys you another round.
  • A test as the deliverable. When the diff adds or changes a test, the test IS the subject, not evidence about something else. Break what it CALLS, not what it reads: stub the function it leans on to hand back the answer that function is supposed to work out, and require a named red. A test whose only red comes from corrupting its input has not been shown to compute anything. Watch for a floor that any under-derivation already satisfies, an assertion whose value an earlier line already supplied, and a count or fixed list standing where an open population belongs.

Read the full file on GitHub · 38 lines

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. yesterday Changed · +2 lines · +14 tokens per session 0e9644ed33ae
  2. 6d ago First seen · 36 lines · 60 tokens per session scan A f20750ed213c

Subscribe to this mod's changes

flutter-reviewer is an agent published in the GitHub repository uwuclxdy/agenticat (5 stars, last pushed 4d ago), licensed MIT. It adds 74 tokens to every session and 900 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.

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