flutter-ai-harness: Skill for Claude Code

.agents/skills/flutter-concurrency/SKILL.md

flutter-concurrency is a skill for Claude Code, Codex from bladeofgod/flutter-ai-harness. It costs 75 tokens per session (156 once invoked), scanned A, original, MIT.

A Flutter development guide for moving CPU-heavy work, such as large-data parsing or aggregation, into background Isolate workers. An Isolate is a separate Dart execution context that can keep the app's interface responsive.

In plain words
What is it for?
Use it when working with Isolate.run, Isolate.spawn, compute, SendPort, or ReceivePort, or when CPU-bound work causes visible lag in a Flutter app.
Why use it?
It helps prevent dropped frames when demanding calculations run on the same execution path as the interface. It is not intended for ordinary asynchronous requests, streams, or other input/output work.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions Codex.

This is bladeofgod/flutter-ai-harness's own configuration. It tells Claude Code and Codex how to work on flutter-ai-harness itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything flutter-ai-harness configures →

Reuse

Borrowing it

Nothing to install: this file belongs to bladeofgod/flutter-ai-harness. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/bladeofgod/flutter-ai-harness/main/.agents/skills/flutter-concurrency/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/bladeofgod/flutter-ai-harness

Made for: Claude Code, Codex.

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-concurrency

README.md
[![agentmods](https://agentmods.dev/badge/skills/bladeofgod/flutter-ai-harness/flutter-concurrency.svg)](https://agentmods.dev/skills/bladeofgod/flutter-ai-harness/flutter-concurrency)
Your own site
<a href="https://agentmods.dev/skills/bladeofgod/flutter-ai-harness/flutter-concurrency"><img src="https://agentmods.dev/badge/skills/bladeofgod/flutter-ai-harness/flutter-concurrency.svg" alt="Measured on agentmods" height="20"></a>
Per session 75 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 156 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 10
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 $0.00075 $0.00156
Opus 5 $0.00037 $0.00078
Sonnet 5 $0.00015 $0.00031
Haiku 4.5 $0.00007 $0.00016

Measured 8d ago against content hash ce0cbcd9590a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

flutter-concurrency 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 8d 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.

.agents/skills/flutter-concurrency/SKILL.md · 13 lines

What it actually says

flutter-concurrency

这是 Claude Skill 的 Codex 原生发现入口。执行前必须完整读取并遵守 Skill 事实源

不要在本文件复制或修改工作流正文。

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. 8d ago First seen · 13 lines · 75 tokens per session scan A ce0cbcd9590a

Subscribe to this mod's changes

flutter-concurrency is a skill published in the GitHub repository bladeofgod/flutter-ai-harness (112 stars, last pushed yesterday), licensed MIT. It adds 75 tokens to every session and 156 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 2026-08-30.

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