Borrowing it
Nothing to install: this file belongs to VeryGoodOpenSource/vgv-ai-flutter-plugin. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/VeryGoodOpenSource/vgv-ai-flutter-plugin/main/CLAUDE.mdgit clone --depth 1 https://github.com/VeryGoodOpenSource/vgv-ai-flutter-pluginWrote 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/instructions/verygoodopensource/vgv-ai-flutter-plugin/claude-md)<a href="https://agentmods.dev/instructions/verygoodopensource/vgv-ai-flutter-plugin/claude-md"><img src="https://agentmods.dev/badge/instructions/verygoodopensource/vgv-ai-flutter-plugin/claude-md/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/instructions/verygoodopensource/vgv-ai-flutter-plugin/claude-md"><img src="https://agentmods.dev/badge/instructions/verygoodopensource/vgv-ai-flutter-plugin/claude-md.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 | $0.01094 | $0.01094 |
| Opus 5.5 | $0.00438 | $0.00438 |
| Sonnet 5.5 | $0.00219 | $0.00219 |
| Haiku 4.5 | $0.00109 | $0.00109 |
Grade A, and why
vgv-ai-flutter-plugin CLAUDE.md 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 7d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- vgv-ai-flutter-plugin AGENTS.md — 89% identical, 274 lines differ
How it starts
The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.
@AGENTS.md
Hooks
The hooks/ directory contains SessionStart, PreToolUse, and PostToolUse hooks defined in hooks.json.
SessionStart Hooks
These run when a session begins:
warn-missing-mcp.sh— checks if Very Good CLI is installed and >= 1.5.0; outputs a warning to Claude's context if missing, outdated, or silent about its version (non-blocking). It names which of the two causes it is:dartis not on thePATHhooks inherit, or a Dart SDK upgrade left a stale snapshot thatvery_good --versionrebuilds
PreToolUse Hooks
These run before a tool call is executed:
mcp__.*very-good-cli__.*matcher →check-vgv-cli.sh— readstool_namefrom the payload and exits 0 unless the caller is a Very Good CLI tool, so a host that does not apply the matcher cannot have the decision land on an unrelated tool; for its own tools it auto-approves the call by returning a PreToolUseallowdecision, so it is always permitted regardless of run mode (interactive, headless, orskipAutoPermissionPrompt) and never dead-ends when the tool isn't onpermissions.allow; denies with an install/upgrade message if the CLI is missing or < 1.5.0, and stands aside when the CLI is present but its version cannot be read, for either reason, leaving normal permission handling to apply. The.*in the matcher covers both the baremcp__very-good-cli__*server (repo-root.mcp.json) and the plugin-namespacedmcp__plugin_<plugin>_very-good-cli__*form used when installed from a marketplaceBashmatcher →block-cli-workarounds.sh— deniesflutter/darttest/createandvery_good test/create/packagesin the shell and points to the MCP tool. Quoted text is data unlesseval,sh -cor$( )runs it. A heredoc body with a quoted delimiter (<<'EOF') is data too, unless the opening line feeds it to a shell (bash <<'EOF',cat <<'EOF' | sh), which runs it; an unquoted<<EOFexpands, so its body is always scanned. Every adjacent word pair is checked, so wrappers (fvm,melos,sudo,timeout) and/path/to/flutterneed no list. The denial names the match and says the whole call was refused. Pinned gaps:"flutter" testand$F testpass; an unquoted pair is denied wherever it sits, including as an argument (echo flutter test,man flutter test); narrowing the match to a command position would need the wrapper list the pair rule exists to avoid
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.
- 7d ago Changed · +158 tokens per session afc77de2ea85
- 14d ago Changed 2ba49b224cac
- 22d ago Changed · +30 tokens per session 561b581272df
- 26d ago Changed · +1 lines · +30 tokens per session 240897e95a22
- 1mo ago Changed · +11 lines · +300 tokens per session 2fb58bd75072
- 1mo ago Changed · -191 lines · -2,229 tokens per session cab7ec9e37eb
- 1mo ago First seen · 229 lines · 2,805 tokens per session scan A 9bbc44939619
vgv-ai-flutter-plugin CLAUDE.md is an instructions file published in the GitHub repository VeryGoodOpenSource/vgv-ai-flutter-plugin (175 stars, last pushed 8d ago), licensed MIT. It adds 1,094 tokens to every session, about $0.0044 per session on Opus 5.5. 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.