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.
/plugin marketplace add ag0os/rails-dev-pluginnpx agentmods add plugins/ag0os/rails-dev-plugin/rails-dev-plugingit clone --depth 1 https://github.com/ag0os/rails-dev-pluginGrade A, and why
rails-dev-plugin 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.
What it actually says
{
"name": "rails-dev-plugin",
"description": "Rails development plugin with specialized agents and portable Skills. Agents are lean orchestrators that load domain-specific Skills for models, controllers, views, services, jobs, testing, architecture, DevOps, GraphQL, Hotwire, API design, mailers, authentication, caching, Ruby refactoring, object-oriented design, and project convention detection. Adapts recommendations to the project's architecture axes (logic placement and delivery) and auto-detected project conventions. Skills are independently usable and exportable to other platforms.",
"version": "3.0.0",
"author": {
"name": "ag0os",
"url": "https://github.com/ag0os"
},
"homepage": "https://github.com/ag0os/rails-dev-plugin",
"repository": "https://github.com/ag0os/rails-dev-plugin.git",
"keywords": [
"rails",
"ruby",
"agents",
"development",
"testing",
"architecture",
"devops",
"refactoring",
"graphql",
"hotwire",
"stimulus",
"turbo",
"activerecord",
"api",
"rest",
"serialization",
"skills",
"object-design"
],
"license": "MIT"
}
What ships with it
1 file beside plugin.json 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.
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.
- yesterday First seen · 33 lines scan A 2835421a6056
rails-dev-plugin is a plugin published in the GitHub repository ag0os/rails-dev-plugin (5 stars, last pushed 3mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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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