An engineering-guidance add-on that encourages careful standards, awareness of how changes affect other parts of a project, and willingness to question weak decisions.

It helps review proposed implementations, consider a change's wider impact, and maintain consistent software engineering standards.

Coding agents can follow instructions too readily or make changes without considering wider consequences. This add-on is intended to push reviews toward more critical engineering judgment.

prodev — Plugin by catcatcatstudio

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.

Claude Code

/plugin marketplace add catcatcatstudio/cat-skills

agentmods

npx agentmods add plugins/catcatcatstudio/cat-skills/prodev

Clone the repo

git clone --depth 1 https://github.com/catcatcatstudio/cat-skills

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

prodev 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.

skills/prodev/.claude-plugin/plugin.json · 14 lines

What it actually says

{
  "name": "prodev",
  "description": "Engineering standard enforcement — senior engineer mentality, blast radius thinking, anti-sycophancy",
  "version": "1.0.0",
  "author": {
    "name": "catcatcat",
    "url": "https://catcatcat.ai"
  },
  "homepage": "https://github.com/catcatcatstudio/cat-skills",
  "repository": "https://github.com/catcatcatstudio/cat-skills",
  "license": "MIT",
  "keywords": ["prodev", "engineering", "quality", "standards", "skills"]
}

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.

yesterday First seen · 14 lines scan A 8e383b28d3d7

Subscribe to this mod's changes

prodev is a plugin published in the GitHub repository catcatcatstudio/cat-skills (3 stars, last pushed 5d 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.

Code review agent-skills ai-agent claude-code claude-code-plugin claude-code-skill claude-skills

prodev

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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