What is opengrep-rule-generator-research?

A tool for creating Opengrep or Semgrep rules, which are pattern-based checks that search source code for specific problems. It can work from a vulnerability description, CVE, CWE, or OWASP category, or guide you through defining one.

Use it to write search or data-flow rules, detect vulnerability patterns, and create test files for the rules.

It turns a security concern into a reusable check that can be run across a codebase. This avoids repeatedly looking for the same unsafe coding pattern by hand.

opengrep-rule-generator-research — Skill by Security-Phoenix-demo

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.

Any agent

npx skills add Security-Phoenix-demo/security-skills-claude-code --skill opengrep-rule-generator-research

Clone the repo

git clone --depth 1 https://github.com/Security-Phoenix-demo/security-skills-claude-code

Made for: Claude Code.

Or install phoenix-sast-rules, the plugin that ships this one along with the rest of its 2 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/security-phoenix-demo/security-skills-claude-code/opengrep-rule-generator-research/github.svg)](https://agentmods.dev/skills/security-phoenix-demo/security-skills-claude-code/opengrep-rule-generator-research)

Your own site

<a href="https://agentmods.dev/skills/security-phoenix-demo/security-skills-claude-code/opengrep-rule-generator-research"><img src="https://agentmods.dev/badge/skills/security-phoenix-demo/security-skills-claude-code/opengrep-rule-generator-research/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/security-phoenix-demo/security-skills-claude-code/opengrep-rule-generator-research"><img src="https://agentmods.dev/badge/skills/security-phoenix-demo/security-skills-claude-code/opengrep-rule-generator-research.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,343 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00059	$0.04343
Opus 5.5	$0.00024	$0.01737
Sonnet 5.5	$0.00012	$0.00869
Haiku 4.5	$0.00006	$0.00434

Measured 2mo ago against content hash 4ccef7d2aecf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

opengrep-rule-generator-research 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 2mo 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

opengrep-rule-generator — 91% identical, 4 lines differ

plugins/phoenix-sast-rules/skills/opengrep-rule-generator-research/SKILL.md · 478 lines

How it starts

The opening of the file, as written. The whole thing — 478 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Opengrep Rule Generator

Overview

Generate valid opengrep/semgrep YAML rules through collaborative dialogue. Supports two workflows: guided (interactive Q&A to discover what to detect) and vulnerability-driven (given CVEs, OWASP categories, or vulnerability descriptions, generate rules automatically).

When to Use

User says "create a rule", "write a rule", "generate a rule", "detect [vulnerability]"
User provides a CVE, CWE, or OWASP reference and wants detection rules
User shares code snippets and asks "how do I catch this pattern?"
User wants to scan a codebase for a class of vulnerabilities
User asks to audit code for security issues and wants reusable rules

Process Flow

digraph rule_gen {
    "User request" [shape=doublecircle];
    "Has specific vulnerability?" [shape=diamond];
    "Guided Discovery" [shape=box];
    "Vulnerability-Driven" [shape=box];
    "Gather context" [shape=box];
    "Choose rule mode" [shape=diamond];
    "Generate Search rule" [shape=box];
    "Generate Taint rule" [shape=box];
    "Present rule for review" [shape=box];
    "User approves?" [shape=diamond];
    "Write rule file" [shape=box];
    "Generate test file" [shape=box];
    "Validate with opengrep" [shape=doublecircle];

    "User request" -> "Has specific vulnerability?";
    "Has specific vulnerability?" -> "Vulnerability-Driven" [label="yes"];
    "Has specific vulnerability?" -> "Guided Discovery" [label="no"];
    "Guided Discovery" -> "Gather context";
    "Vulnerability-Driven" -> "Gather context";
    "Gather context" -> "Choose rule mode";
    "Choose rule mode" -> "Generate Search rule" [label="pattern match"];
    "Choose rule mode" -> "Generate Taint rule" [label="data flow"];
    "Generate Search rule" -> "Present rule for review";
    "Generate Taint rule" -> "Present rule for review";
    "Present rule for review" -> "User approves?";
    "User approves?" -> "Present rule for review" [label="revise"];
    "User approves?" -> "Write rule file" [label="yes"];
    "Write rule file" -> "Generate test file";
    "Generate test file" -> "Validate with opengrep";
}

Read the full file on GitHub · 478 lines

Files

What ships with it

3 files beside SKILL.md 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.

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.

2mo ago First seen · 478 lines · 59 tokens per session scan A 4ccef7d2aecf

Subscribe to this mod's changes

opengrep-rule-generator-research is a skill published in the GitHub repository Security-Phoenix-demo/security-skills-claude-code (81 stars, last pushed 5d ago), licensed MIT. It adds 59 tokens to every session and 4,343 once invoked, about $0.0002 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.