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Find Verified Security Flaws with OpenAnt

Identify vulnerabilities with OpenAnt, a tool for founders to proactively secure their systems.

From the repo · “OpenAnt from Knostic is the leading open source LLM-based vulnerability discovery product, helping defenders proactively find verified security flaws while minimizing both false positives and false negatives. Stage 1 detects. Stage 2 attacks. What survives is real.”

781 stars+6★ this week121 forksPythonGuide quality 8/10 · reviewed Jul 7Updated 10/23/2026100% free · open source
What it does

OpenAnt identifies verified security vulnerabilities in systems using a leading open source LLM-based vulnerability discovery approach, minimizing false positives and negatives.

When to use it
  • •When you need to proactively secure your startup's systems from potential security threats
  • •When you want to detect and verify security flaws before they can be exploited
  • •When you're looking for an open source solution for vulnerability discovery
Ready-to-paste prompt
python detect.py --input example_input.json --output example_output.json --stage 1
Heads up: You need to have Python installed on your system to run OpenAnt, and the README advises using a specific Python version for compatibility, so ensure you have the correct version installed before proceeding.
Saves to your device
Use with Claude
New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install
Claude Code
mkdir -p ~/.claude/skills/openant && curl -fsSL https://workflowstacks.com/api/skills/openant/claude-skill -o ~/.claude/skills/openant/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How Find Verified Security Flaws with OpenAnt works
Codeflow
Free to inspect

Find Verified Security Flaws with OpenAnt is a very large Python project (~166k lines across 389 code files, plus 709 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, Apache-2.0 license, has a test suite.

Size
Very large codebase
~166k lines · 389 code files · days to read — use, don't read
Setup
Developer setup
A real software project. Use it via its install path; don't expect to read it all.
Runs on
Python
No API keys detected
Python 92%Go 7%
Where to start reading
  1. 1
    README.md
    Start here — what it does and how to install it
What's in each folder
apps/Sub-packages / plugins157 files
docs/Documentation2 files
libs/Folder1026 files
config/Configuration3 files
scripts/Helper scripts1 files
.github/CI / automation (GitHub Actions)3 files
assets/Images & static assets2 files
READMEHas testsDocumentedCI checksApache-2.0 licenseUpdated this month
Quick Actions
Details
Creator
knostic
Language
Python
Category
ai-agent
Published
2/26/2026

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Featured on WorkflowStacks
[![Featured on WorkflowStacks](https://workflowstacks.com/api/badge/openant.svg)](https://workflowstacks.com/skills/openant?utm_source=github&utm_medium=badge)
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