proteus-argus

proteus-argus is an agent for Claude Code, OpenCode from Vyntra-Research/Proteus. It costs 25 tokens per session (217 once invoked), scanned A, original, GPL-3.0.

A security review tool for a limited part of a software system, such as one module, component, or basic building block.

In plain words
What is it for?
Use it to examine a bounded piece of code for vulnerabilities and other security weaknesses.
Why use it?
It helps inspect a defined area closely for security problems without reviewing the entire system at once.

Agent for Claude CodeOpenCode

Written for OpenCode and Claude Code: installed under .opencode/, but also a Claude Code subagent (agents/*.md).

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.

agentmods
npx agentmods add agents/vyntra-research/proteus/proteus-argus
Clone the repo
git clone --depth 1 https://github.com/Vyntra-Research/Proteus

Made for: Claude Code, OpenCode.

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.

agentmods badge for proteus-argus

README.md
[![agentmods](https://agentmods.dev/badge/agents/vyntra-research/proteus/proteus-argus.svg)](https://agentmods.dev/agents/vyntra-research/proteus/proteus-argus)
Your own site
<a href="https://agentmods.dev/agents/vyntra-research/proteus/proteus-argus"><img src="https://agentmods.dev/badge/agents/vyntra-research/proteus/proteus-argus.svg" alt="Measured on agentmods" height="20"></a>
Per session 25 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 217 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00025 $0.00217
Opus 5 $0.00013 $0.00109
Sonnet 5 $0.00005 $0.00043
Haiku 4.5 $0.00003 $0.00022

Measured 6d ago against content hash c0e1e1ba2dab, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

proteus-argus 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 6d 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.

.opencode/agents/proteus-argus.md · 43 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

  1. 6d ago First seen · 43 lines · 25 tokens per session scan A c0e1e1ba2dab

Subscribe to this mod's changes

proteus-argus is an agent published in the GitHub repository Vyntra-Research/Proteus (29 stars, last pushed 5d ago), licensed GPL-3.0. It adds 25 tokens to every session and 217 once invoked, about $0.0001 per session on Opus 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.