A tool server for coordinating software agents and checking what actually changed in a Git repository. It can verify Git history, manage collisions when agents would edit the same files, and return structured refusals.

It helps verify repository ancestry, arbitrate file-tree conflicts, and expose these checks as tools through the Model Context Protocol, a standard way for programs to offer tools to agents.

It reduces reliance on an agent's own claim that work was shipped and helps prevent competing agents from changing the same files at once. Refusal reasons use a fixed set of categories.

dos-kernel — Plugin for Gemini CLI by anthony-chaudhary

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.

Clone the repo

git clone --depth 1 https://github.com/anthony-chaudhary/dos-kernel

Made for: Gemini CLI.

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/plugins/anthony-chaudhary/dos-kernel/gemini-extension/github.svg)](https://agentmods.dev/plugins/anthony-chaudhary/dos-kernel/gemini-extension)

Your own site

<a href="https://agentmods.dev/plugins/anthony-chaudhary/dos-kernel/gemini-extension"><img src="https://agentmods.dev/badge/plugins/anthony-chaudhary/dos-kernel/gemini-extension/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/plugins/anthony-chaudhary/dos-kernel/gemini-extension"><img src="https://agentmods.dev/badge/plugins/anthony-chaudhary/dos-kernel/gemini-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

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. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

dos-kernel 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 1mo ago.

The scan reads gemini-extension.json. This mod also ships 42 executable files (examples/braintrust_scorer/dos_braintrust_scorer.py, examples/conformance_plugins/judge_plugin/example_judge.py, examples/conformance_plugins/judge_plugin/tests/test_conformance.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

gemini-extension.json · 17 lines

What it actually says

{
  "name": "dos-kernel",
  "version": "0.30.0",
  "description": "The kernel that doesn't believe the agents. Exposes the DOS trust syscalls as MCP tools — verify what actually shipped (git ancestry, not self-report), arbitrate file-tree collisions before two agents edit the same files, and refuse with a structured reason from a closed vocabulary. Requires the dos-kernel Python package: pip install 'dos-kernel[mcp]'.",
  "contextFileName": "GEMINI.md",
  "mcpServers": {
    "dos": {
      "command": "python",
      "args": ["-m", "dos_mcp.server"],
      "cwd": "${extensionPath}",
      "env": {
        "PYTHONIOENCODING": "utf-8"
      }
    }
  }
}

Files

What ships with it

60 files beside gemini-extension.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.

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.

1mo ago First seen · 17 lines scan A 9f0a34f8bdf5

Subscribe to this mod's changes

dos-kernel is a plugin published in the GitHub repository anthony-chaudhary/dos-kernel (20 stars, last pushed today), 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 2026-09-07.

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dos-kernel

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What ships with it

What this file has done since we first saw it

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