nestor-plugin

A decision-support add-on that asks a council of AI models for additional opinions and combines their judgments, including areas where they disagree.

In plain words
What is it for?
Use it for high-stakes choices, exploratory questions, adversarial review, and deliberation where contrasting views are useful.
Why use it?
It gives you structured second opinions for difficult decisions or open questions instead of relying on one model's answer.

Plugin for Claude Code

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 dkushnikov/nestor-plugin
agentmods
npx agentmods add plugins/dkushnikov/nestor-plugin/marketplace
Clone the repo
git clone --depth 1 https://github.com/dkushnikov/nestor-plugin

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

nestor-plugin 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.

.claude-plugin/marketplace.json · 19 lines

What it actually says

{
  "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
  "name": "nestor-plugin",
  "description": "Nestor — deliberation counsellor that convenes a council of frontier AI models for high-stakes decisions, exploratory questions, or third opinions.",
  "owner": {
    "name": "Dmitry Kushnikov",
    "email": "[email protected]"
  },
  "plugins": [
    {
      "name": "nestor",
      "description": "Convene a council of frontier models for third-opinion consultation. Routes questions to adversarial or deliberative mode based on shape; returns synthesised judgment with explicit disagreement reporting.",
      "source": "./plugins/nestor",
      "category": "decision-support",
      "homepage": "https://github.com/dkushnikov/nestor-plugin"
    }
  ]
}
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. yesterday First seen · 19 lines scan A c038aa3929e7

Subscribe to this mod's changes

nestor-plugin is a plugin published in the GitHub repository dkushnikov/nestor-plugin (2 stars, last pushed 10d 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.