mastermind-plugin-manager

mastermind-plugin-manager is a skill for Claude Code, Codex from monoes/monomind. It costs 42 tokens per session (2,437 once invoked), scanned A, original, Apache-2.0.

A bookkeeping tool for installing npm packages and recording plugin states in a registry file. Its records are not loaded by the organisation runtime, so enabling a plugin here does not activate it.

In plain words
What is it for?
Use it to list, install, uninstall, enable, disable, or check updates for recorded npm plugins.
Why use it?
It keeps an inventory of plugin packages and their states while making its runtime limitation clear. It does not manage whether plugins actually run.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to list, install, uninstall, enable, disable, or check updates for recorded npm plugins.

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Install with agentmods
npx agentmods add skills/monoes/monomind/mastermind-plugin-manager
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 monoes/monomind --skill mastermind-plugin-manager
Clone the repo
git clone --depth 1 https://github.com/monoes/monomind

Made for: Claude Code, Codex.

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 mastermind-plugin-manager

README.md
[![agentmods](https://agentmods.dev/badge/skills/monoes/monomind/mastermind-plugin-manager/github.svg)](https://agentmods.dev/skills/monoes/monomind/mastermind-plugin-manager)
Your own site
<a href="https://agentmods.dev/skills/monoes/monomind/mastermind-plugin-manager"><img src="https://agentmods.dev/badge/skills/monoes/monomind/mastermind-plugin-manager/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.

agentmods 80×15 button for mastermind-plugin-manager

Your own site · 80×15
<a href="https://agentmods.dev/skills/monoes/monomind/mastermind-plugin-manager"><img src="https://agentmods.dev/badge/skills/monoes/monomind/mastermind-plugin-manager.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,437 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.02437
Opus 5.5 $0.00017 $0.00975
Sonnet 5.5 $0.00008 $0.00487
Haiku 4.5 $0.00004 $0.00244

Measured 2d ago against content hash 1dc30ec2809c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mastermind-plugin-manager scanned grade A with 1 finding 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 2d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

latest=$(curl -sf "https://registry.npmjs.org/${pkg}/latest" 2>/dev/null | jq -r '.version // "?"' 2>/dev/null || echo "?")
.agents/skills/mastermind-plugin-manager/SKILL.md · 245 lines

How it starts

The opening of the file, as written. The whole thing — 245 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mastermind Plugin Manager

This skill is invoked directly via /mastermind-plugin-manager.

Bookkeeping only — not enforced by the Org Runtime. It writes .monomind/plugins/registry.json, which no runtime code reads: installing, enabling, or disabling a plugin here does not load or unload anything.


Inputs

  • brain_context: BRAIN CONTEXT block (injected by command, or loaded below if standalone)
  • action: list | install | uninstall | enable | disable | check-updates
  • package_name: npm package name to install (for install; e.g. @monomind/plugin-github)
  • plugin_id: plugin id slug (required for uninstall/enable/disable)
  • confirm: yes (required second step for uninstall — prevents accidental removal)
  • caller: command | master

Plugin Record Schema

{
  "id": "plugin-slug",
  "packageName": "@monomind/plugin-name",
  "status": "installed",
  "version": "1.2.0",
  "category": "monitoring",
  "description": "One-line plugin description",
  "installedAt": "2026-01-01T00:00:00Z",
  "config": {},
  "grants": [],
  "health": {"status": "ok", "lastCheck": null}
}

Step 0 — Brain Load (standalone only)

If caller is not "command", load brain context following mastermind-protocol/SKILL.md Brain Load Procedure with namespace: ops.


Step 1 — Load Plugin Registry

registryFile=".monomind/plugins/registry.json"
mkdir -p ".monomind/plugins"
[ ! -f "$registryFile" ] && echo '{"plugins":[]}' > "$registryFile"

Step 2 — Execute Action

list (default)

echo "INSTALLED PLUGINS"
echo "────────────────────────────────────────────────────────"
printf "%-24s %-10s %-10s %-14s %s\n" "ID" "STATUS" "VERSION" "CATEGORY" "PACKAGE"
echo "────────────────────────────────────────────────────────"

count=$(jq '.plugins | length' "$registryFile")
if [ "$count" -eq 0 ]; then
  echo "  No plugins installed."
  echo "  Install one: --action install --package-name @monomind/plugin-github"
else
  jq -r '(.plugins // [])[] |
    [.id, (.status // "installed"), (.version // "-"), (.category // "general"),
     (.packageName // "-")] | @tsv' \
    "$registryFile" | while IFS=$'\t' read -r id st ver cat pkg; do
    printf "%-24s %-10s %-10s %-14s %s\n" "$id" "$st" "$ver" "$cat" "$pkg"
  done

  errCount=$(jq '[(.plugins // [])[] | select(.status == "error")] | length' "$registryFile")
  [ "$errCount" -gt 0 ] && echo "" && echo "  WARNING: $errCount plugin(s) in error state. Run: --action list to inspect."
fi

echo ""
echo "  Install:    --action install --package-name <npm-package>"
echo "  Uninstall:  --action uninstall --plugin-id <id>"
echo "  Settings:   /mastermind-plugin-settings --plugin-id <id>"

Read the full file on GitHub · 245 lines

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. 2d ago First seen · 245 lines · 42 tokens per session scan A 1dc30ec2809c

Subscribe to this mod's changes

mastermind-plugin-manager is a skill published in the GitHub repository monoes/monomind (23 stars, last pushed 2d ago), licensed Apache-2.0. It adds 42 tokens to every session and 2,437 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-26.