mastermind-plugins

mastermind-plugins is a skill for Claude Code, Codex from monoes/monomind. It costs 36 tokens per session (1,524 once invoked), scanned A, original, Apache-2.0.

A plugin management tool for an organisation, including plugins installed from npm packages or local paths. Plugins are add-ons that can provide workers, events, or custom tools.

In plain words
What is it for?
It helps list, install, uninstall, enable, disable, inspect, and view examples for organisation plugins.
Why use it?
It gives an organisation one workflow for seeing which plugins exist and changing their installed or enabled state.

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 It helps list, install, uninstall, enable, disable, inspect, and view examples for organisation plugins.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/monoes/monomind/mastermind-plugins
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-plugins
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-plugins

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/monoes/monomind/mastermind-plugins"><img src="https://agentmods.dev/badge/skills/monoes/monomind/mastermind-plugins.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,524 The whole file, excluding the scripts and references it only reads on demand.
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.
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 $0.00036 $0.01524
Opus 5.5 $0.00014 $0.00610
Sonnet 5.5 $0.00007 $0.00305
Haiku 4.5 $0.00004 $0.00152

Measured 2d ago against content hash 20f63f9802d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mastermind-plugins 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 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.

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.

.agents/skills/mastermind-plugins/SKILL.md · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mastermind Plugins

This skill is invoked directly via /mastermind-plugins.


Inputs

  • brain_context: BRAIN CONTEXT block (injected by command, or loaded below if standalone)
  • org_name: org to manage plugins for (optional — uses global plugin registry if omitted)
  • action: list | install | uninstall | enable | disable | status | examples
  • plugin_id: plugin id or package name (required for uninstall/enable/disable/status)
  • package_name: npm package or local path (required for install)
  • caller: command | master

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

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

# If org scoped, also check org-level plugin overrides
if [ -n "$org_name" ]; then
  orgPluginsFile=".monomind/orgs/${org_name}-plugins.json"
  [ ! -f "$orgPluginsFile" ] && echo '{"plugins":[]}' > "$orgPluginsFile"
fi

Step 2 — Execute Action

list (default)

echo "PLUGINS"
echo "──────────────────────────────────────────────────────────"
printf "%-28s %-12s %-10s %-10s %s\n" "ID / PACKAGE" "VERSION" "STATUS" "CATEGORY" "ERROR"
echo "──────────────────────────────────────────────────────────"

count=$(jq '.plugins | length' "$registryFile")
if [ "$count" -eq 0 ]; then
  echo "  No plugins installed. Use --action install --package-name <pkg> to add one."
else
  jq -r '(.plugins // [])[] |
    [
      (.id // .packageName // "unknown"),
      (.version // "-"),
      (.status // "unknown"),
      (.category // "general"),
      (if .lastError then (.lastError | split("\n")[0] | .[0:40]) else "-" end)
    ] | @tsv' "$registryFile" | while IFS=$'\t' read -r id ver status cat err; do
    statusColor=""
    printf "%-28s %-12s %-10s %-10s %s\n" "$id" "$ver" "$status" "$cat" "$err"
  done
fi

echo ""
echo "Total: $count plugin(s)"
[ -n "$org_name" ] && echo "Org overrides: $(jq '.plugins | length' "$orgPluginsFile" 2>/dev/null || echo 0)"

Read the full file on GitHub · 181 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 · 181 lines · 36 tokens per session scan A 20f63f9802d8

Subscribe to this mod's changes

mastermind-plugins is a skill published in the GitHub repository monoes/monomind (23 stars, last pushed 2d ago), licensed Apache-2.0. It adds 36 tokens to every session and 1,524 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-26.

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