What is subagent-mcp?

A plugin that connects Claude Code or Codex CLI to locally run sub-agents through an MCP server and orchestration hook. Sub-agents are separate agent processes that can handle delegated work.

Use it for local sub-agent orchestration through Claude Code or Codex CLI. The input does not provide enough detail to state which concrete development tasks it supports.

It provides a way to coordinate additional local coding agents from the main agent, although the input does not describe their exact commands or limits.

subagent-mcp — Plugin by Heretyc

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 Heretyc/subagent-mcp

agentmods

npx agentmods add plugins/heretyc/subagent-mcp/marketplace

Clone the repo

git clone --depth 1 https://github.com/Heretyc/subagent-mcp

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

subagent-mcp 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.

.claude-plugin/marketplace.json · 16 lines

What it actually says

{
  "name": "subagent-mcp",
  "owner": {
    "name": "Lexi Blackburn"
  },
  "description": "Local Claude Code / Codex CLI sub-agent orchestration: MCP server + orchestration-mode hook.",
  "plugins": [
    {
      "name": "subagent-mcp",
      "version": "3.2.3",
      "source": "./",
      "description": "MCP server for local Claude Code / Codex CLI sub-agents, plus orchestration-mode directive and tool-gate hooks."
    }
  ]
}

Files

What ships with it

1 file beside marketplace.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.

plugin.json 632 B

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.

2d ago First seen · 16 lines scan A 226d749c04af

Subscribe to this mod's changes

subagent-mcp is a plugin published in the GitHub repository Heretyc/subagent-mcp (3 stars, last pushed 4d ago), licensed Apache-2.0. 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.

Building agents agentic ai ai-agents claude-code-plugin claude-plugin codex-app

subagent-mcp

Getting it into your agent

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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