smcp-help

smcp-help is a skill for Claude Code, Codex from Heretyc/subagent-mcp. It costs 113 tokens per session (1,651 once invoked), scanned B, original, Apache-2.0.

A documentation and configuration guide for the subagent-mcp add-on in Claude Code and Codex. Subagent-mcp connects a command-line agent to background subagents and supports provider routing and multi-stage swarm workflows.

In plain words
What is it for?
Use it to understand installation, providers.jsonc and .env configuration, routing tables, background agents, sub-orchestrators, handoffs, and the seven-stage swarm workflow.
Why use it?
It explains the setup and configuration without needing an API or changing files for you. It also clarifies which commands manage agents, providers, routing, and orchestration.

Skill for Claude CodeCodex

Part of the subagent-mcp plugin — 8 skills, 1 agent, 3 hooks, 1 MCP server shipped together

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.

agentmods
npx agentmods add skills/heretyc/subagent-mcp/smcp-help
Any agent
npx skills add Heretyc/subagent-mcp --skill smcp-help
Clone the repo
git clone --depth 1 https://github.com/Heretyc/subagent-mcp

Made for: Claude Code, Codex.

Or install subagent-mcp, the plugin that ships this one along with the rest of its 8 skills, 1 agent, 3 hooks, 1 MCP server.

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 smcp-help

README.md
[![agentmods](https://agentmods.dev/badge/skills/heretyc/subagent-mcp/smcp-help.svg)](https://agentmods.dev/skills/heretyc/subagent-mcp/smcp-help)
Your own site
<a href="https://agentmods.dev/skills/heretyc/subagent-mcp/smcp-help"><img src="https://agentmods.dev/badge/skills/heretyc/subagent-mcp/smcp-help.svg" alt="Measured on agentmods" height="20"></a>
Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,651 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
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 $0.00113 $0.01651
Opus 5 $0.00056 $0.00826
Sonnet 5 $0.00023 $0.00330
Haiku 4.5 $0.00011 $0.00165

Measured 5d ago against content hash acfc5714960e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

smcp-help scanned grade B 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 5d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

`~/.codex/config.toml`:
skills/smcp-help/SKILL.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

subagent-mcp Help

Answer questions about installing, configuring, and maintaining the subagent-mcp addon. This skill is documentation only: it explains commands and config shape. It never edits configs or runs installs on its own. It works identically in Claude Code and Codex and needs no network or API access.

What subagent-mcp is

subagent-mcp is an MCP stdio server plus per-turn orchestration-mode hooks that let a host CLI (Claude Code or Codex) launch and manage background subagents. The server exposes tools such as launch_agent, poll_agent, wait, get_status, orchestration-mode, swarm, and the handoff-* set. Providers and their routing preferences live in a user-owned providers.jsonc; secrets live only in a sibling .env.

The swarm tool coaches a 7-stage agentic workflow for objectives projected to span multiple sessions. Call swarm() to start; the server tracks the current stage in memory and returns per-stage coaching with the exact next call. Stage 6 dispatches sub-orchestrators -- use launch_agent with sub-orchestrator: true (main orchestrator only) to launch a child as a delegate-only orchestrator; its own sub-agents run as normal workers.

Scope note for this release: as of v3.0.0, provider routing slots are live routing config. They record per-category priority order, are validated and reported (see doctor and get_status), and are consumed by the slot router to route matching task categories to the configured API provider.

Install

Marketplace plugin (Claude Code)

Bundles the MCP server and the per-turn hook in one plugin.

claude plugin marketplace add Heretyc/subagent-mcp
claude plugin install subagent-mcp@subagent-mcp

install takes <plugin-name>@<marketplace-name>; both are subagent-mcp. Add --scope user (default, all projects) or --scope project. Restart the session after installing.

Codex equivalent

Codex has a plugin marketplace too. Install the bundled plugin with:

codex plugin marketplace add Heretyc/subagent-mcp
codex plugin add subagent-mcp@subagent-mcp

Read the full file on GitHub · 167 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. 5d ago First seen · 167 lines · 113 tokens per session scan B acfc5714960e

Subscribe to this mod's changes

smcp-help is a skill published in the GitHub repository Heretyc/subagent-mcp (3 stars, last pushed today), licensed Apache-2.0. It adds 113 tokens to every session and 1,651 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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