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.
npx skills add Heretyc/subagent-mcp --skill subagent-mcp-installergit clone --depth 1 https://github.com/Heretyc/subagent-mcpWrote 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.
[](https://agentmods.dev/skills/heretyc/subagent-mcp/subagent-mcp-installer)<a href="https://agentmods.dev/skills/heretyc/subagent-mcp/subagent-mcp-installer"><img src="https://agentmods.dev/badge/skills/heretyc/subagent-mcp/subagent-mcp-installer.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.01924 |
| Opus 5 | $0.00000 | $0.00962 |
| Sonnet 5 | $0.00000 | $0.00385 |
| Haiku 4.5 | $0.00000 | $0.00192 |
Grade B, and why
subagent-mcp-installer scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
| Codex CLI | yes (`~/.codex/config.toml`) | yes (`SessionStart` + `UserPromptSubmit`) | `references/codex-cli.md` | How it starts
The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
subagent-mcp Installer
Deploy the subagent-mcp addon : the MCP stdio server plus the per-turn
orchestration-mode hooks and their directive assets : to a permanent,
repo-decoupled location, then register it with each supported vendor using
that vendor's official, standards-compliant mechanism.
Input = the host machine + which vendors are present (Claude Code CLI, Codex CLI). Output = a working, verified install that does NOT reference the dev repo, a worktree, or any temp path.
This skill is the authoritative install SOP. It supersedes the absolute-path-to-
repo examples in docs/install/* (those point at the build tree; this ships a
decoupled copy). When they disagree, this skill wins.
Non-negotiable rules
- Permanent location only. Install to the global npm package dir
(
npm root -g→<root>/@heretyc/subagent-mcp) or another stable, user-owned dir. NEVER install from or point config at: a git worktree,%TEMP%,/tmp,/TMP,$TMPDIR,os.tmpdir(), aDownloadsfolder, or the live dev checkout. Seereferences/locations.mdfor the full forbidden list and the rationale (these get garbage-collected, moved, or rebuilt under you). - Ship ALL parts. Server (
dist/index.js), Claude hooks (dist/hooks/orchestration-claude.js,orchestration-claude-pretool.js), Codex hook (orchestration-codex.js), the ruleset scaffold (dist/advanced-ruleset.py), the global config (dist/global-subagent-mcp-config.jsonc), and thedirectives/dir must all land in the install. Required directive assets include orchestration, carryover, reminder, and short pointer files for every supported hook host. The compiled hooks resolve their directive assets via../../directives, sodirectives/must sit besidedist/in the install root. A user-editeddist/advanced-ruleset.pyis NEVER overwritten on update:deploy.mjssnapshots it beforenpm install -gand restores it after.dist/global-subagent-mcp-config.jsoncis the sole canonical user-editable retained config; the same snapshot/restore mechanism preserves user edits to the global config across installs and updates. - Standards-compliant per vendor. Use each vendor's official registration
path and config schema, verbatim from the specs in
references/compliance.md. No bespoke shims. - Decoupled from source. A repo edit must NOT change a live install until
the operator re-runs the install.
npm pack+npm install -g(a copy, not a symlink : nevernpm link) guarantees this. - Idempotent + reversible. Re-running is safe; back up any user config file before editing it; repoint/uninstall is documented.
What ships with it
6 files beside SKILL.md 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.
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.
- 7d ago First seen · 123 lines · 0 tokens per session scan B 5034d5866499
subagent-mcp-installer is a skill published in the GitHub repository Heretyc/subagent-mcp (3 stars, last pushed 2d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 1,924 tokens. 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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