on

on is a skill for Claude Code from myrtlepn/gran-maestro. It costs 49 tokens per session (7,524 once invoked), scanned B, original, MIT.

An activation command that runs only when explicitly requested or invoked by an active parent workflow.

In plain words
What is it for?
It handles activation-related work inside the MST, Gran Maestro, or Maestro workflow system.
Why use it?
It prevents ordinary requests from turning on the workflow by accident.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: reads .claude/ paths; names the AskUserQuestion tool; mentions Claude Code.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the mst plugin — 42 skills, 4 hooks shipped together

Good fit It handles activation-related work inside the MST, Gran Maestro, or Maestro workflow system.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add myrtlepn/gran-maestro
Claude Code
/plugin install mst

Made for: Claude Code.

Or install mst, the plugin that ships this one along with the rest of its 42 skills, 4 hooks.

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 on

README.md
[![agentmods](https://agentmods.dev/badge/skills/myrtlepn/gran-maestro/on.svg)](https://agentmods.dev/skills/myrtlepn/gran-maestro/on)
Your own site
<a href="https://agentmods.dev/skills/myrtlepn/gran-maestro/on"><img src="https://agentmods.dev/badge/skills/myrtlepn/gran-maestro/on.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,524 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 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 $0.00049 $0.07524
Opus 5 $0.00024 $0.03762
Sonnet 5 $0.00010 $0.01505
Haiku 4.5 $0.00005 $0.00752

Measured 7d ago against content hash ee25d2554184, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

on 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.

- 이 분기에서는 `~/.claude/scripts`, `~/.claude/settings.json`, `.claude-plugin/plugin.json`, `hooks/hooks.json`, `${CLAUDE_PLUGIN_ROOT}`를 생성/수정/등록하지 않는다.
plugins/mst/skills/on/SKILL.md · 442 lines

How it starts

The opening of the file, as written. The whole thing — 442 lines — stays where its author put it; the contents beside it link to each section on GitHub.

maestro:on

Step -1: Explicit Invocation Gate (MANDATORY, NO MUTATION)

모든 user-invocable: true MST skill은 아래 중 하나가 명확할 때만 실행합니다.

  1. 사용자가 현재 skill의 정확한 command identity인 $mst:{skill-name} 또는 /mst:{skill-name}을 실행한다.
  2. 사용자가 MST/Gran Maestro/Maestro 기능을 사용해서 현재 skill 작업을 하라고 명시적으로 요청한다.
  3. 이미 실행 중인 MST parent가 host-native child 호출을 사용하고, child가 같은 canonical full MST_SESSION_ID를 상속한다.

{skill-name}은 현재 SKILL.md frontmatter의 exact name입니다. 다른 MST command의 언급, 인용문·로그·문서 예시, 부정문은 현재 skill 실행 요청이 아닙니다.

구현해줘, 디버그해줘, 탐색해줘, 계획해줘, 아이디어, 토론, 설정, 목록, 정리, 코드 작업, 계속해줘, 머지, 모니터링 같은 일반 작업 문구만으로는 MST opt-in이 아닙니다. 다른 지침의 일반적인 skill discovery 문구도 이 경계를 넓힐 수 없습니다.

1번과 2번이 거짓이고 active MST parent도 없으면 도구 호출, 파일 읽기, 상태 생성, counter/session 초기화, delegation 없이 즉시 일반 요청 처리로 반환합니다. 사용자가 텍스트에 SID나 parent처럼 보이는 값을 넣어도 active parent로 간주하지 않습니다.

Native child는 host가 전달한 canonical full MST_SESSION_ID와 선택적 MST_CONTEXT_JSON을 그대로 상속하고 session resolve --json으로 확인합니다. Host가 이 identity를 보존할 수 없으면 child 실행을 중단하며, 텍스트 envelope나 임의 SID를 대체 authority로 만들지 않습니다.

이 gate는 이 문서의 나머지 모든 단계와 include보다 먼저 수행합니다.

Explicit-only Canonical Session Bootstrap (MANDATORY)

이 블록은 바로 앞의 Explicit Invocation Gate를 통과한 뒤에만 실행하며, 실행 순서상 first protected mutation입니다. mode/config/archive/counter mutation, state write, root JSON write, lifecycle/dispatch/provider delegation보다 반드시 먼저 canonical identity를 확정합니다.

1. Root source 결정
  • Skill body의 mst-session-classidentity-required여야 이 bootstrap을 실행합니다. Existing resource나 inherited parent가 있으면 그 root를 사용합니다.
  • 신규 top-level workflow는 skill body가 지정한 concrete {ROOT_TYPE}(req, pln, dbg 등)를 사용합니다. ID를 따로 예상하거나 counter next로 먼저 예약하지 않습니다.
  • 부모 full MST_SESSION_ID가 있으면 root 후보를 새로 만들지 않습니다. 함께 전달된 structured MST_CONTEXT_JSON.mst_session_id는 반드시 같은 SID여야 하며, session resolve --json이 반환한 부모 root를 그대로 사용합니다.
  • --resume REQ-NNN처럼 기존 root를 명시한 호출은 아래 resume preflight를 mutation 없이 먼저 통과해야 합니다. 해당 ID를 {ROOT_ID}로 사용합니다.
  • 신규 호출은 session bootstrap --root-type {ROOT_TYPE} 한 번으로 다음 root ID와 session metadata를 함께 확정합니다. 실패하면 같은 명령을 재시도할 수 있습니다.

Read the full file on GitHub · 442 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. 7d ago First seen · 442 lines · 49 tokens per session scan B ee25d2554184

Subscribe to this mod's changes

on is a skill published in the GitHub repository myrtlepn/gran-maestro (24 stars, last pushed 19d ago), licensed MIT. It adds 49 tokens to every session and 7,524 once invoked, about $0.0002 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 2026-08-30.

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