setup-extension

setup-extension is a skill for Claude Code from myrtlepn/gran-maestro. It costs 55 tokens per session (2,595 once invoked), scanned B, original, MIT.

A setup procedure for an MST extension, where MST refers to the Maestro tooling used to run certain project workflows.

In plain words
What is it for?
It helps explicitly start the setup-extension process and pass the required session identity to related workflows.
Why use it?
It ensures the setup runs only when the exact extension command or an explicit MST request is provided, avoiding unintended changes.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

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

Good fit It helps explicitly start the setup-extension process and pass the required session identity to related workflows.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/myrtlepn/gran-maestro/setup-extension
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 myrtlepn/gran-maestro --skill setup-extension
Clone the repo
git clone --depth 1 https://github.com/myrtlepn/gran-maestro

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 setup-extension

README.md
[![agentmods](https://agentmods.dev/badge/skills/myrtlepn/gran-maestro/setup-extension.svg)](https://agentmods.dev/skills/myrtlepn/gran-maestro/setup-extension)
Your own site
<a href="https://agentmods.dev/skills/myrtlepn/gran-maestro/setup-extension"><img src="https://agentmods.dev/badge/skills/myrtlepn/gran-maestro/setup-extension.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,595 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 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 $0.00055 $0.02595
Opus 5 $0.00028 $0.01298
Sonnet 5 $0.00011 $0.00519
Haiku 4.5 $0.00006 $0.00260

Measured 7d ago against content hash 462fe2aee80e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

setup-extension scanned grade B with 2 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 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

| 클립보드 복사 실패 (Linux) | `xclip`/`wl-copy` 미설치 | `sudo apt install xclip` 또는 `sudo apt install wl-clipboard` 설치 후 재실행 |

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- `curl -s --max-time 5 http://127.0.0.1:{port}/` 실행 (Bash)
plugins/mst/skills/setup-extension/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.

maestro:setup-extension

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.

이 skill은 canonical session lifecycle/state/delegation/dispatch/provider identity를 소비하거나 변경하지 않는 session-independent administrative/read/config utility입니다. 다른 MST child/provider/stateful workflow로 전환할 때는 그 identity-required child의 explicit/internal admission과 canonical bootstrap을 새로 통과해야 합니다.

/mst:setup-extension은 Gran Maestro Chrome Extension(UI Picker)을 Load Unpacked 방식으로 설치하도록 안내합니다. Extension 경로 확인, Chrome 확장 프로그램 페이지 오픈, 설치 안내 및 클립보드 복사, Dashboard 서버 연결 확인의 4단계를 순서대로 실행합니다.

실행 프로토콜

{PLUGIN_ROOT} 경로 규칙: {PLUGIN_ROOT}는 이 스킬의 "Base directory"에서 skills/{스킬명}/을 제거한 절대경로입니다. 상대경로(.claude/...)는 절대 사용하지 않습니다.

Step 1: Extension 경로 확인

  • {PLUGIN_ROOT}/extension/ 디렉토리 존재 여부를 Bash ls로 확인
  • 디렉토리가 없으면: 아래 메시지를 출력하고 중단

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. 7d ago First seen · 167 lines · 55 tokens per session scan B 462fe2aee80e

Subscribe to this mod's changes

setup-extension is a skill published in the GitHub repository myrtlepn/gran-maestro (24 stars, last pushed 19d ago), licensed MIT. It adds 55 tokens to every session and 2,595 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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