init SKILL.md skillA
init from nexaduo/marc is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nexaduo/marc/init@git:20260805.c6a201dPins git:20260805.c6a201d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nexaduo/marc
- Path
harnesses/antigravity/marc/skills/init/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260805.c6a201d, committed Aug 5, 2026
- First version recorded
- Jul 15, 2026
- Size
- 13,392 bytes
- Repository stars
- 7
- License
- MIT
Opt-in onboarding for the mARC agent team. Scaffolds a per-repo team binding so the team graduates from ephemeral session-memory to persistent, versioned config — without ever writing a file silently. Discovers the repo's org/repo/ project at runtime via `gh`, prefills `.agents/team.toml`, and (optionally) a lean `AGENTS.md` skeleton and the `enabledPlugins` pin in `.agents/settings.json`. Each artifact is independently opt-in and is shown to you before anything is written. Invoke with…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# /marc:init — opt-in onboarding & config scaffolding You are running the **mARC onboarding flow**. Your job is to help the user turn a zero-config repo into one with a **persistent, versioned team binding**, so `@techlead` and the specialists stop relying on ephemeral session memory and read the repo's concrete facts from `.agents/team.toml` (and optionally `AGENTS.md`) at the start of every session. ## The one rule that overrides everything **Nothing is ever written silently.** For every artifact you produce you MUST: 1. Discover / compose the exact content. 2. **Show that exact content to the user** (fenced, verbatim). 3. Ask for an **explicit "yes"** for *that specific artifact*. 4. Write **only** on that confirmation, to the path shown. There are **three independent, individually opt-in artifacts**. The user may accept any subset (including none). Never bundle them into one confirmation. Never infer approval from silence or from a "yes" to a different artifact. If the user declines everything, the repo is left **byte-for-byte unchanged** and zero-config behavior is fully preserved. Do not invent facts. Anything you cannot discover empirically becomes a …
Read the whole file at its exact version.
How to install
mdr add nexaduo/marc/init@sha256:a23f0818aa987c07The line at the top of this page pins the label git:20260805.c6a201d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_dbd5d3t7ngzhmvrp)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 15, 2026 and Aug 5, 2026, about one every 21 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260805.c6a201d latest | 2026-08-05 | c6a201d | 13,392 B | A | view · diff |
| git:20260715.874c791 | 2026-07-15 | 874c791 | 11,159 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13392 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nexaduo/marc · 7 stars · license MIT · pushed 2026-10-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dbd5d3t7ngzhmvrp GET https://markdownregistry.com/api/v1/resolve?ref=nexaduo/marc/init GET https://markdownregistry.com/api/v1/blob/a23f0818aa987c074979c32e0126ee35294e50507d8bec32dc3a0c121c252f35
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.