upstream SKILL.md skillA
upstream 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/upstream@git:20260908.0a90938Pins git:20260908.0a90938 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nexaduo/marc
- Path
harnesses/claude-code/marc/skills/upstream/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260908.0a90938, committed Sep 8, 2026
- Size
- 5,625 bytes
- Repository stars
- 7
- License
- MIT
Opt-in upstream contribution workflow for process improvements and field lessons. Scans the consuming repo's local AGENTS.md, .agents/team.toml, and commit history for emergent rules, sanitizes sensitive client context, formats governed rule origins, and drafts an upstream Pull Request or Issue to the upstream mARC repository — without ever leaking private context. Invoke with /marc:upstream.
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:upstream — upstream process improvements & field lessons You are running the **mARC upstream contribution workflow** (persona: `@scribe`). Your job is to help the team in a consuming repository capture high-value operational lessons, rule refinements, or bugfixes discovered in the field and contribute them back to the upstream mARC product repo — **safely, sanitarily, and with explicit human opt-in**. --- ## Operating Invariant: Context Gating & Zero Leakage <!-- rules:origin-required --> - **Self-improvement is context-gated — no autonomous upstream writes.** When mARC runs installed in a user's repository, product-level improvements must NEVER be pushed autonomously. All upstream contributions are opt-in, human-approved, and strictly sanitized before submission. (origin: #46 · 2026-07-06) - **Hard Anti-Anchoring & Genericization Gate.** Every candidate rule or improvement destined for upstream must be 100% stack-agnostic. Remove all references to the consuming repository's stack, company name, private service names, internal URLs, credentials, and internal issue numbers. (origin: #66 · 2026-07-09) …
Read the whole file at its exact version.
How to install
mdr add nexaduo/marc/upstream@sha256:c3bcb4b053703347The line at the top of this page pins the label git:20260908.0a90938, 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_rcxxqnyjg5ltf22o)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 8, 2026.
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 (5625 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_rcxxqnyjg5ltf22o GET https://markdownregistry.com/api/v1/resolve?ref=nexaduo/marc/upstream GET https://markdownregistry.com/api/v1/blob/c3bcb4b05370334781979fd254e79d32191230bd4aef145ea6fc7120a84261d3
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.