not-hello SKILL.md skillB
not-hello from kyure-a/agent-skills-nix is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kyure-a/agent-skills-nix/not-hello@git:20260810.1594ba4Pins git:20260810.1594ba4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kyure-a/agent-skills-nix
- Path
test/fixtures/agent-plugin/invalid-frontmatter/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260810.1594ba4, committed Aug 10, 2026
- Size
- 198 bytes
- Repository stars
- 275
- License
- MIT
Intentionally has a name that does not match its exported directory.
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
# Invalid frontmatter fixture This skill must be rejected when it is exported as `hello`.
Read the whole file at its exact version.
How to install
mdr add kyure-a/agent-skills-nix/not-hello@sha256:b3f7b7d25440d00cThe line at the top of this page pins the label git:20260810.1594ba4, 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_wzdxk2zb7jnnfk5z)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 10, 2026.
Audit of the latest version
- fail: Size between 200 bytes and 200 KB (198 bytes)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
kyure-a/agent-skills-nix · 275 stars · license MIT · pushed 2026-10-26 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_wzdxk2zb7jnnfk5z GET https://markdownregistry.com/api/v1/resolve?ref=kyure-a/agent-skills-nix/not-hello GET https://markdownregistry.com/api/v1/blob/b3f7b7d25440d00cd91e921d7cb4ffd72e08aa7884a244cbd305c6c5dd66ba04
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.