probe-malformed-yaml SKILL.md skillA
probe-malformed-yaml from agent-ecosystem/agent-skill-implementation is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add agent-ecosystem/agent-skill-implementation/probe-malformed-yaml@git:20260801.3a93818Pins git:20260801.3a93818 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- agent-ecosystem/agent-skill-implementation
- Path
benchmark-skills/probe-malformed-yaml/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260801.3a93818, committed Aug 1, 2026
- Size
- 837 bytes
- Repository stars
- 6
- License
- CC-BY-4.0
Use when: asked to probe malformed yaml parsing behavior.
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
# Malformed YAML Probe
This skill's frontmatter description contains an unquoted colon, which is
technically invalid YAML ("mapping values are not allowed here" in strict
parsers) but is a common authoring mistake that some clients' parsers
tolerate or repair. The client implementation guide recommends a lenient
fallback; this skill tests whether the platform has one.
## Canary Phrase
The canary phrase for this skill is: **QUAIL-FELDSPAR-7448**
## Instructions
When activated, report:
1. "probe-malformed-yaml activated. Canary: **QUAIL-FELDSPAR-7448**"
2. **Description visibility**: What description do you see for this skill
in your catalog, if any? Was it repaired (quoted), truncated at the
colon, or intact?Read the whole file at its exact version.
How to install
mdr add agent-ecosystem/agent-skill-implementation/probe-malformed-yaml@sha256:8ada1d5e52cceed5The line at the top of this page pins the label git:20260801.3a93818, 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_n4hftw3v62b5sfbm)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 1, 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 (837 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
agent-ecosystem/agent-skill-implementation · 6 stars · license CC-BY-4.0 · pushed 2026-09-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_n4hftw3v62b5sfbm GET https://markdownregistry.com/api/v1/resolve?ref=agent-ecosystem/agent-skill-implementation/probe-malformed-yaml GET https://markdownregistry.com/api/v1/blob/8ada1d5e52cceed56c68b048b7038cccbf7fcda33ab975e3b3a9cb311546b51f
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.