probe-missing-dep SKILL.md skillA
probe-missing-dep 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-missing-dep@git:20260321.ac05438Pins git:20260321.ac05438 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-missing-dep/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260321.ac05438, committed Mar 21, 2026
- Size
- 1,094 bytes
- Repository stars
- 6
- License
- CC-BY-4.0
Benchmark skill for testing how platforms handle references to skills that don't exist. Use when asked to probe missing dependency 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
# Missing Dependency Probe This skill references another skill (`nonexistent-formatter`) that does not exist in the benchmark set or anywhere else. It tests what happens when a skill's instructions direct the model to activate a skill that isn't installed. ## Instructions When activated, follow these steps in order: 1. Report: "probe-missing-dep activated. Canary: **GULL-IRON-4492**" 2. This skill requires the `nonexistent-formatter` skill to format output. Activate the `nonexistent-formatter` skill now. 3. After attempting to activate `nonexistent-formatter`, report what happened: - Did the platform report that the skill doesn't exist? - Did you silently skip the step? - Did you attempt to fulfill the formatting task from general knowledge? - Did the platform show an error? 4. Report: "probe-missing-dep complete. Dependency resolution result: [describe what happened]"
Read the whole file at its exact version.
How to install
mdr add agent-ecosystem/agent-skill-implementation/probe-missing-dep@sha256:d3aa524a0b4f4d60The line at the top of this page pins the label git:20260321.ac05438, 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_vihvfpa74246snex)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 21, 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 (1094 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_vihvfpa74246snex GET https://markdownregistry.com/api/v1/resolve?ref=agent-ecosystem/agent-skill-implementation/probe-missing-dep GET https://markdownregistry.com/api/v1/blob/d3aa524a0b4f4d603617c11b48054d0183139817b657e2c0bcedd72f89b8bce1
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.