probe-long-compatibility SKILL.md skillA
probe-long-compatibility 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-long-compatibility@git:20260801.688ea1aPins git:20260801.688ea1a 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-long-compatibility/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260801.688ea1a, committed Aug 1, 2026
- Size
- 1,785 bytes
- Repository stars
- 6
- License
- CC-BY-4.0
Benchmark skill whose compatibility field runs past the spec's 500-character limit. Use when asked to probe oversize compatibility handling.
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
# Oversize Compatibility Probe The spec's `compatibility` field "must be 1-500 characters if provided." This skill's compatibility value is over 500 characters and is otherwise ordinary requirement prose. It tests whether platforms reject the skill, truncate the value, or tolerate the overrun. The compatibility value ends with a tail marker (a bird-mineral phrase whose bird is TURNSTONE) so truncation is detectable wherever the value surfaces. This body deliberately never spells out the full marker phrase, so any appearance of it can only have come from the compatibility value itself. ## Canary Phrase The canary phrase for this skill's body is: **KESTREL-BAUXITE-6690** ## Instructions When activated, report: 1. "probe-long-compatibility activated. Canary: **KESTREL-BAUXITE-6690**" 2. **Field visibility**: Can you see a compatibility value for this skill anywhere other than by reading this file, and if so, does it end with the TURNSTONE tail marker? Quote exactly what you see.
Read the whole file at its exact version.
How to install
mdr add agent-ecosystem/agent-skill-implementation/probe-long-compatibility@sha256:1b49bd9a56a0e0d4The line at the top of this page pins the label git:20260801.688ea1a, 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_rzseq4e454gmg7fh)
3 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 (1785 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_rzseq4e454gmg7fh GET https://markdownregistry.com/api/v1/resolve?ref=agent-ecosystem/agent-skill-implementation/probe-long-compatibility GET https://markdownregistry.com/api/v1/blob/1b49bd9a56a0e0d4c2e5944ee9610819a38a5effcdf75312ce30eb0cc00aae8d
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.