probe-long-description SKILL.md skillA
probe-long-description 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-description@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-description/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260801.688ea1a, committed Aug 1, 2026
- Size
- 2,308 bytes
- Repository stars
- 6
- License
- CC-BY-4.0
Benchmark skill whose description deliberately runs past the spec's 1024-character limit, to test oversize field handling. Use when asked to probe oversize description handling. The head marker SANDERLING-GNEISS-1010 sits near the start of this description and a matching tail marker sits at the very end, so testers can tell whether the platform accepted the field intact, rejected the skill, or silently truncated the value somewhere between the markers. Everything from here on is deliberate…
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 Description Probe The spec's `description` field "must be 1-1024 characters." This skill's description is over 1100 characters and is otherwise a normal, valid description. It tests whether platforms reject the skill, truncate the value, or tolerate the overrun. The description carries a head marker near its start and a tail marker as its final characters (bird-mineral phrases; the head marker's bird is SANDERLING and the tail marker's bird is WHIMBREL). A listing that shows the head but not the tail reveals truncation and roughly where it happened. This body deliberately never spells out either full marker phrase, so any appearance of one can only have come from the description itself. ## Canary Phrase The canary phrase for this skill's body is: **BITTERN-HALITE-2264** ## Instructions When activated, report: 1. "probe-long-description activated. Canary: **BITTERN-HALITE-2264**" 2. **Description visibility**: Looking only at your catalog entry for this skill (not this file), can you see the SANDERLING head marker, the WHIMBREL tail marker, both, or neither? Quote exactly what the catalog shows.
Read the whole file at its exact version.
How to install
mdr add agent-ecosystem/agent-skill-implementation/probe-long-description@sha256:b4a794b62f9c4c60The 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_pzvme46iyrwimhyq)
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 (2308 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_pzvme46iyrwimhyq GET https://markdownregistry.com/api/v1/resolve?ref=agent-ecosystem/agent-skill-implementation/probe-long-description GET https://markdownregistry.com/api/v1/blob/b4a794b62f9c4c60cefb939fe5d3a41e802625a3fc148503612dafb6af4d762b
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.