sentinel-probe SKILL.md skillA
sentinel-probe from guust-franssens/tableau-to-powerbi-migration is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add guust-franssens/tableau-to-powerbi-migration/sentinel-probe@git:20260730.fec60c5Pins git:20260730.fec60c5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- guust-franssens/tableau-to-powerbi-migration
- Path
.github/skills/sentinel-probe/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260730.fec60c5, committed Jul 30, 2026
- Size
- 486 bytes
- Repository stars
- 17
- License
- MIT
Test-only skill used to determine whether repository skills are visible to a custom-agent subagent. Contains a unique sentinel token. Not part of the migration pipeline.
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
# Sentinel probe skill This file exists ONLY to answer one question: can a custom agent running as a subagent see repository skills under `.github/skills/`? The sentinel token is: SKILL_SENTINEL_ZEPHYR_74193 If an agent can quote that token, repository skills reach it.
Read the whole file at its exact version.
How to install
mdr add guust-franssens/tableau-to-powerbi-migration/sentinel-probe@sha256:3c20d070873f57ebThe line at the top of this page pins the label git:20260730.fec60c5, 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_uuosgzecmfdv3h7n)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 30, 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 (486 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
guust-franssens/tableau-to-powerbi-migration · 17 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_uuosgzecmfdv3h7n GET https://markdownregistry.com/api/v1/resolve?ref=guust-franssens/tableau-to-powerbi-migration/sentinel-probe GET https://markdownregistry.com/api/v1/blob/3c20d070873f57eb20db9fac812134b84bfb71bda141e6605388aee4eaf54c22
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.