sqlspn-review SKILL.md skillB
sqlspn-review from vanterx/mssql-performance-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add vanterx/mssql-performance-skills/sqlspn-review@git:20261027.3c735c4Pins git:20261027.3c735c4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- vanterx/mssql-performance-skills
- Path
skills/sqlspn-review/SKILL.md- Versions recorded
- 6
- Latest version
- git:20261027.3c735c4, committed Oct 27, 2026
- First version recorded
- Jun 5, 2026
- Size
- 54,655 bytes
- Repository stars
- 12
- License
- MIT
Analyzes SQL Server SPN (Service Principal Name) configuration and Kerberos delegation settings to diagnose authentication failures, NTLM fallback, and double-hop connectivity problems. Use this skill when users receive Kerberos errors, "Cannot generate SSPI context", ANONYMOUS LOGON failures, linked servers fall back to NTLM, AG listener connections fail, or constrained delegation is needed for a middle-tier application, and you need to identify missing, duplicate, or misconfigured SPNs and…
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
# SQL Server SPN and Kerberos Delegation Review Skill ## Purpose Analyze SQL Server SPN configuration and Active Directory delegation attributes to surface Kerberos authentication failures, NTLM fallback causes, and double-hop connectivity problems. Applies 54 checks (K1–K54) across eleven categories: - **K1–K6** — MSSQLSvc SPN presence: default instance, named instance, FQDN variant, short-hostname variant, port mismatch, and FCI Virtual Network Name - **K7–K11** — Service account binding: SPN on wrong account, duplicate SPNs, machine account vs domain account, stale SPNs from old accounts, MSA/gMSA auto-registration gaps - **K12–K16** — AG listener and alias: listener SPN, named instance port conflict, SQL Browser, alias SPN, multi-subnet listener coverage - **K17–K20** — Configuration and permissions: HTTP SPN, registration permission gap, unconstrained delegation, NTLM fallback signal - **K21–K25** — Kerberos delegation — service account: constrained delegation (KCD) not configured, missing target SPN, protocol transition, RBCD misconfiguration, delegation scope - **K26–K30** — AD account and computer sensitivity: AccountNotDelegated on end-user, Protected …
Read the whole file at its exact version.
How to install
mdr add vanterx/mssql-performance-skills/sqlspn-review@sha256:e201f62a0220efacThe line at the top of this page pins the label git:20261027.3c735c4, 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_yxvmbushmnr6g2ve)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Jun 5, 2026 and Oct 27, 2026, about one every 29 days. Its first recorded version is graded A and its latest B.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261027.3c735c4 latest | 2026-10-27 | 3c735c4 | 54,655 B | B | view · diff |
| git:20261006.2c73ad2 | 2026-10-06 | 2c73ad2 | 54,036 B | B | view · diff |
| git:20260907.492bd70 | 2026-09-07 | 492bd70 | 52,842 B | A | view · diff |
| git:20260621.d1ce43d | 2026-06-21 | d1ce43d | 29,887 B | A | view · diff |
| git:20260607.6ff4f7a | 2026-06-07 | 6ff4f7a | 29,699 B | A | view · diff |
| git:20260605.9ec0ebe | 2026-06-05 | 9ec0ebe | 28,521 B | A | view |
Audit of the latest version
- fail: No prompt-injection phrasing (matched: ignore the previous instructions)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (54655 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 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
vanterx/mssql-performance-skills · 12 stars · license MIT · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yxvmbushmnr6g2ve GET https://markdownregistry.com/api/v1/resolve?ref=vanterx/mssql-performance-skills/sqlspn-review GET https://markdownregistry.com/api/v1/blob/e201f62a0220efaca0c2be05340e713cfd58fb9bb921a8e0071744b314663304
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.