Borrowing it
Nothing to install: this file belongs to vanterx/mssql-performance-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vanterx/mssql-performance-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/vanterx/mssql-performance-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/vanterx/mssql-performance-skills/claude-md)<a href="https://agentmods.dev/instructions/vanterx/mssql-performance-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/vanterx/mssql-performance-skills/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/vanterx/mssql-performance-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/vanterx/mssql-performance-skills/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.12560 | $0.12560 |
| Opus 5.5 | $0.05024 | $0.05024 |
| Sonnet 5.5 | $0.02512 | $0.02512 |
| Haiku 4.5 | $0.01256 | $0.01256 |
Grade A, and why
mssql-performance-skills CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 335 lines — stays where its author put it; the contents beside it link to each section on GitHub.
mssql-performance-skills
A Claude Code skills library for SQL Server performance tuning — T-SQL static analysis, execution plan review, I/O statistics, workload traces, index recommendations, deadlock diagnosis, live blocking chain analysis, regression detection, and batch workload analysis.
Purpose
Provides twenty-nine slash-command skills — twenty-five specialised review skills, three SQL Server migration-readiness skills, plus one agentic orchestrator (mssql-performance-review) that dispatches the right specialised skill(s) to mixed artifact inputs. Specialised skills cover T-SQL source code, .sqlplan XML files, STATISTICS IO/TIME output, Profiler/XE trace data, deadlock graphs, index recommendations, live blocking chains (head blocker identification, lock escalation and Sch-M evidence, transaction and isolation design faults), wait statistics, Query Store data, procedure/trigger/function runtime stats collected from sys.dm_exec_procedure_stats, Always On AG health from sys.dm_hadr_* DMVs, Always On AG configuration correctness (prerequisites, replica design, listener architecture, backup strategy, endpoint security, distributed AG topology, Basic and Contained AG constraints), Windows Server Failover Cluster log files, SQL Server ERRORLOG files, SQL Server SPN and Kerberos delegation configuration, server memory pressure analysis, file-level I/O latency analysis, full encryption infrastructure (TDE, Always Encrypted, CLE, backup encryption, TLS, certificate/key lifecycle, key hierarchy, EKM, compliance), instance/database configuration drift (MAXDOP, Max Server Memory, auto-shrink, compatibility level, RCSI, VLF count, IFI, TempDB sizing, surface area), SQL Server Setup Bootstrap log analysis (failed installs/patches, setup rules, ConfigurationFile.ini review), SQL Server Reporting Services (SSRS) report server trace log analysis (trace configuration, database connectivity, memory/AppDomain recycling, report processing performance, subscription delivery, scale-out encryption keys), SQL Server migration readiness (version/edition/platform compatibility, security-object portability, operational-object portability) for moves between on-prem instances and to/from Azure SQL, and Windows Performance Monitor counter analysis for the host itself (CPU attribution between SQL Server and other processes, privileged/kernel time, page life expectancy shape, virtual address space growth, per-volume disk latency, compilation rates against batch throughput, client cancellation rate, capture integrity), and two-period workload comparison (baseline against current, fast day against slow day, before and after a change: per-query regressions matched by query_hash and classified as CPU-, reads- or wait-driven, new and disappeared heavy queries, execution-volume shifts, and configuration, version and wait-profile differences). No application code — content is Markdown only.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago Changed · +19 lines · +1,282 tokens per session faf5ec9bcd3e
- 18d ago Changed · +25 lines · +1,366 tokens per session 3e5edb6f542a
- 1mo ago Changed · +6 lines · +533 tokens per session 9fdea8e1ee2d
- 1mo ago Changed · +91 tokens per session 866860f9f2b0
- 1mo ago First seen · 285 lines · 9,288 tokens per session scan A 3ef5c4e44db8
mssql-performance-skills CLAUDE.md is an instructions file published in the GitHub repository vanterx/mssql-performance-skills (12 stars, last pushed 9d ago), licensed MIT. It adds 12,560 tokens to every session, about $0.0502 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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