Microsoft Fabric Skills is a collection of reusable instructions and MCP systems that help AI assistants work with Microsoft Fabric workloads, APIs, queries, and operations. It is intended for users of GitHub Copilot CLI and compatible coding tools; the catalogue entries are the skills, agents, instructions, MCP systems, plugins, and rules distributed by the project.
Borrowing it
Nothing to install: this file belongs to microsoft/skills-for-fabric. 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/microsoft/skills-for-fabric/main/.windsurfrulesgit clone --depth 1 https://github.com/microsoft/skills-for-fabricWrote 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/rules/microsoft/skills-for-fabric/windsurfrules)<a href="https://agentmods.dev/rules/microsoft/skills-for-fabric/windsurfrules"><img src="https://agentmods.dev/badge/rules/microsoft/skills-for-fabric/windsurfrules/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/rules/microsoft/skills-for-fabric/windsurfrules"><img src="https://agentmods.dev/badge/rules/microsoft/skills-for-fabric/windsurfrules.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 | $0.02637 | $0.02637 |
| Opus 5.5 | $0.01055 | $0.01055 |
| Sonnet 5.5 | $0.00527 | $0.00527 |
| Haiku 4.5 | $0.00264 | $0.00264 |
Grade A, and why
windsurfrules 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 today.
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 — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Microsoft Fabric Development Rules for Windsurf
Updates: These instructions do not run a session-start update check. Refresh them
through your host's plugin or marketplace update flow, or run "git pull" if you use
a manual clone.
project_context: | This project uses Microsoft Fabric for data engineering, warehousing, and analytics. Primary API reference: https://learn.microsoft.com/en-us/rest/api/fabric/articles/ All Fabric operations require Azure AD auth: run 'az login', then 'az account get-access-token --resource https://api.fabric.microsoft.com'. Repository layering is Agents -> Skills -> Common. For cross-endpoint orchestration (like medallion architecture), use agents/FabricDataEngineer.agent.md first, then delegate depth work to skills/.
rules:
Lakehouse & Spark
-
name: delta_lake_format description: Always use Delta Lake format for Lakehouse tables pattern: "spark.write.format("delta")"
-
name: mssparkutils_usage description: Use mssparkutils for Fabric-specific operations applies_to: [".py", ".ipynb"]
-
name: spark_optimization description: Run OPTIMIZE and VACUUM for Delta table maintenance
Warehouse
-
name: tsql_surface_area description: Check T-SQL surface area - not all SQL Server features supported reference: https://learn.microsoft.com/en-us/fabric/data-warehouse/tsql-surface-area
-
name: limit_queries description: Always use TOP/LIMIT when exploring data pattern: "SELECT TOP"
KQL (Real-Time Intelligence)
-
name: kql_time_filter description: Always include time filters in KQL queries pattern: "where Timestamp > ago("
-
name: kql_has_over_contains description: Use 'has' over 'contains' for indexed string search in KQL pattern: "| where .* has "
-
name: kql_idempotent_schema description: Use .create-merge table and .create-or-alter function for safe KQL schema deployment pattern: ".create-merge table"
-
name: kql_skills description: Use eventhouse-cli authoring mode for writes and consumption mode for read-only KQL reference: skills/eventhouse-cli/SKILL.md
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.
- today Changed · +9 lines · +418 tokens per session f448121c76a9
- 7d ago Changed · +34 tokens per session 6d533987141f
- 1mo ago Changed · +4 lines · +53 tokens per session a85774e71e24
- 1mo ago Changed · +8 lines · +138 tokens per session eeea09eda001
- 1mo ago Changed · -12 lines · -122 tokens per session da5827dd5e9e
- 2mo ago First seen · 181 lines · 2,116 tokens per session scan A cd3dbacb24eb
windsurfrules is a cursor rule published in the GitHub repository microsoft/skills-for-fabric (1,321 stars, last pushed yesterday), licensed MIT. It adds 2,637 tokens to every session, about $0.0105 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 2026-09-07.
windsurfrules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| windsurfrulesmicrosoft/skills-for-fabric | Cursor rule | 1.3k | yesterday | MIT | A | 2,637 | Windsurf |
| tensorflownedcodes-ok/cursorrules-collection | Cursor rule | 38 | 8mo ago | MIT | A | 413 | Cursor |
| 006_Program_of_Thought_TutorialAIFlowML/cursor_rules | Cursor rule | 24 | 1y ago | none | A | 24 | Cursor |
| standards-data-engrwking/wellness_planner | Cursor rule | 0 | 8mo ago | none | A | 170 | Cursor |
| ponytailDietrichGebert/ponytail | Cursor rule | 185k | 8d ago | MIT | A | 604 | Cursor |
| angular-20angular/angular | Cursor rule | 101k | yesterday | MIT | A | 0 | Cursor |
| dev-standardapache/superset | Cursor rule | 75k | today | Apache-2.0 | A | 1,147 | Cursor |