A guide for controlling who can see data in Power BI semantic models. Row-level security limits visible rows, while object-level security hides specific tables or columns.

Use it to set up user- or role-based access, regional and manager hierarchies, multi-tenant models, protected columns, and security tests.

It helps prevent users from seeing records or fields that their role should not access, including in models shared by multiple organisations.

How kpbray/power-bi-agent-skills configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to kpbray/power-bi-agent-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.

Copy the file

curl -O https://raw.githubusercontent.com/kpbray/power-bi-agent-skills/master/.github/skills/security/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/kpbray/power-bi-agent-skills

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/kpbray/power-bi-agent-skills/security/github.svg)](https://agentmods.dev/skills/kpbray/power-bi-agent-skills/security)

Your own site

<a href="https://agentmods.dev/skills/kpbray/power-bi-agent-skills/security"><img src="https://agentmods.dev/badge/skills/kpbray/power-bi-agent-skills/security/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/kpbray/power-bi-agent-skills/security"><img src="https://agentmods.dev/badge/skills/kpbray/power-bi-agent-skills/security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,563 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00038	$0.02563
Opus 5.5	$0.00015	$0.01025
Sonnet 5.5	$0.00008	$0.00513
Haiku 4.5	$0.00004	$0.00256

Measured 2mo ago against content hash 933c74c3877f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

security 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 2mo 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.

.github/skills/security/SKILL.md · 455 lines

How it starts

The opening of the file, as written. The whole thing — 455 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Skill

This skill helps implement Row-Level Security (RLS) and Object-Level Security (OLS) for Power BI semantic models.

When to Use This Skill

Restricting data access by user/role
Implementing dynamic security based on user identity
Creating multi-tenant data models
Protecting sensitive columns with OLS
Setting up manager/hierarchy security
Testing security configurations

Security Types

Type	Controls	Use Case
RLS (Row-Level Security)	Which rows users can see	Regional sales reps see only their region
OLS (Object-Level Security)	Which columns/tables users can see	Hide salary column from non-HR users

Row-Level Security (RLS)

TMDL Syntax

role 'Sales Representatives'
	modelPermission: read
	lineageTag: <guid>

	tablePermission Sales = 'Sales'[Region] = USERPRINCIPALNAME()

Role Structure

role 'RoleName'
	modelPermission: read
	description: 'Description of who this role is for'
	lineageTag: <guid>

	tablePermission TableName = <DAX filter expression>
	tablePermission AnotherTable = <DAX filter expression>

Model Permissions

Permission	Description
`read`	Can read data (standard for RLS)
`administrator`	Full access (no filtering)
`none`	No access

Common RLS Patterns

Static Role (Fixed Filter)

/// Role for West region users
role 'West Region'
	modelPermission: read
	lineageTag: {{guid}}

	tablePermission Sales = 'Sales'[Region] = "West"

Dynamic Security (User Identity)

/// Each user sees only their own data
role 'User Data'
	modelPermission: read
	lineageTag: {{guid}}

	tablePermission Sales =
		'Sales'[User Email] = USERPRINCIPALNAME()

Security Table Lookup

/// Users mapped to regions in a security table
role 'Region Security'
	modelPermission: read
	lineageTag: {{guid}}

	tablePermission Sales =
		CONTAINS(
		    FILTER(
		        'User Region Mapping',
		        'User Region Mapping'[User Email] = USERPRINCIPALNAME()
		    ),
		    'User Region Mapping'[Region], 'Sales'[Region]
		)

Read the full file on GitHub · 455 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

2mo ago First seen · 455 lines · 38 tokens per session scan A 933c74c3877f

Subscribe to this mod's changes

security is a skill published in the GitHub repository kpbray/power-bi-agent-skills (10 stars, last pushed 9mo ago), licensed MIT. It adds 38 tokens to every session and 2,563 once invoked, about $0.0002 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.

Analytics and metrics Security

security next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
securitykpbray/power-bi-agent-skills	Skill	10	9mo ago	MIT	A	38	Claude Code, Codex
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	today	MIT	A	103	Claude Code

power-bi-agent-skills: Skill for Claude Code