rbac-audit

rbac-audit is a skill for Claude Code, Codex from microsoft/sre-agent. It costs 100 tokens per session (1,865 once invoked), scanned A, original, MIT.

A read-only review of who has access to a specific Azure resource group and how that access is actually used. RBAC means role-based access control, which assigns permissions through roles.

In plain words
What is it for?
Use it for a recurring least-privilege review of Azure role assignments, identities, groups, service accounts, and their activity-log usage.
Why use it?
It helps find permissions that are too broad, assigned outside normal controls, or left unused, so a human can decide whether to remove them.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/microsoft/sre-agent/rbac-audit
Any agent
npx skills add microsoft/sre-agent --skill rbac-audit
Clone the repo
git clone --depth 1 https://github.com/microsoft/sre-agent

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.

agentmods badge for rbac-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/sre-agent/rbac-audit.svg)](https://agentmods.dev/skills/microsoft/sre-agent/rbac-audit)
Your own site
<a href="https://agentmods.dev/skills/microsoft/sre-agent/rbac-audit"><img src="https://agentmods.dev/badge/skills/microsoft/sre-agent/rbac-audit.svg" alt="Measured on agentmods" height="20"></a>
Per session 100 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,865 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00100 $0.01865
Opus 5 $0.00050 $0.00932
Sonnet 5 $0.00020 $0.00373
Haiku 4.5 $0.00010 $0.00186

Measured 4d ago against content hash a31640482a8e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

rbac-audit 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 4d 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.

labs/zava-learning/sre-config/agent-config/skills/rbac-audit/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Zava Learning — RBAC / Least-Privilege & Access-Usage Audit

Resource Group: @@RG@@. Read-only audit — never create, modify, or remove a role assignment. This is a weekly governance review of who can do what here, and whether they actually use it. The goal is real least-privilege hygiene: surface over-privileged identities, direct (ungoverned) assignments, and standing access that has gone unused so a human can clean it up.

Identity naming policy (governance reports name their subjects)

The principals under audit (their display name / UPN / objectId and role) are the subject of this report — show them; an RBAC finding that hides the identity is useless. This is NOT the learner-PII the redaction standard protects. Still apply SearchMemory("zava-redaction") redact() to strip any secrets, tokens, credentials, or learner/customer PII that happen to appear, and never print secret values — but DO name the admins, service principals, and groups being audited.

Where the names come from (do NOT call Microsoft Graph): take the identity name from the principalName field that az role assignment list already returns, plus principalType. Do not run az ad user/group/sp list|show or az rest https://graph.microsoft.com/... to resolve names or look up guest/enabled status — the SRE Agent's managed identity has no Graph directory-read permission, so those calls fail with Insufficient privileges AND are gated as PendingAuthorization, which would stall this unattended weekly run. If a principalName is blank, identify that principal by its principalId (objectId) + principalType and note "display name unavailable (directory lookup not permitted)". A UPN containing #EXT# (when present in principalName) still indicates a guest.

1. Enumerate the real assignments effective on the RG

  • All assignments scoped at or above the RG (this includes subscription/management-group inheritance — most access here is inherited): az role assignment list --scope /subscriptions/<sub>/resourceGroups/@@RG@@ --include-inherited -o json.
  • For each: capture principalName, principalType (User / Group / ServicePrincipal), roleDefinitionName, scope, description, and createdOn where present. These fields are sufficient — everything you need to name and classify a principal is already in this output; no follow-up directory calls.

Read the full file on GitHub · 103 lines

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.

  1. 4d ago First seen · 103 lines · 100 tokens per session scan A a31640482a8e

Subscribe to this mod's changes

rbac-audit is a skill published in the GitHub repository microsoft/sre-agent (149 stars, last pushed 10d ago), licensed MIT. It adds 100 tokens to every session and 1,865 once invoked, about $0.0005 per session on Opus 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 2026-08-30.

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