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Add role-mining dataset quality evidence gates #1943

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Add role-mining dataset quality evidence gates #1943

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19 changes: 18 additions & 1 deletion skills/identity/rbac-design/SKILL.md
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Expand Up @@ -12,7 +12,7 @@ phase: [design]
frameworks: [NIST-RBAC, NIST-SP-800-162]
difficulty: intermediate
time_estimate: "45-90min"
version: "1.0.0"
version: "1.0.1"
author: unitoneai
license: MIT
allowed-tools: Read, Grep, Glob
Expand Down Expand Up @@ -303,6 +303,15 @@ RBAC-ABAC-08: Obligations (logging, notification) not enforced by PEP

### Step 6: Role Mining and Rationalization


Require dataset quality evidence before promoting role-mining output into the target RBAC model. Mining stale, incomplete, or biased entitlements can encode privilege creep as new roles.

| Dataset Source | Extraction Date | Observation Window | Population Coverage | Entitlement Normalization | Exclusions / Separations | Permission-Use Evidence | Owner Validation | Mining Confidence |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| `[IAM, directory, app export]` | `[date]` | `[window]` | `[users, groups, apps, gaps]` | `[direct, inherited, nested, JIT, temporary]` | `[dormant, break-glass, service, contractor, test]` | `[last-used or usage logs]` | `[business/resource owner]` | `High / Medium / Low / Not Evaluable` |

Mark `Not Evaluable` when the dataset window, entitlement expansion, account filtering, permission-use evidence, or owner validation is missing.

**Objective:** Derive optimal roles from existing access patterns and reduce role sprawl.

#### Role Mining Process
Expand Down Expand Up @@ -389,6 +398,12 @@ RBAC-MINE-06: Mining does not account for SoD constraints (mined roles may creat
- ABAC Policies (Step 5): [count]
- Role Mining (Step 6): [count]

#### Role-Mining Dataset Quality Evidence

| Source | Extraction Date | Window | Coverage | Normalization | Exclusions | Usage Evidence | Owner Validation | Confidence |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| `[source]` | `[date]` | `[window]` | `[coverage]` | `[normalization]` | `[excluded]` | `[usage]` | `[owner]` | `High / Medium / Low / Not Evaluable` |

### Detailed Findings
[Findings table]

Expand Down Expand Up @@ -427,6 +442,8 @@ RBAC-MINE-06: Mining does not account for SoD constraints (mined roles may creat

---

- Promoting role-mining clusters into target roles before proving dataset freshness, entitlement normalization, account filtering, usage evidence, and owner signoff.

## Common Pitfalls

1. **Designing roles around people, not functions** — roles should reflect job functions that outlast individual employees. Person-specific roles cause explosion.
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