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Parsifal-M
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opa-permissions-wrapper-setup

Integrate OpenAPI-derived Backstage permission checks with Open Policy Agent Rego policies.

65|10|Updated Feb 25, 2023
Search Tags:#authorization#permissions#rbac#policy#opa#rego#backstage
One-click install
npx skills add https://github.com/Parsifal-M/backstage-opa-plugins --skill opa-permissions-wrapper-setup
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: opa-permissions-wrapper-setup
Source: https://github.com/Parsifal-M/backstage-opa-plugins/tree/main/.claude/skills/opa-permissions-wrapper-setup
Command: npx skills add https://github.com/Parsifal-M/backstage-opa-plugins --skill opa-permissions-wrapper-setup

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps teams integrate Open Policy Agent (OPA) with the Backstage Permission Framework so permission checks are evaluated by external Rego policies rather than hard-coded logic, enabling centralized, dynamic, and fine-grained access control across Backstage plugins.

Core Features & Use Cases

  • Module wiring: Install and register @parsifal-m/plugin-permission-backend-module-opa-wrapper in the Backstage backend to delegate permission evaluation to OPA.
  • Configuration: Configure permission.opa.baseUrl and policyEntryPoint in app-config.yaml to point to an OPA server and a Rego decision rule.
  • Policy authoring & filtering: Author Rego policies that return ALLOW, DENY, or CONDITIONAL results to implement RBAC/ABAC rules and resource-level filtering for catalog, scaffolder, and other plugins.
  • Testing & debugging: Validate policies with opa eval, enable debug logging for live inputs, and write unit or integration tests for policy behaviour and OPA client calls.

Quick Start

Add @parsifal-m/plugin-permission-backend-module-opa-wrapper to your backend, set permission.opa.baseUrl to your OPA URL and permission.opa.policy.policyEntryPoint to your Rego rule in app-config.yaml, and place your .rego file under a policies/ directory.

Frequently Asked Questions about opa-permissions-wrapper-setup

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I use OPA for Backstage permission checks instead of hard-coded logic?▼

To configure OPA permissions in Backstage, set permission.opa.baseUrl to your OPA server URL and permission.opa.policy.policyEntryPoint to your Rego rule in app-config.yaml, then place .rego files under a policies/ directory.

How do I write Rego policies for Backstage catalog and scaffolder plugins?▼

Write Rego policies for Backstage plugins by providing inputs with identity and permission payloads that return ALLOW, DENY, or CONDITIONAL results. This implements RBAC or ABAC rules and resource-level filtering for catalog and scaffolder plugins.

What does a CONDITIONAL response mean for Backstage OPA permission evaluation?▼

A CONDITIONAL response in Backstage OPA permission evaluation enables resource-level filtering by returning specific criteria rather than a simple allow or deny. Rego policies use this to apply fine-grained access control across Backstage plugins.

Can I use Open Policy Agent with the Backstage Permission Framework for RBAC?▼

Yes, you can use Open Policy Agent with the Backstage Permission Framework for RBAC by registering the OPA wrapper backend module. External Rego policies evaluate permission requests dynamically to enforce role-based access control.

Why are my Backstage OPA permission checks returning DENY unexpectedly?▼

Backstage OPA permission checks may return DENY unexpectedly if the Rego policyEntryPoint is misconfigured in app-config.yaml or the identity and permission payloads are malformed. Enable debug logging for live inputs and validate policies using opa eval to troubleshoot.

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