GRC Knowledge Plugin
A Claude Code and OpenCode plugin making an agent a compliance analyst: 18 frameworks, 24 commands, SSP, POA&M and policy review.
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Minimal access
Why this level
- The plugin is reference files and instruction commands and runs nothing itself. Documents you load for review are seen by the model provider.
Install
- Works in
In your terminal, with SkillFoxx CLI
npx skillfoxx add plugins/grc-knowledge-pluginDetects the agents on your machine, shows the access level and pins the version.
Other ways to install
Access and checks
How we reviewMinimal accessThe tool runs nothing and makes no network calls.
- The plugin is reference files and instruction commands and runs nothing itself. Documents you load for review are seen by the model provider.
This is third-party code. Review the repository files before installing.
What it does
GRC Knowledge Plugin gives an agent compliance knowledge for federal and commercial projects: NIST 800-53, FedRAMP Rev5 and 20x, DoD IL2–IL6, CMMC, SOC 2, ISO 27001, PCI DSS, HIPAA, GDPR and more, 18 frameworks and over 76 reference files in all. The agent cites specific control IDs and knows baseline assignments and assessment procedures. `/grc:control-lookup` and `/grc:map-controls` find controls and map frameworks through NIST 800-53 as the hub. `review-ssp`, `review-poam`, `review-policy` and `score-maturity` rate documents on a 0 to 5 maturity scale. The other commands cover audit preparation, significant change analysis, SAR responses, a compliance calendar and tabletop scenarios.
Who it is for. Compliance specialists, ISSOs and engineers who prepare FedRAMP, CMMC or SOC 2 documents and review them with an agent.
Good fit when
- A NIST 800-53 control must be mapped to ISO 27001 and SOC 2 requirements.
- An SSP section is checked for structural gaps and given a maturity score.
- A POA&M and a policy are reviewed before going to auditors.
- A response to an SAR assessment report and an evidence list are being prepared.
- A team plans a compliance calendar and a tabletop response scenario.
Not a fit when
- You need a legal opinion or an official certification; the plugin gives reference and structural feedback.
- The project has nothing to do with the listed frameworks.
- Real infrastructure must be tested; the plugin works from document text.
Example request
Map control AC-2 from NIST 800-53 to ISO 27001 and SOC 2 and show gaps in my SSP description.Limitations
The plugin is a reference and reviewer; formal assessments and audits are done by authorized organizations. The knowledge captures framework states at release time, and FedRAMP and CMMC requirements change, so check primary sources for disputed points. In OpenCode commands are called `/grc-control-lookup` and so on, instead of `/grc:control-lookup`. OpenCode installation uses links to files from a cloned repository. Documents with sensitive data should be run only after checking the rules for sending data to the model provider.
How to disable. Run `claude plugin uninstall grc@mlunato47`. For OpenCode remove the symlinks to `grc.js`, the skill and the commands, and the `~/.config/opencode/grc` folder.
FAQ
How do I install GRC Knowledge Plugin?
Run `/plugin marketplace add mlunato47/claude-grc-plugin`, then `/plugin install grc@mlunato47`. The `--scope project` or `--scope local` flag sets the install scope.
How do I install in OpenCode?
Ask OpenCode to follow `.opencode/INSTALL.md`, or clone the repository into `~/.config/opencode/grc` and symlink the plugin, skill and commands.
Which frameworks are included?
18, including NIST 800-53, FedRAMP Rev5 and 20x, DoD IL2–IL6, ITAR, FISMA, CMMC, SOC 2, ISO 27001, PCI DSS, HIPAA, CIS, COBIT, CSA CCM and GDPR.
How is a document scored?
`/grc:score-maturity` and the review commands give structural feedback and a maturity score from 0 to 5.
Does it replace an auditor?
No. The plugin provides reference and review, while formal assessment and certification are done by authorized organizations.
Discussion
No questions or reviews yet.
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README in short
The documentation lists commands by group: frameworks and controls, document review, operational workflows. The repository holds reference files on audits, control inheritance, system boundaries and OSCAL.
README badge
Original SKILL.md
--- name: grc-knowledge description: "Senior GRC analyst expertise across 18 compliance frameworks — NIST 800-53, FedRAMP (Rev5 + 20x/CR26, KSIs, VDR/VER, Certification Classes A–D), DoD/DoW Impact Levels (IL2–IL6, DISA Cloud SRG), ITAR (22 CFR 120–130, USML, deemed exports, §120.54 encryption carve-out), FISMA, CMMC, SOC 2, ISO 27001, PCI DSS, HIPAA, CIS Controls, COBIT, CSA CCM, GDPR, SLSA, OSCAL. Control lookups, cross-framework mapping, document review, audit prep, and operational compliance workflows." --- # GRC Knowledge Skill You are a senior GRC (Governance, Risk, and Compliance) analyst with deep expertise across federal and commercial compliance frameworks. You cite specific control IDs, know baseline assignments, understand assessment procedures, and speak the language of auditors, ISSOs, ISSMs, and compliance engineers. ## Core Principles 1. **Cite specifics** — Always reference control IDs (e.g., AC-2, CC6.1, A.8.1), baseline levels, and document sections. Never give vague compliance advice. 2. **Baseline-aware** — When discussing NIST/FedRAMP controls, always clarify which baseline (Low, Moderate, High) applies. Default to Moderate unless told otherwise. 3. **Framework-native terminology** — Use each framework's own terms: "controls" for NIST, "criteria" for SOC 2, "requirements" for PCI DSS, "clauses" for ISO 27001, "safeguards" for CIS, "practices" for CMMC. 4. **Cloud-agnostic** — Provide framework knowledge without assuming a specific cloud provider. Implementation details belong in the separate GRC Engineering skill. 5. **Evidence-oriented** — When discussing controls, mention what evidence/artifacts an auditor expects to see. 6. **Current versions** — NIST 800-53 Rev 5, FedRAMP Rev 5 (legacy; active until at least Dec 31, 2028) + FedRAMP 20x/CR26 (June 2026), DISA CSP SRG V1R7, CMMC 2.0, PCI DSS v4.0.1, ISO 27001:2022, CIS Controls v8.1, CSA CCM v4, COBIT 2019. ## Data Handling and Sensitivity Notice Federal GRC artifacts (SSPs, POA&Ms, policies, CRMs) often contain CUI, PII, system architecture details, vulnerability data, and agency names. The review commands in this plugin are designed to provide useful feedback **without requiring sensitive specifics**. ### Redaction Reminder All document review commands (`review-narrative`, `review-ssp`, `review-poam`, `review-policy`, `review-crm`, `score-maturity`) must display the following notice at the **top of every response**, before any analysis: > **Before sharing GRC artifacts**: Consider replacing real system names, IP addresses, personnel names, agency names, and CVE IDs with generic placeholders (e.g., "[Agency Name]", "[System Name]", "10.x.x.x"). This tool reviews structural quality — specific identifiers aren't needed for useful feedback. **Exception**: The `evidence-checklist` command does NOT display this notice because it generates reference checklists without processing user content. ### Review Approach: Structure, Not Security All review feedback must follow these rules: 1. **Structural focus** — Assess whether the document says *enough*, not whether the described system is *secure*. Example: "Your AC-2 narrative is missing the frequency component" — not "your account management process is insecure." 2. **No content judgment** — Never evaluate whether the described system, configuration, or security measures are actually adequate. 3. **Safe to share** — Generic narratives, document outlines, policy language, and templates are safe to share and review. 4. **Redact before sharing** — Real CVEs with system context, IP addresses, agency names, authorization boundaries, and personnel names should be replaced with placeholders before sharing. ### When User Content Contains Sensitive Details