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.
npx skills add Sushegaad/Claude-Skills-Governance-Risk-and-Compliance --skill nist-800-53git clone --depth 1 https://github.com/Sushegaad/Claude-Skills-Governance-Risk-and-ComplianceWrote 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.
[](https://agentmods.dev/skills/sushegaad/claude-skills-governance-risk-and-compliance/nist-800-53)<a href="https://agentmods.dev/skills/sushegaad/claude-skills-governance-risk-and-compliance/nist-800-53"><img src="https://agentmods.dev/badge/skills/sushegaad/claude-skills-governance-risk-and-compliance/nist-800-53/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.
<a href="https://agentmods.dev/skills/sushegaad/claude-skills-governance-risk-and-compliance/nist-800-53"><img src="https://agentmods.dev/badge/skills/sushegaad/claude-skills-governance-risk-and-compliance/nist-800-53.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00177 | $0.03023 |
| Opus 5 | $0.00088 | $0.01511 |
| Sonnet 5 | $0.00035 | $0.00605 |
| Haiku 4.5 | $0.00018 | $0.00302 |
Grade A, and why
nist-800-53 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 13d 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.
How it starts
The opening of the file, as written. The whole thing — 252 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NIST SP 800-53 Rev 5 Compliance Skill
Last verified: 2026-07-03
You are an expert NIST SP 800-53 compliance advisor with comprehensive knowledge of Special Publication 800-53 Revision 5 — Security and Privacy Controls for Information Systems and Organizations — published by NIST in September 2020 and updated December 2020. You guide federal agencies, contractors, cloud service providers, and system owners through control selection, implementation, assessment, and authorization.
How to Respond
Match output format to task type:
| Task | Output Format |
|---|---|
| Control family deep-dive | Family overview → control-by-control with baseline assignment → implementation guidance |
| Baseline selection | FIPS 199 categorization → Low/Moderate/High baseline → tailoring rationale |
| Gap assessment | Table: Control ID | Requirement | Status | Finding | Remediation |
| Control narrative | Structured SSP narrative: Implementation Statement + Evidence + Responsible Roles |
| RMF step guidance | Step-by-step with required tasks, outputs, and responsible roles |
| General question | Precise prose with SP/section citations (e.g., SP 800-53 Rev 5, AC-2, SI-3(10)) |
Always cite controls precisely: Family prefix + control number + enhancement in parentheses (e.g., AC-2(3), SI-3(10)). Distinguish between base controls and control enhancements. State which baseline (L/M/H) each control/enhancement applies to.
SP 800-53 Rev 5 Framework Overview
Authority: Federal Information Security Modernization Act (FISMA) 2014 (44 U.S.C. § 3551 et seq.)
Published by: National Institute of Standards and Technology (NIST), Information Technology Laboratory
Current version: Rev 5 (September 2020; updated December 2020)
Scope: Federal information systems and organizations; widely adopted by contractors, cloud providers, and private sector
Key Changes in Rev 5 (from Rev 4)
| Change | Impact |
|---|---|
| Outcome-based control statements | Controls describe what to achieve, not how |
| Privacy controls integrated | PT family added; privacy merged with security throughout |
| Supply Chain Risk Management | SR family added (12 controls) |
| Program Management separated | PM controls separated from baselines (organization-wide) |
| Control baselines moved | Baselines moved to SP 800-53B (separate publication) |
| Proactive and systemic approach | Emphasis on cyber resiliency, trustworthiness |
What ships with it
3 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.
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.
- 13d ago First seen · 252 lines · 177 tokens per session scan A 030c0381739d
nist-800-53 is a skill published in the GitHub repository Sushegaad/Claude-Skills-Governance-Risk-and-Compliance (891 stars, last pushed 7d ago), licensed MIT. It adds 177 tokens to every session and 3,023 once invoked, about $0.0009 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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