nist-compliance

nist-compliance is a skill for Claude Code, Codex from williamzujkowski/standards. It costs 26 tokens per session (4,474 once invoked), scanned A, original, MIT.

A guide to NIST 800-53 revision 5, a catalogue of security controls used to manage and audit information systems.

In plain words
What is it for?
Use it to tag code with controls, track implementation, collect evidence, and include compliance checks in continuous integration and delivery.
Why use it?
It helps connect code and tests to required controls and collect evidence for security audits instead of documenting compliance manually.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python scripts/validate-nist-tags.py.

Good fit Use it to tag code with controls, track implementation, collect evidence, and include compliance checks in continuous integration and delivery.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/williamzujkowski/standards
agentmods
npx agentmods add skills/williamzujkowski/standards/nist-compliance

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 nist-compliance

README.md
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agentmods 80×15 button for nist-compliance

Your own site · 80×15
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Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,474 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00026 $0.04474
Opus 5.5 $0.00010 $0.01790
Sonnet 5.5 $0.00005 $0.00895
Haiku 4.5 $0.00003 $0.00447

Measured yesterday against content hash d6a3724262ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-30, from the pricing page.

Security

Grade A, and why

nist-compliance 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 yesterday.

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.

skills/nist-compliance/SKILL.md · 702 lines

How it starts

The opening of the file, as written. The whole thing — 702 lines — stays where its author put it; the contents beside it link to each section on GitHub.

NIST Compliance Skill

Level 1: Quick Start (5 minutes)

What You'll Learn

Tag code with NIST 800-53r5 controls, track compliance, and generate evidence for security audits.

Core Principles

  • Traceability: Link code to security controls
  • Evidence: Automate compliance documentation
  • Continuous Compliance: Integrate into CI/CD
  • Defense in Depth: Multiple control layers

Quick Start Tagging

/**
 * @nist ia-2 "User authentication"
 * @nist ia-5 "Authenticator management"
 * @evidence code, test
 */
export async function authenticateUser(credentials: Credentials) {
  // @nist ia-5.1 "Password complexity validation"
  validatePasswordComplexity(credentials.password);

  // @nist au-2 "Audit authentication events"
  await auditLog.record("auth.attempt", {
    user: credentials.username,
    timestamp: new Date(),
  });

  return authService.verify(credentials);
}
# @nist ac-3 "Access enforcement"
# @nist ac-6 "Least privilege"
def check_permissions(user, resource, action):
    """
    @nist-implements ac-3.a "Enforce approved authorizations"
    @evidence test, documentation
    """
    if not user.has_permission(resource, action):
        audit_access_denial(user, resource, action)  # @nist au-2
        raise PermissionDenied()
# @nist-controls: [sc-8, sc-13, ac-12]
security:
  tls:
    version: "1.3" # @nist sc-8 "Transmission confidentiality"
    ciphers: ["TLS_AES_256_GCM_SHA384"] # @nist sc-13
  session:
    timeout: 1800 # @nist ac-12 "Session termination (30 min)"

Essential Checklist

  • Install pre-commit hooks for NIST validation
  • Tag authentication code (IA family)
  • Tag access control (AC family)
  • Tag audit logging (AU family)
  • Generate initial compliance report

Common Control Families

Family Code Examples
Access Control AC AC-2 (accounts), AC-3 (enforcement), AC-6 (least privilege)
Identification & Auth IA IA-2 (user auth), IA-5 (authenticators), IA-8 (identification)
Audit & Accountability AU AU-2 (events), AU-3 (content), AU-6 (review)
System & Communications SC SC-8 (confidentiality), SC-13 (crypto), SC-28 (data at rest)
System & Information Integrity SI SI-10 (input validation), SI-11 (error handling)

Read the full file on GitHub · 702 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. yesterday First seen · 702 lines · 26 tokens per session scan A d6a3724262ca

Subscribe to this mod's changes

nist-compliance is a skill published in the GitHub repository williamzujkowski/standards (18 stars, last pushed 1mo ago), licensed MIT. It adds 26 tokens to every session and 4,474 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-29.

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