rev5-transition

rev5-transition is a command for Claude Code from nathanimphilipos/synergos-grc. It costs 15 tokens per session (1,361 once invoked), scanned A, a copy of rev5-transition, MIT.

A reference command for moving from NIST SP 800-53 Revision 4 to Revision 5, two versions of a US government security-control framework.

In plain words
What is it for?
Use it to compare controls, find added or withdrawn controls, review baseline changes, perform gap analysis, and create a transition checklist.
Why use it?
It shows how controls, control families, and security baselines changed, reducing the manual work needed to plan the transition.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the grc plugin — 1 skill, 27 commands shipped together

Good fit Use it to compare controls, find added or withdrawn controls, review baseline changes, perform gap analysis, and create a transition checklist.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/nathanimphilipos/synergos-grc/rev5-transition
Install

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.

Clone the repo
git clone --depth 1 https://github.com/nathanimphilipos/synergos-grc

Made for: Claude Code.

Or install grc, the plugin that ships this one along with the rest of its 1 skill, 27 commands.

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 rev5-transition

README.md
[![agentmods](https://agentmods.dev/badge/commands/nathanimphilipos/synergos-grc/rev5-transition/github.svg)](https://agentmods.dev/commands/nathanimphilipos/synergos-grc/rev5-transition)
Your own site
<a href="https://agentmods.dev/commands/nathanimphilipos/synergos-grc/rev5-transition"><img src="https://agentmods.dev/badge/commands/nathanimphilipos/synergos-grc/rev5-transition/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.

agentmods 80×15 button for rev5-transition

Your own site · 80×15
<a href="https://agentmods.dev/commands/nathanimphilipos/synergos-grc/rev5-transition"><img src="https://agentmods.dev/badge/commands/nathanimphilipos/synergos-grc/rev5-transition.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,361 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 100% copy Near-identical to another mod 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 $0.00015 $0.01361
Opus 5 $0.00008 $0.00681
Sonnet 5 $0.00003 $0.00272
Haiku 4.5 $0.00002 $0.00136

Measured 12d ago against content hash a85e254061eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

rev5-transition 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 12d 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.

Origin

This is a copy

100% identical to rev5-transition — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

grc/commands/rev5-transition.md · 170 lines

How it starts

The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/grc:rev5-transition

Provide NIST 800-53 Rev 4 to Rev 5 transition guidance — control mapping, gap analysis, and migration steps.

Usage

/grc:rev5-transition [action] [control-or-family?]

Arguments

  • action: What to do. Accepts:

    • lookup (default): Look up what changed for a specific Rev 4 control in Rev 5
    • gaps: Show new controls added in Rev 5 that need implementation
    • withdrawn: Show controls withdrawn in Rev 5 and where they went
    • baseline-changes: Show what was added/removed from baselines between revisions
    • checklist: Full transition checklist with steps and sequence
  • control-or-family (optional): A Rev 4 control ID (e.g., ac-2, sa-12) or family (e.g., ac, sa) to look up

Examples

/grc:rev5-transition lookup sa-12
/grc:rev5-transition lookup ac-2
/grc:rev5-transition gaps
/grc:rev5-transition gaps sr
/grc:rev5-transition withdrawn
/grc:rev5-transition baseline-changes moderate
/grc:rev5-transition checklist

Behavior

When invoked:

  1. No redaction reminder needed — this is a pure reference command comparing framework revisions. No user content is processed.

  2. Read the appropriate reference files:

    • skills/grc-knowledge/frameworks/nist-rev4-to-rev5.md for the transition mapping
    • skills/grc-knowledge/frameworks/nist-800-53.md for Rev 5 control details
    • skills/grc-knowledge/frameworks/fedramp.md for FedRAMP-specific transition context
  3. For lookup action: Given a Rev 4 control or family:

    • Show what changed between Rev 4 and Rev 5
    • If the control was withdrawn, show where the requirements moved
    • If the control was modified, highlight the key differences
    • If new enhancements were added, list them
    • Provide migration action for the SSP narrative
  4. For gaps action: Show all controls that are new in Rev 5 (didn't exist in Rev 4):

    • New PT family controls
    • New SR family controls
    • New controls added to existing families
    • For each: baseline assignment, brief description, implementation effort estimate

Read the full file on GitHub · 170 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. 12d ago First seen · 170 lines · 15 tokens per session scan A a85e254061eb

Subscribe to this mod's changes

rev5-transition is a command published in the GitHub repository nathanimphilipos/synergos-grc (5 stars, last pushed 6mo ago), licensed MIT. It adds 15 tokens to every session and 1,361 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to rev5-transition, differing in 0 lines, and is treated as a copy.