boundary-guidance

boundary-guidance is a command for Claude Code from mlunato47/claude-grc-plugin. It costs 4 tokens per session (1,143 once invoked), scanned A, original, MIT.

Guidance for defining an authorization boundary: the systems, services, people, and connections included in a security assessment.

In plain words
What is it for?
Use it to plan boundaries for FedRAMP, NIST, or FISMA systems using cloud models such as IaaS, PaaS, or SaaS.
Why use it?
A clear boundary shows what is covered by the assessment and how outside or shared services relate to it.

Command for Claude Code

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

Part of the grc plugin — 1 skill, 24 commands shipped together

Good fit Use it to plan boundaries for FedRAMP, NIST, or FISMA systems using cloud models such as IaaS, PaaS, or SaaS.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/mlunato47/claude-grc-plugin/boundary-guidance
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/mlunato47/claude-grc-plugin

Made for: Claude Code.

Or install grc, the plugin that ships this one along with the rest of its 1 skill, 24 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 boundary-guidance

README.md
[![agentmods](https://agentmods.dev/badge/commands/mlunato47/claude-grc-plugin/boundary-guidance/github.svg)](https://agentmods.dev/commands/mlunato47/claude-grc-plugin/boundary-guidance)
Your own site
<a href="https://agentmods.dev/commands/mlunato47/claude-grc-plugin/boundary-guidance"><img src="https://agentmods.dev/badge/commands/mlunato47/claude-grc-plugin/boundary-guidance/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 boundary-guidance

Your own site · 80×15
<a href="https://agentmods.dev/commands/mlunato47/claude-grc-plugin/boundary-guidance"><img src="https://agentmods.dev/badge/commands/mlunato47/claude-grc-plugin/boundary-guidance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 4 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,143 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 $0.00004 $0.01143
Opus 5 $0.00002 $0.00571
Sonnet 5 $0.00001 $0.00229
Haiku 4.5 $0.00000 $0.00114

Measured 9d ago against content hash 1413955f8d4e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

boundary-guidance 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 9d 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

Copies of this mod

1 near-identical copy found in the catalogue:

grc/commands/boundary-guidance.md · 151 lines

How it starts

The opening of the file, as written. The whole thing — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/grc:boundary-guidance

Provide guidance on authorization boundary definition based on system architecture.

Usage

/grc:boundary-guidance [framework?] [service-model?]

The user can optionally describe their architecture for tailored guidance.

Arguments

  • framework (optional): fedramp, nist, fisma. Defaults to fedramp.
  • service-model (optional): iaas, paas, saas. Helps tailor boundary patterns.

Examples

/grc:boundary-guidance fedramp saas
/grc:boundary-guidance fedramp iaas
/grc:boundary-guidance fedramp
/grc:boundary-guidance We have a SaaS app on AWS with RDS, ECS, S3, CloudFront, and a VPN connection to an agency

Behavior

When invoked:

  1. Display the Data Sensitivity Notice if the user describes their specific architecture (see SKILL.md Data Handling section). If only a generic service model is specified, the notice is not needed.

  2. Read the appropriate reference files:

    • skills/grc-knowledge/audits/boundary-guidance.md for boundary patterns, common mistakes, and diagram requirements
    • skills/grc-knowledge/audits/control-inheritance.md for inheritance context
    • Framework file if framework-specific requirements apply
  3. If the user describes their architecture, provide tailored guidance:

    a. Boundary Recommendation

    • Which components should be inside the boundary
    • Which components should be outside (with interconnection documentation)
    • Gray areas that need a decision, with pros/cons of each option

    b. Diagram Requirements

    • What the authorization boundary diagram must show
    • What the network architecture diagram must show
    • What the data flow diagram must show

    c. Interconnection Inventory

    • External connections that cross the boundary
    • What each interconnection needs (ISA, ports/protocols, security measures)

    d. Common Mistakes for This Architecture

    • Specific boundary mistakes relevant to the described architecture
    • How the 3PAO is likely to challenge the boundary

Read the full file on GitHub · 151 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. 9d ago First seen · 151 lines · 4 tokens per session scan A 1413955f8d4e

Subscribe to this mod's changes

boundary-guidance is a command published in the GitHub repository mlunato47/claude-grc-plugin (181 stars, last pushed 1mo ago), licensed MIT. It adds 4 tokens to every session and 1,143 once invoked, about $0.0000 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.