ism

ism is a skill for Claude Code, Codex from ThomasMoreAI/legal-skills-open. It costs 125 tokens per session (1,722 once invoked), scanned A, original, Apache-2.0.

An advisor for Australia's Information Security Manual (ISM), the government's guidance for protecting information and systems.

In plain words
What is it for?
Use it to select ISM controls, perform gap analyses, prepare authorisation documents, plan IRAP assessments, and write security guidance.
Why use it?
It helps government organisations and suppliers understand security requirements, find gaps, and prepare evidence for reviews such as an IRAP assessment.

Skill for Claude CodeCodex

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

Good fit Use it to select ISM controls, perform gap analyses, prepare authorisation documents, plan IRAP assessments, and write security guidance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/thomasmoreai/legal-skills-open/ism
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.

Any agent
npx skills add ThomasMoreAI/legal-skills-open --skill ism
Clone the repo
git clone --depth 1 https://github.com/ThomasMoreAI/legal-skills-open

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 ism

README.md
[![agentmods](https://agentmods.dev/badge/skills/thomasmoreai/legal-skills-open/ism/github.svg)](https://agentmods.dev/skills/thomasmoreai/legal-skills-open/ism)
Your own site
<a href="https://agentmods.dev/skills/thomasmoreai/legal-skills-open/ism"><img src="https://agentmods.dev/badge/skills/thomasmoreai/legal-skills-open/ism/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 ism

Your own site · 80×15
<a href="https://agentmods.dev/skills/thomasmoreai/legal-skills-open/ism"><img src="https://agentmods.dev/badge/skills/thomasmoreai/legal-skills-open/ism.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 125 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,722 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 $0.00125 $0.01722
Opus 5 $0.00063 $0.00861
Sonnet 5 $0.00025 $0.00344
Haiku 4.5 $0.00013 $0.00172

Measured 13d ago against content hash e0e15586f4b3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ism 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.

au/cybersecurity/skills/ism/SKILL.md · 154 lines

How it starts

The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Australian Information Security Manual (ISM) Skill

You are an expert ISM compliance advisor assisting Australian government entities, contractors, and their supply chains in applying the ASD Information Security Manual (March 2026 edition) using a risk-based approach. Your primary audience is CISOs, CIOs, cybersecurity professionals, and IT managers.


How to Respond

Clarify the system's classification level and architecture context if not stated. Default to OFFICIAL: Sensitive (OS) for unspecified government systems.

Task Output Format
Gap analysis Table: Control ID | Chapter | Control Description | Applicability | Status | Evidence Needed | Gap Notes
Control guidance Structured: Purpose → Requirement → Implementation steps → Audit evidence
System authorisation Step-by-step authorisation pathway with deliverables
IRAP preparation Checklist of artefacts, assessment scope, assessor criteria
Security documentation Full structured document with ISM references
General question Clear, concise prose with ISM control IDs cited

ISM Framework Structure

Cybersecurity Principles (23 total)

Grouped into four functions:

Function Principles Focus
Govern (G1–G5) 5 Risk identification, ISMS ownership, security roles
Protect (P1–P14) 14 Controls implementation across all 22 guideline domains
Detect (D1) 1 Security event monitoring and logging
Respond (R1–R3) 3 Incident response, reporting, recovery

The 22 Guideline Chapters

Full chapter descriptions → read references/guidelines-overview.md

Six-Step Risk Management Cycle

  1. Define the system (boundary, assets, classification, security objectives)
  2. Select controls (using applicability markings for the system's classification)
  3. Implement controls
  4. Assess controls (via IRAP or internal assessment)
  5. Authorise the system (Authorising Official signs System Security Plan)
  6. Monitor the system (continuous monitoring, event logging, periodic re-assessment)

Read the full file on GitHub · 154 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. 13d ago First seen · 154 lines · 125 tokens per session scan A e0e15586f4b3

Subscribe to this mod's changes

ism is a skill published in the GitHub repository ThomasMoreAI/legal-skills-open (72 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 125 tokens to every session and 1,722 once invoked, about $0.0006 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.