scan-skill

scan-skill is a skill for Codex from CUHK-AIM-Group/NeuroClaw. It costs 91 tokens per session (1,219 once invoked), scanned A, original, MIT.

A guided workflow for the SCAN cohort, a research collection combining MRI and PET brain scans with clinical and cognitive data from Alzheimer’s Disease Research Centers. It covers approved data handling, organisation, linking, and analysis preparation.

In plain words
What is it for?
It helps prepare approved SCAN exports, organise DICOM or NIfTI scans into BIDS format, link imaging with participant information, and process MRI or PET data.
Why use it?
It makes access rules, identifiers, file staging, and connections between imaging and clinical data explicit before processing begins.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: mentions subagents.

Good fit It helps prepare approved SCAN exports, organise DICOM or NIfTI scans into BIDS format, link imaging with participant information, and process MRI or PET data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cuhk-aim-group/neuroclaw/scan-skill
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 CUHK-AIM-Group/NeuroClaw --skill scan-skill
Clone the repo
git clone --depth 1 https://github.com/CUHK-AIM-Group/NeuroClaw

Made for: 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 scan-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/cuhk-aim-group/neuroclaw/scan-skill/github.svg)](https://agentmods.dev/skills/cuhk-aim-group/neuroclaw/scan-skill)
Your own site
<a href="https://agentmods.dev/skills/cuhk-aim-group/neuroclaw/scan-skill"><img src="https://agentmods.dev/badge/skills/cuhk-aim-group/neuroclaw/scan-skill/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 scan-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/cuhk-aim-group/neuroclaw/scan-skill"><img src="https://agentmods.dev/badge/skills/cuhk-aim-group/neuroclaw/scan-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,219 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 33
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00091 $0.01219
Opus 5 $0.00046 $0.00609
Sonnet 5 $0.00018 $0.00244
Haiku 4.5 $0.00009 $0.00122

Measured 9d ago against content hash 2e9a2625bc13, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

scan-skill 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.

skills/scan-skill/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SCAN Skill (Dataset-Orchestration Layer)

Overview

Use this skill to turn an approved SCAN export into an auditable multimodal workflow. Keep access control, identifier handling, staging, phenotype linkage, and modality processing explicit.

SCAN means Standardized Centralized Alzheimer's and Related Dementias Neuroimaging. It combines standardized MRI and PET from Alzheimer's Disease Research Centers with longitudinal NACC clinical and cognitive data.

Research use only.

Access gate

  • Request SCAN data through the NACC Quick Access File system.
  • Access is free but is not anonymous: NACC records a project proposal and approves the request.
  • Defaced images, QC fields, imaging summaries, and analysis variables are available through the request system. Availability varies because images must complete defacing and QC before release.
  • Do not automate account creation, approval, or authenticated scraping. Begin execution only after the user has placed an approved export on local storage.
  • Never ask the user to paste credentials into commands, logs, chat, or repository files.

Intake contract

Before processing, identify:

  • approved request or release identifier
  • export root and whether images are DICOM, NIfTI, or already BIDS-like
  • requested modalities and subject/session subset
  • NACC clinical/UDS tables supplied with the export
  • available stable identifiers and visit/date fields
  • local storage, compute, and DUA restrictions

Do not assume every participant has every optional sequence. Build modality availability from the files and QC tables, not from cohort-level descriptions.

Quick reference

Task Delegate to Output
Inventory approved export claw-shell immutable file and checksum manifest
Convert approved DICOM dcm2nii NIfTI, JSON, bval, and bvec files
Stage or validate BIDS bids-organizer BIDS dataset plus validation report
T1w, T2w, or FLAIR processing smri-skill structural derivatives and QC
Resting/task fMRI processing fmri-skill functional derivatives and QC
dMRI processing dwi-skill diffusion derivatives and QC
ASL/perfusion processing asl-skill perfusion derivatives and QC
Amyloid, tau, or FDG PET processing pet-skill PET derivatives, SUVRs, and QC
Join NACC phenotype tables claw-shell with structured tabular tools keyed analysis table and join audit

Read the full file on GitHub · 115 lines

Files

What ships with it

1 file 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.

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 · 115 lines · 91 tokens per session scan A 2e9a2625bc13

Subscribe to this mod's changes

scan-skill is a skill published in the GitHub repository CUHK-AIM-Group/NeuroClaw (85 stars, last pushed 6d ago), licensed MIT. It adds 91 tokens to every session and 1,219 once invoked, about $0.0005 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 2026-09-03.

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