ppmi-skill

ppmi-skill is a skill for Claude Code, Codex from CUHK-AIM-Group/NeuroClaw. It costs 102 tokens per session (2,349 once invoked), scanned A, original, MIT.

A guided workflow for the Parkinson’s Progression Markers Initiative, a research dataset tracking brain and clinical measures related to Parkinson’s disease. It covers structural, resting-state functional, and diffusion MRI.

In plain words
What is it for?
Use it to validate PPMI data in BIDS format, process its MRI modalities, extract participant traits, and integrate quality-control results.
Why use it?
It organizes the dataset’s processing steps and quality checks so results are produced in a consistent structure.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it to validate PPMI data in BIDS format, process its MRI modalities, extract participant traits, and integrate quality-control results.

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Install with agentmods
npx agentmods add skills/cuhk-aim-group/neuroclaw/ppmi-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 ppmi-skill
Clone the repo
git clone --depth 1 https://github.com/CUHK-AIM-Group/NeuroClaw

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 ppmi-skill

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/cuhk-aim-group/neuroclaw/ppmi-skill"><img src="https://agentmods.dev/badge/skills/cuhk-aim-group/neuroclaw/ppmi-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,349 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 pass 7 Sept 2026
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 $0.00102 $0.02349
Opus 5 $0.00051 $0.01175
Sonnet 5 $0.00020 $0.00470
Haiku 4.5 $0.00010 $0.00235

Measured 9d ago against content hash a255bfcbd080, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ppmi-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.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/extract_ppmi_phenotype.py, scripts/ppmi_qc_summary.py, scripts/validate_ppmi.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/ppmi-skill/SKILL.md · 223 lines

How it starts

The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PPMI Skill (Dataset-Orchestration Layer)

Overview

ppmi-skill is the NeuroClaw orchestration skill for the Parkinson's Progression Markers Initiative (PPMI) dataset, launched by The Michael J. Fox Foundation.

It strictly follows the NeuroClaw hierarchical design principles:

  • This skill only describes WHAT needs to be done and which tool skill to delegate to.
  • It contains no implementation code or concrete commands.
  • All concrete execution is delegated to existing base/tool skills via claw-shell.
  • Companion scripts in scripts/ provide reference implementations for BIDS validation, phenotype extraction, and QC.

Core workflow (never bypassed):

  1. Identify input PPMI data and target modalities.
  2. Generate a numbered execution plan clearly stating WHAT needs to be done and which tool skill will handle each step.
  3. Present the full plan, estimated runtime, resource requirements, and risks to the user and wait for explicit confirmation ("YES" / "execute" / "proceed").
  4. On confirmation, delegate every step to the appropriate skill via claw-shell.
  5. After execution, save all outputs in a clean directory structure (ppmi_output/).

Research use only.


Quick Reference

Task What needs to be done Delegate to Expected output
Data access Accept the PPMI DUA and submit the IDA application Manual access gate Approved PPMI project access
BIDS validation Validate PPMI BIDS structure scripts/validate_ppmi.py Validation report
sMRI processing Brain extraction, tissue segmentation smri-skill smri_output/ derivatives
rs-fMRI processing Preprocessing, denoising, connectivity fmri-skill fmri_output/ connectivity
dMRI processing Diffusion preprocessing, tensor metrics dwi-skill dwi_output/ metrics
Phenotype extraction Motor scores, cognitive, biomarkers scripts/extract_ppmi_phenotype.py Merged phenotype CSV
QC summary Per-subject quality control scripts/ppmi_qc_summary.py QC summary + exclusion list

Read the full file on GitHub · 223 lines

Files

What ships with it

3 files 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 · 223 lines · 102 tokens per session scan A a255bfcbd080

Subscribe to this mod's changes

ppmi-skill is a skill published in the GitHub repository CUHK-AIM-Group/NeuroClaw (85 stars, last pushed 6d ago), licensed MIT. It adds 102 tokens to every session and 2,349 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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