apsiii-score

apsiii-score is a skill for Claude Code, Codex from hannesill/m4. It costs 41 tokens per session (895 once invoked), scanned A, original, MIT.

Guidance for calculating APACHE III’s Acute Physiology Score, a measure of how seriously ill an intensive-care patient is during the first day.

In plain words
What is it for?
Use it for ICU mortality prediction, severity grouping, case-mix adjustment, research cohort matching, or comparing outcomes between intensive-care units.
Why use it?
It defines which worst vital signs and laboratory results to use when estimating illness severity and hospital mortality risk.

Skill for Claude CodeCodex

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

Good fit Use it for ICU mortality prediction, severity grouping, case-mix adjustment, research cohort matching, or comparing outcomes between intensive-care units.

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Install with agentmods
npx agentmods add skills/hannesill/m4/apsiii-score
View source ↗ hannesill/m4
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 hannesill/m4 --skill apsiii-score
Clone the repo
git clone --depth 1 https://github.com/hannesill/m4

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 apsiii-score

README.md
[![agentmods](https://agentmods.dev/badge/skills/hannesill/m4/apsiii-score.svg)](https://agentmods.dev/skills/hannesill/m4/apsiii-score)
Your own site
<a href="https://agentmods.dev/skills/hannesill/m4/apsiii-score"><img src="https://agentmods.dev/badge/skills/hannesill/m4/apsiii-score.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 895 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 $0.00041 $0.00895
Opus 5 $0.00020 $0.00447
Sonnet 5 $0.00008 $0.00179
Haiku 4.5 $0.00004 $0.00089

Measured 8d ago against content hash 8ecc5163915f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

apsiii-score 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 8d 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.

benchmark/tasks/apsiii/mimic-apsiii-24h-raw/skills/apsiii-score/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

APACHE III (APS III) Score Calculation

The Acute Physiology Score III (APS III) is the physiological component of APACHE III. It measures patient severity of illness on the first day of ICU stay and provides hospital mortality probability estimates.

M4Bench Use

In M4Bench, target concept tables listed in the task configuration are removed or unavailable in the agent database. Use this skill as procedural guidance and derive the requested output from available source or intermediate tables; do not rely on a precomputed target table or bundled SQL script.

When to Use This Skill

  • Hospital mortality prediction
  • Severity stratification and risk adjustment
  • Case-mix adjustment for benchmarking
  • Comparing outcomes across ICUs or time periods
  • Research cohort severity matching

Score Components

The APS III uses the worst values from the first 24 hours of ICU stay:

Vital Signs

  • Heart rate (normal reference: 75 bpm)
  • Mean blood pressure (normal reference: 90 mmHg)
  • Temperature (normal reference: 38C)
  • Respiratory rate (normal reference: 19 breaths/min)

Laboratory Values

  • Hematocrit (normal reference: 45.5%)
  • WBC (normal reference: 11.5 x10^9/L)
  • Creatinine (normal reference: 1.0 mg/dL)
  • BUN (scored from 0, higher is worse)
  • Sodium (normal reference: 145.5 mEq/L)
  • Albumin (normal reference: 3.5 g/dL)
  • Bilirubin (scored from 0, higher is worse)
  • Glucose (normal reference: 130 mg/dL)

Blood Gas

  • PaO2 (for non-ventilated patients with FiO2 < 50%)
  • A-aDO2 (for ventilated patients with FiO2 >= 50%)
  • pH and PaCO2 interaction scoring

Other

  • GCS (complex interaction between eye, verbal, motor components)
  • Urine output (24-hour total)
  • Mechanical ventilation status
  • Acute renal failure flag

Critical Implementation Notes

  1. Worst Value Definition: "Worst" means furthest from a predefined normal reference value, not simply min or max. For example:
    • Heart rate worst = MAX(|HR - 75|)
    • If equally distant from normal, use the higher score

Read the full file on GitHub · 86 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. 8d ago First seen · 86 lines · 41 tokens per session scan A 8ecc5163915f

Subscribe to this mod's changes

apsiii-score is a skill published in the GitHub repository hannesill/m4 (43 stars, last pushed 1mo ago), licensed MIT. It adds 41 tokens to every session and 895 once invoked, about $0.0002 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.

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