oasis-score

oasis-score is a skill for Claude Code, Codex from hannesill/m4. It costs 41 tokens per session (2,136 once invoked), scanned A, original, MIT.

A method for calculating the Oxford Acute Severity of Illness Score (OASIS), an ICU severity score that uses 10 measurements and does not require laboratory results.

In plain words
What is it for?
Use it for mortality prediction, rapid ICU assessment, real-time scoring, or comparison with APACHE and SAPS scores.
Why use it?
It provides a quick way to assess illness severity when lab data is missing or delayed.

Skill for Claude CodeCodex

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

Good fit Use it for mortality prediction, rapid ICU assessment, real-time scoring, or comparison with APACHE and SAPS scores.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hannesill/m4/oasis-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 oasis-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 oasis-score

README.md
[![agentmods](https://agentmods.dev/badge/skills/hannesill/m4/oasis-score.svg)](https://agentmods.dev/skills/hannesill/m4/oasis-score)
Your own site
<a href="https://agentmods.dev/skills/hannesill/m4/oasis-score"><img src="https://agentmods.dev/badge/skills/hannesill/m4/oasis-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 2,136 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 $0.02136
Opus 5 $0.00020 $0.01068
Sonnet 5 $0.00008 $0.00427
Haiku 4.5 $0.00004 $0.00214

Measured 8d ago against content hash 7668cffad18a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

oasis-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/oasis/eicu-oasis/skills/oasis-score/SKILL.md · 219 lines

How it starts

The opening of the file, as written. The whole thing — 219 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OASIS Score Calculation

The Oxford Acute Severity of Illness Score (OASIS) is a parsimonious severity score that achieves comparable predictive accuracy to APACHE using fewer variables. It does not require laboratory values, making it useful when lab data is missing.

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

  • Mortality prediction when lab data is incomplete
  • Quick severity assessment with minimal variables
  • Real-time severity scoring (no lab turnaround time)
  • Research requiring a validated, simple severity metric
  • Comparison with APACHE/SAPS scores

Score Components (First 24 Hours)

OASIS sums 10 component scores. The cutoffs below are aligned with the M4Bench/eICU labels, which follow the eICU implementation adapted from Johnson AEW et al. (Crit Care Med 2013, Table 2). For min/max-bound continuous variables, use the eICU evaluation order shown below because first-match ordering affects component labels when both low and high extremes occur in the first 24 h.

Pre-ICU Length of Stay

Range (hours) In minutes Score
< 0.17 < 10.2 5
0.17 – 4.94 10.2 – 296.4 3
4.95 – 24.00 297.0 – 1440.0 0
24.01 – 311.80 1440.6 – 18708.0 2
> 311.80 > 18708 1

Age (years)

Range Score
< 24 0
24 – 53 3
54 – 77 6
78 – 89 9
≥ 90 7

Glasgow Coma Score (worst observation)

Range Score
3 – 7 10
8 – 13 4
14 3
15 0

Heart Rate (min^-1)

Evaluation order Bin Score
1 min < 33 4
2 max 33-88 0
3 max 89-106 1
4 max 107-125 3
5 max > 125 6

Mean Arterial Pressure (mmHg)

Read the full file on GitHub · 219 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 · 219 lines · 41 tokens per session scan A 7668cffad18a

Subscribe to this mod's changes

oasis-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 2,136 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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