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.
npx skills add hannesill/m4 --skill comorbidity-scoregit clone --depth 1 https://github.com/hannesill/m4Wrote 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.
[](https://agentmods.dev/skills/hannesill/m4/comorbidity-score)<a href="https://agentmods.dev/skills/hannesill/m4/comorbidity-score"><img src="https://agentmods.dev/badge/skills/hannesill/m4/comorbidity-score/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.
<a href="https://agentmods.dev/skills/hannesill/m4/comorbidity-score"><img src="https://agentmods.dev/badge/skills/hannesill/m4/comorbidity-score.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00051 | $0.01695 |
| Opus 5 | $0.00026 | $0.00847 |
| Sonnet 5 | $0.00010 | $0.00339 |
| Haiku 4.5 | $0.00005 | $0.00169 |
Grade A, and why
comorbidity-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 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.
How it starts
The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Comorbidity Scores
Two validated comorbidity indices for risk adjustment: Charlson Comorbidity Index (CCI) and Elixhauser Comorbidity Index. Both are most commonly implemented using Quan 2005 ICD-9/ICD-10 coding algorithms, though other mapping algorithms exist.
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
- Risk adjustment in outcome studies
- Mortality prediction models
- Case-mix comparison across cohorts
- Matching/stratification by comorbidity burden
- Resource utilization analysis
Index Comparison
| Aspect | Charlson | Elixhauser |
|---|---|---|
| Categories | 17 conditions | 31 conditions |
| Output | Weighted score (0-33+) | Binary flags ± weighted score |
| Primary use | Mortality prediction | Risk adjustment, resource use |
| Age component | Included (0-4 points) | Not included |
| Weighting | Original 1987 fixed weights | Multiple options (unweighted, van Walraven) |
Charlson: Single summary score; simpler models; established benchmarks.
Elixhauser: Granular profiles; flexible modeling (flags as covariates); captures conditions not in Charlson (obesity, depression, substance abuse).
Weighting Systems
Charlson Original Weights (1987)
| Weight | Conditions |
|---|---|
| 1 | MI, CHF, PVD, CVD, Dementia, COPD, Rheumatic, PUD, Mild liver, DM w/o CC |
| 2 | DM w/ CC, Paraplegia, Renal disease, Cancer (non-metastatic) |
| 3 | Moderate/severe liver disease |
| 6 | Metastatic cancer, AIDS |
Charlson Age Score
| Age | Points |
|---|---|
| ≤50 | 0 |
| 51-60 | 1 |
| 61-70 | 2 |
| 71-80 | 3 |
| >80 | 4 |
Elixhauser van Walraven Weights (selected)
| Weight | Conditions |
|---|---|
| +12 | Metastatic cancer |
| +11 | Liver disease |
| +9 | Lymphoma |
| +7 | CHF, Paralysis |
| +6 | Other neurological, Weight loss |
| +5 | Cardiac arrhythmias, Renal failure, Fluid/electrolyte |
| +4 | Pulmonary circulation, Solid tumor |
| +3 | Chronic pulmonary, Coagulopathy |
| +2 | Peripheral vascular |
| -1 | Valvular disease |
| -2 | Blood loss anemia, Deficiency anemias |
| -3 | Depression |
| -4 | Obesity |
| -7 | Drug abuse |
| 0 | HTN, DM, Hypothyroid, PUD, AIDS, RA, Alcohol, Psychoses |
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.
- 9d ago First seen · 123 lines · 51 tokens per session scan A 4c416ae94e9d
comorbidity-score is a skill published in the GitHub repository hannesill/m4 (43 stars, last pushed 1mo ago), licensed MIT. It adds 51 tokens to every session and 1,695 once invoked, about $0.0003 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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