clinical-cohort-protocol-designer

clinical-cohort-protocol-designer is a skill for Claude Code, Codex from aipoch/medical-research-skills. It costs 113 tokens per session (4,422 once invoked), scanned A, original, MIT.

A planning guide for retrospective or prospective clinical cohort studies, which follow groups of people over time to examine outcomes. It covers eligibility, follow-up, endpoints, variables, analysis, and design weaknesses.

In plain words
What is it for?
Designing observational studies of prognosis, treatment effectiveness, exposure-outcome relationships, and real-world clinical evidence.
Why use it?
It helps turn a clinical question into a workable cohort protocol and clarifies whether this study type can answer it.

Skill for Claude CodeCodex

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

Good fit Designing observational studies of prognosis, treatment effectiveness, exposure-outcome relationships, and real-world clinical evidence.

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Install with agentmods
npx agentmods add skills/aipoch/medical-research-skills/clinical-cohort-protocol-designer
About the project

Medical Research Agent Skills is a library of agent instructions for medical and biomedical research, covering evidence analysis, study protocol design, data analysis, and academic writing. Researchers use it to guide compatible coding agents through common scientific workflows. The catalogue contains many of the library's skills and commands.

aipoch/medical-research-skills · 1,860 stars · on GitHub · aipoch.com

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 aipoch/medical-research-skills --skill clinical-cohort-protocol-designer
Clone the repo
git clone --depth 1 https://github.com/aipoch/medical-research-skills

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 clinical-cohort-protocol-designer

README.md
[![agentmods](https://agentmods.dev/badge/skills/aipoch/medical-research-skills/clinical-cohort-protocol-designer/github.svg)](https://agentmods.dev/skills/aipoch/medical-research-skills/clinical-cohort-protocol-designer)
Your own site
<a href="https://agentmods.dev/skills/aipoch/medical-research-skills/clinical-cohort-protocol-designer"><img src="https://agentmods.dev/badge/skills/aipoch/medical-research-skills/clinical-cohort-protocol-designer/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 clinical-cohort-protocol-designer

Your own site · 80×15
<a href="https://agentmods.dev/skills/aipoch/medical-research-skills/clinical-cohort-protocol-designer"><img src="https://agentmods.dev/badge/skills/aipoch/medical-research-skills/clinical-cohort-protocol-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,422 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: 2 findings, up to high

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 →

  • high Anti-Refusal · line 108
    Skill instructs the agent to omit warnings, disclaimers, or ethical commentary. Stripping safety caveats hides risk from the user and is a common jailbreak preamble.
    Fix: Remove instructions that suppress warnings, disclaimers, or ethical commentary. Let the agent surface safety-relevant caveats to the user.
  • medium Excessive Agency · line 169
    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 $0.00113 $0.04422
Opus 5 $0.00056 $0.02211
Sonnet 5 $0.00023 $0.00884
Haiku 4.5 $0.00011 $0.00442

Measured 9d ago against content hash b030aac727c9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

clinical-cohort-protocol-designer 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.

awesome-med-research-skills/Protocol Design/clinical-cohort-protocol-designer/SKILL.md · 471 lines

How it starts

The opening of the file, as written. The whole thing — 471 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Source: https://github.com/aipoch/medical-research-skills

Clinical Cohort Protocol Designer

You are an expert clinical research protocol strategist specializing in retrospective and prospective cohort study design, cohort eligibility logic, follow-up architecture, endpoint framing, variable collection systems, bias control, and statistical analysis planning.

Task: Convert a clinical research question, exposure-outcome idea, prognostic objective, treatment-effectiveness question, or real-world evidence concept into a structured retrospective or prospective clinical cohort study protocol framework.

This skill is for users who need a cohort-design-ready study plan, not a generic research idea, not a mechanistic wet-lab plan, and not a completed manuscript. The output should tell the user whether a cohort design is appropriate, what the source population and time-zero should be, how to define entry criteria, follow-up, endpoints, covariates, analysis strategy, and where the main design vulnerabilities lie.

This skill must always distinguish between:

  • the target clinical question
  • the source population from which the cohort is actually constructed
  • baseline variables measured before or at time-zero
  • post-baseline variables that should not be treated as baseline confounders
  • eligibility logic versus analysis subgroup logic
  • retrospective versus prospective cohort structure
  • descriptive association versus causal interpretation
  • time-to-event, binary, longitudinal, and competing-risk outcome structures
  • data that are truly available versus variables the protocol would ideally want

This skill must not confuse cohort protocol design with case-control design, cross-sectional design, randomized trial design, or pure biomarker discovery without cohort logic.


Reference Module Integration

The references/ directory is not optional background material. It defines the operational rules that must be actively used while running this skill.

Read the full file on GitHub · 471 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. 9d ago First seen · 471 lines · 113 tokens per session scan A b030aac727c9

Subscribe to this mod's changes

clinical-cohort-protocol-designer is a skill published in the GitHub repository aipoch/medical-research-skills (1,860 stars, last pushed 1mo ago), licensed MIT. It adds 113 tokens to every session and 4,422 once invoked, about $0.0006 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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