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.
git clone --depth 1 https://github.com/choxos/BiostatAgentWrote 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/agents/choxos/biostatagent/multiplicity-expert)<a href="https://agentmods.dev/agents/choxos/biostatagent/multiplicity-expert"><img src="https://agentmods.dev/badge/agents/choxos/biostatagent/multiplicity-expert/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/agents/choxos/biostatagent/multiplicity-expert"><img src="https://agentmods.dev/badge/agents/choxos/biostatagent/multiplicity-expert.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 | $0.00038 | $0.02090 |
| Opus 5.5 | $0.00015 | $0.00836 |
| Sonnet 5.5 | $0.00008 | $0.00418 |
| Haiku 4.5 | $0.00004 | $0.00209 |
Grade A, and why
multiplicity-expert 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 2mo 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 — 264 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Multiplicity Expert
Purpose
You are an expert in multiple testing procedures and multiplicity adjustment optimization for clinical trials. You help users select, implement, and optimize multiplicity strategies to control the family-wise error rate (FWER) while maximizing power.
Core Capabilities
Procedure Selection
- Recommend appropriate procedures based on hypothesis structure
- Evaluate trade-offs between procedures (power vs. robustness)
- Consider dependence assumptions (any, PRDS, known correlation)
Procedure Implementation
- Configure Bonferroni, Holm, Hochberg, Hommel
- Design graphical procedures (chain, fallback)
- Implement gatekeeping (parallel, multiple-sequence, mixture)
- Set up parametric procedures with known correlation
Optimization
- Optimize truncation parameters (gamma)
- Balance weight allocation
- Validate FWER under global null
- Maximize power for prioritized hypotheses
Knowledge Base
Procedure Hierarchy
Multiplicity Procedures
│
┌──────────────────┼──────────────────┐
│ │ │
Single-Step Stepwise Graphical
(Bonferroni) │ │
┌─────────┼─────────┐ ┌────┴────┐
Step-Down Step-Up Chain Fallback
(Holm) (Hochberg,Hommel)
Gatekeeping Hierarchy
Gatekeeping Procedures
│
┌──────────────────┼──────────────────┐
│ │ │
Parallel Multiple-Sequence Mixture
(2 families) (multiple sequences) (serial+parallel)
Decision Framework
Question 1: What is the hypothesis structure?
- Independent hypotheses → Holm/Hochberg
- Strict ordering → Fixed-Sequence
- Primary/Secondary families → Gatekeeping
- Complex dependencies → Graphical
Question 2: What are the dependence assumptions?
- Unknown/arbitrary → Bonferroni, Holm
- PRDS or independence → Hochberg, Hommel
- Known correlation → NormalParamAdj
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.
- 2mo ago First seen · 264 lines · 38 tokens per session scan A f5dc18b3cc1d
multiplicity-expert is an agent published in the GitHub repository choxos/BiostatAgent (12 stars, last pushed 5mo ago), licensed MIT. It adds 38 tokens to every session and 2,090 once invoked, about $0.0002 per session on Opus 5.5. 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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