bio-causal-genomics-genomic-sem

bio-causal-genomics-genomic-sem is a skill for Claude Code, Codex from PKU-YuanGroup/OpenAI4S. It costs 162 tokens per session (8,747 once invoked), scanned A, a copy of bio-causal-genomics-genomic-sem, MIT.

A research workflow for modelling shared genetic factors across several traits using GWAS summary statistics, which are condensed results from genome-wide association studies. GenomicSEM is a statistical modelling method that represents hidden genetic factors and relationships between traits.

In plain words
What is it for?
Use it to fit common-factor, confirmatory-factor, or exploratory models, run genetic-factor GWAS analyses, test several traits together, and examine differences in genetic effects or heritability across genomic annotations.
Why use it?
It helps analyse several related traits together instead of treating each GWAS result as completely separate. This can clarify which genetic factors are shared and where results differ between traits.

Skill for Claude CodeCodex

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

Good fit Use it to fit common-factor, confirmatory-factor, or exploratory models, run genetic-factor GWAS analyses, test several traits together, and examine differences in genetic effects or heritability across genomic annotations.

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Install with agentmods
npx agentmods add skills/pku-yuangroup/openai4s/bio-causal-genomics-genomic-sem
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 PKU-YuanGroup/OpenAI4S --skill bio-causal-genomics-genomic-sem
Clone the repo
git clone --depth 1 https://github.com/PKU-YuanGroup/OpenAI4S

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 bio-causal-genomics-genomic-sem

README.md
[![agentmods](https://agentmods.dev/badge/skills/pku-yuangroup/openai4s/bio-causal-genomics-genomic-sem/github.svg)](https://agentmods.dev/skills/pku-yuangroup/openai4s/bio-causal-genomics-genomic-sem)
Your own site
<a href="https://agentmods.dev/skills/pku-yuangroup/openai4s/bio-causal-genomics-genomic-sem"><img src="https://agentmods.dev/badge/skills/pku-yuangroup/openai4s/bio-causal-genomics-genomic-sem/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 bio-causal-genomics-genomic-sem

Your own site · 80×15
<a href="https://agentmods.dev/skills/pku-yuangroup/openai4s/bio-causal-genomics-genomic-sem"><img src="https://agentmods.dev/badge/skills/pku-yuangroup/openai4s/bio-causal-genomics-genomic-sem.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 162 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,747 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.
Origin 97% copy Near-identical to another mod 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 $0.00162 $0.08747
Opus 5 $0.00081 $0.04373
Sonnet 5 $0.00032 $0.01749
Haiku 4.5 $0.00016 $0.00875

Measured 13d ago against content hash 05bad8d5580e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

bio-causal-genomics-genomic-sem 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 13d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/mtag_pipeline.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

97% identical to bio-causal-genomics-genomic-sem — 12 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/bioskills/bio-causal-genomics-genomic-sem/SKILL.md · 500 lines

How it starts

The opening of the file, as written. The whole thing — 500 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Version Compatibility

Reference examples tested with: GenomicSEM 0.0.5+ (GitHub GenomicSEM/GenomicSEM), lavaan 0.6-17+, LDSC v1.0.1+ (Python 3; prefer abdenlab/ldsc-python3 v2.0.0 -- belowlab/ldsc v3.0.1 README states the CLI is broken; Docker jtb114/ldsc:latest is the belowlab fallback), baselineLD_v2.2 annotations (alkesgroup.broadinstitute.org/LDSCORE), MTAG 1.0.8+ (Python; JonJala/mtag), R 4.4+.

Before using code patterns, verify installed versions match. If versions differ:

  • R: packageVersion('GenomicSEM') then ?ldsc, ?commonfactor, ?usermodel, ?commonfactorGWAS
  • Python (LDSC, MTAG): <tool>.py -h and inspect the source under ldsc/ or mtag/

GenomicSEM is GitHub-only (never on CRAN). If ldsc() or usermodel() throws an error about lavaan syntax or non-positive-definite covariance, introspect the installed API (getMethod('ldsc')) and adapt rather than retrying.

Genomic SEM

"Model the latent genetic architecture across several correlated GWAS" -> Treat each GWAS as a measured indicator of one or more latent genetic factors and fit a structural equation model to the LDSC-derived genetic covariance matrix S and its sampling covariance V (Grotzinger 2019 Nat Hum Behav 3:513). The framework extends naturally to a multivariate GWAS in which a SNP is regressed on a latent factor (common-factor GWAS), with Q_SNP testing whether the SNP effect is homogeneous across factor loadings. Sample overlap between input GWAS is absorbed by the off-diagonals of V; ignoring V inflates Type-I.

  • R: GenomicSEM::ldsc() produces the (S, V) covariance pair from munged sumstats
  • R: GenomicSEM::commonfactor() fits a single-factor CFA across all traits in S
  • R: GenomicSEM::usermodel() fits an arbitrary lavaan-syntax model
  • R: GenomicSEM::commonfactorGWAS() runs SNP -> factor multivariate GWAS with Q_SNP
  • R: GenomicSEM::userGWAS() runs arbitrary multivariate SNP regression with per-path Q_SNP
  • Python (alternative): mtag.py --sumstats t1,t2,t3 --out mtag_out (multi-trait power boost on individual traits)

Read the full file on GitHub · 500 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 13d ago First seen · 500 lines · 162 tokens per session scan A 05bad8d5580e

Subscribe to this mod's changes

bio-causal-genomics-genomic-sem is a skill published in the GitHub repository PKU-YuanGroup/OpenAI4S (407 stars, last pushed yesterday), licensed MIT. It adds 162 tokens to every session and 8,747 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. It is 97% identical to bio-causal-genomics-genomic-sem, differing in 12 lines, and is treated as a copy.

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