dna-methylation-quality-control

dna-methylation-quality-control is a skill for Claude Code, Codex from HolobiomicsLab/asb-skill-collections. It costs 42 tokens per session (1,459 once invoked), scanned A, original, Apache-2.0.

A quality-control workflow for Illumina 450K and EPIC DNA methylation arrays, which measure chemical changes attached to DNA, that removes unreliable probes.

In plain words
What is it for?
It helps filter raw IDAT files or beta-value tables using detection p-values and bead counts before normalization or DMR analysis.
Why use it?
Probes with weak or inconsistent signals can distort normalization and later comparisons between samples.

Skill for Claude CodeCodex

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

Good fit It helps filter raw IDAT files or beta-value tables using detection p-values and bead counts before normalization or DMR analysis.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/holobiomicslab/asb-skill-collections/dna-methylation-quality-control
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 HolobiomicsLab/asb-skill-collections --skill dna-methylation-quality-control
Clone the repo
git clone --depth 1 https://github.com/HolobiomicsLab/asb-skill-collections

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 dna-methylation-quality-control

README.md
[![agentmods](https://agentmods.dev/badge/skills/holobiomicslab/asb-skill-collections/dna-methylation-quality-control/github.svg)](https://agentmods.dev/skills/holobiomicslab/asb-skill-collections/dna-methylation-quality-control)
Your own site
<a href="https://agentmods.dev/skills/holobiomicslab/asb-skill-collections/dna-methylation-quality-control"><img src="https://agentmods.dev/badge/skills/holobiomicslab/asb-skill-collections/dna-methylation-quality-control/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 dna-methylation-quality-control

Your own site · 80×15
<a href="https://agentmods.dev/skills/holobiomicslab/asb-skill-collections/dna-methylation-quality-control"><img src="https://agentmods.dev/badge/skills/holobiomicslab/asb-skill-collections/dna-methylation-quality-control.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,459 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 $0.00042 $0.01459
Opus 5 $0.00021 $0.00730
Sonnet 5 $0.00008 $0.00292
Haiku 4.5 $0.00004 $0.00146

Measured 9d ago against content hash b23e3c01f95c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

dna-methylation-quality-control 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.

collections/epigenomics/v1/skills/dna-methylation-quality-control/SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

dna-methylation-quality-control

Summary

Apply detection p-value and bead count thresholds to remove low-quality probes from Illumina methylation array data (450K or EPIC). This filtering step is essential for downstream analysis, removing probes with insufficient signal reliability before normalization and differential methylation analysis.

When to use

Apply this skill immediately after loading raw .idat files or beta-value matrices from HumanMethylation450 or EPIC arrays when you need to exclude probes that fail quality control. Specifically, use it when your input dataset contains detection p-values and bead count information and you have not yet performed downstream analyses (normalization, batch correction, or DMR detection).

When NOT to use

  • Input data has already been filtered by another pipeline or tool (detection p-values and bead counts no longer available)
  • You are working with single-cell methylation data or non-array-based methods (WGBS, bisulfite sequencing)
  • Your analysis explicitly requires retaining low-signal probes for specific methodological reasons

Inputs

  • Raw .idat files from Illumina methylation array (450K or EPIC)
  • Beta-value matrix with detection p-values and bead count data
  • Sample metadata (phenotype information, batch labels)

Outputs

  • Filtered probe count matrix (probes × samples)
  • Quality control report documenting probe removal statistics
  • Pre- and post-filter probe count comparison
  • Bead count distribution plots

How to apply

Load the methylation array data using ChAMP data import functions (from .idat files or beta-valued matrix), then apply champ.filter() with default parameters. This function performs two successive filtering steps: (1) removal of probes with detection p-value > 0.01, and (2) removal of probes with fewer than 3 beads in at least 5% of samples per probe. Compare pre- and post-filter probe counts and examine bead count distributions to verify filtering efficacy. Document the number of probes retained and removed in a quality control report.

Read the full file on GitHub · 99 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 · 99 lines · 42 tokens per session scan A b23e3c01f95c

Subscribe to this mod's changes

dna-methylation-quality-control is a skill published in the GitHub repository HolobiomicsLab/asb-skill-collections (15 stars, last pushed yesterday), licensed Apache-2.0. It adds 42 tokens to every session and 1,459 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 2026-09-03.

Related

Other skills, from other repositories

external-model-validation

Use when validating an existing prognostic risk signature on an external bulk expression cohort with survival outcomes, producing risk scores, Kaplan-Meier curves, risk distribution plots, heatmap, and time-dependent ROC curves. NOT for: model training, feature selection, nomogram construction, calibration analysis…

aipoch/medical-research-skills · 66 tokens

gsva-analysis-and-visualization

Use this skill to run GSVA or ssGSEA pathway-level differential analysis from a bulk expression matrix and a sample group file, then generate a heatmap from the saved GSVA result object. Trigger keywords: GSVA, ssGSEA, pathway enrichment, KEGG pathway analysis, MSigDB. NOT for: gene-level differential expression…

aipoch/medical-research-skills · 88 tokens

medical-research-literature-reader-pro

A medical-research-native literature reading skill for users with clinical, bioinformatics, translational, and basic experimental backgrounds. Use this skill whenever a user wants to read, analyze, critique, or interpret a medical or scientific paper — whether they provide a PDF, abstract, DOI, PMID, or just a title.…

aipoch/medical-research-skills · 199 tokens

adverse-event-narrative

Generates CIOMS I-compliant ICSR narratives from adverse event case data for FDA and EMA regulatory submission. Includes temporal analysis, MedDRA coding, causality assessment using WHO-UMC or Naranjo criteria, and multi-format output.

aipoch/medical-research-skills · 57 tokens

anatomy-quiz-master

Generate interactive anatomy quizzes for medical education with multiple.

aipoch/medical-research-skills · 17 tokens

decision-curve-analysis

Use when evaluating the clinical utility of a binary prediction model from a single clinical CSV file by fitting a logistic decision-curve model, plotting decision and clinical-impact curves, and exporting summary outputs. NOT for: survival calibration, ROC-only discrimination analysis, nomogram construction, or…

aipoch/medical-research-skills · 64 tokens