probe-detection-pvalue-filtering

probe-detection-pvalue-filtering is a skill for Claude Code, Codex from HolobiomicsLab/asb-skill-collections. It costs 48 tokens per session (1,359 once invoked), scanned A, original, Apache-2.0.

A quality-control step for DNA methylation array data from 450k or EPIC chips. It removes probes whose signal is too unreliable, using a detection p-value above 0.01 as the cutoff.

In plain words
What is it for?
Filtering raw .idat files or beta-value matrices to retain dependable methylation probes before downstream analysis.
Why use it?
It prevents low-confidence measurements from affecting normalization and later analysis. Use it early, before other processing, unless the data was already filtered or the study requires every probe.

Skill for Claude CodeCodex

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

Good fit Filtering raw .idat files or beta-value matrices to retain dependable methylation probes before downstream analysis.

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Install with agentmods
npx agentmods add skills/holobiomicslab/asb-skill-collections/probe-detection-pvalue-filtering
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 probe-detection-pvalue-filtering
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 probe-detection-pvalue-filtering

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/holobiomicslab/asb-skill-collections/probe-detection-pvalue-filtering"><img src="https://agentmods.dev/badge/skills/holobiomicslab/asb-skill-collections/probe-detection-pvalue-filtering.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,359 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: 1 finding, up to medium

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 →

  • medium Excessive Agency · line 60
    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 $0.00048 $0.01359
Opus 5 $0.00024 $0.00679
Sonnet 5 $0.00010 $0.00272
Haiku 4.5 $0.00005 $0.00136

Measured 6d ago against content hash 5c225d778f79, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

probe-detection-pvalue-filtering 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 6d 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/probe-detection-pvalue-filtering/SKILL.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

probe-detection-pvalue-filtering

Summary

Remove low-quality DNA methylation probes by filtering out those with detection p-value > 0.01 using ChAMP's default filtering function. This is a standard quality-control step applied early in the 450k and EPIC array analysis pipeline to exclude probes with unreliable signal intensity measurements.

When to use

Apply this skill immediately after loading raw methylation array data (.idat files or beta-valued matrix) from HumanMethylation450 (450k) or EPIC arrays when conducting primary quality control. Use it before normalization, type-2 probe correction, or downstream statistical analysis to ensure that only probes with confident detection calls are carried forward.

When NOT to use

  • Data has already undergone detection p-value filtering in an upstream pipeline
  • Working with pre-filtered public datasets where probe quality has already been vetted
  • Analysis requires retention of all probes, including low-confidence ones, for methodological reasons (e.g., benchmarking filtering algorithms themselves)

Inputs

  • Raw methylation array data from HumanMethylation450 or EPIC arrays (.idat files)
  • Beta-valued matrix (M-values or beta values) from methylation arrays
  • Detection p-value matrix (one p-value per probe per sample)

Outputs

  • Filtered probe matrix with low-confidence probes removed
  • Pre- and post-filter probe count comparison
  • Quality control report documenting filtering statistics

How to apply

Load your 450k or EPIC methylation array dataset using ChAMP's data import functions (from .idat files or beta-valued matrix). Apply champ.filter() with default parameters, which automatically removes probes with detection p-value > 0.01 in the first filtering step. This threshold reflects Illumina's standard confidence threshold for detected signal above background noise. Verify filtering success by comparing probe counts before and after filtering; probes with p-value > 0.01 should be absent from the post-filter matrix. Document the number of probes retained and removed in a quality control report for transparency and reproducibility.

Read the full file on GitHub · 96 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. 6d ago First seen · 96 lines · 48 tokens per session scan A 5c225d778f79

Subscribe to this mod's changes

probe-detection-pvalue-filtering is a skill published in the GitHub repository HolobiomicsLab/asb-skill-collections (15 stars, last pushed yesterday), licensed Apache-2.0. It adds 48 tokens to every session and 1,359 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 2026-09-06.

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