methylation-probe-count-validation

methylation-probe-count-validation is a skill for Claude Code, Codex from HolobiomicsLab/asb-skill-collections. It costs 31 tokens per session (1,244 once invoked), scanned A, original, Apache-2.0.

A check for confirming that raw human DNA methylation array data contains the expected number of probes before quality filtering. It also checks whether a HumanMethylation450K or EPIC array was detected.

In plain words
What is it for?
Use it immediately after loading raw .idat files or a full beta-value matrix with ChAMP. It helps verify data integrity before filtering, normalization, or analysis.
Why use it?
It catches incomplete imports or incorrect array detection before later analysis produces misleading results.

Skill for Claude CodeCodex

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

Good fit Use it immediately after loading raw .idat files or a full beta-value matrix with ChAMP. It helps verify data integrity before filtering, normalization, or analysis.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/holobiomicslab/asb-skill-collections/methylation-probe-count-validation
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 methylation-probe-count-validation
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 methylation-probe-count-validation

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/holobiomicslab/asb-skill-collections/methylation-probe-count-validation"><img src="https://agentmods.dev/badge/skills/holobiomicslab/asb-skill-collections/methylation-probe-count-validation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,244 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 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 80
    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.
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 $0.00031 $0.01244
Opus 5 $0.00015 $0.00622
Sonnet 5 $0.00006 $0.00249
Haiku 4.5 $0.00003 $0.00124

Measured 9d ago against content hash add076f8eebb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

methylation-probe-count-validation 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/methylation-probe-count-validation/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.

methylation-probe-count-validation

Summary

Validate that DNA methylation array data has been loaded with the correct total number of probes before quality-based filtering. This skill confirms successful data import and array-type detection by verifying pre-filter probe counts against expected canonical values for HumanMethylation450K and EPIC arrays.

When to use

Apply this skill immediately after loading raw methylation array data using champ.load() or champ.import() to verify data integrity. Use it when you need confidence that the correct array type was detected and all available probes were successfully imported before any downstream filtering, normalization, or analysis steps.

When NOT to use

  • Data has already been filtered by quality metrics; expected probe counts only apply to unfiltered raw imports.
  • Array type is unknown or non-standard (e.g., mouse arrays or custom manifests); canonical probe counts apply only to human 450K and EPIC v1/v2.
  • Input is a pre-processed feature table or reduced dataset; this skill requires raw array data at full probe dimensionality.

Inputs

  • .idat files (methylation array raw data)
  • beta-valued matrix
  • array type specification (450K or EPIC)
  • ChAMPdata annotation package (version ≥2.23.1)

Outputs

  • pre-filter probe count integer
  • confirmation of array type detection
  • validated methylation data object ready for downstream analysis

How to apply

Load methylation array data from .idat files or a beta-valued matrix using champ.load() with the appropriate array type specification. Extract the pre-filter probe count from the returned data object before any quality-control or filtering steps are applied. Compare the reported probe count against the expected canonical values: 485,512 probes for HumanMethylation450 (450K) arrays and 867,531 probes for EPIC arrays. If the observed count matches the expected value, data import was successful and array-type detection is correct. If counts deviate, investigate array annotation mismatches or file corruption.

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. 9d ago First seen · 96 lines · 31 tokens per session scan A add076f8eebb

Subscribe to this mod's changes

methylation-probe-count-validation is a skill published in the GitHub repository HolobiomicsLab/asb-skill-collections (15 stars, last pushed yesterday), licensed Apache-2.0. It adds 31 tokens to every session and 1,244 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.

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