bio-comparative-genomics-genome-distance-and-species-delineation

bio-comparative-genomics-genome-distance-and-species-delineation is a skill for Claude Code, Codex from GPTomics/bioSkills. It costs 218 tokens per session (7,502 once invoked), scanned A, original, MIT.

A bioinformatics workflow for comparing whole genomes and estimating how closely related they are. It also assigns names or taxonomic groups using reference databases.

In plain words
What is it for?
Use it to calculate genome similarity measures, compare bacterial or archaeal genomes, and check or assign their taxonomy.
Why use it?
It replaces several separate genome-comparison tools and helps distinguish closely related species when ordinary similarity searches are not enough.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit Use it to calculate genome similarity measures, compare bacterial or archaeal genomes, and check or assign their taxonomy.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gptomics/bioskills/genome-distance-and-species-delineation
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 GPTomics/bioSkills --skill genome-distance-and-species-delineation
Clone the repo
git clone --depth 1 https://github.com/GPTomics/bioSkills

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-comparative-genomics-genome-distance-and-species-delineation

README.md
[![agentmods](https://agentmods.dev/badge/skills/gptomics/bioskills/genome-distance-and-species-delineation/github.svg)](https://agentmods.dev/skills/gptomics/bioskills/genome-distance-and-species-delineation)
Your own site
<a href="https://agentmods.dev/skills/gptomics/bioskills/genome-distance-and-species-delineation"><img src="https://agentmods.dev/badge/skills/gptomics/bioskills/genome-distance-and-species-delineation/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-comparative-genomics-genome-distance-and-species-delineation

Your own site · 80×15
<a href="https://agentmods.dev/skills/gptomics/bioskills/genome-distance-and-species-delineation"><img src="https://agentmods.dev/badge/skills/gptomics/bioskills/genome-distance-and-species-delineation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 218 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,502 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00218 $0.07502
Opus 5 $0.00109 $0.03751
Sonnet 5 $0.00044 $0.01500
Haiku 4.5 $0.00022 $0.00750

Measured 9d ago against content hash 5ab7a1216d36, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

bio-comparative-genomics-genome-distance-and-species-delineation scanned grade A with 1 finding 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.

The scan reads SKILL.md. This mod also ships 1 executable file (examples/skani_ani_species_delineation.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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

wget https://data.gtdb.ecogenomic.org/releases/release220/220.0/auxillary_files/gtdbtk_r220_data.tar.gz
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

comparative-genomics/genome-distance-and-species-delineation/SKILL.md · 438 lines

How it starts

The opening of the file, as written. The whole thing — 438 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Version Compatibility

Reference examples tested with: skani 0.2.5+ (Shaw & Yu 2023 Nat Methods 20:1661; bluenote-1577/skani), FastANI 1.34+ (Jain 2018 Nat Commun 9:5114), pyani 0.3.0+ (Pritchard 2016 Anal Methods 8:12), pyskani 0.1+ (Larralde 2025), OrthoANI 1.40+ (Lee 2016 Int J Syst Evol Microbiol 66:1100), OrthoANIu 1.2+, GTDB-Tk 2.7.1+ (Chaumeil 2022 Bioinformatics 38:5315), GTDB release 220 (2024-Q3+), TYGS web (Meier-Kolthoff & Goker 2019 Nat Commun 10:2182), GGDC v3.0 (web), Mash 2.3+ (Ondov 2016 Genome Biol 17:132), Dashing 2 (Baker & Langmead 2023 Genome Res 33:1218), CompareM 0.1.2+ for AAI (Parks/Cherubini), pyANI 0.3.1+, BLAT 36+, DIAMOND 2.1+. JSpeciesWS web (Richter et al 2016 Bioinformatics 32:929).

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

  • CLI: skani --version; fastANI --version; gtdbtk --version; mash --version; pyani --version
  • Python: pip show gtdbtk pyani

If code throws GTDB-Tk database not found, skani sketch incompatible, Mash sketch version, these tools have database-version coupling: GTDB-Tk requires the GTDB release matched to the binary version; Mash/skani sketches are forward-compatible but not always backward. Check gtdbtk check_install for database completeness.

Genome Distance and Species Delineation

"Are these genomes the same species, and what species are they?" -> Prokaryote species delineation has shifted from 16S rRNA identity (now considered insufficient at < 98.7%) to whole-genome ANI at a 95% threshold (Jain 2018 Nat Commun 9:5114; corroborating Goris 2007 and Konstantinidis 2005). The modern operational standard for taxonomy is GTDB-Tk (Chaumeil 2020/2022 Bioinformatics 38:5315), which assigns genomes to the Genome Taxonomy Database (GTDB) using ANI radius + marker-gene placement. skani (Shaw & Yu 2023 Nat Methods 20:1661) has replaced FastANI as the default ANI tool in GTDB-Tk 2.4+ for being 20-30x faster while maintaining accuracy. The 95% ANI threshold is robust but not absolute -- the species circumscription radius varies by genus (Parks 2018 Nat Biotech 36:996).

Read the full file on GitHub · 438 lines

Files

What ships with it

2 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. 9d ago First seen · 438 lines · 218 tokens per session scan A 5ab7a1216d36

Subscribe to this mod's changes

bio-comparative-genomics-genome-distance-and-species-delineation is a skill published in the GitHub repository GPTomics/bioSkills (1,201 stars, last pushed 28d ago), licensed MIT. It adds 218 tokens to every session and 7,502 once invoked, about $0.0011 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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