Agent skill

Recombinator

by ClawBio in ClawBio/ClawBio

Produce offspring genomes from parent pairs via meiotic recombination, mutation, and clinical evaluation

MITAuto-check passedResearch & Science

Install Recombinator

skills CLI
$ npx skills add ClawBio/ClawBio --skill recombinator -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ClawBio/ClawBio recombinator --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ClawBio/ClawBio.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/recombinator .claude/skills/recombinator && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
recombinator
GitHub stars
1.2k
Used in
1 other repo
Token cost
~651 tokens
SKILL.md length
163 words
Files
2
Skills in repo
104
Repo updated
First seen
Licence
MIT

At a glance

Produce offspring genomes from parent pairs via meiotic recombination, mutation, and clinical evaluation

  • Works in 6 steps: Mendelian segregation: one allele… → De novo mutation: configurable rate per… → Sex determination: 50/50 coin flip (XY… → …
  • Tasks that involve Bioinformatics
  • SKILL.md covers Purpose, How It Works, Input and Output, plus 2 more sections
  • Runs Python scripts from its folder; calls python

What it does

Recombinator is an agent skill from ClawBio/ClawBio. Produce offspring genomes from parent pairs via meiotic recombination, mutation, and clinical evaluation

Its SKILL.md is about 650 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `recombinator.py`).

It sits in Research & Science, covering Bioinformatics. The repository describes itself as: 🦖 ClawBio - The first bioinformatics-native AI agent skill library. Local-first. Reproducible. Open. Free. The licence is MIT.

When your agent uses it

  • Tasks that involve Bioinformatics

Example prompts

  • “/recombinator”

Requirements

  • Python 3

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Mendelian segregation: one allele inherited from each parent per locus
  2. De novo mutation: configurable rate per locus (default 0.1%), with hotspot
  3. Sex determination: 50/50 coin flip (XY or XX).
  4. Trait inference: reverse-map offspring genotype back to trait scores using
  5. Clinical evaluation: check offspring genotype against disease registry for
  6. Health score: computed from cumulative fitness costs of clinical conditions.

What it can do on your machine

Read from SKILL.md and the folder at commit 5e045e3. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships script files (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Recombinator loads about 651 tokens when it runs. Until then it costs about 29 tokens; SKILL.md has 163 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~29
When it runs · the whole SKILL.md, loaded when a task matches
~651

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from ClawBio/ClawBio at commit 5e045e3, republished under its MIT licence (© ClawBio). 163 words, ~651 tokens.

Download SKILL.mdSave it as .claude/skills/recombinator/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
recombinator
description
Produce offspring genomes from parent pairs via meiotic recombination, mutation, and clinical evaluation
license
MIT
metadata.version
0.1.0
metadata.author
Manuel Corpas
metadata.tags
genomebook, recombination, meiosis, mutation, offspring, clinical-genetics

🧪 Recombinator

Purpose

Produce offspring genomes from selected parent pairs via simulated meiotic recombination. Models Mendelian segregation, de novo mutation, sex determination, and clinical evaluation against a disease registry.

How It Works

  1. Mendelian segregation: one allele inherited from each parent per locus (random selection simulating independent assortment).
  2. De novo mutation: configurable rate per locus (default 0.1%), with hotspot multipliers for cognitive, immune, and metabolic loci. Mutations are classified as disease-risk, protective, or neutral.
  3. Sex determination: 50/50 coin flip (XY or XX).
  4. Trait inference: reverse-map offspring genotype back to trait scores using the trait registry, accounting for dominance models.
  5. Clinical evaluation: check offspring genotype against disease registry for penetrance, onset probability, and fitness cost.
  6. Health score: computed from cumulative fitness costs of clinical conditions.

Input

  • Two parent .genome.json files (one Male, one Female)
  • GENOMEBOOK/DATA/trait_registry.json
  • GENOMEBOOK/DATA/disease_registry.json

Output

  • Offspring .genome.json with:
    • Inherited loci and alleles
    • Mutation log
    • Inferred trait scores
    • Clinical history
    • Health score (0.0 to 1.0)

CLI Usage

bash
# Demo: breed Einstein x Anning, produce 3 offspring
python skills/recombinator/recombinator.py --demo

# Breed specific parents
python skills/recombinator/recombinator.py \
  --father einstein-g0 --mother anning-g0 --offspring 3

# Custom generation number
python skills/recombinator/recombinator.py \
  --father einstein-g0 --mother curie-g0 --offspring 2 --generation 1

Output Format

ID:     g1-001-a3f2c1
Sex:    Female (XX)
Health: 0.9500
Mutations: 1
  - COMT_Val158Met: G->A (neutral, from mother)
Conditions: 0
Top traits:
  - curiosity: 0.92
  - analytical_thinking: 0.88
  - persistence: 0.85

© ClawBio, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in skills/recombinator of ClawBio/ClawBio.

  • SKILL.md
  • recombinator.py

Open the folder on GitHubat commit 5e045e3

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in ClawBio/ClawBio, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Recombinator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Recombinator compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Recombinator this skillClawBio/ClawBio1.2k1 repos~651Automated safety check: PassMIT
Dbsnp Databasegoogle-deepmind/science-skills3.2k3 repos~3.4kAutomated safety check: NotesApache-2.0
Metabolic Study Planneraiming-lab/AutoResearchClaw15k—~1.9kAutomated safety check: PassMIT
13C Metabolic Flux AnalysisK-Dense-AI/scientific-agent-skills48k1 repos~3.2kAutomated safety check: PassMIT
Alphagenome Single Variant Analysisgoogle-deepmind/science-skills3.2k2 repos~3kAutomated safety check: NotesApache-2.0
MFA Pipeline Orchestratoraiming-lab/AutoResearchClaw15k—~923Automated safety check: PassMIT

Similar skills

  • Dbsnp Database

    google-deepmind/science-skills

    A skill your agent uses when you want to look up, map, and search for short genetic variants (SNPs, indels) in NCBI's dbSNP database.

    3.2k GitHub starsUsed in 3 repos~3.4k tokens
    Research & ScienceAuto-check: notes
  • Metabolic Study Planner

    aiming-lab/AutoResearchClaw

    Turns a broad metabolic modelling topic into a concrete, paper-shaped plan with organism, model, perturbations, metrics and figures before any FBA code is written.

    15k GitHub stars~1.9k tokensUpdated 1 mo ago
    Research & ScienceAuto-check passed
  • 13C Metabolic Flux Analysis

    K-Dense-AI/scientific-agent-skills

    Estimates reaction fluxes inside cells from steady-state carbon-13 labeling data with a bundled mfapy-based solver, and reports which fluxes the data pin down.

    48k GitHub starsUsed in 1 repo~3.2k tokens
    Research & ScienceAuto-check passed
  • Alphagenome Single Variant Analysis

    google-deepmind/science-skills

    Analyzes genetic variant effects on gene expression (RNA-seq), chromatin accessibility (DNASE), histone marks (ChIP), and transcription factors using the AlphaGenome API.

    3.2k GitHub starsUsed in 2 repos~3k tokens
    Research & ScienceAuto-check: notes
  • MFA Pipeline Orchestrator

    aiming-lab/AutoResearchClaw

    Runs a metabolic flux analysis from model loading to phenotype prediction and figures by handing work to four sub-agents in sequence.

    15k GitHub stars~923 tokensUpdated 1 mo ago
    Research & ScienceAuto-check passed
  • Singlecell Qc

    xuzhougeng/wisp-science

    A skill your agent uses when designing, reviewing, or implementing single-cell RNA-seq QC in Python or R with a human-in-the-loop, data-driven approach.

    1k GitHub stars~1.6k tokensUpdated today
    Research & ScienceAuto-check passed

More from ClawBio/ClawBio

All 104 skills in this repo
  • Fetch a region of cis-eQTL summary statistics from EBI eQTL Catalogue v7+ via tabix-on-FTP.

    1.2k GitHub starsUsed in 1 repo~4.3k tokens
    Auto-check passed
  • Xena Tcga Gene Query

    ClawBio/ClawBio

    Query TCGA tumor biology through the ucscxenatoolspy API. An agent skill from ClawBio/ClawBio.

    1.2k GitHub stars~4.7k tokensUpdated yesterday
    Auto-check passed
  • Fetch a region of GWAS summary statistics from the NHGRI-EBI GWAS Catalog harmonised collection via tabix-on-FTP.

    1.2k GitHub starsUsed in 1 repo~3.5k tokens
    Auto-check passed
  • Dnasp

    ClawBio/ClawBio

    Population genetics of pre-aligned DNA sequences or multi-sample VCFs using selected DnaSP 6 methods.

    1.2k GitHub stars~5.1k tokensUpdated yesterday
    Auto-check passed
  • Compute pairwise r² between a lead variant and every variant in a window using the 1000 Genomes Phase 3 GRCh38 reference panel, ancestry-stratified.

    1.2k GitHub stars~3.9k tokensUpdated yesterday
    Auto-check passed
  • Ncbi Datasets

    ClawBio/ClawBio

    Download genomes, genes, virus sequences, and taxonomy data from NCBI using the datasets and dataformat CLI tools.

    1.2k GitHub starsUsed in 1 repo~2.8k tokens
    Auto-check passed

Questions about Recombinator

What does Recombinator do?

Produce offspring genomes from parent pairs via meiotic recombination, mutation, and clinical evaluation. Recombinator is an agent skill from ClawBio/ClawBio.

When should I use Recombinator?

Recombinator fits situations like: tasks that involve Bioinformatics.

How do I install Recombinator in Claude Code?

Run `npx skills add ClawBio/ClawBio --skill recombinator -a claude-code`. Or copy the skill folder (skills/recombinator in ClawBio/ClawBio) into .claude/skills/recombinator in your project. Claude Code loads it when a task matches its description.

How do I install Recombinator in Codex?

Run `npx skills add ClawBio/ClawBio --skill recombinator -a codex`. Or copy the skill folder (skills/recombinator in ClawBio/ClawBio) into .agents/skills/recombinator in your project. Codex loads it when a task matches its description.

Can I use Recombinator in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ClawBio/ClawBio --skill recombinator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/recombinator, .gemini/skills/recombinator, .github/skills/recombinator and .opencode/skills/recombinator in your project.

What does Recombinator need to run?

Going by SKILL.md and its folder, Recombinator needs Python for the scripts in its folder and the command-line tools its instructions call (python). Our summary lists: Python 3.

Does Recombinator access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Recombinator safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Recombinator use?

Recombinator is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Recombinator use?

About 651 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Recombinator?

Skills that share tags, products or a category with Recombinator: Dbsnp Database (google-deepmind/science-skills, 3.2k stars), Metabolic Study Planner (aiming-lab/AutoResearchClaw, 15k stars), 13C Metabolic Flux Analysis (K-Dense-AI/scientific-agent-skills, 48k stars) and Alphagenome Single Variant Analysis (google-deepmind/science-skills, 3.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Recombinator?

ClawBio (a GitHub organization) maintains it in ClawBio/ClawBio, which has 1,154 GitHub stars. The repository holds 104 skills in this directory. The repository was last updated on October 7, 2026.

Source: ClawBio/ClawBio on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.