germinal

germinal is a skill for Claude Code, Codex from adaptyvbio/protein-design-skills. It costs 105 tokens per session (847 once invoked), scanned A, original, MIT.

A pipeline for designing new antibodies and nanobodies, which are small antibody-like proteins, for a chosen binding site on a target. It changes antibody loop regions on a fixed framework, designs sequences, and predicts the resulting complex structure.

In plain words
What is it for?
Designing epitope-targeted nanobodies or scFvs, changing antibody CDR loops on a fixed framework, and evaluating candidate antibody structures.
Why use it?
It provides an antibody-format option when a project needs a nanobody or antibody fragment rather than a small generic protein binder. The pipeline is specialized and may require careful setup and tuning.

Skill for Claude CodeCodex

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

Good fit Designing epitope-targeted nanobodies or scFvs, changing antibody CDR loops on a fixed framework, and evaluating candidate antibody structures.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/adaptyvbio/protein-design-skills/germinal
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 adaptyvbio/protein-design-skills --skill germinal
Clone the repo
git clone --depth 1 https://github.com/adaptyvbio/protein-design-skills

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 germinal

README.md
[![agentmods](https://agentmods.dev/badge/skills/adaptyvbio/protein-design-skills/germinal/github.svg)](https://agentmods.dev/skills/adaptyvbio/protein-design-skills/germinal)
Your own site
<a href="https://agentmods.dev/skills/adaptyvbio/protein-design-skills/germinal"><img src="https://agentmods.dev/badge/skills/adaptyvbio/protein-design-skills/germinal/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 germinal

Your own site · 80×15
<a href="https://agentmods.dev/skills/adaptyvbio/protein-design-skills/germinal"><img src="https://agentmods.dev/badge/skills/adaptyvbio/protein-design-skills/germinal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 847 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 $0.00105 $0.00847
Opus 5 $0.00053 $0.00424
Sonnet 5 $0.00021 $0.00169
Haiku 4.5 $0.00011 $0.00085

Measured 11d ago against content hash 80d3e63ef18e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

germinal 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 11d 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.

skills/germinal/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Germinal Antibody and Nanobody Design

Germinal is an open pipeline for epitope-targeted de novo antibody and nanobody design. It hallucinates CDRs on a fixed framework, designs sequences with AbMPNN, and cofolds with a structure predictor (it downloads AlphaFold-Multimer params). Runnable through biomodals.

The biomodals author notes Germinal is finicky and suggests BoltzGen for general binder design; treat Germinal as the antibody-format option, not a default.

Prerequisites

Requirement Value
Runner Modal (biomodals)
GPU H100 (default; GPU env var)
Setup See Getting started

How to run

git clone https://github.com/hgbrian/biomodals && cd biomodals

uv run --with modal --with PyYAML modal run modal_germinal.py \
  --target-yaml target_example.yaml \
  --max-trajectories 1 \
  --max-passing-designs 1

Key parameters

Parameter Default Description
--target-yaml required Target config (target_name, target_pdb_path, target_chain, binder_chain, target_hotspots, length)
--run-type vhh vhh (nanobody) or scfv
--max-trajectories 100 Trajectories to run
--max-passing-designs 10 Stop after this many passing designs
--out-dir ./out/germinal Output directory

Target YAML

target_name: PDL1
target_pdb_path: target.pdb
target_chain: A
binder_chain: B
target_hotspots: "45,67,89"
length: 120

Decision tree

Antibody-format binder?
│
├─ Nanobody / VHH → germinal (run-type vhh) or mber
├─ scFv → germinal (run-type scfv)
└─ Miniprotein (not antibody) → binder-design (boltzgen, bindcraft, mosaic)

For VHH nanobodies, biomodals also has modal_mber.py (mBER) and modal_iggm.py (IgGM) as alternatives.

Cost

Adaptyv's own tests of these models showed Germinal costing about $1.60 per accepted design, averaged across 7 targets.

Read the full file on GitHub · 95 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. 11d ago First seen · 95 lines · 105 tokens per session scan A 80d3e63ef18e

Subscribe to this mod's changes

germinal is a skill published in the GitHub repository adaptyvbio/protein-design-skills (158 stars, last pushed 3mo ago), licensed MIT. It adds 105 tokens to every session and 847 once invoked, about $0.0005 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 2026-08-30.

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