bindcraft

bindcraft is a skill for Claude Code, Codex from zongtingwei/Bioclaw_Skills_Hub. It costs 107 tokens per session (1,657 once invoked), scanned A, original, MIT.

A protein-binder design tool that jointly creates protein structures and amino-acid sequences, with structure checks included.

In plain words
What is it for?
Designing proteins that attach to a target structure, while choosing binder lengths, target regions, design speed, and the number of candidate designs.
Why use it?
It combines several design steps and validation in one workflow, reducing the need to connect separate tools manually.

Skill for Claude CodeCodex

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

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is **First time?** See [Installation Guide](../../docs/installation.md) to set up Modal and biomodals..

Good fit Designing proteins that attach to a target structure, while choosing binder lengths, target regions, design speed, and the number of candidate designs.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/zongtingwei/Bioclaw_Skills_Hub
agentmods
npx agentmods add skills/zongtingwei/bioclaw_skills_hub/bindcraft

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 bindcraft

README.md
[![agentmods](https://agentmods.dev/badge/skills/zongtingwei/bioclaw_skills_hub/bindcraft/github.svg)](https://agentmods.dev/skills/zongtingwei/bioclaw_skills_hub/bindcraft)
Your own site
<a href="https://agentmods.dev/skills/zongtingwei/bioclaw_skills_hub/bindcraft"><img src="https://agentmods.dev/badge/skills/zongtingwei/bioclaw_skills_hub/bindcraft/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 bindcraft

Your own site · 80×15
<a href="https://agentmods.dev/skills/zongtingwei/bioclaw_skills_hub/bindcraft"><img src="https://agentmods.dev/badge/skills/zongtingwei/bioclaw_skills_hub/bindcraft.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,657 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.
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 $0.00107 $0.01657
Opus 5 $0.00053 $0.00829
Sonnet 5 $0.00021 $0.00331
Haiku 4.5 $0.00011 $0.00166

Measured 11d ago against content hash 29d4daef626b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

bindcraft 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/protein-design/skills/bindcraft/SKILL.md · 215 lines

How it starts

The opening of the file, as written. The whole thing — 215 lines — stays where its author put it; the contents beside it link to each section on GitHub.

BindCraft Binder Design

Prerequisites

Requirement Minimum Recommended
Python 3.9+ 3.10
CUDA 11.7+ 12.0+
GPU VRAM 32GB 48GB (L40S)
RAM 32GB 64GB

How to run

First time? See Installation Guide to set up Modal and biomodals.

Option 1: Modal (recommended)

cd biomodals
modal run modal_bindcraft.py \
  --target-pdb target.pdb \
  --target-chain A \
  --binder-lengths 70-100 \
  --hotspots "A45,A67,A89" \
  --num-designs 50

GPU: L40S (48GB) | Timeout: 3600s default

Option 2: Local installation

git clone https://github.com/martinpacesa/BindCraft.git
cd BindCraft
pip install -r requirements.txt

python bindcraft.py \
  --target target.pdb \
  --target_chains A \
  --binder_lengths 70-100 \
  --hotspots A45,A67,A89 \
  --num_designs 50

Key parameters

Parameter Default Range Description
--target-pdb required path Target structure
--target-chain required A-Z Target chain(s)
--binder-lengths 70-100 40-150 Length range
--hotspots None residues Target hotspots
--num-designs 50 1-500 Number of designs
--protocol default fast/default/slow Quality vs speed

Protocols

Protocol Speed Quality Use Case
fast Fast Lower Initial screening
default Medium Good Standard campaigns
slow Slow High Final production

Output format

output/
├── design_0/
│   ├── binder.pdb         # Final design
│   ├── complex.pdb        # Binder + target
│   ├── metrics.json       # QC scores
│   └── trajectory/        # Optimization trajectory
├── design_1/
│   └── ...
└── summary.csv            # All metrics

Metrics Output

{
  "plddt": 0.89,
  "ptm": 0.78,
  "iptm": 0.62,
  "pae": 8.5,
  "rmsd": 1.2,
  "sequence": "MKTAYIAK..."
}

Read the full file on GitHub · 215 lines

Files

What ships with it

3 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. 11d ago First seen · 215 lines · 107 tokens per session scan A 29d4daef626b

Subscribe to this mod's changes

bindcraft is a skill published in the GitHub repository zongtingwei/Bioclaw_Skills_Hub (26 stars, last pushed 5mo ago), licensed MIT. It adds 107 tokens to every session and 1,657 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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