boltz

boltz is a skill for Claude Code from K-Dense-AI/drug-discovery-agent-skills. It costs 145 tokens per session (2,178 once invoked), scanned A, original, MIT.

A protein-structure and molecular-binding prediction tool that models proteins together with small molecules, other proteins, or nucleic acids.

In plain words
What is it for?
Use it to prepare Boltz-2 input files, predict protein–ligand or other complexes, apply pocket constraints or templates, and estimate binding affinity.
Why use it?
It helps explore possible binding structures and rank compounds when experimental structures or measurements are unavailable, while keeping confidence and prediction limits in view.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: built for openclaw.

Good fit Use it to prepare Boltz-2 input files, predict protein–ligand or other complexes, apply pocket constraints or templates, and estimate binding affinity.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/k-dense-ai/drug-discovery-agent-skills/boltz
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 K-Dense-AI/drug-discovery-agent-skills --skill boltz
Clone the repo
git clone --depth 1 https://github.com/K-Dense-AI/drug-discovery-agent-skills

Made for: Claude Code.

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 boltz

README.md
[![agentmods](https://agentmods.dev/badge/skills/k-dense-ai/drug-discovery-agent-skills/boltz/github.svg)](https://agentmods.dev/skills/k-dense-ai/drug-discovery-agent-skills/boltz)
Your own site
<a href="https://agentmods.dev/skills/k-dense-ai/drug-discovery-agent-skills/boltz"><img src="https://agentmods.dev/badge/skills/k-dense-ai/drug-discovery-agent-skills/boltz/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 boltz

Your own site · 80×15
<a href="https://agentmods.dev/skills/k-dense-ai/drug-discovery-agent-skills/boltz"><img src="https://agentmods.dev/badge/skills/k-dense-ai/drug-discovery-agent-skills/boltz.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 145 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,178 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: 2 findings, up to medium

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 →

  • medium analysis-evasion · line 1
    Suspicious Unicode normalization or mixed-script content
    Fix: Review the flagged content for security risks. Ensure no credentials, secrets, or sensitive data are exposed.
  • medium Rogue Agent · line 5
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 $0.00145 $0.02178
Opus 5 $0.00072 $0.01089
Sonnet 5 $0.00029 $0.00436
Haiku 4.5 $0.00015 $0.00218

Measured 12d ago against content hash 153841d19cab, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

boltz 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 12d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/collect_results.py, scripts/make_boltz_yaml.py, scripts/screen_library.py), 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.

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/boltz/SKILL.md · 163 lines

How it starts

The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Boltz-2

An open-weights cofolding model in the AlphaFold3 family, plus something AlphaFold3 does not have: a trained binding-affinity head. Give it a protein sequence and a ligand SMILES and it returns a complex structure, per-interface confidence, and a predicted potency — with weights licensed for commercial use.

Repo: github.com/jwohlwend/boltz Checked against: boltz 2.2.1 (PyPI), Python ≥3.10 <3.13.

Read references/yaml-schema.md before writing an input, references/confidence-and-affinity.md before believing an output, and references/running.md for install, GPU sizing, flags, and errors.

When to reach for this

Situation Use
No experimental structure, and you need a ligand in the pocket Boltz — folding and docking in one step
Experimental structure exists, defined site, need to rank thousands autodock-vina
Experimental structure exists, need a pose without a box diffdock
Need a defensible free energy for a congeneric series Alchemical FEP, not this
No GPU tamarind runs Boltz as a service

The loop

# 1. write the input
python skills/boltz/scripts/make_boltz_yaml.py \
    --protein-fasta target.fasta \
    --ligand-smiles "Cc1ccc(cc1Nc1nccc(n1)c1cccnc1)NC(=O)c1ccc(CN2CCN(C)CC2)cc1" \
    --affinity --out complex.yaml

# 2. predict (external, needs a GPU)
boltz predict complex.yaml --out_dir predictions/ --use_msa_server \
    --use_potentials --diffusion_samples 5

# 3. read the results with the units converted
python skills/boltz/scripts/collect_results.py predictions/
name  sample  confidence_score  iptm  ligand_iptm  binder_probability  pIC50  IC50_uM  dG_kcal_mol
lig1  0       0.84              0.82  0.79         0.93                8.10   0.0079   -11.05
lig2  0       0.51              0.42  0.31         0.21                4.60   25.1189  -6.27

Read the full file on GitHub · 163 lines

Files

What ships with it

6 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. 12d ago First seen · 163 lines · 145 tokens per session scan A 153841d19cab

Subscribe to this mod's changes

boltz is a skill published in the GitHub repository K-Dense-AI/drug-discovery-agent-skills (28 stars, last pushed 5d ago), licensed MIT. It adds 145 tokens to every session and 2,178 once invoked, about $0.0007 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.