esm

esm is a skill for Claude Code, Codex from K-Dense-AI/scientific-agent-skills. It costs 56 tokens per session (2,558 once invoked), scanned A, original, MIT.

A toolkit for working with protein language models that learn patterns from protein sequences. It supports protein design, sequence representations and predictions of three-dimensional protein structure.

In plain words
What is it for?
Generating or completing protein sequences, creating variants, producing numerical representations of proteins, using hosted or local model inference, and predicting protein structures with ESMFold2.
Why use it?
It brings several protein-modelling workflows into one set of tools, reducing the need to work out separate interfaces for generation, embeddings and structure prediction.

Skill for Claude CodeCodex

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

Good fit Generating or completing protein sequences, creating variants, producing numerical representations of proteins, using hosted or local model inference, and predicting protein structures with ESMFold2.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/k-dense-ai/scientific-agent-skills/esm
About the project

Scientific Agent Skills is a collection of reusable procedures that give AI agents capabilities for scientific research across areas such as biology, chemistry, medicine, and drug discovery. It is used by researchers and by people building AI scientist workflows with compatible coding agents. The catalogue contains many of the project's skills and supporting instructions.

K-Dense-AI/scientific-agent-skills · 54,953 stars · on GitHub · arxiv.org

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/scientific-agent-skills --skill esm
Clone the repo
git clone --depth 1 https://github.com/K-Dense-AI/scientific-agent-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 esm

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/k-dense-ai/scientific-agent-skills/esm"><img src="https://agentmods.dev/badge/skills/k-dense-ai/scientific-agent-skills/esm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,558 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
  • Socket pass 2 Oct 2026
  • Snyk pass 2 Oct 2026
  • 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 $0.00056 $0.02558
Opus 5.5 $0.00022 $0.01023
Sonnet 5.5 $0.00011 $0.00512
Haiku 4.5 $0.00006 $0.00256

Measured 26d ago against content hash 49da3c6f5c81, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

esm 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 26d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/esm_embeddings.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.

Origin

Copies of this mod

5 near-identical copies found in the catalogue:

  • esm — 100% identical, 444 lines differ
  • esm — 100% identical, 444 lines differ
  • esm — 100% identical, 444 lines differ
  • esm — 86% identical, 432 lines differ
  • esm — 86% identical, 465 lines differ
skills/esm/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.

ESM: protein generation, embeddings, and folding

When to use

Use for Biohub's esm SDK: ESM3 masked multimodal generation, ESMC sequence representations, and ESMFold2 all-atom prediction. The former Forge platform migrated to https://biohub.ai, including ESM3; SDK class names still contain Forge. This skill targets the released esm 3.4.1.post1, verified against its wheel and current official documentation.

fair-esm is Meta's separate, older ESM2/ESMFold/ESM-IF distribution. Both packages import as esm; install them in separate environments. The legacy esm.pretrained.esm2_* interface is not the Biohub ESMC interface. Hugging Face Transformers' native ESMC implementation is another API: do not interchange its version requirements or output types with this SDK.

Setup and model choice

uv venv --python 3.12 .venv-esm
uv pip install --python .venv-esm/bin/python "esm==3.4.1.post1"

The release declares Python >=3.12, Torch >=2.11,<2.12 and Transformers

=4.57.6,<5. Python 3.12, Torch 2.11.0 and Transformers 4.57.6 were tested on CPU. Linux x86_64 installs include GPU-specific dependencies; use a supported inference machine and budget disk space. Flash Attention is optional; it is unnecessary for the tiny CPU tests. Do not install this stack into a shared environment containing incompatible Transformers or Torch pins.

Task Local model/API Hosted client/model
ESM3 sequence/structure/function generation ESM3.from_pretrained("esm3-sm-open-v1") client("esm3-medium-2024-08"); small/large IDs in the ESM3 reference
ESMC embeddings EsmcForMaskedLM and EsmcTokenizer; biohub/ESMC-300M, biohub/ESMC-600M, biohub/ESMC-6B esmc_client("esmc-600m-2024-12"); 300M/6B also documented
ESMFold2 all-atom structures EsmFold2Model, ESMFold2InputBuilder; biohub/ESMFold2 esmfold2_client("esmfold2-fast-2026-05")

ESMC 6B weights are now available locally. Current Biohub model cards identify MIT licensing, with ESMC cards also linking third-party notices; review the exact selected artifact's card and access requirements. The older ESMC class remains as a deprecated compatibility wrapper. Local model sizes, hosted availability and account quotas are different constraints; a larger model does not guarantee better performance on a particular assay.

Read the full file on GitHub · 215 lines

Files

What ships with it

7 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. 26d ago Changed · -140 lines · +17 tokens per session 49da3c6f5c81
  2. 27d ago Changed · +4 lines 58c52b114ac0
  3. 1mo ago Changed · +16 lines d71c806231ff
  4. 1mo ago First seen · 335 lines · 39 tokens per session scan A 439047e87cf7

Subscribe to this mod's changes

esm is a skill published in the GitHub repository K-Dense-AI/scientific-agent-skills (54,953 stars, last pushed yesterday), licensed MIT. It adds 56 tokens to every session and 2,558 once invoked, about $0.0002 per session on Opus 5.5. 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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