foldseek

foldseek is a skill for Claude Code, Codex from zongtingwei/Bioclaw_Skills_Hub. It costs 101 tokens per session (1,485 once invoked), scanned A, original, MIT.

A structure-prediction tool for checking how a designed protein folds on its own or when joined to another protein.

In plain words
What is it for?
Validating protein sequences, predicting protein complexes, and filtering designs before further testing.
Why use it?
It helps test whether a designed sequence is likely to form the intended structure and provides confidence scores for the prediction.

Skill for Claude CodeCodex

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

Good fit Validating protein sequences, predicting protein complexes, and filtering designs before further testing.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/zongtingwei/bioclaw_skills_hub/foldseek
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 zongtingwei/Bioclaw_Skills_Hub --skill foldseek
Clone the repo
git clone --depth 1 https://github.com/zongtingwei/Bioclaw_Skills_Hub

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 foldseek

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/zongtingwei/bioclaw_skills_hub/foldseek"><img src="https://agentmods.dev/badge/skills/zongtingwei/bioclaw_skills_hub/foldseek.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,485 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 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 $0.00101 $0.01485
Opus 5 $0.00051 $0.00743
Sonnet 5 $0.00020 $0.00297
Haiku 4.5 $0.00010 $0.00148

Measured 12d ago against content hash b46ae3860726, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

foldseek scanned grade A with 2 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.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X POST "https://search.foldseek.com/api/ticket" \

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

subprocess.run([
skills/protein-design/skills/foldseek/SKILL.md · 196 lines

How it starts

The opening of the file, as written. The whole thing — 196 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prerequisites

Requirement Minimum Recommended
Python 3.8+ 3.10
RAM 8GB 16GB
Disk 10GB 50GB (for local databases)

How to run

Note: Foldseek can run locally or via web server. No GPU required.

Option 1: Web Server (Quick; rate-limited, use sparingly)

# Upload structure to web server
curl -X POST "https://search.foldseek.com/api/ticket" \
  -F "[email protected]" \
  -F "database[]=afdb50" \
  -F "database[]=pdb100"

Option 2: Local installation

# Install Foldseek
conda install -c conda-forge -c bioconda foldseek

# Search PDB
foldseek easy-search query.pdb /path/to/pdb100 results.m8 tmp/

# Search AlphaFold DB
foldseek easy-search query.pdb /path/to/afdb50 results.m8 tmp/

Option 3: Python API

import subprocess
import pandas as pd

def foldseek_search(query_pdb, database, output="results.m8"):
    """Run Foldseek search."""
    subprocess.run([
        "foldseek", "easy-search",
        query_pdb, database, output, "tmp/",
        "--format-output", "query,target,pident,alnlen,evalue,bits"
    ])
    return pd.read_csv(output, sep="\t",
                       names=["query", "target", "pident", "alnlen", "evalue", "bits"])

Key parameters

Parameter Default Description
--min-seq-id 0.0 Minimum sequence identity
-e 0.001 E-value threshold
--alignment-type 2 0=3Di, 1=TM, 2=3Di+AA
--max-seqs 300 Max hits to pass through prefilter; reducing this affects sensitivity

Databases

Database Description Size
pdb100 PDB clustered at 100% ~200K structures
afdb50 AlphaFold DB at 50% ~67M structures
swissprot SwissProt structures ~500K structures
cath50 CATH domains ~50K domains

Output format

# results.m8 (tabular)
query   target          pident  alnlen  evalue  bits
query   1abc_A          85.2    120     1e-45   180.5
query   2def_B          72.1    115     1e-32   145.2

Read the full file on GitHub · 196 lines

Files

What ships with it

1 file 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 · 196 lines · 101 tokens per session scan A b46ae3860726

Subscribe to this mod's changes

foldseek is a skill published in the GitHub repository zongtingwei/Bioclaw_Skills_Hub (26 stars, last pushed 5mo ago), licensed MIT. It adds 101 tokens to every session and 1,485 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 2 findings (makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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