rdkit-qsar-pharmacophore

rdkit-qsar-pharmacophore is a skill for Claude Code, Codex from YuliaNuzhnenko/bioinformatics-agent-skills. It costs 46 tokens per session (497 once invoked), scanned A, original, MIT.

A machine-learning workflow for predicting small-molecule drug activity from SMILES, a text format that describes chemical structures. It represents molecules as fingerprints, trains prediction models, and shows which chemical features influenced the results.

In plain words
What is it for?
Creating Morgan fingerprints, training LightGBM models to predict pIC50 activity values, and extracting SHAP explanations for the predictions.
Why use it?
It turns chemical structures into data that a model can compare, helping researchers build and interpret activity predictions.

Skill for Claude CodeCodex

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

Good fit Creating Morgan fingerprints, training LightGBM models to predict pIC50 activity values, and extracting SHAP explanations for the predictions.

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Install with agentmods
npx agentmods add skills/yulianuzhnenko/bioinformatics-agent-skills/rdkit-qsar-pharmacophore
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 YuliaNuzhnenko/bioinformatics-agent-skills --skill rdkit-qsar-pharmacophore
Clone the repo
git clone --depth 1 https://github.com/YuliaNuzhnenko/bioinformatics-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 rdkit-qsar-pharmacophore

README.md
[![agentmods](https://agentmods.dev/badge/skills/yulianuzhnenko/bioinformatics-agent-skills/rdkit-qsar-pharmacophore/github.svg)](https://agentmods.dev/skills/yulianuzhnenko/bioinformatics-agent-skills/rdkit-qsar-pharmacophore)
Your own site
<a href="https://agentmods.dev/skills/yulianuzhnenko/bioinformatics-agent-skills/rdkit-qsar-pharmacophore"><img src="https://agentmods.dev/badge/skills/yulianuzhnenko/bioinformatics-agent-skills/rdkit-qsar-pharmacophore/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 rdkit-qsar-pharmacophore

Your own site · 80×15
<a href="https://agentmods.dev/skills/yulianuzhnenko/bioinformatics-agent-skills/rdkit-qsar-pharmacophore"><img src="https://agentmods.dev/badge/skills/yulianuzhnenko/bioinformatics-agent-skills/rdkit-qsar-pharmacophore.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 497 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 $0.00046 $0.00497
Opus 5 $0.00023 $0.00249
Sonnet 5 $0.00009 $0.00099
Haiku 4.5 $0.00005 $0.00050

Measured 12d ago against content hash 5746ff270c42, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

rdkit-qsar-pharmacophore 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.

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/rdkit-qsar-pharmacophore/SKILL.md · 59 lines

What it actually says

Agent Skill: RDKit QSAR & Small-Molecule Bioactivity Skill

Domain Version

📌 Description

Computes 2048-bit ECFP4 Morgan fingerprints from SMILES, trains LightGBM regressors for pIC50 prediction, and extracts SHAP feature attributions.


🤖 Agent Execution Protocol

When an AI Agent is tasked with rdkit-qsar-pharmacophore:

  1. Input Validation: Verify that the required input files or coordinates are supplied.
  2. Environment Check: Ensure dependencies (RDKit, LightGBM, SHAP, Scikit-Learn) are installed.
  3. Execution: Run the protocol pipeline snippet below.
  4. Output Generation: Produce actionable Markdown/JSON summaries with publication figures.

💻 Protocol Code Snippet

from rdkit import Chem
from rdkit.Chem import AllChem

def get_ecfp4(smiles):
    mol = Chem.MolFromSmiles(smiles)
    return list(AllChem.GetMorganFingerprintAsBitVect(mol, 2, nBits=2048)) if mol else None


📥 Input & Output Specifications

Input Contract

  • Target Files: Valid input data matching domain formats.
  • Parameters: Quality thresholds and cutoffs.

Output Contract

  • Results Table: Structured summary dataframe or matrix.
  • Visualization: Rendered SVG/PNG figures.

📄 License

Distributed under the MIT License. See LICENSE for details.

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 · 59 lines · 46 tokens per session scan A 5746ff270c42

Subscribe to this mod's changes

rdkit-qsar-pharmacophore is a skill published in the GitHub repository YuliaNuzhnenko/bioinformatics-agent-skills (9 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 497 once invoked, about $0.0002 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 2026-08-31.

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