computational-chemistry-workflow

computational-chemistry-workflow is a skill for Claude Code, Codex from SFETNI/Deep-Matter-Chem-Skills. It costs 7 tokens per session (8,749 once invoked), scanned A, original, MIT.

A workflow for using quantum chemistry calculations to study molecules, chemical reactions, and molecular materials. It uses ORCA for detailed calculations and xTB for faster early checks.

In plain words
What is it for?
Use it to prepare structures, optimize geometries, study reaction paths, choose and compare calculation methods, model solvents, and connect results to molecular prediction tools.
Why use it?
It organizes the many choices and steps needed to estimate molecular shapes, energies, reaction barriers, heat-related values, spectra, and other properties from basic physical models.

Skill for Claude CodeCodex

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

Good fit Use it to prepare structures, optimize geometries, study reaction paths, choose and compare calculation methods, model solvents, and connect results to molecular prediction tools.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sfetni/deep-matter-chem-skills/computational-chemistry-workflow
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 SFETNI/Deep-Matter-Chem-Skills --skill computational-chemistry-workflow
Clone the repo
git clone --depth 1 https://github.com/SFETNI/Deep-Matter-Chem-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 computational-chemistry-workflow

README.md
[![agentmods](https://agentmods.dev/badge/skills/sfetni/deep-matter-chem-skills/computational-chemistry-workflow/github.svg)](https://agentmods.dev/skills/sfetni/deep-matter-chem-skills/computational-chemistry-workflow)
Your own site
<a href="https://agentmods.dev/skills/sfetni/deep-matter-chem-skills/computational-chemistry-workflow"><img src="https://agentmods.dev/badge/skills/sfetni/deep-matter-chem-skills/computational-chemistry-workflow/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 computational-chemistry-workflow

Your own site · 80×15
<a href="https://agentmods.dev/skills/sfetni/deep-matter-chem-skills/computational-chemistry-workflow"><img src="https://agentmods.dev/badge/skills/sfetni/deep-matter-chem-skills/computational-chemistry-workflow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 7 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,749 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 $0.00007 $0.08749
Opus 5 $0.00003 $0.04374
Sonnet 5 $0.00001 $0.01750
Haiku 4.5 $0.00001 $0.00875

Measured 12d ago against content hash ae1827cfb830, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

computational-chemistry-workflow 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/computational-chemistry/computational-chemistry-workflow/SKILL.md · 510 lines

How it starts

The opening of the file, as written. The whole thing — 510 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Computational Chemistry Workflow

Description

This skill covers end-to-end quantum chemistry workflows for molecules, reactions, and molecular materials: structure preparation and standardization; geometry optimization; frequency analysis and thermochemistry; transition-state search and reaction-profile construction; method and basis-set selection and benchmarking; solvation modeling; open-shell and multireference diagnostics; excited-state calculations; and coupling to molecular featurization, property prediction, and surrogate-model pipelines. Primary backends are ORCA for DFT and post-HF calculations and xTB for fast semiempirical pre-screening and conformer ranking. Invoke this skill when an agent needs to compute molecular geometries, energies, reaction barriers, thermochemical corrections, spectra, or molecular properties from first principles.

Domain Context

Quantum chemistry describes molecular electronic structure by solving approximations to the electronic Schrödinger equation. The accuracy of any prediction depends on three choices that must be made consistently: the electronic structure method (how electron correlation is treated), the basis set (how atomic orbitals are represented), and the molecular model (charge, multiplicity, conformer, solvent environment). Getting any one wrong can produce qualitatively incorrect results regardless of compute time spent.

The method–accuracy–cost ladder (approximate, molecule-dependent):

Tier Representative methods Formal cost scaling Typical use
Force-field / classical MMFF94, UFF, GAFF O(N) Conformer search, crude geometry seed
Semiempirical tight-binding GFN2-xTB, GFN1-xTB, PM7 O(N²–N³) Large-scale conformer ranking, pre-screening
Pure DFT / HF PBE, BLYP, HF O(N³–N⁴) Fast DFT for large systems; limited accuracy
Hybrid DFT B3LYP, PBE0, M06-2X, ωB97X-D O(N³–N⁴) Mainstream molecular energetics and geometries
Double-hybrid DFT B2PLYP, DLPNO-B2PLYP, ωB97M(2) O(N⁵) High-accuracy energetics; challenging cases
MP2 / SCS-MP2 MP2, RI-MP2, SCS-MP2 O(N⁵) Post-HF baseline; poor for MR or open-shell
Coupled cluster CCSD, CCSD(T), DLPNO-CCSD(T) O(N⁶–N⁷) Benchmark quality; DLPNO makes it feasible
Composite methods G4, W1, CBS-QB3, ONIOM Problem-dependent Thermochemical accuracy (ΔH < 1 kcal/mol)

Read the full file on GitHub · 510 lines

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 · 510 lines · 7 tokens per session scan A ae1827cfb830

Subscribe to this mod's changes

computational-chemistry-workflow is a skill published in the GitHub repository SFETNI/Deep-Matter-Chem-Skills (6 stars, last pushed 1mo ago), licensed MIT. It adds 7 tokens to every session and 8,749 once invoked, about $0.0000 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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