vasp-workflow

vasp-workflow is a skill for Claude Code, Codex from SFETNI/Deep-Matter-Chem-Skills. It costs 4 tokens per session (5,953 once invoked), scanned A, original, MIT.

An end-to-end workflow for VASP 6, a scientific program that uses density functional theory to calculate how electrons behave in materials. It covers preparing inputs, convergence tests, production calculations, analysis, debugging, and reference data for machine-learning potentials.

In plain words
What is it for?
Use it to set up and run electronic-structure calculations, test numerical convergence, analyze results, debug failed jobs, and generate data for machine-learning models of atomic interactions.
Why use it?
It provides the checks and settings needed to make material simulations reliable, including testing energy cutoffs and Brillouin-zone sampling instead of assuming defaults are accurate.

Skill for Claude CodeCodex

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

Good fit Use it to set up and run electronic-structure calculations, test numerical convergence, analyze results, debug failed jobs, and generate data for machine-learning models of atomic interactions.

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Install with agentmods
npx agentmods add skills/sfetni/deep-matter-chem-skills/vasp-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 vasp-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 vasp-workflow

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/sfetni/deep-matter-chem-skills/vasp-workflow"><img src="https://agentmods.dev/badge/skills/sfetni/deep-matter-chem-skills/vasp-workflow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 4 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,953 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 $0.00004 $0.05953
Opus 5 $0.00002 $0.02976
Sonnet 5 $0.00001 $0.01191
Haiku 4.5 $0.00000 $0.00595

Measured 12d ago against content hash 555f2af737ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

vasp-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/electronic-structure/vasp-workflow/SKILL.md · 386 lines

How it starts

The opening of the file, as written. The whole thing — 386 lines — stays where its author put it; the contents beside it link to each section on GitHub.

VASP Workflow

Description

This skill covers end-to-end DFT calculations using VASP 6, from input file construction through convergence testing to production runs. It is the entry point for electronic structure work and the primary source of training data for ML interatomic potentials. Invoke this skill when an agent needs to set up, run, analyze, or debug a VASP calculation, or when generating DFT reference data for downstream tasks.

Domain Context

VASP solves the Kohn-Sham equations of density functional theory on a plane-wave basis set with PAW (Projector Augmented Wave) pseudopotentials. The key approximation is the exchange-correlation functional: it captures electron-electron interactions beyond the Hartree level, but no functional is exact for all systems.

Core assumptions that must be understood before using this workflow:

  • Plane-wave basis convergence: The basis set size is controlled by ENCUT (cutoff energy in eV). Increasing ENCUT systematically improves completeness until results converge. The PAW potential files specify a recommended ENCUT; production runs should test convergence above this value.
  • Brillouin zone sampling: The k-point mesh controls sampling of reciprocal space. Metals require denser meshes than insulators due to Fermi surface features. Convergence is material-dependent.
  • Pseudopotential choice: VASP ships multiple PAW datasets per element (e.g., Fe, Fe_pv, Fe_sv). The choice affects which electrons are treated as valence, with direct consequences for accuracy and cost.
  • Exchange-correlation functional: PBE systematically underestimates band gaps and over-delocalizes d/f electrons. PBEsol corrects surface energies. SCAN is more accurate for many systems but harder to converge. HSE06 opens band gaps but is far more expensive. DFT+U is empirical but fast.
  • Spin polarization: Magnetic systems require ISPIN=2 and careful MAGMOM initialization. Omitting spin polarization in Fe, Co, Ni, or Mn-containing systems will produce wrong energies.
  • Periodic boundary conditions: VASP assumes 3D periodicity. Surfaces, defects, and molecules require appropriate vacuum spacing and dipole corrections.

Read the full file on GitHub · 386 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 · 386 lines · 4 tokens per session scan A 555f2af737ff

Subscribe to this mod's changes

vasp-workflow is a skill published in the GitHub repository SFETNI/Deep-Matter-Chem-Skills (6 stars, last pushed 1mo ago), licensed MIT. It adds 4 tokens to every session and 5,953 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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