Prepare, validate, run, resume, troubleshoot, and analyze GROMACS molecular dynamics.

Custom licenceAuto-check passedResearch & Science

Install Gromacs

skills CLI
$ npx skills add JCLiuGroup/AI-Computational-Chemist --skill gromacs -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install JCLiuGroup/AI-Computational-Chemist gromacs --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/JCLiuGroup/AI-Computational-Chemist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/tools/gromacs .claude/skills/gromacs && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
gromacs
GitHub stars
146
Used in
1 other repo
Token cost
~1.7k tokens
SKILL.md length
724 words
Files
17 (incl. scripts, references)
Skills in repo
21
Repo updated
First seen
Licence
Custom licence

At a glance

Prepare, validate, run, resume, troubleshoot, and analyze GROMACS molecular dynamics.

  • Works in 10 steps: Inspect the structure before converting.… → Choose one coherent parameter family.… → Build the system. Generate topology,… → …
  • Biomolecular and molecular-condensed-phase classical MD
  • SKILL.md covers Required inputs, Where to find what, Workflow and Hard guardrails
  • Runs Python scripts from its folder; calls python

What it does

Gromacs is an agent skill from JCLiuGroup/AI-Computational-Chemist. Prepare, validate, run, resume, troubleshoot, and analyze GROMACS molecular dynamics. Use for biomolecular and molecular-condensed-phase classical MD; PDB/GRO/ITP/TOP/MDP/TPR workflows; force-field/topology integration; EM/NVT/NPT/production; checkpoint continuation; PBC repair; RMSD/RMSF/RDF/MSD/SASA/hydrogen-bond/density/membrane analysis; and VMD handoff.

Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 19 other files, including scripts and reference files (for example `examples/README.md`, `references/analysis.md` and `references/biomolecules.md`).

It sits in Research & Science, covering Physical and earth sciences.

When your agent uses it

  • Biomolecular and molecular-condensed-phase classical MD
  • PDB/GRO/ITP/TOP/MDP/TPR workflows
  • Force-field/topology integration
  • EM/NVT/NPT/production

Example prompts

  • “/gromacs”

Requirements

  • Python 3

Workflow steps

10 steps, taken from the first numbered list in SKILL.md.

  1. Inspect the structure before converting. Resolve alternate locations/models, missing atoms/residues, protonation, termini, special bonds…
  2. Choose one coherent parameter family. Record force field, water/ion model, ligand parameter source, charge method and every compatibility…
  3. Build the system. Generate topology, define the box, add solvent/ions/other components, and make coordinate order match [ molecules ]…
  4. Static preflight. Run the checker; then run gmx grompp -pp processed.top -po mdout.mdp and inspect warnings, processed topology and actual…
  5. Energy minimize. Validate finite energy, convergence criterion and absence of severe clashes.
  6. Equilibrate in explicit stages. Stabilize temperature, then pressure/density/box as required, with restraints reduced according to a…
  7. Production. Continue from checkpoint/state, do not regenerate velocities, and preserve raw outputs.
  8. Validate technically and scientifically. A clean mdrun is not evidence of equilibration or adequate sampling.
  9. Derive analysis-specific trajectories. Keep the raw trajectory immutable; make separate whole/centered/fitted/unwrapped copies for…
  10. Report provenance: force field, water/ions, topology sources, GROMACS version, full .mdp, equilibration cut, production interval…

What it can do on your machine

Read from SKILL.md and the folder at commit e27b555. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 2 files in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Gromacs loads about 1.7k tokens when it runs, and up to ~17k if it reads all its reference files. Until then it costs about 92 tokens; SKILL.md has 724 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~92
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~17k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 724 words (~1,711 tokens).

“GROMACS owns the code-specific path for classical molecular dynamics: build a chemically and topologically consistent system, compile each stage with gmx grompp, run with gmx mdrun, validate every stage, and analyze only verified production segments. Tool-agnostic force-field and sampling science…”

— opening of SKILL.md by JCLiuGroup, Custom licence
name
gromacs

Read the full SKILL.md on GitHub

Files

SKILL.md and 16 other files (scripts, references) in tools/gromacs of JCLiuGroup/AI-Computational-Chemist.

  • SKILL.md
  • examples/README.md
  • references/analysis.md
  • references/biomolecules.md
  • references/errors.md
  • references/ligands-small-molecules.md
  • references/liquids-interfaces.md
  • references/mdp-options.md
  • references/membranes.md
  • references/resources.md
  • references/running.md
  • references/system-preparation.md
  • references/topology-and-force-fields.md
  • references/validation.md
  • references/vmd-handoff.md
  • scripts/check_gromacs_inputs.py
  • scripts/parse_gromacs_log.py

Open the folder on GitHubat commit e27b555

Used in 1 other repository

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in JCLiuGroup/AI-Computational-Chemist, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Gromacs next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Gromacs compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Gromacs this skillJCLiuGroup/AI-Computational-Chemist1461 repos~1.7kAutomated safety check: PassCustom licence
AstropyzLanqing/codex-claude-academic-skills4.7k13 repos~2.9kAutomated safety check: PassBSD-3-Clause
PymatgenzLanqing/codex-claude-academic-skills4.7k11 repos~5kAutomated safety check: PassMIT
Cantera Ignition DelayK-Dense-AI/scientific-agent-skills48k1 repos~2.2kAutomated safety check: PassMIT
Weathertrpc-group/trpc-agent-go1.9k8 repos~591Automated safety check: PassApache-2.0
Pymol VisualizationChatMol/ChatMol373—~1.2kAutomated safety check: PassMIT

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Questions about Gromacs

What does Gromacs do?

Prepare, validate, run, resume, troubleshoot, and analyze GROMACS molecular dynamics. Gromacs is an agent skill from JCLiuGroup/AI-Computational-Chemist. Prepare, validate, run, resume, troubleshoot, and analyze GROMACS molecular dynamics.

When should I use Gromacs?

Gromacs fits situations like: biomolecular and molecular-condensed-phase classical MD; PDB/GRO/ITP/TOP/MDP/TPR workflows; force-field/topology integration; EM/NVT/NPT/production.

How do I install Gromacs in Claude Code?

Run `npx skills add JCLiuGroup/AI-Computational-Chemist --skill gromacs -a claude-code`. Or copy the skill folder (tools/gromacs in JCLiuGroup/AI-Computational-Chemist) into .claude/skills/gromacs in your project. Claude Code loads it when a task matches its description.

How do I install Gromacs in Codex?

Run `npx skills add JCLiuGroup/AI-Computational-Chemist --skill gromacs -a codex`. Or copy the skill folder (tools/gromacs in JCLiuGroup/AI-Computational-Chemist) into .agents/skills/gromacs in your project. Codex loads it when a task matches its description.

Can I use Gromacs in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add JCLiuGroup/AI-Computational-Chemist --skill gromacs -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gromacs, .gemini/skills/gromacs, .github/skills/gromacs and .opencode/skills/gromacs in your project.

What does Gromacs need to run?

Going by SKILL.md and its folder, Gromacs needs Python for the scripts in its folder and the command-line tools its instructions call (python). Our summary lists: Python 3.

Does Gromacs access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Gromacs safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Gromacs use?

Gromacs has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Gromacs use?

About 1.7k tokens (SKILL.md is roughly 6.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 16k tokens, read only when the agent opens those files.

What are the alternatives to Gromacs?

Skills that share tags, products or a category with Gromacs: Astropy (zLanqing/codex-claude-academic-skills, 4.7k stars), Pymatgen (zLanqing/codex-claude-academic-skills, 4.7k stars), Cantera Ignition Delay (K-Dense-AI/scientific-agent-skills, 48k stars) and Weather (trpc-group/trpc-agent-go, 1.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Gromacs?

JCLiuGroup (a GitHub organization) maintains it in JCLiuGroup/AI-Computational-Chemist, which has 146 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on September 27, 2026.

Source: JCLiuGroup/AI-Computational-Chemist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.