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Updated 1d ago

by jgassens

ChemDraft

Open-source chemical drawing app for macOS and Windows, with plugins and AI-agent tools (MCP server, CLI, agent skill)

  • Active — Updated in the last 14 days
View on GitHub (opens in a new tab)

46 GitHub stars (46)

+36 in 8 days

Stars gained per day · daily snapshots since Oct 23
Stars gained per day, Oct 23 to Oct 31: +36 in total; the busiest day was Oct 30 with +22 stars.Oct 24: +1 starsOct 25: +2 starsOct 26: 0 starsOct 27: 0 starsOct 28: 0 starsOct 29: +8 starsOct 30: +22 starsOct 31: +3 stars
Stars gained between daily snapshots
PeriodNew stars
Oct 24+1
Oct 25+2
Oct 260
Oct 270
Oct 280
Oct 29+8
Oct 30+22
Oct 31+3
  • 1 skill (1 skills found in its SKILL.md files)
  • 13 forks (13 forks)
  • 1d ago last update (Last updated 1d ago)

Install

Skills CLI

npx skills add jgassens/ChemDraft

Asks which agents to install it for. Add -g to install it for every project.

Claude Code

git clone https://github.com/jgassens/ChemDraftcp -r "ChemDraft/skills/chemdraft" ~/.claude/skills/

Copies the chemdraft skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project).

Plugin

/plugin marketplace add jgassens/ChemDraft

Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.

Skills can run code on your machine — read the SKILL.md first.

What it does

In the author's own words, from each skill's SKILL.md.

  • chemdraft

    Use ChemDraft to draw or show molecules; make structure images for documents, exams, slides and handouts, multiple-choice structure grids and reaction schemes; convert chemical names to structures; answer R/S and E/Z questions; compute molecular properties including formula, exact and average mass, m/z, isotope patterns, logP, TPSA, pKa and the property suite; predict NMR shifts; export CDXML, SD…

    skills/chemdraft/SKILL.md on GitHub (opens in a new tab)

Review before you install

A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.