lit-schematic

82 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By wjgoarxiv/litgravity (GitHub) · coding · 167 stars · scanned at commit 53899d5

Draw a P&ID, PFD, equipment layout, journal apparatus figure or isometric cutaway as editable SVG with QA gate and 600 dpi PNG export. For real hardware and piping, not abstract diagrams.

Works with any agent that supports SKILL.md skills.

What this skill can do

Runs commands on your computer

This is disclosed by the author in the skill's SKILL.md or README. It runs automatically when the plugin is installed. Expected for a coding skill.

Found in 12 places.

plugin/skills/lit-schematic/scripts/motion.mjs, line 14import { spawnSync } from "node:child_process";
plugin/skills/lit-schematic/scripts/motion.mjs, line 36const result = spawnSync(bin, args, { encoding: "utf8", timeout: 600_000 });
plugin/skills/lit-schematic/scripts/render.mjs, line 13import { spawnSync } from "node:child_process";

Show 9 more

plugin/skills/lit-schematic/scripts/render.mjs, line 87const result = spawnSync(chrome, [...CHROME_FLAGS, `--user-data-dir=${profile}`, ...args, pathToFileURL(file).href], { encoding: "utf8", timeout: 180_000 });
plugin/hooks.json, line 6"command": "node ./hooks/session-start.mjs",
plugin/hooks.json, line 13"command": "node ./hooks/pre-invocation.mjs",
plugin/hooks.json, line 20"command": "node ./hooks/post-invocation.mjs",
plugin/hooks.json, line 27"command": "node ./hooks/stop.mjs",
plugin/hooks.json, line 37"command": "node ./hooks/pre-tool-use.mjs",
plugin/hooks.json, line 49"command": "node ./hooks/post-tool-use.mjs",
plugin/hooks/lib/rewind/collect.mjs, line 5import { execFileSync } from 'node:child_process';
plugin/hooks/lib/rewind/collect.mjs, line 63const defaultExec = (file, args, options) => execFileSync(file, args, { encoding: 'utf8', stdio: ['ignore', 'pipe', 'ignore'], ...options });

Downloads and installs other software

The author does not mention this. It runs automatically when the plugin is installed.

Found in 3 places.

plugin/skills/lit-schematic/scripts/motion.mjs, line 31ffmpeg: "macOS: brew install ffmpeg · Debian/Ubuntu: sudo apt install ffmpeg · Windows: winget install ffmpeg",
plugin/skills/lit-schematic/scripts/motion.mjs, line 32img2webp: "macOS: brew install webp · Debian/Ubuntu: sudo apt install webp · Windows: winget install Google.Libwebp",
plugin/hooks/session-start.mjs, line 38parts.push(`Update: LitGravity ${latest} is available (installed ${version}). Mention it once if the user asks about LitGravity; the update command is \`npx @li

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'lit-schematic' ] || [ -L ~/.agents/skills/'lit-schematic' ]; then echo 'A skill folder named lit-schematic already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/wjgoarxiv/litgravity' "$d" && git -C "$d" checkout --quiet '53899d5885b11bc5b687f17c21aae0e380549874' -- 'plugin/skills/lit-schematic' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugin/skills/lit-schematic' ~/.agents/skills/'lit-schematic' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'lit-schematic' ~/.claude/skills/'lit-schematic' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-10	`53899d5`	82
2026-11-07	`99d1012`	80