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by Qizhan7
文具盒 · hand-built drawing skills (crayon, pen & wash) by 盏 & North — every stroke drawn in Python, no filters, no image generation
# Add to your Claude Code skills
git clone https://github.com/Qizhan7/pencil-caseSee how pencil-case compares with popular alternatives.
pencil-case is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by Qizhan7. 文具盒 · hand-built drawing skills (crayon, pen & wash) by 盏 & North — every stroke drawn in Python, no filters, no image generation. It has 50 GitHub stars.
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Clone the repository with "git clone https://github.com/Qizhan7/pencil-case" and add it to your Claude Code skills directory (see the Installation section above).
pencil-case is primarily written in Python. It is open-source under Qizhan7 on GitHub, so you can review or fork the full source.
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盏和 North 一起做的画画 skill。全部是 Python 一笔一笔画出来的——不是滤镜，不是生图模型。
一张画几万到一百多万笔，每一笔都是一句 draw.line / draw.ellipse，这是它和生图的分界线。
Hand-built drawing skills for Claude Code (or any Python). Every stroke is drawn in code — no filters, no image generation. Made by 盏 (Sienna Qi) & North, her AI partner. Chinese docs inside each skill; the code and parameters speak for themselves.
| skill | 一句话 | 起手 |
|---|---|---|
crayon/ 蜡笔 |
油画棒质感：每笔一条短线，沿线撒带毛边的颗粒；楼歪着盖、字一个一个歪着写、指线弯的带圈 | python3 crayon/example_street.py |
penwash/ 钢笔淡彩 |
米色纸上细钢笔线抖着走、暗部排线、几块水彩故意不贴线、大片留白；能把作画过程录成视频 | python3 penwash/example.py |
以后新做的 skill 也往这个盒子里放。
pip install pillow numpy
git clone https://github.com/Qizhan7/pencil-case
python3 pencil-case/crayon/example_street.py # → crayon/example_street.png，和仓库里那张一模一样
python3 pencil-case/penwash/example.py # → penwash/example.png
跑出来的图和仓库里的例图逐像素一致（seed 固定）——一致就说明环境对了。
Claude Code 用户：把 crayon/ 和 penwash/ 两个目录整个放进 ~/.claude/skills/，然后直接说「画成蜡笔风」「画个钢笔淡彩」就能叫出来。每个目录里的 SKILL.md 是完整的方法：引擎函数表、参数手感、按材质的技法、踩过的坑。
其他环境：脚本里 sys.path.insert(0, "<目录>") 之后 import crayon_lib / import penwash_lib 就行，没有别的依赖。中文手写字体会自动找（macOS 娃娃体 → 苹方 → Noto CJK → PIL 默认），想指定就改 C.FONT_CJK / P.FONT。
这两种画法，照着描是画不出来的。对着照片画，一定会画规整、会把照片里所有东西都搬进来，出来的是插图，不是这个风格；照着例图改两个坐标换个颜色，出来的是同一张画换了个壳。所以收到照片先写下它是关于什么、只留三样东西、构图自己定；别人的画只借线的抖法和颗粒粗细。两份 SKILL.md 开头都把这条讲透了——照它走，第一张就是自己的。
作者：盏 (Sienna Qi) & North。 许可：PolyForm Noncommercial 1.0.0——对所有非商业用途开源，学、用、改、转发都可以；商业用途请先联系作者取得授权。 版权 © 2026 Sienna Qi (戚盏)。