Jupyter Notebook Skill

Create clean, reproducible Jupyter notebooks for two primary modes:

• Experiments and exploratory analysis
• Tutorials and teaching-oriented walkthroughs

Prefer the bundled templates and the helper script for consistent structure and fewer JSON mistakes.

When to use

• Create a new .ipynb notebook from scratch.
• Convert rough notes or scripts into a structured notebook.
• Refactor an existing notebook to be more reproducible and skimmable.
• Build experiments or tutorials that will be read or re-run by other people.

Decision tree

• If the request is exploratory, analytical, or hypothesis-driven, choose experiment.
• If the request is instructional, step-by-step, or audience-specific, choose tutorial.
• If editing an existing notebook, treat it as a refactor: preserve intent and improve structure.

Skill path (set once)

export CODEX_HOME="${CODEX_HOME:-$HOME/.codex}"
export JUPYTER_NOTEBOOK_CLI="$CODEX_HOME/skills/jupyter-notebook/scripts/new_notebook.py"

User-scoped skills install under $CODEX_HOME/skills (default: ~/.codex/skills).

Workflow

1. Lock the intent. Identify the notebook kind: experiment or tutorial. Capture the objective, audience, and what "done" looks like.

2. Scaffold from the template. Use the helper script to avoid hand-authoring raw notebook JSON.

uv run --python 3.12 python "$JUPYTER_NOTEBOOK_CLI" \
  --kind experiment \
  --title "Compare prompt variants" \
  --out output/jupyter-notebook/compare-prompt-variants.ipynb

uv run --python 3.12 python "$JUPYTER_NOTEBOOK_CLI" \
  --kind tutorial \
  --title "Intro to embeddings" \
  --out output/jupyter-notebook/intro-to-embeddings.ipynb

3. Fill the notebook with small, runnable steps. Keep each code cell focused on one step. Add short markdown cells that explain the purpose and expected result. Avoid large, noisy outputs when a short summary works.

4. Apply the right pattern. For experiments, follow references/experiment-patterns.md. For tutorials, follow references/tutorial-patterns.md.

5. Edit safely when working with existing notebooks. Preserve the notebook structure; avoid reordering cells unless it improves the top-to-bottom story. Prefer targeted edits over full rewrites. If you must edit raw JSON, review references/notebook-structure.md first.

6. Validate the result. Run the notebook top-to-bottom when the environment allows. If execution is not possible, say so explicitly and call out how to validate locally. Use the final pass checklist in references/quality-checklist.md.

Templates and helper script

• Templates live in assets/experiment-template.ipynb and assets/tutorial-template.ipynb.
• The helper script loads a template, updates the title cell, and writes a notebook.

Script path:

• $JUPYTER_NOTEBOOK_CLI (installed default: $CODEX_HOME/skills/jupyter-notebook/scripts/new_notebook.py)

Temp and output conventions

• Use tmp/jupyter-notebook/ for intermediate files; delete when done.
• Write final artifacts under output/jupyter-notebook/ when working in this repo.
• Use stable, descriptive filenames (for example, ablation-temperature.ipynb).

Dependencies (install only when needed)

Prefer uv for dependency management.

Optional Python packages for local notebook execution:

uv pip install jupyterlab ipykernel

The bundled scaffold script uses only the Python standard library and does not require extra dependencies.

Environment

No required environment variables.

Reference map

• references/experiment-patterns.md: experiment structure and heuristics.
• references/tutorial-patterns.md: tutorial structure and teaching flow.
• references/notebook-structure.md: notebook JSON shape and safe editing rules.
• references/quality-checklist.md: final validation checklist.

VitePress is a Static Site Generator (SSG) built on Vite and Vue 3. It takes Markdown content, applies a theme, and generates static HTML that becomes an SPA for fast navigation. Perfect for documentation, blogs, and marketing sites.

Key Characteristics:

• File-based routing with .md files
• Vue components work directly in Markdown
• Fast HMR with instant updates (<100ms)
• Default theme optimized for documentation
• Built-in search (local or Algolia)

Before working with VitePress projects:

• Check .vitepress/config.ts for site configuration
• Look at .vitepress/theme/ for custom theme extensions
• The public/ directory contains static assets served as-is

The skill is based on VitePress 1.x, generated at 2026-01-28.

Core

Topic	Description	Reference
Configuration	Config file setup, defineConfig, site metadata	core-config
CLI	Command-line interface: dev, build, preview, init	core-cli
Routing	File-based routing, source directory, rewrites	core-routing
Markdown	Frontmatter, containers, tables, anchors, includes	core-markdown

Features

Code & Content

Topic	Description	Reference
Code Blocks	Syntax highlighting, line highlighting, diffs, focus	features-code-blocks
Vue in Markdown	Components, script setup, directives, templating	features-vue
Data Loading	Build-time data loaders, createContentLoader	features-data-loading
Dynamic Routes	Generate pages from data, paths loader files	features-dynamic-routes

Theme

Topic	Description	Reference
Theme Config	Nav, sidebar, search, social links, footer	theme-config
Customization	CSS variables, slots, fonts, global components	theme-customization
Custom Theme	Building themes from scratch, theme interface	theme-custom

Advanced

Topic	Description	Reference
Internationalization	Multi-language sites, locale configuration	advanced-i18n
SSR Compatibility	Server-side rendering, ClientOnly, dynamic imports	advanced-ssr

Recipes

Topic	Description	Reference
Deployment	GitHub Pages, Netlify, Vercel, Cloudflare, Nginx	recipes-deploy