markco.dev — Sandbox

mrmd

Runtimes

No running runtimes

Environment

Artifacts

Use html:name, css:name, js:name cells to create artifacts

Source

Press F12 on a symbol to view its source code.

Help

Keyboard Shortcuts

Run cell Ctrl+Enter

Run all cells Ctrl+Shift+Enter

Open file Ctrl+P

Toggle rail Ctrl+\

Tips

Use ```python to create code cells

Click the play button to run code

JavaScript Imports

JS cells run as scripts (eval context), so use await import(...) instead of import ... from ....

For cross-cell reuse, assign package handles to globals (example: d3 = await ...).

Reusable Package Loader

Runtimes Configuration

Configure named runtime sessions in your document's YAML frontmatter using the session key.

Example Frontmatter

---
session:
  python:
    name: python-env
    venv: .venv
  bash:
    name: bash-session
    cwd: /tmp
  node:
    name: node-backend
    cwd: ./backend
  julia:
    name: julia-session
    cwd: /tmp
  r:
    name: r-session
    cwd: /tmp
---

name — display name for the session
venv — Python virtual environment path (Python only)
cwd — working directory for the runtime

Settings

Appearance

Theme github

AI Commands

Quality Shift+1-5

Reasoning 0-5

Text

g Fix Grammar selection

t Fix Transcription selection

s Complete Sentence cursor

p Complete Paragraph cursor

Code

l Complete Line cursor

c Complete Section cursor

d Add Docstrings selection

y Add Type Hints selection

n Improve Names selection

r Refactor Code selection

Document

o Continue Document append

Comments

m Address Nearby cursor

M Address All document

Open Jupyter Notebook