@tufte/chart-cli

Render chart blocks to Tufte-style ASCII — from the command line. Two modes.

npm install -g @tufte/chart-cli

Pre-render markdown in place

Find every ```chart block in a file, render it, and embed the result (with its source) back into the document. Idempotent — safe to run in a pre-commit hook or CI so committed markdown shows real charts everywhere, no plugin required.

chart render README.md --write

Without --write, the rendered document is printed to stdout. Inline sparklines (a one-backtick `sparkline: 12 24 36` span) are baked too, into a recoverable one-line carrier so the source survives.

Pipe a spec

printf 'line "Latency"\n0:00, 22\n8:00, 68\n12:00, 110\n' | chart

prints the chart to stdout.

Ecosystem

• @tufte/chart-core — the renderer + format spec
• @tufte/markdown-it-chart — markdown-it plugin
• @tufte/remark-chart — remark/unified plugin