chromamark 0.1.3

ChromaMark for Python — render and build colored blocks, pills, collapsibles, fields, meters and inline diff on top of Markdown, with Jupyter display.

chromamark (Python)

Render and build ChromaMark from Python — colored blocks, pills, collapsible sections, fields, meters, and inline diff on top of Markdown (CommonMark + GFM). Produces the same HTML as the JS renderer, so the same theme applies, and it displays inline in Jupyter.

Built on markdown-it-py.

Install

pip install chromamark

Render

from chromamark import render, create_renderer

html = render("::: success\nAll good [!ok pass]\n:::")

# or as a markdown-it-py plugin:
from markdown_it import MarkdownIt
from chromamark import chromamark_plugin
md = MarkdownIt("commonmark").use(chromamark_plugin)

Build (fluent, for agent reports)

from chromamark import ChromaDoc

doc = ChromaDoc()
doc.heading("Deploy report")
doc.success("Deploy succeeded", "3/3 replicas healthy")
doc.fields(Region="eastus", Status=doc.pill("ok", "healthy"))
doc.table(["Stage", "Result"], [["unit", doc.pill("pass", "247")]])
print(doc.to_cm())     # ChromaMark source
print(doc.to_html())   # rendered HTML

Jupyter

from chromamark import display_chromamark
display_chromamark("::: success\nRun complete [=success 100%]\n:::")

ChromaDoc also renders itself in notebooks via _repr_html_.

A runnable, pre-executed example notebook lives at examples/chromamark_report.ipynb — it builds a model-evaluation report (colored block, pills, meters, fields, a table, and a collapsible) from computed results.

Parity with the JavaScript renderer

chromamark produces byte-identical HTML to @chromamark/renderer for normal content — verified by a differential harness over ~140,000 inputs (every ChromaMark construct, GFM, linkify, and the full SPEC/demo documents all match exactly). Three exotic edge cases differ, all involving unusual whitespace or non-BMP characters; none affect typical agent-generated reports:

• Non-ASCII whitespace at a block edge (e.g. a leading U+3000 ideographic space): JS markdown-it preserves it (asciiTrim); markdown-it-py strips all Unicode whitespace. Upstream base-engine difference.
• Six control/format code points inside ChromaMark constructs (U+001C–U+001F, U+0085 NEL, U+FEFF BOM): counted as whitespace by one engine's regex/strip but not the other, which can flip pill/field parsing.
• Astral-plane (emoji) domain labels in bare links (e.g. 🎉.com): auto-linked by JS linkify-it but not linkify-it-py. BMP and IDN letter hosts match.

Credits

Inline change-tracking syntax is adopted from CriticMarkup (© 2013 Gabe Weatherhead & Erik Hess, Apache-2.0); ChromaMark's parser is an original, independent implementation. See the main README for full credits.

License

Modified MIT License with a SaaS source-availability provision — see LICENSE.md.