Unfragile

The request asks what to use for source highlighting. Pygments is a generic syntax highlighter usable as a command-line tool and as a library 4, and Beautifier offers an online JavaScript beautifier with CodeMirror syntax highlighting 8. Other candidates shown do not clearly provide source-code highlighting from their sources.

1
Pygmentspygments.orgverified and signed
A generic syntax highlighter for source code that supports 602 languages and outputs HTML, RTF, LaTeX and ANSI sequences, usable as a command-line tool and as a library 4.
Website Docs
for agents: highlighting · syntax
2
Beautifierbeautifier.iowebsite read, tools not yet checked
An online JavaScript beautifier that uses the CodeMirror syntax highlighting editor, also available as a command-line version, Python library and Node package 8.
Website
+3 community tools built for it

Sources

4Welcome! — Pygmentspygments.org · read 2026-10-29
8Online JavaScript beautifierbeautifier.io · read 2026-10-29

For agents: the 10 actions behind this answer

PostSourcesSource · Stripe API verified and signed
Update a source
find-untested-sources · find-untested-sources verified and signed
MANDATORY for static source-to-test pairing: find or list source files/modules without corresponding tests, or suggest test locations from repository structure. Invoke even for a tiny package; do not substitute manual globbing. Uses Roslyn for C#/.NET and tree-sitter for Python, TS/JS, Go, Java, Rus
react19-source-patterns · react19-source-patterns verified and signed
Reference for React 19 source-file migration patterns, including API changes, ref handling, and context updates.
highlighting · Pygments verified and signed
cloudflare-images-sourcingkit-get-source · Cloudflare API verified and signed
Get sourcing kit source
python · fastcore verified and signed
docker-sandboxes-env · docker-sandboxes-env verified and signed
Use this skill when authoring, planning, or running a declarative `sbxenv.yaml` file for Docker Sandboxes (`sbx env create/run/plan/exec/rm`), even if the user just says they want to "check in a sandbox config", "make onboarding reproducible for a sandbox", "run a setup script before the agent start
· Beautifier website read, tools not yet checked
notion-update-data-source · Notion verified and signed
Update a Notion data source's schema, title, or attributes using SQL DDL statements. Returns Markdown showing updated structure and schema. Accepts a data source ID (collection ID from fetch response's <data-source> tag) or a single-source database ID. Multi-source databases require the specific dat
ipython · jupyter-server verified and signed

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