Bumps react-syntax-highlighter from ^15.6.1 to ^16.1.1. The v16 line
pulls refractor 5 and prismjs ^1.30.0, keeping react-ui's syntax
highlighting dependency chain current for downstream consumers.
The public API used by CodeBlock (the Prism/Light exports) is unchanged,
and highlighting renders the same across common languages.
Closes#2823.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The legacy Markdown renderer enabled rehype-raw with no HTML sanitizer,
so raw HTML embedded in assistant/model output reached the DOM (CWE-79).
Add rehype-sanitize as the terminal rehype pass so it runs after any
consumer-supplied rehypePlugins and cannot be bypassed. Add a regression
test covering the dangerous-HTML vectors (script/style/base/form/iframe,
event handlers, javascript: URLs) and the consumer-plugin injection path,
and assert legitimate Markdown/GFM features still render. Pin react-dom to
a caret range for the SSR-based test.
Adds two CI signals for keeping the published packages small and broadly compatible:
- Bundle size: size-limit file-mode config across packages plus a
CopilotChat import-size regression signal (gzip) so growth in the
headline consumer entrypoint is visible on every PR. A bundle-size
workflow comments results on the PR (Phase 1: no hard-fail).
- ES compatibility: a compat-check (es-check) script across 9 packages
with a root .browserslistrc, validating built .mjs/.cjs against the
es2022 build target.
The measure script is importable (measureBundle) and unit-tested. Dev
docs live under dev-docs/ (bundle-size.md, browser-compat.md). All
action refs are pinned to full commit SHAs for supply-chain safety.
BenTaylorDev