DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.
Lookalike angle-bracket protection uses a fixed 34-entry table instead of scanning 65,000 characters at startup.
What's wrong with this entry?
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What
The sanitizer guarding tag parsing against lookalike characters used to scan 65,000 code points at start-up to build its map; it now uses a fixed 34-entry table of characters that fold to "<" or ">". Same protection, no start-up scan, and the same set on every platform.
Evidence
\u27E8
Strings lifted out of the shipped bundle, so the claim above can be checked against them.