Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
API ClientArea: what it touches
Internal ChangesKind: in v2.1.277,
Internal ChangesSection of the release
What
Where the client's default headers previously spread in only one extra source (the ANTHROPIC_CUSTOM_HEADERS-derived anthropic-beta values), the code now also spreads a literal false value immediately before it.
Why
Spreading a boolean false into an object has no effect, so this appears to be an inert change with no impact on the headers Claude Code sends.
