You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
GatewayArea: what it touches
ImprovementsKind: in v2.1.233,
ImprovementsSection of the release
What
The proxy-writing guidance bundled with the gateway docs still tells you to log upstream errors and return a generic message preserving error.type, but now makes an exception: if a 400 or 413 arrives in Anthropic's own error envelope, relay its error.message, because client-side recovery such as auto-compact keys on that text.
Details
The guidance text appears twice in the gateway docs and both copies changed.
Evidence
own error envelope (e.g. \prompt is too long: \u2026\): relay that
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
