Vibe Coding
Tip: `forward_user_identity` Lets a Proxy Behind the Claude Code Apps Gateway Attribute Spend Per User
The 2.1.233 release added an opt-in `forward_user_identity` setting on Anthropic upstreams in the apps gateway that sends the signed-in user's identity as request headers, so a proxy sitting behind the gateway can attribute token spend to individual users. This closes the gap teams hit when a shared gateway makes every request look identical and per-developer cost is unknowable. Same release also improved gateway error forwarding so 400/413 errors from Vertex, Foundry and Claude Platform on AWS now carry the upstream's own message instead of a generic wrapper.
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