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[proxy,management] Conform the Agent Network endpoint to the LLM gateway protocol Reviewed the proxy against Claude Code's published gateway contract. The transport layer already held up; fourteen gaps sat one layer up, in the model catalog and in the non-inference endpoints clients call. Two of them cost money. The catalog carried no claude-opus-5 or claude-sonnet-5, so an operator could not authorise the models coding agents default to — those requests denied as not-routable, or priced at zero where a catch-all carried them. And gateway records pin ParserID "openai" while the same record serves /v1/messages, so Anthropic responses were read with the OpenAI parser, which never looks at message_start where input tokens live: input metered as roughly zero on every stream and cost was skipped entirely. The rest fix requests refused for structural rather than policy reasons: model discovery denied for every account with a model allowlist, token counting denied on Bedrock and mis-parsed on Vertex, startup probes refused and written into the access log at every session start, and denials rendered in a shape no LLM client parses. Two changes are additive by design — the deny body keeps every field it had and adds the vendor's error object alongside, and body-level identity injection is now gated on the request's dialect so it stops sending OpenAI-shape fields into Anthropic bodies that reject them. The end-to-end work turned up one more: the discovery filter treated any slash in a model id as a gateway prefix, which would have dropped every self-hosted "Qwen/..." model from the picker.