proxy: translate chat requests between openai/anthropic/ollama protocols

[nightscape]

Summary

• New proxy/translate package: canonical OpenAI-shaped IR, with parsers/emitters for OpenAI, Anthropic and Ollama chat endpoints (both non-streaming and streaming).
• ModelConfig.Protocols declares which wire formats each model natively supports. Default [openai, anthropic] preserves existing behaviour bit-for-bit.
• When a client's protocol is supported: zero-cost pass-through. When it isn't: translate request + response (including SSE/NDJSON streaming and tool-use), with stateless reversible tool-call ID mapping.
• Ollama API surface registered: /api/chat, /api/generate, /api/tags (filtered by protocols), /api/show.
• Header bridging (x-api-key ↔ Authorization: Bearer, default anthropic-version) and protocol-aware error envelopes from sendErrorResponse.
• Peer-routed models return 501 on Ollama mismatch for now; cross-peer translation is a follow-up.

Status

Draft. Covered by go test ./proxy/translate/... (IR, cross-protocol, ID round-trip, stream parsers/emitters) and make test-dev is green. End-to-end integration tests against a real upstream and response_format=json_schema translation are listed as follow-ups in the plan.

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[mostlygeek]

Hi,

see the llama-swappo fork which has these endpoints. That would the place to contribute ollama features.

[ojsef39]

Hi,

see the llama-swappo fork which has these endpoints. That would the place to contribute ollama features.

Hey, while i can kinda understand this, i would love to have the ollama functionality here instead of some fork which might or might not get updated with upstream.
Thank you for your consideration! :)