- Nine providers reimplemented createApiKeyLogin's exact prompt/trim/abort flow
verbatim; they now call the existing helper instead.
- Extended ApiKeyLoginConfig with optional authUrl/instructions and an
emptyKeyFallback so the local-server family (llama.cpp, vLLM, LM Studio)
collapses onto the same helper without changing observable behavior.
- Left ollama, ollama-cloud, nvidia, qwen-portal, github-copilot and both
alibaba flows hand-written: their error classes, messages or callback
ordering differ, so migrating them would change observable behavior.
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