Embedding provider implementation for Cohere's native embed API (POST <baseUrl>/v2/embed).
This is not an OpenAI-compatible endpoint: it takes texts, an input_type and the embedding_types to return, and answers with the vectors keyed by type ({"embeddings": {"float": [[...]]}}). That is why it is a module of its own and not a dialect in llm4s-openai-compatible, where Cohere's chat client lives.
Texts are sent in requests of at most CohereEmbeddingProvider.MaxTextsPerRequest (Cohere's limit); the vectors come back in input order and the billed tokens of every request are summed into the response's usage. The first failing request fails the whole call.
Requires a Cohere API key (COHERE_API_KEY) in the provider configuration. The vectors have the model's default size; no output_dimension is sent.
Turns this provider's config section into the EmbeddingProviderConfig its client needs.
Turns this provider's config section into the EmbeddingProviderConfig its client needs.
The default implementation resolves model, base URL and API key against configSpec, which is all any of the project's own providers needs. Override it only for a provider whose config genuinely cannot be expressed that way.
Value parameters
modelOverride
the <model> half of EMBEDDING_MODEL=<id>/<model>, when the unified form was used. Takes precedence over the section.
section
the llm4s.embeddings.<id> section, already parsed, its apiKey already falling back to the shared llm4s.credentials.<id>.apiKey when it sets none. Empty rather than absent when the user configured nothing. Everything this method needs arrives typed, in here: a descriptor never reads configuration itself.
Canonical id, e.g. ProviderId("voyage"). Must be unique among the embedding providers in a registry.
Canonical id, e.g. ProviderId("voyage"). Must be unique among the embedding providers in a registry.
Chat and embedding ids live in separate namespaces, so a provider that supplies both — OpenAI, Ollama — uses the same id for each without a clash. That is what lets EMBEDDING_MODEL=ollama/nomic-embed-text and a named chat section with provider = "ollama" name the same provider.