/**
 * Embedding Service — Multi-provider embedding abstraction
 *
 * Generates text embeddings for semantic search using multiple providers.
 * Auto-detects provider from available API keys.
 *
 * Provider detection (in priority order):
 *   GITMEM_EMBEDDING_PROVIDER=openai|openrouter|ollama — force provider
 *   OPENAI_API_KEY → OpenAI direct (text-embedding-3-small)
 *   OPENROUTER_API_KEY → OpenRouter (text-embedding-3-small via openrouter.ai)
 *   OLLAMA_URL → Ollama local (nomic-embed-text, 768-dim — requires pgvector dimension match)
 *
 * If no provider is configured, embed() returns null (graceful degradation).
 * Records stored without embeddings can still be retrieved by ID/filters,
 * but won't appear in semantic search results.
 */
export type EmbeddingProvider = "openai" | "openrouter" | "ollama" | "none";
interface EmbeddingConfig {
    provider: EmbeddingProvider;
    apiUrl: string;
    apiKey: string;
    model: string;
    expectedDim: number;
}
/**
 * Detect the best available embedding provider from environment.
 *
 * Resolution chain for OpenRouter key:
 *   1. process.env.OPENROUTER_API_KEY (env var)
 *   2. .gitmem/config.json → openrouter_key (written by `activate`)
 *
 * This matches how supabase-client.ts resolves credentials via getProConfig().
 */
export declare function detectProvider(): EmbeddingConfig;
/**
 * Get the current embedding configuration (cached)
 */
export declare function getEmbeddingConfig(): EmbeddingConfig;
/**
 * Reset cached config (for testing)
 */
export declare function resetEmbeddingConfig(): void;
/**
 * Generate an embedding for the given text.
 *
 * Returns normalized embedding vector, or null if no provider is configured.
 * Throws on API errors (network, auth, rate limit).
 */
export declare function embed(text: string): Promise<number[] | null>;
/**
 * Get the expected embedding dimension for the current provider.
 * Returns 0 if no provider configured.
 */
export declare function getEmbeddingDim(): number;
/**
 * Check if embedding generation is available.
 */
export declare function isEmbeddingAvailable(): boolean;
/**
 * Get the current provider name.
 */
export declare function getProviderName(): EmbeddingProvider;
export {};
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