/**
 * context-discovery.ts
 *
 * Multi-provider context window discovery with verbose-first endpoint probing.
 *
 * Implements a provider-agnostic discovery chain that probes endpoints from
 * most-informative (verbose) to least-informative, returning the richest
 * available context window data for each model.
 *
 * Discovery chain (ordered most-verbose to least-verbose):
 *   1. /api/v1/models , LM Studio rich format (key + max_context_length)
 *   2. /api/tags      , Ollama list + per-model /api/show for context_length
 *   3. /v1/models     , OpenAI compat (id, optionally max_model_len for vLLM)
 *   4. /props         , llama.cpp server-level n_ctx (single context all models)
 *   5. /info          , TGI format (max_input_tokens / max_total_tokens)
 *
 * Capability gate: `local-provider-context-ingestion` (provider.localContextIngestion, default on)
 */
/** Placeholder model ID used when a server-level endpoint has no model list. */
export declare const SERVER_LEVEL_MODEL_ID = "__server__";
/**
 * Discover context window sizes for all models at the given provider base URL.
 *
 * Probes endpoints in verbose-first order:
 *   1. LM Studio `/api/v1/models`
 *   2. Ollama `/api/tags` + `/api/show`
 *   3. OpenAI-compat `/v1/models`
 *   4. llama.cpp `/props`
 *   5. TGI `/info`
 *
 * The first probe that yields a non-null result populates the map. Subsequent
 * probes only ADD entries for model IDs not yet present, they never overwrite
 * data from a more-informative probe.
 *
 * @param baseURL - Provider base URL (e.g. `http://localhost:11434/v1`).
 *   The `/v1` suffix is used for the OpenAI-compat probe; the origin is
 *   derived automatically for all other probes.
 * @param apiKey  - Optional Bearer token sent with every probe request.
 * @returns Map of model ID → context window in tokens. Empty map if all
 *          probes fail or none return context length data.
 */
export declare function discoverContextWindows(baseURL: string, apiKey?: string | undefined): Promise<Map<string, number>>;
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