export type ProviderOptionsSource = 'env' | 'project' | 'global' | 'default';
export type ProviderOptionsTraceOrigin = 'env' | 'cli' | 'local' | 'global' | 'default';
export type ProviderOptionsOriginResolver = (path: string) => ProviderOptionsTraceOrigin;
/**
 * Source layer of a resolved provider/model value.
 *
 * Resolution priority (highest first):
 *   cli/env > promotion > step > provider_routing.steps >
 *   provider_routing.tags > provider_routing.personas > persona_providers >
 *   auto.rules/auto.dynamic/auto.fallback > capabilities > project >
 *   global/runtime-v1 > default
 *
 * - `promotion`: step promotion override selected for the current execution
 * - `cli`: --provider / --model CLI flag
 * - `persona_providers`: legacy config's `persona_providers` map
 * - `step`: engine-synthesized step provider/model fields
 * - `capabilities`: enumeration-only source; never supplies provider/model values
 * - `project`: project `.takt/config.yaml`
 * - `global`: `~/.takt/config.yaml`
 * - `runtime-v1`: runtime.yaml `provider.defaults` (issue #1136 runtime-v1 mode)
 * - `default`: provider's built-in default (no explicit configuration)
 */
export type ProviderResolutionSource = 'env' | 'promotion' | 'auto.rules' | 'auto.dynamic' | 'auto.fallback' | 'cli' | 'persona_providers' | 'provider_routing.personas' | 'provider_routing.tags' | 'provider_routing.steps' | 'step' | 'capabilities' | 'project' | 'global' | 'runtime-v1' | 'default';
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