import { splitTrailingAuthProfile } from "../../agents/model-ref-profile.js";

import { isModelKeyAllowedBySet } from "../../agents/model-selection-shared.js";

/** Alias lookup tables used by `/model` directive resolution. */

export type ModelAliasIndex = {

byAlias: Map<

string,

byKey: Map<string, string[]>;

};

/** Resolved model choice from a `/model` directive. */

export type ModelDirectiveSelection = {

provider: string;

model: string;

"nano",

];

/** Builds the canonical provider/model key used by allowlists and aliases. */

export function modelKey(provider: string, model: string): string {

const providerId = provider.trim();

const modelId = model.trim();

: `${providerId}/${modelId}`;

}

/** Resolves an explicit model directive string into a provider/model ref. */

export function resolveModelRefFromDirectiveString(params: {

raw: string;

defaultProvider: string;

};

}

/** Resolves a `/model` directive into an allowlisted model selection or error. */

export function resolveModelDirectiveSelection(params: {

raw: string;

defaultProvider: string;

return Object.assign({ candidate }, details);

})

.toSorted((a, b) => {

// Tie-break deterministically so repeated prompts pick the same model.

if (b.score !== a.score) {

return b.score - a.score;

}