feat: add model aliases + minimax shortlist

src/agents/model-selection.ts

@@ -6,6 +6,15 @@ export type ModelRef = {
   model: string;
 };
 
+export type ModelAliasIndex = {
+  byAlias: Map<string, { alias: string; ref: ModelRef }>;
+  byKey: Map<string, string[]>;
+};
+
+function normalizeAliasKey(value: string): string {
+  return value.trim().toLowerCase();
+}
+
 export function modelKey(provider: string, model: string) {
   return `${provider}/${model}`;
 }
@@ -26,6 +35,49 @@ export function parseModelRef(
   return { provider, model };
 }
 
+export function buildModelAliasIndex(params: {
+  cfg: ClawdisConfig;
+  defaultProvider: string;
+}): ModelAliasIndex {
+  const rawAliases = params.cfg.agent?.modelAliases ?? {};
+  const byAlias = new Map<string, { alias: string; ref: ModelRef }>();
+  const byKey = new Map<string, string[]>();
+
+  for (const [aliasRaw, targetRaw] of Object.entries(rawAliases)) {
+    const alias = aliasRaw.trim();
+    if (!alias) continue;
+    const parsed = parseModelRef(String(targetRaw ?? ""), params.defaultProvider);
+    if (!parsed) continue;
+    const aliasKey = normalizeAliasKey(alias);
+    byAlias.set(aliasKey, { alias, ref: parsed });
+    const key = modelKey(parsed.provider, parsed.model);
+    const existing = byKey.get(key) ?? [];
+    existing.push(alias);
+    byKey.set(key, existing);
+  }
+
+  return { byAlias, byKey };
+}
+
+export function resolveModelRefFromString(params: {
+  raw: string;
+  defaultProvider: string;
+  aliasIndex?: ModelAliasIndex;
+}): { ref: ModelRef; alias?: string } | null {
+  const trimmed = params.raw.trim();
+  if (!trimmed) return null;
+  if (!trimmed.includes("/")) {
+    const aliasKey = normalizeAliasKey(trimmed);
+    const aliasMatch = params.aliasIndex?.byAlias.get(aliasKey);
+    if (aliasMatch) {
+      return { ref: aliasMatch.ref, alias: aliasMatch.alias };
+    }
+  }
+  const parsed = parseModelRef(trimmed, params.defaultProvider);
+  if (!parsed) return null;
+  return { ref: parsed };
+}
+
 export function resolveConfiguredModelRef(params: {
   cfg: ClawdisConfig;
   defaultProvider: string;
@@ -34,10 +86,16 @@ export function resolveConfiguredModelRef(params: {
   const rawModel = params.cfg.agent?.model?.trim() || "";
   if (rawModel) {
     const trimmed = rawModel.trim();
-    if (trimmed.includes("/")) {
-      const parsed = parseModelRef(trimmed, params.defaultProvider);
-      if (parsed) return parsed;
-    }
+    const aliasIndex = buildModelAliasIndex({
+      cfg: params.cfg,
+      defaultProvider: params.defaultProvider,
+    });
+    const resolved = resolveModelRefFromString({
+      raw: trimmed,
+      defaultProvider: params.defaultProvider,
+      aliasIndex,
+    });
+    if (resolved) return resolved.ref;
     // TODO(steipete): drop this fallback once provider-less agent.model is fully deprecated.
     return { provider: "anthropic", model: trimmed };
   }