providers: add teamorouter; pick the first /models id when no default model

src/main.c

@@ -20,7 +20,8 @@
 static void usage(const char *argv0) {
   fprintf(stderr,
           "Usage: %s [options]        (works in the current directory)\n"
-          "  -P, --provider NAME   minimax | deepseek | openai (last used)\n"
+          "  -P, --provider NAME   minimax | deepseek | openai | teamorouter\n"
+          "                        (last used)\n"
           "  -m, --model NAME      model (last used for the provider)\n"
           "  -e, --effort LEVEL    low | medium | high | max (last used)\n"
           "  -w, --workspace DIR   project directory (default: current)\n"
@@ -539,6 +540,20 @@ int main(int argc, char **argv) {
     curl_global_cleanup();
     return 1;
   }
+  /* Router presets have no fixed model: take the first one the API lists
+   * (the TUI does the same after its /models probe). */
+  if (!cfg.model[0] && cfg.headless) {
+    char ids[1][128], err[256] = "";
+    if (cst_llm_list_models(cfg.api_base, cfg.api_key, ids, 1, err,
+                            sizeof(err)) > 0) {
+      snprintf(cfg.model, sizeof(cfg.model), "%s", ids[0]);
+    } else {
+      fprintf(stderr, "no model for %s: pass --model (%s)\n", cfg.provider,
+              err[0] ? err : "the API listed none");
+      curl_global_cleanup();
+      return 1;
+    }
+  }
 
   fprintf(stderr,
           "using %s model=%s effort=%s protocol=%s tools=%s max_steps=%d\n",