Function buildCustomEntry

src/setup/gateways.ts:194–222

(opts: {
  spec?: GatewaySpec;
  name?: string;
  baseUrl?: string;
  apiKeyEnv?: string;
  modelId?: string;
  contextWindow?: number;
  toolCalls?: boolean;
})

 *
 * The base URL must be the root (e.g. `https://integrate.api.nvidia.com/v1`). Users very
 * commonly paste a deeper path instead — the model-list URL (`…/v1/models`) or the full
 * chat URL (`…/v1/chat/completions`) — and then EVERY request hits `…/v1/models/chat/completions`
 * (a 404) or `…/v1/chat/completions/chat/completions`. We defensively strip those trailing
 * segments and any trailing slash so the common copy-paste mistake just works.
 */
export function normalizeBaseUrl(raw: string): string {
  let u = (raw ?? '').trim().replace(/\/+$/, '');           // drop trailing slash(es)
  u = u.replace(/\/(?:chat\/completions|completions|models)$/i, ''); // strip a pasted endpoint path
  return u;
}

export function buildCustomEntry(opts: {
  spec?: GatewaySpec;
  name?: string;
  baseUrl?: string;
  apiKeyEnv?: string;
  modelId?: string;
  contextWindow?: number;
  toolCalls?: boolean;
}): CustomProviderEntry {
  // spec names are already valid; a user-supplied custom name may be a raw URL → slugify it.
  const name = opts.spec ? (opts.spec.name ?? '').trim() : slugifyProviderName(opts.name ?? '');
  const baseUrl = normalizeBaseUrl(opts.baseUrl ?? opts.spec?.baseUrl ?? '');
  const apiKeyEnv = (opts.apiKeyEnv ?? opts.spec?.apiKeyEnv ?? '').trim();
  if (!name) throw new Error('provider name is required');
  if (/[\s/:]/.test(name)) throw new Error(`invalid provider name "${name}": must not contain spaces, "/", or ":"`);
  if (!baseUrl) throw new Error('baseUrl is required');
  if (!apiKeyEnv) throw new Error('apiKeyEnv is required');

  const entry: CustomProviderEntry = { name, apiKeyEnv, baseUrl };
  const modelId = opts.modelId ?? opts.spec?.suggestedModel;
  if (modelId) {