Successful signup provides clear confirmation

When signup succeeds silently, users cannot tell whether the click worked. Some retry the form and create duplicate attempts that the backend must deduplicate; others assume failure and leave entirely. The user-experience taxon treats acknowledgement of state changes as foundational: the moment an account is created is the single most important transition in the funnel, and a redirect with no toast, welcome screen, or onboarding handoff makes that transition invisible to the user who just completed it.

Add an explicit success signal on the post-signup path. In src/app/(auth)/signup/page.tsx, fire a toast with a concrete confirmation message and route new users to a welcome or onboarding route rather than dropping them on the main dashboard. Many auth libraries expose an isNewUser flag you can branch on.

const onSignup = async () => {
  await createAccount(data);
  toast.success('Welcome! Your account has been created.');
  router.push('/onboarding');
};

• ID: saas-onboarding.signup-flow.signup-success-confirmation

• Severity: medium

• What to look for: Find what happens immediately after a successful account creation. Count all post-signup feedback mechanisms: redirect targets, toast/notification triggers, and confirmation screens. Quote the actual redirect path if found.

• Pass criteria: After successful signup, the user receives at least 1 clear confirmation mechanism that their account was created — either via a redirect to a welcome screen, a success toast/notification, or an onboarding flow that begins immediately. The user is never left wondering if signup worked.

• Fail criteria: After successful signup, the user is silently redirected to the main dashboard with no acknowledgment that their account was created. Or: the signup button shows a loading state indefinitely with no success or error feedback.

• Skip (N/A) when: No signup flow exists in the codebase.

• Detail on fail: "Post-signup redirect lands directly on /dashboard with no success toast or welcome message. New users receive no confirmation their account was created and may attempt to sign up again."

• Remediation: In the post-signup callback at src/app/(auth)/signup/page.tsx:

  const onSignup = async () => {
    await createAccount(data);
    toast.success('Welcome! Your account has been created.');
    router.push('/onboarding');
  };
  

  Many auth libraries expose an isNewUser flag on the session for conditional routing.