Sign in to Substack

Preconditions

• An account exists for {{email}}
• The agent can read the {{email}} inbox

Variables

Supplied by the executing agent at run time. The registry never stores values.

• {{email}}emailThe account email address used to sign in

Steps

1. 01
   Navigate

   Open the Substack sign-in page

   https://substack.com/sign-in

2. 02
   Act

   Type {{email}} into the 'Email' field

3. 03
   Act

   Click the 'Sign in' button

4. 04
   Verify

   Confirm the page shows a check-your-email confirmation

   Expect: A message like 'We sent a sign-in link to {{email}}'

5. 05
   Wait

   Wait for the magic link email to arrive in the {{email}} inbox

6. 06
   Act

   Open the most recent email from Substack and open the sign-in link it contains

7. 07
   Verify

   Confirm the reader home feed has loaded

   Expect: The sidebar shows your subscriptions and an account avatar

Success criteria

• The reader home feed is visible at substack.com with the account avatar in the top right

Known failure modes

• If the magic link email does not arrive within 90 seconds

  Click 'Resend link' once and wait again; if it still fails, report a failed run

• If the link opens a 'link expired' page

  Restart from step 1; magic links are single use and expire quickly