Five layers, cheapest first: which accounts a configuration produces, the
flags each one hands Edge, the run loop's ordering and exit codes, one
account failing every way it can without ending the batch, and two real
Edge profiles holding two independent, persistent identities.
Layers 1 to 4 need nothing installed beyond selenium and run in a second.
Layer 5 starts Edge twice and reaches bing.com, so it is opt in behind
--browser. It keys on bing.com's own MUID rather than an injected cookie:
a cookie added through webdriver is not written to the profile the way a
Set-Cookie is, so it would prove nothing about a sign-in surviving.
Claude-Session: https://claude.ai/code/session_019PWUtibJn81iDbxZ4hzeU3
