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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.209

Max Subscription Upgrade Flow Simplified

The "upgrade to Max" subscription flow previously showed different messages depending on whether the user was in a background session. Background-session-specific strings were removed:

  • "You are already on the highest Max subscription plan. For additional usage, run /login from an interactive terminal to switch to an API usage-billed account." — collapsed to a single message without the background-session qualifier.
  • "Visit ... to upgrade to Max, then run /login from an interactive terminal to use your new plan." and "Visit ... to upgrade to Max. Run /login after upgrading to use your new plan." — replaced with a direct call to open the upgrade URL without a fallback text path.
Evidence

B$t function simplified (search for "You are already on the highest Max subscription plan"); background-session URL-open fallback removed (search for "to upgrade to Max, then run /login from an interactive terminal")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.209 →