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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 v2.1.213

Background Sessions: Clearer "No Terminal" Error Messages

Error messages that previously said "in a background session" now say "no terminal is attached to this background session" and include instructions on how to attach. Three affected messages:

  • MCP server authentication: "Can't authenticate MCP servers while no terminal is attached to this background session. Attach to it and try again."
  • /install-github-app: "Can't run /install-github-app while no terminal is attached to this background session. Attach to it and run the command again."
  • /mcp panel: "Can't open MCP settings while no terminal is attached to this background session. Attach to it and run /mcp again, or use \/mcp enable|disable|reconnect <server>\ to steer without the panel."
Evidence

Background session guards (search for "no terminal is attached to this background session")

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

See this entry in the whole of v2.1.213 →