Held-message recognition arrives with an opt-out variable

What

Claude Code has a new feature called held-message recognition, and a new environment variable (a named value set outside Claude Code) to turn it off, CLAUDE_CODE_DISABLE_HELD_MESSAGE_RECOGNITION. What the feature does is not described.

• The feature is on only when an internal check passes, the variable is unset, and the remote kill switch tengu_snappy_sunrise_killswitch is not on. A further remote switch whose name was not resolved also gates it.
• When the variable is set, the checks for the feature return false.
• The variable is added to a list of known environment variables, and it is passed through to BYOC remote environments, taken either from your local environment or from environment_variables.

Nothing has been read about tengu_snappy_sunrise_killswitch yet.

Why

If a change in how messages are handled causes trouble, setting this variable turns the feature off locally and in BYOC remote sessions, without waiting for a remote switch.