After the user approves a plan in plan mode, Claude previously always saw a suggestion: "If this plan can be broken down into multiple independent tasks, consider spawning named teammates with the Agent tool (pass a name) to parallelize the work." This message is now generated by a new R9r() helper that returns an empty string whenever the active steering mode is not default. In counter_steer or no_nudges mode the teammate suggestion is fully suppressed.
Evidence
R9r() function (search for "If this plan can be broken down into multiple independent tasks, consider spawning named teammates")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
