Each round of a multi-tool-call chain used to append a new "Calling: X"
message, so a long tool chain stacked up a growing list of rows in the
transcript. Replaced with a transient status line under the thinking
indicator that updates in place each round; once the response
completes, the whole chain collapses into one expandable summary
message ("Used N tool calls") instead of N separate ones.
rune
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