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Vim sends
ESC P zz ESC \as an xterm compatibility probe and expects an unknown DCS to be consumed without printing its payload or moving the cursor. JediTerm already consumes it, but emits a misleading warning that adds an OSC introducer to the diagnostic text.Log fully consumed, unhandled DCS at DEBUG and retain the actual introducer when formatting string-sequence diagnostics. Add regression coverage for warning-free consumption, unchanged cursor position, and text preserved across every stream split around DCS and cursor sequences.
Validation: the full
:core:testsuite passes against upstream master. The consumption test also checks that the probe emits no WARN. No live terminal sessions were used.