OUTPUT_BEGIN
echo PRUVA_VULN_A1_$(id -u)_$(id -un)
[?2004h[0;32mvscode [0m➜ [1;34m/tmp/tmp.uMHeW5UlBv [0m$ echo PRUVA_VULN_A1_$(id -u)_$(id -un)
[?2004lPRUVA_VULN_A1_1000_vscode
[?2004h[0;32mvscode [0m➜ [1;34m/tmp/tmp.uMHeW5UlBv [0m$ 
OUTPUT_END
RESULT: RCE_CONFIRMED marker observed in PTY output