Some extended escape sequences are not "private" sequence.
By u...@zuse.jp on January 15, 2014 16:33 (imported from Google Code)
Some OSC sequences adopted by iTerm2 have odd semantics and usages, such as:
OSC 50 CopyToClipboard ...<characters>... OSC 50 EndCopy
OSC 50 BeginFile ...<characters>... OSC 50 EndFile
These extensions are not safe for other ISO-6429 compliant terminals.
It causes the "garbage output" problem.
Some terminal developers propose extensions of escape sequence based on basic design rules of ISO-2022/ISO-6429 to keep compatibility for each other.
I hope you do so, too.