Terminals now pick up OSC 133 prompt/command/output/finished marks,
which the VT parser ignores: a scanner (app/src/osc.rs, split-safe
across reads, bodies capped at 4 KiB) finds them in the output stream
and each mark records the cursor line. Lines are stable indexes that
account for lines a full scrollback rotates out, so marks stay on their
text; clearing the scrollback drops them.
With marks present: Ctrl/Cmd+Shift+Up/Down and Previous/Next Prompt in
the context menu jump between prompts, Copy Last Command Output copies
what the last finished command printed, and a green/red bar beside each
prompt shows the exit status (hover for code and duration). OSC 7
working-directory reports are parsed too (used by the next change).
The manual shows bash and zsh snippets; fish 4 and common prompt themes
already send the marks.
Andy Dixon
58cb531e32