Function write_program_status 

pub fn write_program_status<W: Write>(
    w: &mut W,
    report: &ProgramStatus<'_>,
) -> Result<()>

Write one complete program status report without flushing.

All fields are validated before any bytes are written. Invalid IDs, state names, kind names, app names, text, or percentages return io::ErrorKind::InvalidInput. State and kind names must be nonempty values from [A-Za-z0-9_.,+/=-]. Text limits count UTF-8 bytes before base64 encoding. The complete encoded sequence, including its framing, must fit within 4096 bytes.

A terminal may apply lower limits or ignore OSC 7501 entirely. This function reports write errors, not terminal acceptance.

use uncurses::ansi::program_status::{
    ProgramStatus, ProgramStatusState, write_program_status,
};

let mut report = ProgramStatus::new(ProgramStatusState::WORKING);
report.app = Some("cargo");
report.message = Some("Build");
let mut bytes = Vec::new();
write_program_status(&mut bytes, &report).unwrap();
assert_eq!(bytes, b"\x1b]7501;state=working:app=cargo:msg=QnVpbGQ=\x1b\\");