libghostty-vt docs mismatch: GhosttyTerminalOptions.max_scrollback says “lines” but implementation is byte-based

[robinvd]

Issue Description

Im having fun using ghostty_vt. But noticed the scrollback is less than expected. And noticed the docs says lines, but it seems to be in bytes when i trace trough to the usage.

c docs:

ghostty/include/ghostty/vt/terminal.h

Lines 170 to 171 in ac48a9b

	/** Maximum number of lines to keep in scrollback history. */
	size_t max_scrollback;

zig docs:

ghostty/src/terminal/Screen.zig

Lines 252 to 254 in ac48a9b

	/// The maximum size of scrollback in bytes. Zero means unlimited. Any
	/// other value will be clamped to support a minimum of the active area.
	max_scrollback: usize = 0,

I just started using the value as bytes, but might be useful for future users! Thanks for the great portable clib (and rust version)

Expected Behavior

Docs say bytes as thats whats actually used

Actual Behavior

Docs say lines but the unit is actually bytes

Reproduction Steps

n/a

Ghostty Logs

No response

Ghostty Version

latest main

OS Version Information

macos 26.4.1

(Linux only) Display Server

None

(Linux only) Desktop Environment/Window Manager

No response

Minimal Ghostty Configuration

n/a

Additional Relevant Configuration

No response

I acknowledge that:

• I have reviewed the FAQ and confirm that my issue is NOT among them.
• I have searched the Ghostty repository (both open and closed Discussions and Issues) and confirm this is not a duplicate of an existing issue or discussion.
• I have checked the "Preview" tab on all text fields to ensure that everything looks right, and have wrapped all configuration and code in code blocks with a group of three backticks (```) on separate lines.

[mitchellh]

Fixed