Ygg v0.3.1-alpha

Ygg v0.3.1-alpha

Ygg v0.3.1-alpha is a rendering-correctness patch for the default native
terminal-scrollback interface. It fixes intermittent transcript corruption while
model output is streaming, especially when terminal resizing and scrolling happen
together.

Ygg is not an operating-system sandbox. An enabled bash tool runs with the
authority of the user who launched Ygg; use OS isolation for untrusted workspaces,
models, or extensions.

Install

Ygg supports macOS and Linux. Install Rust 1.86 or newer and rg (ripgrep), then
run the pinned installer:

curl --proto '=https' --tlsv1.2 -LsSf \
  https://raw.githubusercontent.com/skaft-software/ygg/v0.3.1-alpha/scripts/install.sh | sh

Or install without changing a shell profile:

cargo install --locked \
  --git https://github.com/skaft-software/ygg \
  --tag v0.3.1-alpha \
  --bin ygg \
  ygg-coding-agent

Verify the installation with ygg --version and ygg --help.

What changed

• Finalized streamed rows now enter native scrollback exactly once when a
  provisional Markdown layout shrinks.
• Resize handling atomically deletes Kitty image placements, clears the reflowed
  screen and saved lines, and replays the complete Ygg-owned transcript at the
  new dimensions.
• Large lists and tables expose stable item and row commit boundaries, allowing
  long responses to keep advancing into scrollback during generation.
• Theme changes, compaction disclosure toggles, and other presentation repaints
  preserve terminal-owned history. They do not clear scrollback or replay
  committed transcript rows.
• Deferred session-history prepends and cancelled streaming attempts preserve
  globally ordered commit identities without sacrificing lazy long-session
  rendering.

The regression suite exercises streaming layout shrink, terminal width changes,
nonzero scrollback offsets, and synchronized output in combination.

Compatibility and limitations

• Existing Ygg sessions and historical exec tool records remain supported.
• Resizing intentionally clears all terminal-owned saved lines, including shell
  output from before Ygg started, so the transcript can be rebuilt without
  depending on terminal-specific reflow behavior.
• Native terminal scrollback keeps the styling it had when rows were committed;
  a later theme change repaints only the live grid.
• Configuration, session, extension, and public crate APIs remain pre-1.0 and may
  evolve in later releases.
• Command execution is Unix-only and inherits the launching user's filesystem,
  environment, process, and network authority.

See the changelog
and security policy
for the complete changes and security boundary.