A diff viewer for when your coworker is an agent

What it does

Hunk is a terminal diff viewer built on OpenTUI and Pierre diffs that turns Git or Jujutsu changesets into a multi-file review stream. It renders split or stacked layouts with syntax highlighting, sidebar navigation, and inline annotations from AI agents. It also works as a standalone file comparator or a pipe-friendly patch viewer.

The interesting bit

The project treats agentic coding as a first-class workflow, not an afterthought. It exposes a skill file that agents can load to annotate a live Hunk session in real time, effectively turning the viewer into a shared review surface between human and model. That is a genuinely unusual take on a diff tool.

Key highlights

• Native Git and Jujutsu integration with auto-detection and watch mode for live reloads.
• Inline AI and agent annotations rendered directly beside the relevant hunks.
• Responsive layouts that automatically switch between split and stacked views.
• Mouse, keyboard, and pager support, plus an embeddable HunkDiffView component for other OpenTUI apps.
• Custom TOML-based theming with inheritance from built-in palettes.

Caveats

• No structural diffing; it is purely text-based, unlike tools such as difftastic.
• When used as a Git core pager, untracked files are excluded because Git still controls the patch contents.

Verdict

Grab this if you are already using agents to generate code and want a terminal-native way to review their output without context-switching to a browser. Skip it if you need structural, syntax-tree-aware diffs or purely non-interactive batch processing.