Diff Viewer - Claude Board

Inspect the exact code changes made during task execution with the built-in diff viewer.

Accessing the Diff Viewer

Click on a completed task (Testing or Done status) to open Task Detail
The File Changes section shows a summary (git diff stat)
Click View Full Diff to expand the full unified diff

Diff Display

The viewer uses syntax-highlighted unified diff format:

Color	Meaning
Green (+)	Added lines
Red (-)	Removed lines
Cyan (@@)	Hunk headers (line ranges)
Bold	File headers (diff —git)
Gray	Line numbers (left column)

Commit Range

The diff automatically uses the task’s actual commit range:

Multiple commits — shows diff from first to last commit
Single commit — shows that commit’s changes
No commits — falls back to the latest commit

Limitations

Maximum diff size: 200KB (larger diffs are truncated)
Only available for tasks with git commits
Requires the project’s working directory to be a git repository

Use the diff viewer alongside Session Replay to understand both what changed and how the agent made those changes.