Claude/Code/Q/Is there a Claude Code CLI slash command to see a diff of changed files, and why doesn't /diff show the diff content?

• Is there a Claude/Code CLI slash command to see a diff of changed files, and why doesn't /diff show the diff content?

  • AI Answer

    • Answer/Official from Claude Code Commands Reference
    • Short answer: /diff exists; the "New file not yet staged" message for untracked files is a side effect of the Current tab being git diff HEAD under the hood, not intentional concealment — git has no index entry to diff an untracked file against.
    • Per the official reference, /diff has two kinds of tabs: Current (git diff HEAD, all uncommitted changes) and per-turn (T1, T2, …, individual Claude turns). The docs describe switching between them but don't specify the per-turn tabs' data source.
    • Unconfirmed in official docs (seen on a third-party blog): per-turn tabs may reconstruct edits from the conversation record rather than from git, which would let them show new-file content without staging first. Worth testing empirically — arrow to a turn tab (e.g. T6) for an untracked file instead of Current.
    • Running git add <file> stages an untracked file; after that, the Current tab shows its full diff and line counts.
    • The Current tab shows content normally for already-tracked, modified files — the missing-content behavior is specific to untracked new files there.
    • Other ways to view diffs in the CLI:
      • The per-turn tabs (T1, T2, …) in /diff
      • IDE integrations (e.g. JetBrains) rendering Claude Code diffs natively
      • /code-review, which shows diffs alongside review feedback
    • A feature request to stage untracked files from within /diff was filed and closed as not planned.