Compare Command Blocks

sivtr diff compares two recent command blocks from the current shell session. It is useful when you are iterating on builds, tests, prompts, or diagnostics and want to see what changed between runs.

Shell integration must be installed first so sivtr has structured command blocks to compare.

sivtr init powershell
# or: sivtr init bash / zsh / nushell

Restart the shell after installation.

Basic diff

Compare the latest command output with the previous command output:

sivtr diff 1 2

Selectors are newest-first. 1 is the latest command block and 2 is the one before it.

Choose what to compare

The default is output-only comparison.

sivtr diff 1 2 --output
sivtr diff 1 2 --block
sivtr diff 1 2 --input
sivtr diff 1 2 --cmd

Option	Compares
--output	Command output. This is the default.
--block	Input plus output
--input	Input with prompt
--cmd	Bare command text

Only one content mode can be used at a time.

Side-by-side view

Use a two-column text view instead of unified diff output:

sivtr diff 2 1 --side-by-side
sivtr diff 3 1 --block --side-by-side

Tips

• Compare 1 2 when you just reran a command and want to inspect the delta.
• Use --cmd to verify that two copied or retried commands were actually different.
• Use --block when prompt or command context matters as much as output.