Run M-x magit-diff-flycheck in a magit-diff buffer to display a filtered list of Flycheck errors for the added/modified lines only.

Use can also run the command with a prefix which will prompt you for the scope of the errors, eg. C-u M-x magit-diff-flycheck.

This is primarily meant to be used on legacy projects where you do not want to see errors for the whole file but only for the added/modified lines.

Install

Available on MELPA.

Main dependencies

Variable	Notes	Default
`magit-diff-flycheck-inhibit-message`	If non-nil, disable message output while running.	`t`
`magit-diff-flycheck-default-scope`	The default scope for filtering errors.	`lines`
`magit-diff-flycheck-context`	Lines of context for diff when filtering errors.	`0`

Open up a magit-diff buffer and run M-x magit-diff-flycheck.