@@ -35,6 +35,16 @@ type renderSpec struct {
 // user has configured. The renderer lays its rendering out to the width of the
 // view, which only the layout settles, so the task is created after it.
 func (gui *Gui) newRenderTask(view *gocui.View, cmd *exec.Cmd, prefix string) error {
+	// Ask whatever renders the diff to state, in an OSC 1717 record per line,
+	// which line of which file it is rendering. This lets us act on the line the
+	// user is pointing at even when the rendering no longer looks like a diff.
+	// The variable names the protocol versions we understand, and a renderer
+	// that doesn't understand it ignores it, so we can set it always. It has to
+	// be set before the plain path below, since on that path git renders the
+	// diff itself, and git speaks the protocol too, for its word-diff formats,
+	// whose markup we could not otherwise resolve.
+	cmd.Env = append(cmd.Env, "OSC1717=V1")
+
 	if gui.stateAccessor.GetDiffRendererConfigManager().GetDiffRendererType() == config.DiffRendererType_RawGit {
 		// If we're not using a custom diff renderer, then we don't need to use a pty
 		return gui.newCmdTask(view, cmd, prefix)
 
@@ -0,0 +1,50 @@
+package diff
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var DiffRendererMetadata = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "A diff renderer is told that we understand the OSC 1717 metadata protocol, and the records it emits don't show up in the rendered diff",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig: func(cfg *config.AppConfig) {
+		// A fake conforming renderer: it announces the protocol with a
+		// version-only record, reports the protocol versions it was offered, and
+		// then passes the diff through with a per-line record in front of every
+		// line.
+		cfg.GetUserConfig().Git.DiffRenderers = []config.DiffRendererConfig{
+			{Command: `printf '\033]1717;1\007'; ` +
+				`printf 'OFFERED:%s\n' "$OSC1717"; ` +
+				`while IFS= read -r line; do printf '\033]1717;1;c;1;;file1\007%s\n' "$line"; done`},
+		}
+	},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateFileAndAdd("file1", "one\ntwo\n")
+		shell.Commit("one")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("one").IsSelected(),
+			)
+
+		t.Views().Main().
+			// The renderer was offered the protocol version we understand.
+			Content(Contains("OFFERED:V1")).
+			// Its records are escape sequences, so none of them reaches the
+			// screen; the diff reads exactly as the renderer wrote it.
+			ContainsLines(
+				Equals("diff --git a/file1 b/file1"),
+				Contains("new file mode"),
+				Contains("index "),
+				Equals("--- /dev/null"),
+				Equals("+++ b/file1"),
+				Equals("@@ -0,0 +1,2 @@"),
+				Equals("+one"),
+				Equals("+two"),
+			)
+	},
+})
@@ -228,6 +228,7 @@ var tests = []*components.IntegrationTest{
 	diff.DiffAndApplyPatch,
 	diff.DiffCommits,
 	diff.DiffNonStickyRange,
+	diff.DiffRendererMetadata,
 	diff.IgnoreWhitespace,
 	diff.RenameSimilarityThresholdChange,
 	diff.RenderThroughAPipe,