diff --git a/src/lib/components/chat/MessageInput.svelte b/src/lib/components/chat/MessageInput.svelte
index 970e34246e..c850794648 100644
--- a/src/lib/components/chat/MessageInput.svelte
+++ b/src/lib/components/chat/MessageInput.svelte
@@ -1699,7 +1699,7 @@
 		title={$i18n.t('Compare text')}
 		initialContent={comparisonTarget?.content ?? ''}
 		applyLabel={$i18n.t('Use in prompt')}
-		applyDescription={$i18n.t('Uses the left working copy as your prompt.')}
+		applyDescription={$i18n.t('Uses the proposed revision as your prompt.')}
 		discardMessage={$i18n.t(
 			'Your comparison changes will be discarded. Your prompt will stay unchanged.'
 		)}
diff --git a/src/lib/components/common/DiffEditorModal.svelte b/src/lib/components/common/DiffEditorModal.svelte
index 0ff40c903d..632f4d6232 100644
--- a/src/lib/components/common/DiffEditorModal.svelte
+++ b/src/lib/components/common/DiffEditorModal.svelte
@@ -93,7 +93,7 @@
 	};
 	const apply = () => {
 		try {
-			onApply(working);
+			onApply(proposal);
 			close();
 		} catch (cause) {
 			error = cause instanceof Error ? cause.message : String(cause);
@@ -527,7 +527,7 @@
 			<footer class="flex shrink-0 flex-wrap items-center gap-2 px-5 py-3">
 				<p class="mr-auto text-gray-500">
 					{applyDescription ??
-						$i18n.t('Apply uses the left working copy. Save your draft afterward.')}
+						$i18n.t('Apply uses the proposed revision on the right. Save your draft afterward.')}
 				</p>
 				<button type="button" class="secondary" on:click={requestClose}>{$i18n.t('Cancel')}</button>
 				<button type="button" class="primary" disabled={loading} on:click={apply}
diff --git a/src/lib/i18n/locales/en-US/translation.json b/src/lib/i18n/locales/en-US/translation.json
index 630f6bd26d..3a47b72b5a 100644
--- a/src/lib/i18n/locales/en-US/translation.json
+++ b/src/lib/i18n/locales/en-US/translation.json
@@ -1,4 +1,6 @@
 {
+	"Apply uses the proposed revision on the right. Save your draft afterward.": "",
+	"Uses the proposed revision as your prompt.": "",
 	"Compare text": "",
 	"Use in prompt": "",
 	"Uses the left working copy as your prompt.": "",