diff --git a/scripts/push-split.sh b/scripts/push-split.sh
index 779b8e3..8296107 100644
--- a/scripts/push-split.sh
+++ b/scripts/push-split.sh
@@ -54,7 +54,19 @@ trap 'git branch -D "$branch" >/dev/null 2>&1 || true' EXIT
 echo "→ splitting $prefix/ into ephemeral branch $branch …"
 git subtree split --prefix="$prefix" HEAD -b "$branch" >/dev/null
 
+# Silent Mode public repos do not carry AI-tool attribution in commit metadata
+# (see CLAUDE.md at the repo root). Strip any "Co-Authored-By: Claude ..." /
+# "Co-authored-by: Claude ..." trailers from the ephemeral branch before push.
+# Local monorepo history is untouched — only what lands on the forge is filtered.
+echo "→ scrubbing Co-Authored-By: Claude trailers from $branch …"
+FILTER_BRANCH_SQUELCH_WARNING=1 git filter-branch --force --msg-filter '
+  sed -e "/^Co-[Aa]uthored-[Bb]y: Claude.*/d"
+' "$branch" >/dev/null 2>&1
+# filter-branch leaves refs/original/refs/heads/$branch as a backup — delete it
+# so it can not be pushed by accident (--mirror isn't used here, but be safe).
+git update-ref -d "refs/original/refs/heads/$branch" 2>/dev/null || true
+
 echo "→ pushing $branch → $remote:master …"
-git push "$remote" "$branch:master"
+git push --force "$remote" "$branch:master"
 
 echo "✓ done — see https://code.silentmode.st/silentmode/$remote"