diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fcb4f57..71600bf 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -3,7 +3,7 @@ name: Release
 on:
   push:
     tags:
-      - "v*"
+      - "v[0-9]+.[0-9]+.[0-9]+"
 
 permissions:
   contents: read
@@ -217,7 +217,15 @@ jobs:
             exit 0
           fi
           git commit -m "chore: vendor installer scripts ${TAG} from ${SOURCE_REPO}"
-          git push origin "$branch"
+          # Fetch first so --force-with-lease has a remote-tracking ref to
+          # compare against when a previous run already pushed this branch;
+          # the explicit refspec is needed because the clone is single-branch.
+          git fetch origin "+refs/heads/$branch:refs/remotes/origin/$branch" 2>/dev/null || true
+          git push --force-with-lease origin "$branch"
+          if [ -n "$(gh pr list --repo "$TARGET_REPO" --head "$branch" --json number --jq '.[].number')" ]; then
+            echo "vendoring PR for $branch already exists; skipping creation"
+            exit 0
+          fi
           gh pr create \
             --repo "$TARGET_REPO" \
             --title "chore: vendor installer scripts ${TAG}" \
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae9f001..3514e45 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.1.0] - 2026-07-16
+
 ### Added
 
 - Cross-platform `install.sh` and `install.ps1` installers for the standalone
diff --git a/install.sh b/install.sh
index 4fb9ed1..5404e76 100755
--- a/install.sh
+++ b/install.sh
@@ -217,15 +217,18 @@ prepare_destination() {
   BIN_DIR="$FINAL_PARENT/cloudsmith"
   case "$TARGET" in windows-*) BIN="$BIN_DIR/cloudsmith.exe" ;; *) BIN="$BIN_DIR/cloudsmith" ;; esac
   METADATA_FILE="$BIN_DIR/.cloudsmith-installation"
-  LOCK_DIR="$FINAL_PARENT/.install.lock"
+  lock_dir="$FINAL_PARENT/.install.lock"
   mkdir -p "$FINAL_PARENT"
 
   waited=0
-  until mkdir "$LOCK_DIR" 2>/dev/null; do
-    [ "$waited" -lt 120 ] || die "timed out waiting for installation lock: $LOCK_DIR"
+  until mkdir "$lock_dir" 2>/dev/null; do
+    [ "$waited" -lt 120 ] || die "timed out waiting for installation lock: $lock_dir"
     sleep 1
     waited=$((waited + 1))
   done
+  # Track the lock for cleanup only once this process owns it, so a waiter
+  # that dies never releases another installer's lock.
+  LOCK_DIR="$lock_dir"
 }
 
 reuse_existing_install() {
diff --git a/tests/install.bats b/tests/install.bats
index 7e96000..f2f935e 100644
--- a/tests/install.bats
+++ b/tests/install.bats
@@ -604,6 +604,29 @@ executable=$bin_dir/cloudsmith"
   [ -x "$final_parent/cloudsmith/cloudsmith" ]
 }
 
+@test "a waiter that dies does not remove another installer's lock" {
+  build_fixture "$FIXTURE_DIR" "1.19.0" "$TEST_TARGET"
+  local final_parent="$INSTALL_ROOT/1.19.0/$TEST_TARGET"
+  mkdir -p "$final_parent/.install.lock"
+
+  "$INSTALL_SH" \
+    --version 1.19.0 \
+    --target "$TEST_TARGET" \
+    --install-root "$INSTALL_ROOT" \
+    --manifest-url "$FIXTURE_URL/manifest.txt" \
+    >"$BATS_TEST_TMPDIR/bg.out" 2>"$BATS_TEST_TMPDIR/bg.err" &
+  local bg_pid=$!
+
+  sleep 2
+  kill -TERM "$bg_pid"
+
+  local bg_status=0
+  wait "$bg_pid" || bg_status=$?
+
+  [ "$bg_status" -ne 0 ]
+  [ -d "$final_parent/.install.lock" ]
+}
+
 @test "concurrent installs of the same version both succeed" {
   build_fixture "$FIXTURE_DIR" "1.19.0" "$TEST_TARGET"