diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 2e32a13..567cbb6 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -22,13 +22,27 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
+  gitlink-freshness:
+    # Gate: every tracked gitlink must be at the tip of its sibling repo's
+    # default branch, so the workspace pointers can't silently drift behind
+    # merged work. Uses ls-remote (no sibling checkout needed).
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check gitlinks are at their default-branch tips
+        env:
+          GH_TOKEN: ${{ secrets.SIBLING_CHECKOUT_TOKEN || secrets.GITHUB_TOKEN }}
+        run: |
+          git config --global url."https://x-access-token:${GH_TOKEN}@github.com/personalrobotics/".insteadOf "https://github.com/personalrobotics/"
+          ./scripts/check_gitlink_freshness.sh
+
   integration:
     runs-on: ubuntu-latest
     timeout-minutes: 45
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.12"]
+        python-version: ["3.11", "3.12"]
     steps:
       - name: Checkout robot-code
         uses: actions/checkout@v4
@@ -74,7 +88,7 @@ jobs:
         run: |
           set +e
           fail=0
-          for d in asset_manager geodude geodude_assets mj_environment mj_manipulator mj_viser prl_assets pycbirrt tsr; do
+          for d in ada_assets ada_mj asset_manager geodude geodude_assets mj_environment mj_manipulator mj_viser prl_assets pycbirrt tsr; do
             if [ -d "$d/tests" ]; then
               echo "::group::$d tests"
               (cd "$d" && uv run pytest tests/ -q) || fail=1
@@ -88,10 +102,10 @@ jobs:
 
       - name: Import smoke check
         run: |
-          uv run python -c "import asset_manager, geodude, geodude_assets, mj_environment, mj_manipulator, mj_viser, prl_assets, pycbirrt, tsr; print('all imports OK')"
+          uv run python -c "import ada_assets, ada_mj, asset_manager, geodude, geodude_assets, mj_environment, mj_manipulator, mj_viser, prl_assets, pycbirrt, tsr; print('all imports OK')"
 
   notify-on-nightly-failure:
-    needs: integration
+    needs: [integration, gitlink-freshness]
     if: failure() && github.event_name == 'schedule'
     runs-on: ubuntu-latest
     permissions:
diff --git a/scripts/check_gitlink_freshness.sh b/scripts/check_gitlink_freshness.sh
new file mode 100755
index 0000000..c4632ad
--- /dev/null
+++ b/scripts/check_gitlink_freshness.sh
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+# Fail if any tracked gitlink (submodule-style commit pointer) is not at the
+# tip of its sibling repo's DEFAULT branch. This is what keeps the workspace
+# pointers from silently drifting behind merged work.
+#
+# It compares the committed gitlink SHA against `git ls-remote <url> HEAD`, the
+# remote's default-branch tip -- so it is correct for repos whose default is not
+# `main` (e.g. ada_feeding -> ros2-devel) without any per-repo configuration.
+#
+# No sibling checkout is required (uses ls-remote), so it is cheap to run in CI.
+# Sibling URLs are derived by convention: github.com/personalrobotics/<dir>.
+#
+# Usage: scripts/check_gitlink_freshness.sh
+# Exit:  0 = all current; 1 = drift or lookup failure (fail closed).
+set -euo pipefail
+
+cd "$(git rev-parse --show-toplevel)"
+
+ORG_URL="https://github.com/personalrobotics"
+stale=0
+errors=0
+
+printf "%-22s %-12s %-12s %s\n" "GITLINK" "RECORDED" "REMOTE-TIP" "STATUS"
+printf -- "%.0s-" {1..64}; printf "\n"
+
+# Each gitlink: mode 160000, "<sha> <path>".
+while read -r sha path; do
+    url="$ORG_URL/$(basename "$path")"
+    tip="$(git ls-remote "$url" HEAD 2>/dev/null | awk 'NR==1{print $1}')"
+    if [ -z "$tip" ]; then
+        printf "%-22s %-12s %-12s %s\n" "$path" "${sha:0:11}" "??" "LOOKUP-FAILED"
+        errors=1
+        continue
+    fi
+    if [ "$sha" = "$tip" ]; then
+        printf "%-22s %-12s %-12s %s\n" "$path" "${sha:0:11}" "${tip:0:11}" "ok"
+    else
+        printf "%-22s %-12s %-12s %s\n" "$path" "${sha:0:11}" "${tip:0:11}" "STALE"
+        stale=1
+    fi
+done < <(git ls-tree -r HEAD | awk '$2=="commit"{print $3, $4}')
+
+echo
+if [ "$errors" -ne 0 ]; then
+    echo "ERROR: could not resolve one or more sibling default branches (see LOOKUP-FAILED)."
+    exit 1
+fi
+if [ "$stale" -ne 0 ]; then
+    echo "Gitlinks are behind their default-branch tips. To fix, for each STALE repo:"
+    echo "  (cd <repo> && git fetch origin && git checkout \"\$(git rev-parse origin/HEAD)\")"
+    echo "  git add <repo> && git commit"
+    exit 1
+fi
+echo "All gitlinks are at their default-branch tips."
diff --git a/setup.sh b/setup.sh
index 1f25f79..0fecc72 100755
--- a/setup.sh
+++ b/setup.sh
@@ -4,7 +4,18 @@
 # the shared Python environment.
 set -euo pipefail
 
+# Every sibling repo the workspace tracks. The ADA repos (ada_assets, ada_mj)
+# are uv workspace members, so omitting them breaks `uv sync` on a fresh clone;
+# the ROS 2 repos (ada_ros2, ada_feeding, articutool_ros2) are not Python
+# packages but are part of the workspace. This list must stay in sync with the
+# tracked gitlinks — scripts/check_gitlink_freshness.sh gates that they are not
+# stale. ada_feeding's default branch is ros2-devel (git clone picks it up).
 REPOS=(
+    "https://github.com/personalrobotics/ada_assets"
+    "https://github.com/personalrobotics/ada_feeding"
+    "https://github.com/personalrobotics/ada_mj"
+    "https://github.com/personalrobotics/ada_ros2"
+    "https://github.com/personalrobotics/articutool_ros2"
     "https://github.com/personalrobotics/asset_manager"
     "https://github.com/personalrobotics/geodude"
     "https://github.com/personalrobotics/geodude_assets"