diff --git a/.forgejo/workflows/e2e-probe.yml b/.forgejo/workflows/e2e-probe.yml
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+++ b/.forgejo/workflows/e2e-probe.yml
@@ -0,0 +1,48 @@
+name: E2E probe
+# Branche jetable ci/e2e-probe : diagnostic de l'environnement de job pour decider
+# comment porter tests/e2e/run.sh en CI (socket Docker propagee ? chemin du checkout
+# aligne cote hote pour les bind-mounts des conteneurs freres ?). A supprimer ensuite.
+on:
+  push:
+    branches: ['ci/e2e-probe']
+
+jobs:
+  probe:
+    runs-on: docker
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Contexte du job (chemins + socket)
+        run: |
+          echo "PWD=$(pwd)"
+          echo "GITHUB_WORKSPACE=$GITHUB_WORKSPACE"
+          echo "DOCKER_HOST=${DOCKER_HOST:-<vide>}"
+          echo "--- socket presente dans le job ? ---"
+          ls -la /var/run/docker.sock || echo "PAS_DE_SOCKET"
+          echo "--- mountinfo (workspace) ---"
+          grep -iE 'work' /proc/self/mountinfo || true
+
+      - name: CLI docker + acces au demon
+        run: |
+          set -e
+          curl -fsSL https://download.docker.com/linux/static/stable/x86_64/docker-27.3.1.tgz -o /tmp/d.tgz
+          tar -xzf /tmp/d.tgz -C /usr/local/bin --strip-components=1 docker/docker
+          docker --version
+          if docker info --format 'Server={{.ServerVersion}} Containers={{.Containers}}'; then
+            echo "SOCKET_OK"
+          else
+            echo "SOCKET_KO"
+            exit 1
+          fi
+
+      - name: Test de translation de chemin (bind-mount frere)
+        run: |
+          set -e
+          MARK="probe_$(cat /proc/sys/kernel/random/uuid)"
+          echo "$MARK" > "$GITHUB_WORKSPACE/__probe_marker"
+          echo "marqueur ecrit dans le workspace du job : $MARK"
+          if docker run --rm -v "$GITHUB_WORKSPACE:/x" alpine sh -c 'cat /x/__probe_marker 2>/dev/null'; then
+            echo "PATH_ALIGNED"
+          else
+            echo "PATH_NOT_ALIGNED"
+          fi