diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 28a5c4fa9..c60d2fb6f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -18,6 +18,18 @@ docker compose --profile=dev up
 
 The app should be available at [http://localhost:4200](http://localhost:4200)
 
+> **Nx state in Docker:** the containers keep their Nx cache and project
+> graph in a dedicated `dev-nx` Docker volume, isolated from the host's
+> `.nx/` directory. This prevents the Linux/Alpine containers and your
+> host (e.g. macOS) from sharing — and corrupting — the same Nx store. To
+> reset only the containers' Nx state, run:
+>
+> ```shell
+> docker volume ls -q --filter name='dev-nx$' | xargs docker volume rm -f
+> ```
+>
+> For a full reset (including the database), use `docker compose down -v`.
+
 ## Migrating an existing checkout from npm to pnpm
 
 If you previously worked with npm, run the one-shot migration script from the
diff --git a/docker-compose.yml b/docker-compose.yml
index 244e9c1e2..839378375 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -31,6 +31,7 @@ services:
     volumes:
       - .:/packmind
       - dev-node_modules:/packmind/node_modules
+      - dev-nx:/packmind/.nx
       - dev-nx-sock:/nx-sock
     environment:
       <<: *nx-env
@@ -114,6 +115,7 @@ services:
     volumes:
       - .:/packmind
       - dev-node_modules:/packmind/node_modules
+      - dev-nx:/packmind/.nx
       - dev-corepack-cache:/root/.cache/node/corepack
       - dev-pnpm-store:/root/.local/share/pnpm
 
@@ -137,6 +139,7 @@ services:
     volumes:
       - .:/packmind
       - dev-node_modules:/packmind/node_modules
+      - dev-nx:/packmind/.nx
       - dev-corepack-cache:/root/.cache/node/corepack
       - dev-pnpm-store:/root/.local/share/pnpm
     depends_on:
@@ -177,6 +180,7 @@ services:
     volumes:
       - .:/packmind
       - dev-node_modules:/packmind/node_modules
+      - dev-nx:/packmind/.nx
       - dev-dist:/packmind/dist
       - dev-tmp:/packmind/tmp
       - dev-nx-sock:/nx-sock
@@ -231,6 +235,7 @@ services:
     volumes:
       - .:/packmind
       - dev-node_modules:/packmind/node_modules
+      - dev-nx:/packmind/.nx
       - dev-dist:/packmind/dist
       - dev-tmp:/packmind/tmp
       - dev-nx-sock:/nx-sock
@@ -276,6 +281,7 @@ services:
     volumes:
       - .:/packmind
       - dev-node_modules:/packmind/node_modules
+      - dev-nx:/packmind/.nx
       - dev-dist:/packmind/dist
       - dev-tmp:/packmind/tmp
       - dev-nx-sock:/nx-sock
@@ -297,6 +303,7 @@ services:
 
 volumes:
   dev-nx-sock:
+  dev-nx:
   dev-postgres-data:
   dev-redis-data:
   dev-pgadmin:
diff --git a/downgrade_node22.sh b/downgrade_node22.sh
index 480da3001..c7c32d621 100755
--- a/downgrade_node22.sh
+++ b/downgrade_node22.sh
@@ -10,6 +10,9 @@ echo "⏹️  Arrêt des containers Docker..."
 docker compose down
 echo "🗑️  Suppression des volumes Docker dev-nx-sock et dev-node_modules..."
 docker volume rm dev-nx-sock dev-node_modules 2>/dev/null || true
+echo "🗑️  Suppression du volume Nx des containers (dev-nx)..."
+nx_volumes="$(docker volume ls -q --filter name='dev-nx$')"
+[ -n "$nx_volumes" ] && docker volume rm -f $nx_volumes 2>/dev/null || true
 
 # 2. Reset Nx (tant que node_modules et .nx existent encore)
 echo ""
diff --git a/migrate_node24.sh b/migrate_node24.sh
index 3a28fc793..8c0392f05 100755
--- a/migrate_node24.sh
+++ b/migrate_node24.sh
@@ -10,6 +10,9 @@ echo "⏹️  Arrêt des containers Docker..."
 docker compose down
 echo "🗑️  Suppression des volumes Docker dev-nx-sock et dev-node_modules..."
 docker volume rm dev-nx-sock dev-node_modules 2>/dev/null || true
+echo "🗑️  Suppression du volume Nx des containers (dev-nx)..."
+nx_volumes="$(docker volume ls -q --filter name='dev-nx$')"
+[ -n "$nx_volumes" ] && docker volume rm -f $nx_volumes 2>/dev/null || true
 
 # 2. Reset Nx (tant que node_modules et .nx existent encore)
 echo ""