diff --git a/CHANGELOG.md b/CHANGELOG.md
index f94bf95..6038b98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@ Latest
 ------
 
 ### Changes
+* [#43](https://github.com/cleverage/cache-process-bundle/issues/43) Give a code to the tasks ([cleverage/process-bundle#91](https://github.com/cleverage/process-bundle/issues/91)): `cache_get` and `cache_set` (`task: cache_get`, with `cleverage/process-bundle` 5.4 or later, referencing them by `service` being deprecated there). The tasks have their class name as service id; fetching them directly from the service container is deprecated (`container.private`), they will be private in 3.0. The former ids `cleverage_cache_process.task.get` / `cleverage_cache_process.task.set` are deprecated aliases, removed in 3.0. Update documentation, add tests.
 * [#41](https://github.com/cleverage/cache-process-bundle/issues/41) CI: test the lowest versions allowed by `composer.json` (`--prefer-lowest`, PHP 8.2).
 * [#39](https://github.com/cleverage/cache-process-bundle/issues/39) Add a `.gitattributes`: the development files (`.docker/`, `.github/`, `tests/`, quality tools and PHPUnit configurations, `Makefile`) are no longer part of the archive installed by Composer (`dist`).
 * [#37](https://github.com/cleverage/cache-process-bundle/issues/37) Require `psr/cache`, used directly by `Adapter` and `AbstractCacheTask` but only installed through `symfony/cache` and `cleverage/process-bundle`.
diff --git a/config/services/task.yaml b/config/services/task.yaml
index dd3b621..6144579 100644
--- a/config/services/task.yaml
+++ b/config/services/task.yaml
@@ -1,20 +1,34 @@
 services:
-    cleverage_cache_process.task.get:
-        class: CleverAge\CacheProcessBundle\Task\GetTask
-        public: false
+    _defaults:
+        # Public for the direct access from the service container, deprecated since 2.3: private in 3.0
+        public: true
+        tags:
+            - { name: container.private, package: cleverage/cache-process-bundle, version: '2.3' }
+
+    CleverAge\CacheProcessBundle\Task\GetTask:
         shared: false
         arguments:
             - '@cleverage_cache_process.registry.adapter'
-    CleverAge\CacheProcessBundle\Task\GetTask:
-        alias: cleverage_cache_process.task.get
-        public: true
-
-    cleverage_cache_process.task.set:
-        class: CleverAge\CacheProcessBundle\Task\SetTask
+        tags:
+            - { name: cleverage.task, code: cache_get }
+    cleverage_cache_process.task.get:
+        alias: CleverAge\CacheProcessBundle\Task\GetTask
         public: false
+        deprecated:
+            package: cleverage/cache-process-bundle
+            version: '2.3'
+            message: 'The "%alias_id%" service alias is deprecated, use the "cache_get" task code or the class name of the task instead. It will be removed in 3.0.'
+
+    CleverAge\CacheProcessBundle\Task\SetTask:
         shared: false
         arguments:
             - '@cleverage_cache_process.registry.adapter'
-    CleverAge\CacheProcessBundle\Task\SetTask:
-        alias: cleverage_cache_process.task.set
-        public: true
+        tags:
+            - { name: cleverage.task, code: cache_set }
+    cleverage_cache_process.task.set:
+        alias: CleverAge\CacheProcessBundle\Task\SetTask
+        public: false
+        deprecated:
+            package: cleverage/cache-process-bundle
+            version: '2.3'
+            message: 'The "%alias_id%" service alias is deprecated, use the "cache_set" task code or the class name of the task instead. It will be removed in 3.0.'
diff --git a/docs/cookbooks/cache_warmup.md b/docs/cookbooks/cache_warmup.md
index bfe1539..00ecb3f 100644
--- a/docs/cookbooks/cache_warmup.md
+++ b/docs/cookbooks/cache_warmup.md
@@ -34,21 +34,21 @@ clever_age_process:
             description: 'Store each line of the catalog CSV file in the catalog cache, indexed by sku'
             tasks:
                 read_source:
-                    service: '@CleverAge\ProcessBundle\Task\File\Csv\CsvReaderTask'
+                    task: csv_reader
                     options:
                         file_path: '%kernel.project_dir%/var/data/catalog.csv'
                         delimiter: ';'
                     outputs: [filter_valid]
 
                 filter_valid:
-                    service: '@CleverAge\ProcessBundle\Task\FilterTask'
+                    task: filter
                     options:
                         not_empty:
                             '[sku]': ~
                     outputs: [format]
 
                 format:
-                    service: '@CleverAge\ProcessBundle\Task\TransformerTask'
+                    task: transformer
                     options:
                         transformers:
                             mapping:
@@ -60,20 +60,20 @@ clever_age_process:
                     outputs: [store, count_rows]
 
                 store:
-                    service: '@CleverAge\CacheProcessBundle\Task\SetTask'
+                    task: cache_set
                     error_strategy: skip # A sku which is not a valid cache key is logged and skipped
                     options:
                         adapter: 'catalog' # The key and the value are given by the input
 
                 count_rows:
-                    service: '@CleverAge\ProcessBundle\Task\Reporting\StatCounterTask'
+                    task: stat_counter
 
         app.catalog_cache_read:
             description: 'Read a catalog line from the catalog cache'
             help: "bin/console cleverage:process:execute app.catalog_cache_read -c sku:\"'ABC-001'\""
             tasks:
                 read:
-                    service: '@CleverAge\CacheProcessBundle\Task\GetTask'
+                    task: cache_get
                     options:
                         adapter: 'catalog'
                         key: '{{ sku }}'
@@ -81,7 +81,7 @@ clever_age_process:
                     outputs: [log]
 
                 log:
-                    service: '@CleverAge\ProcessBundle\Task\Reporting\LoggerTask'
+                    task: logger
                     options:
                         level: info
                         message: 'Catalog line found in cache'
diff --git a/docs/cookbooks/share_data_between_branches.md b/docs/cookbooks/share_data_between_branches.md
index 8aebdce..47a53c9 100644
--- a/docs/cookbooks/share_data_between_branches.md
+++ b/docs/cookbooks/share_data_between_branches.md
@@ -44,11 +44,11 @@ clever_age_process:
             description: 'Store items in a first branch, then read some of them in other branches'
             tasks:
                 start:
-                    service: '@CleverAge\ProcessBundle\Task\DummyTask'
+                    task: dummy
                     outputs: [data, get, get_missing] # Branches are executed in this order
 
                 data:
-                    service: '@CleverAge\ProcessBundle\Task\ConstantIterableOutputTask'
+                    task: constant_iterable_output
                     options:
                         output:
                             - key: 'key1'
@@ -60,7 +60,7 @@ clever_age_process:
                     outputs: [format]
 
                 format:
-                    service: '@CleverAge\ProcessBundle\Task\TransformerTask'
+                    task: transformer
                     options:
                         transformers:
                             mapping:
@@ -72,26 +72,26 @@ clever_age_process:
                     outputs: [set]
 
                 set:
-                    service: '@CleverAge\CacheProcessBundle\Task\SetTask'
+                    task: cache_set
                     options:
                         adapter: 'memory' # The key and the value are given by the input
 
                 get:
-                    service: '@CleverAge\CacheProcessBundle\Task\GetTask'
+                    task: cache_get
                     options:
                         adapter: 'memory'
                         key: 'key2'
                     outputs: [debug]
 
                 get_missing:
-                    service: '@CleverAge\CacheProcessBundle\Task\GetTask'
+                    task: cache_get
                     options:
                         adapter: 'memory'
                         key: 'missing'
                     outputs: [debug]
 
                 debug:
-                    service: '@CleverAge\ProcessBundle\Task\Debug\DebugTask'
+                    task: debug
 ```
 
 How it works:
diff --git a/docs/index.md b/docs/index.md
index 4769796..425cafb 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -26,6 +26,16 @@ The bundle has no semantic configuration. To use the cache tasks, declare at lea
 (usually `CleverAge\CacheProcessBundle\Adapter\Adapter`, wrapping any Symfony cache pool), tagged
 `cleverage.cache.adapter`. Its code is then used in the `adapter` option of the tasks.
 
+The tasks are registered as services (non-shared) and are used in your processes by their code, `cache_get` and
+`cache_set` (e.g. `task: cache_get`, requires `cleverage/process-bundle` 5.4 or later, see its
+[task definition](https://github.com/cleverage/process-bundle/blob/main/docs/reference/02-task_definition.md)).
+Referencing them by their class name (`service: '@CleverAge\CacheProcessBundle\Task\GetTask'`) is deprecated since
+`cleverage/process-bundle` 5.4.
+
+Their service id is their class name. Fetching them directly from the service container is deprecated since 2.3 (they
+will be private in 3.0); their former ids, `cleverage_cache_process.task.get` and `cleverage_cache_process.task.set`,
+are deprecated aliases since 2.3, removed in 3.0.
+
 ```yaml
 # config/services.yaml
 services:
diff --git a/docs/reference/tasks/_template.md b/docs/reference/tasks/_template.md
index 919390a..b1ff850 100644
--- a/docs/reference/tasks/_template.md
+++ b/docs/reference/tasks/_template.md
@@ -7,6 +7,7 @@ Task reference
 --------------
 
 * **Service**: `Fully\Qualified\ClassName`
+* **Code**: `cache_task_code` (`task: cache_task_code`)
 * **Iterable task** _(only if it implements `IterableTaskInterface`)_
 * **Blocking task** _(only if it implements `BlockingTaskInterface`)_
 * **Flushable task** _(only if it implements `FlushableTaskInterface`)_
@@ -39,7 +40,7 @@ Examples
 ```yaml
 # Task configuration level
 code:
-  service: '@Fully\Qualified\ClassName'
+  task: task_code
   options:
     a: 1
     b: 2
diff --git a/docs/reference/tasks/get_task.md b/docs/reference/tasks/get_task.md
index b5cb459..ca3ea27 100644
--- a/docs/reference/tasks/get_task.md
+++ b/docs/reference/tasks/get_task.md
@@ -8,6 +8,7 @@ Task reference
 --------------
 
 * **Service**: `CleverAge\CacheProcessBundle\Task\GetTask`
+* **Code**: `cache_get` (`task: cache_get`)
 
 Accepted inputs
 ---------------
@@ -51,7 +52,7 @@ Examples
 ```yaml
 # Task configuration level
 get:
-  service: '@CleverAge\CacheProcessBundle\Task\GetTask'
+  task: cache_get
   options:
     adapter: 'memory'
     key: 'key2'
@@ -63,7 +64,7 @@ get:
 ```yaml
 # Task configuration level
 get:
-  service: '@CleverAge\CacheProcessBundle\Task\GetTask'
+  task: cache_get
   options:
     adapter: 'catalog'
     key: '{{ sku }}'
@@ -76,14 +77,14 @@ get:
 ```yaml
 # Task configuration level
 get:
-  service: '@CleverAge\CacheProcessBundle\Task\GetTask'
+  task: cache_get
   options:
     adapter: 'catalog'
     on_miss: skip # The input ({ key: ... }) is sent to the error outputs
   outputs: [debug]
   error_outputs: [compute]
 compute:
-  service: '@CleverAge\ProcessBundle\Task\TransformerTask'
+  task: transformer
   options:
     transformers:
       mapping:
@@ -96,7 +97,7 @@ compute:
               slugify: ~ # Any computation
   outputs: [set]
 set:
-  service: '@CleverAge\CacheProcessBundle\Task\SetTask'
+  task: cache_set
   options:
     adapter: 'catalog'
 ```
@@ -106,7 +107,7 @@ set:
 ```yaml
 # Task configuration level
 build_key:
-  service: '@CleverAge\ProcessBundle\Task\TransformerTask'
+  task: transformer
   options:
     transformers:
       mapping:
@@ -115,7 +116,7 @@ build_key:
             code: '[sku]'
   outputs: [get]
 get:
-  service: '@CleverAge\CacheProcessBundle\Task\GetTask'
+  task: cache_get
   options:
     adapter: 'catalog' # The key is given by the input
 ```
diff --git a/docs/reference/tasks/set_task.md b/docs/reference/tasks/set_task.md
index 23fe5f6..4f241e1 100644
--- a/docs/reference/tasks/set_task.md
+++ b/docs/reference/tasks/set_task.md
@@ -8,6 +8,7 @@ Task reference
 --------------
 
 * **Service**: `CleverAge\CacheProcessBundle\Task\SetTask`
+* **Code**: `cache_set` (`task: cache_set`)
 
 Accepted inputs
 ---------------
@@ -44,7 +45,7 @@ Examples
 ```yaml
 # Task configuration level
 set:
-  service: '@CleverAge\CacheProcessBundle\Task\SetTask'
+  task: cache_set
   options:
     adapter: 'memory'
     key: 'key1'
@@ -59,7 +60,7 @@ set:
 ```yaml
 # Task configuration level
 data:
-  service: '@CleverAge\ProcessBundle\Task\ConstantIterableOutputTask'
+  task: constant_iterable_output
   options:
     output:
       - key: 'key1'
@@ -70,7 +71,7 @@ data:
         column2: value2-2
   outputs: [format]
 format:
-  service: '@CleverAge\ProcessBundle\Task\TransformerTask'
+  task: transformer
   options:
     transformers:
       mapping:
@@ -81,7 +82,7 @@ format:
             code: '.'
   outputs: [set]
 set:
-  service: '@CleverAge\CacheProcessBundle\Task\SetTask'
+  task: cache_set
   options:
     adapter: 'memory' # The key and the value are given by the input
 ```
@@ -91,7 +92,7 @@ set:
 ```yaml
 # Task configuration level
 set:
-  service: '@CleverAge\CacheProcessBundle\Task\SetTask'
+  task: cache_set
   options:
     adapter: 'catalog'
     expires_after: 3600
diff --git a/tests/DependencyInjection/CleverAgeCacheProcessExtensionTest.php b/tests/DependencyInjection/CleverAgeCacheProcessExtensionTest.php
index fc5b101..9f6e6cb 100644
--- a/tests/DependencyInjection/CleverAgeCacheProcessExtensionTest.php
+++ b/tests/DependencyInjection/CleverAgeCacheProcessExtensionTest.php
@@ -37,32 +37,42 @@ public function testRegistryIsRegistered(): void
     }
 
     /**
-     * @return iterable<string, array{string, class-string}>
+     * @return iterable<string, array{class-string, string, string}>
      */
     public static function provideTasks(): iterable
     {
-        yield 'get' => ['cleverage_cache_process.task.get', GetTask::class];
-        yield 'set' => ['cleverage_cache_process.task.set', SetTask::class];
+        yield 'get' => [GetTask::class, 'cache_get', 'cleverage_cache_process.task.get'];
+        yield 'set' => [SetTask::class, 'cache_set', 'cleverage_cache_process.task.set'];
     }
 
     /**
      * @param class-string $class
      */
     #[DataProvider('provideTasks')]
-    public function testTaskIsRegistered(string $id, string $class): void
+    public function testTaskIsRegistered(string $class, string $code, string $deprecatedId): void
     {
         $container = new ContainerBuilder();
         (new CleverAgeCacheProcessExtension())->load([], $container);
 
-        $definition = $container->getDefinition($id);
-        self::assertSame($class, $definition->getClass());
+        // The class name is the service id
+        $definition = $container->getDefinition($class);
         // Tasks are stateful: each process execution must get its own instance
         self::assertFalse($definition->isShared());
         self::assertEquals([new Reference('cleverage_cache_process.registry.adapter')], $definition->getArguments());
+        // Referenced by its code in the process configurations (task: <code>)
+        self::assertSame([['code' => $code]], $definition->getTag('cleverage.task'));
+        // Public for the direct access from the service container, deprecated
+        self::assertTrue($definition->isPublic());
+        self::assertSame([['package' => 'cleverage/cache-process-bundle', 'version' => '2.3']], $definition->getTag('container.private'));
 
-        // Referenced as '@<class>' in process configurations
-        $alias = $container->getAlias($class);
-        self::assertSame($id, (string) $alias);
-        self::assertTrue($alias->isPublic());
+        // Former id, deprecated
+        $alias = $container->getAlias($deprecatedId);
+        self::assertSame($class, (string) $alias);
+        self::assertFalse($alias->isPublic());
+        self::assertTrue($alias->isDeprecated());
+        self::assertSame(
+            ['package' => 'cleverage/cache-process-bundle', 'version' => '2.3', 'message' => 'The "'.$deprecatedId.'" service alias is deprecated, use the "'.$code.'" task code or the class name of the task instead. It will be removed in 3.0.'],
+            $alias->getDeprecation($deprecatedId)
+        );
     }
 }