PHPStan D10 failures: ChatMemoryPluginBase extends ConfigurablePluginBase, which only exists in core 11.3+
PHPStan fails on the Drupal 10 job for `1.5.x`. Most of the errors trace back to a single root cause in the new ChatMemory plugin type, plus two unrelated stragglers.
## Summary
`Drupal\ai\Base\ChatMemoryPluginBase` (added in `fd0c9a88`, [#3586539](https://www.drupal.org/project/ai/issues/3586539)) extends `Drupal\Core\Plugin\ConfigurablePluginBase`. That class does **not** exist in Drupal 10.
Verified against core branches:
| Core branch | `Drupal\Core\Plugin\ConfigurablePluginBase` | `Drupal\Core\Plugin\ConfigurableTrait` |
|---|---|---|
| `10.5.x` | absent | absent |
| `11.0.x` / `11.1.x` / `11.2.x` | absent | absent |
| `11.3.x` / `11.4.x` | present | present |
`ai.info.yml` declares `core_version_requirement: ^10.5 || ^11.2`, so this breaks **both** the lowest supported Drupal 10 and the lowest supported Drupal 11 (11.2). Drupal 10 is only where CI happens to notice it first.
Note that `Drupal\Component\Plugin\ConfigurableTrait` is also absent from 10.5 — the usual fallback is not available either. The base class has to implement `ConfigurableInterface` by hand.
## PHPStan output
```
------ -------------------------------------------------------------------------------
Line modules/ai_assistant_api/src/Plugin/ChatMemory/PrivateTempStoreChatMemory.php
------ -------------------------------------------------------------------------------
16 Non-abstract class
Drupal\ai_assistant_api\Plugin\ChatMemory\PrivateTempStoreChatMemory
contains abstract method getConfiguration() from interface
Drupal\Component\Plugin\ConfigurableInterface.
16 Non-abstract class
Drupal\ai_assistant_api\Plugin\ChatMemory\PrivateTempStoreChatMemory
contains abstract method setConfiguration() from interface
Drupal\Component\Plugin\ConfigurableInterface.
------ -------------------------------------------------------------------------------
------ -----------------------------------------------------------------------------------
Line modules/ai_assistant_api/src/Plugin/ChatMemory/PrivateTempStorePoolChatMemory.php
------ -----------------------------------------------------------------------------------
19 Non-abstract class
Drupal\ai_assistant_api\Plugin\ChatMemory\PrivateTempStorePoolChatMemory
contains abstract method getConfiguration() from interface
Drupal\Component\Plugin\ConfigurableInterface.
19 Non-abstract class
Drupal\ai_assistant_api\Plugin\ChatMemory\PrivateTempStorePoolChatMemory
contains abstract method setConfiguration() from interface
Drupal\Component\Plugin\ConfigurableInterface.
------ -----------------------------------------------------------------------------------
------ ----------------------------------------------------------------------------
Line modules/ai_assistant_api/src/Plugin/ChatMemory/TempStoreChatMemoryBase.php
------ ----------------------------------------------------------------------------
82 Call to an undefined static method
Drupal\ai\Base\ChatMemoryPluginBase::__construct().
------ ----------------------------------------------------------------------------
------ --------------------------------------------------------------------
Line modules/ai_assistant_api/tests/src/Unit/AgentRunnerTest.php
------ --------------------------------------------------------------------
19 Attribute class PHPUnit\Framework\Attributes\CoversMethod does not
exist.
------ --------------------------------------------------------------------
------ ---------------------------------------------------------------
Line scripts/generate-provider-matrix.php
------ ---------------------------------------------------------------
856 Function http_request invoked with 1 parameter, 2-5 required.
------ ---------------------------------------------------------------
------ ---------------------------------------------------------------------
Line src/Base/ChatMemoryPluginBase.php
------ ---------------------------------------------------------------------
17 Class Drupal\ai\Base\ChatMemoryPluginBase extends unknown class
Drupal\Core\Plugin\ConfigurablePluginBase.
------ ---------------------------------------------------------------------
------ ---------------------------------------------------------------------
Line tests/modules/ai_test/src/Plugin/ChatMemory/StateChatMemory.php
------ ---------------------------------------------------------------------
16 Non-abstract class Drupal\ai_test\Plugin\ChatMemory\StateChatMemory
contains abstract method defaultConfiguration() from interface
Drupal\Component\Plugin\ConfigurableInterface.
16 Non-abstract class Drupal\ai_test\Plugin\ChatMemory\StateChatMemory
contains abstract method getConfiguration() from interface
Drupal\Component\Plugin\ConfigurableInterface.
16 Non-abstract class Drupal\ai_test\Plugin\ChatMemory\StateChatMemory
contains abstract method setConfiguration() from interface
Drupal\Component\Plugin\ConfigurableInterface.
37 Call to an undefined static method
Drupal\ai\Base\ChatMemoryPluginBase::__construct().
```
## Breakdown
### 1. Root cause — unresolvable parent class (5 of the 7 reported files)
`src/Base/ChatMemoryPluginBase.php:17` is the actual defect. Everything below cascades from PHPStan being unable to resolve the parent:
- `PrivateTempStoreChatMemory:16`, `PrivateTempStorePoolChatMemory:19`, `StateChatMemory:16` — the `ConfigurableInterface` methods PHPStan cannot see inherited (`defaultConfiguration()`, `getConfiguration()`, `setConfiguration()`) are reported as unimplemented abstract methods.
- `TempStoreChatMemoryBase:82` and `StateChatMemory:37` — `parent::__construct(...)` cannot be resolved, so PHPStan reports it as an undefined static method call.
This is not merely a static-analysis artifact. On Drupal 10.5 and 11.2 the class genuinely does not exist, so any of these plugins would fatal at runtime.
**Suggested fix:** make `ChatMemoryPluginBase` extend `Drupal\Core\Plugin\PluginBase` and implement `Drupal\Component\Plugin\ConfigurableInterface` directly — `defaultConfiguration()`, `getConfiguration()`, `setConfiguration()`, and a constructor that calls `setConfiguration($configuration)`. That is portable across 10.5 through 11.4. Alternatives, if the team prefers: raise `core_version_requirement` to `^11.3` (drops Drupal 10 and 11.2 support entirely — a much bigger decision), or ship a compatibility shim.
### 2. `AgentRunnerTest.php:19` — PHPUnit attribute not available on Drupal 10
`#[CoversMethod]` was introduced in PHPUnit 11.2. Core requires:
- `10.5.x` → `phpunit/phpunit: ^9.6.13`
- `11.2.x` → `phpunit/phpunit: ^10.5.19 || ^11.5.3`
So the attribute is unavailable on Drupal 10 (PHPUnit 9.6) and only conditionally available on Drupal 11.2. The file already carries a `@coversDefaultClass` annotation, so the simplest fix is to drop the `#[CoversMethod]` attribute and its `use` statement, or replace it with the annotation form, until the minimum PHPUnit version supports it.
### 3. `scripts/generate-provider-matrix.php:856` — name collision with pecl_http
The script defines its own `function http_request(string $url, array $headers = []): array` and calls it with 1 argument from `drupal_org_get()`. PHPStan resolves the name against its bundled stub for the pecl_http extension function `http_request(int $method, string $url, ...)`, which takes 2-5 parameters, and flags the call.
The code itself is correct; the function name is the problem. Renaming it to something namespaced-by-convention (for example `ai_matrix_http_request()`) removes the collision. This one is not Drupal-10-specific and could be split into its own issue if preferred.
## Steps to reproduce
1. Check out `1.5.x`.
2. Run the PHPStan job against Drupal 10.5.
## Expected result
PHPStan passes on all supported core versions declared in `ai.info.yml`.
## Actual result
11 errors across 7 files, as above.
## Environment
- Module version: `1.5.x-dev`
- Affected core versions: 10.5 and 11.2 (both within the declared `^10.5 || ^11.2` range)
- Unaffected: 11.3+
Related: [#3586539](https://www.drupal.org/project/ai/issues/3586539) added the ChatMemory plugin type.
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