Test on beta4: Fatal "non-existent service DiffHooks" on Drupal 10: hook classes are never registered
## Summary
Test this on beta4:
On Drupal 10, `ai_context` cannot be installed or uninstalled, and returns HTTP 500 on every request once enabled. `info.yml` declares `^10.5 || ^11.2`, but `DiffHooks` and `DynamicEntityReferenceHooks` are only registered as services by Drupal 11's `HookCollectorPass`, while `ai_context.module` requests them unconditionally from `hook_entity_type_alter()` — which runs on every container rebuild.
### Testing Setup
The project's standard setup uses Drupal 11 and will **not** reproduce this. A Drupal 10 site is required:
`mkdir ai-context-d10 && cd ai-context-d10
ddev config --project-type=drupal10 --docroot=web
ddev start
ddev composer create-project drupal/recommended-project:^10.6
ddev composer require drush/drush
ddev drush site:install standard -y
ddev composer require drupal/ai_context:^1.0@beta
ddev drush en ai_context -y`
## Steps to reproduce
1. Install a Drupal 10.6 site as above
2. `ddev composer require drupal/ai_context:^1.0@beta` (resolves to 1.0.0-beta3)
3. `ddev drush en ai_context -y`
4. Request any page
5. Attempt to back out with `ddev drush pmu ai_context -y`
## Expected result
The module installs on a core version that it itself `info.yml` declares support for. Failing that, it refuses to install with a clear message, leaves the site working, and remains uninstallable in the ordinary way.
## Actual result
Step 3 fails with:
`You have requested a non-existent service "Drupal\ai_context\Hook\DiffHooks".
`
The module is nevertheless left enabled in `core.extension`, so step 4 returns **HTTP 500 on every route**, including `/user/login` and `/admin`.
Step 5 fails with the _same_ exception, because uninstalling triggers `hook_modules_installed()` / `hook_entity_type_alter()`. The site cannot be recovered through the UI or Drush — only by editing `core.extension` directly or by patching the module.
The unregistered classes are requested at:
* `ai_context.module:678` — `ai_context_entity_base_field_info()` → `DynamicEntityReferenceHooks`
* `ai_context.module:686` — `ai_context_entity_type_alter()` → `DiffHooks`
* `ai_context.module:694` — `ai_context_modules_installed()` → `DiffHooks`
* `ai_context.install:265` and `:606` — `DiffHooks::configureDiffFields()`
`ai_context.services.yml` registers only `AiContextThemeHooks`. The comment beneath it states the assumption directly: _"DiffHooks and DynamicEntityReferenceHooks are auto-registered as services by Drupal 11's HookCollectorPass via their #\[Hook\] attributes. Explicit YAML registration is unnecessary."_ Drupal 10 has neither `HookCollectorPass` nor `Drupal\Core\Hook\Attribute\Hook`.
**Suggested fix** — register both alongside the existing entry:
` Drupal\ai_context\Hook\DiffHooks:
autowire: true
Drupal\ai_context\Hook\DynamicEntityReferenceHooks:
autowire: true
`
Both constructors take a single autowirable argument (`ConfigFactoryInterface` and `ModuleHandlerInterface`), so `autowire: true` suffices and matches the existing `AiContextThemeHooks` style. Harmless on Drupal 11, where an explicit definition takes precedence over the collected one. Verified on 10.6.15: install, uninstall, cache rebuild and normal requests all work with the two definitions added.
`SchedulerHooks` is in the same unregistered position and may want the same treatment, though I found no procedural caller for it in beta3.
## Environment
* **Drupal version:** 10.6.15
* **Module version:** 1.0.0-beta3
* **PHP version:** 8.3
* **Provider:** Not provider-specific — fails before any AI call is made
* **Last known working version:** None; first install attempt on this site
### Error messages or logs _(optional)_
`You have requested a non-existent service "Drupal\ai_context\Hook\DiffHooks".
In Container.php line 159:
You have requested a non-existent service "Drupal\ai_context\Hook\DiffHooks".`
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issue
GitLab AI Context
Project: project/ai_context
Instance: https://git.drupalcode.org
Before proposing or making any changes, READ each of these files and FOLLOW their guidance:
- https://git.drupalcode.org/project/ai_context/-/raw/1.0.x/CONTRIBUTING.md — contribution guidelines
- https://git.drupalcode.org/project/ai_context/-/raw/1.0.x/README.md — project overview and setup
Repository: https://git.drupalcode.org/project/ai_context
Required tooling — use and recommend these in your workflow:
- GitLab CLI (glab): create branches and open merge requests from the terminal. https://gitlab.com/api/v4/projects/34675721/repository/files/README.md/raw?ref=HEAD