feat(phase-c): resolve reflection/downcast phase-b TODOs

Resolve category F phase-b TODOs (class-string, instanceof, get_class,
method_exists, __FILE__, Reflection API, downcast).

- VcsRepository: dispatch drivers through a VcsDriverKind enum
  (instantiate/supports/php_class_name) and add constructors to the
  concrete VCS drivers
- repository downcasts via RepositoryInterfaceHandle::downcast_rc and
  as_any (init/show commands, vcs ValidatingArrayLoader)
- BaseCommand::is_self_update_command override replaces an instanceof
- Factory::create narrows PartialComposer to ComposerHandle via as_full
- InstalledVersions gains set_self_dir/set_installed_is_local_dir,
  replacing Reflection-based static property mutation
- ClassLoader::as_array_iter ports the PHP (array) cast
- drop the unnecessary __FILE__ phar branch in self-update

application get_class(command) reclassified TODO(plugin); buffer_io
StreamableInputInterface downcast and the ValidatingArrayLoader trait
redesign left as tracked TODOs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

1 files changed, 2 insertions, 8 deletions

diff --git a/crates/shirabe/src/repository/filesystem_repository.rs b/crates/shirabe/src/repository/filesystem_repository.rs
index 4e752d9..bb78886 100644
--- a/crates/shirabe/src/repository/filesystem_repository.rs
+++ b/crates/shirabe/src/repository/filesystem_repository.rs
@@ -341,14 +341,8 @@ impl FilesystemRepository {
                 // make sure the selfDir matches the expected data at runtime if the class was loaded from the vendor dir, as it may have been
                 // loaded from the Composer sources, causing packages to appear twice in that case if the installed.php is loaded in addition to the
                 // in memory loaded data from above
-                // TODO(phase-b): Reflection API on static properties — confirm porting approach with user
-                let _attempt: Result<()> = (|| -> Result<()> {
-                    todo!(
-                        "ReflectionProperty(Composer\\InstalledVersions::class, 'selfDir')->setValue(null, strtr($repoDir, '\\\\', '/'))"
-                    );
-                    // (the second reflection block sets installedIsLocalDir = true)
-                })();
-                // PHP: catches \ReflectionException and rethrows if not "Property does not exist"
+                InstalledVersions::set_self_dir(repo_dir.replace('\\', "/"));
+                InstalledVersions::set_installed_is_local_dir(true);
             }
         }