fix(plugin): make proxy stub property access an explicit error

A proxy stub declares none of the real class's instance properties, and the
`__get`/`__set` forwarders were emitted only for classes that declare a public
one. Every other property access therefore got PHP's own answer for an
undeclared property — null on a read, a dynamic property on a write — so plugin
code reading state the entity holds ran on with null and failed somewhere else
entirely, or not at all.

Emit the forwarders on every root stub, add `__isset`/`__unset` alongside them
so `isset()` cannot answer false silently either, and serve all four from one
dispatcher that answers the state the Rust-side entity exposes and rejects every
other name.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

9 files changed, 180 insertions, 11 deletions

diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/Config.php b/crates/shirabe-php-rpc/php/stubs/Composer/Config.php
index bccb8dcb..2424e5e3 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/Config.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/Config.php
@@ -51,6 +51,26 @@ class Config implements \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct(bool $useEnvironment = true, ?string $baseDir = null)
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, [$useEnvironment, $baseDir]]);
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/Downloader/DownloadManager.php b/crates/shirabe-php-rpc/php/stubs/Composer/Downloader/DownloadManager.php
index 3828ac4a..198bb4d0 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/Downloader/DownloadManager.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/Downloader/DownloadManager.php
@@ -51,6 +51,26 @@ class DownloadManager implements \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct(IOInterface $io, bool $preferSource = false, ?Filesystem $filesystem = null)
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, [$io, $preferSource, $filesystem]]);
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/EventDispatcher/EventDispatcher.php b/crates/shirabe-php-rpc/php/stubs/Composer/EventDispatcher/EventDispatcher.php
index e2369ed2..be9e8f8d 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/EventDispatcher/EventDispatcher.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/EventDispatcher/EventDispatcher.php
@@ -53,6 +53,26 @@ class EventDispatcher implements \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct(PartialComposer $composer, IOInterface $io, ?ProcessExecutor $process = null)
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, [$composer, $io, $process]]);
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/IO/BaseIO.php b/crates/shirabe-php-rpc/php/stubs/Composer/IO/BaseIO.php
index ecb4db2f..e32e8ee3 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/IO/BaseIO.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/IO/BaseIO.php
@@ -48,6 +48,26 @@ abstract class BaseIO implements IOInterface, \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct()
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, []]);
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/Installer/InstallationManager.php b/crates/shirabe-php-rpc/php/stubs/Composer/Installer/InstallationManager.php
index 7f41f6b9..6d3e9cf9 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/Installer/InstallationManager.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/Installer/InstallationManager.php
@@ -58,6 +58,26 @@ class InstallationManager implements \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct(Loop $loop, IOInterface $io, ?EventDispatcher $eventDispatcher = null)
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, [$loop, $io, $eventDispatcher]]);
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/Package/BasePackage.php b/crates/shirabe-php-rpc/php/stubs/Composer/Package/BasePackage.php
index 9fca286a..65eebd56 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/Package/BasePackage.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/Package/BasePackage.php
@@ -48,6 +48,26 @@ abstract class BasePackage implements PackageInterface, \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct(string $name)
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, [$name]]);
@@ -76,17 +96,6 @@ abstract class BasePackage implements PackageInterface, \ShirabeRustStub
     ];
     public static $stabilities = self::STABILITIES;
 
-    /** The real class declares public properties; every access forwards to the entity. */
-    public function __get($name)
-    {
-        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
-    }
-
-    public function __set($name, $value): void
-    {
-        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
-    }
-
     public static function packageNameToRegexp(string $allowPattern, string $wrap = '{^%s$}i'): string
     {
         $cleanedAllowPattern = str_replace('\\*', '.*', preg_quote($allowPattern));
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/PartialComposer.php b/crates/shirabe-php-rpc/php/stubs/Composer/PartialComposer.php
index a48133cb..6f90113a 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/PartialComposer.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/PartialComposer.php
@@ -52,6 +52,26 @@ class PartialComposer implements \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct()
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, []]);
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/Repository/ArrayRepository.php b/crates/shirabe-php-rpc/php/stubs/Composer/Repository/ArrayRepository.php
index a5358ff2..8210031a 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/Repository/ArrayRepository.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/Repository/ArrayRepository.php
@@ -48,6 +48,26 @@ class ArrayRepository implements RepositoryInterface, \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct(array $packages = [])
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, [$packages]]);
diff --git a/crates/shirabe-php-rpc/php/stubs/Composer/Repository/RepositoryManager.php b/crates/shirabe-php-rpc/php/stubs/Composer/Repository/RepositoryManager.php
index 9f3567d3..f2af01e5 100644
--- a/crates/shirabe-php-rpc/php/stubs/Composer/Repository/RepositoryManager.php
+++ b/crates/shirabe-php-rpc/php/stubs/Composer/Repository/RepositoryManager.php
@@ -53,6 +53,26 @@ class RepositoryManager implements \ShirabeRustStub
         \ShirabeRustObjectRegistry::adopt($this->__rhandle, $this);
     }
 
+    public function __get($name)
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__get', [$name]);
+    }
+
+    public function __set($name, $value): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__set', [$name, $value]);
+    }
+
+    public function __isset($name): bool
+    {
+        return \ShirabeRpcRuntime::callRust($this->__rhandle, '__isset', [$name]);
+    }
+
+    public function __unset($name): void
+    {
+        \ShirabeRpcRuntime::callRust($this->__rhandle, '__unset', [$name]);
+    }
+
     public function __construct(IOInterface $io, Config $config, HttpDownloader $httpDownloader, ?EventDispatcher $eventDispatcher = null, ?ProcessExecutor $process = null)
     {
         [$this->__rhandle, $this->__epoch] = \ShirabeRpcRuntime::callRust(0, '__shirabeConstruct', [static::class, [$io, $config, $httpDownloader, $eventDispatcher, $process]]);