diff --git a/packages/runtime-playground/src/editor-command-runners.ts b/packages/runtime-playground/src/editor-command-runners.ts
index 438d529c..bbf29267 100644
--- a/packages/runtime-playground/src/editor-command-runners.ts
+++ b/packages/runtime-playground/src/editor-command-runners.ts
@@ -966,11 +966,30 @@ async function captureExpectedEditorPresentationIdentities(
 ): Promise<{ identities: string[]; complete: boolean } | undefined> {
   if (target.kind !== "post" || !target.postId) return undefined
   const response = await runPlaygroundCommand("wordpress.editor-open.capture-presentation-contract", server, {
-    code: bootstrapPhpCode(runtimeSpec, `
-$post = get_post(${target.postId});
+    code: bootstrapPhpCode(runtimeSpec, editorPresentationContractPhpCode(target.postId), []),
+  })
+  assertPlaygroundResponseOk("wordpress.editor-open.capture-presentation-contract", response)
+  const value = parseEditorPresentationContract(response.text) as { identities?: unknown; complete?: unknown }
+  if (!Array.isArray(value.identities) || value.complete !== true || !value.identities.every((identity) => typeof identity === "string" && /^[a-f0-9]{64}$/.test(identity))) {
+    throw new Error("wordpress.editor-open presentation contract returned an invalid identity set")
+  }
+  return { identities: [...new Set(value.identities)].sort(), complete: true }
+}
+
+export function editorPresentationContractPhpCode(postId: number): string {
+  return `
+$post = get_post(${postId});
 if ( ! $post instanceof WP_Post ) { throw new RuntimeException( 'Editor target post is unavailable.' ); }
-wp_styles();
+$GLOBALS['post'] = $post;
+if ( ! function_exists( 'set_current_screen' ) ) { require_once ABSPATH . 'wp-admin/includes/screen.php'; }
+set_current_screen( 'post' );
+$wp_styles = wp_styles();
 wp_scripts();
+$queued_before_editor_assets = $wp_styles->queue;
+do_action( 'enqueue_block_assets' );
+$editor_style_handles = array_values( array_diff( $wp_styles->queue, $queued_before_editor_assets ) );
+$wp_styles->all_deps( $editor_style_handles );
+$editor_style_handles = array_values( array_unique( array_merge( $editor_style_handles, $wp_styles->to_do ) ) );
 $settings = get_block_editor_settings( array(), new WP_Block_Editor_Context( array( 'post' => $post ) ) );
 $identities = array();
 foreach ( (array) ( $settings['styles'] ?? array() ) as $style ) {
@@ -979,17 +998,15 @@ foreach ( (array) ( $settings['styles'] ?? array() ) as $style ) {
     foreach ( $matches[1] as $identity ) { $identities[] = strtolower( $identity ); }
   }
 }
+foreach ( $editor_style_handles as $handle ) {
+  $style = $wp_styles->registered[$handle] ?? null;
+  $version = is_object( $style ) ? ( $style->ver ?? null ) : null;
+  if ( is_string( $version ) && preg_match( '/^[a-f0-9]{64}$/iD', $version ) ) { $identities[] = strtolower( $version ); }
+}
 $identities = array_values( array_unique( $identities ) );
 sort( $identities, SORT_STRING );
 echo PHP_EOL . '${EDITOR_PRESENTATION_CONTRACT_MARKER}' . base64_encode( (string) wp_json_encode( array( 'identities' => $identities, 'complete' => true ) ) ) . PHP_EOL;
-`, []),
-  })
-  assertPlaygroundResponseOk("wordpress.editor-open.capture-presentation-contract", response)
-  const value = parseEditorPresentationContract(response.text) as { identities?: unknown; complete?: unknown }
-  if (!Array.isArray(value.identities) || value.complete !== true || !value.identities.every((identity) => typeof identity === "string" && /^[a-f0-9]{64}$/.test(identity))) {
-    throw new Error("wordpress.editor-open presentation contract returned an invalid identity set")
-  }
-  return { identities: [...new Set(value.identities)].sort(), complete: true }
+`
 }
 
 export function parseEditorPresentationContract(output: string): unknown {
diff --git a/tests/editor-presentation-contract.test.ts b/tests/editor-presentation-contract.test.ts
new file mode 100644
index 00000000..54bc0aa1
--- /dev/null
+++ b/tests/editor-presentation-contract.test.ts
@@ -0,0 +1,71 @@
+import assert from "node:assert/strict"
+import { editorPresentationContractPhpCode, parseEditorPresentationContract } from "../packages/runtime-playground/src/editor-command-runners.js"
+import { runCommandText } from "../scripts/test-kit.js"
+
+const inlineIdentity = "A".repeat(64)
+const externalIdentity = "b".repeat(64)
+const unrelatedIdentity = "c".repeat(64)
+
+async function captureContract(inlineCss: string[], editorVersions: unknown[], prequeuedVersions: unknown[] = []): Promise<{ identities: string[]; complete: boolean }> {
+  const php = `
+define( 'ABSPATH', '/tmp/' );
+class WP_Post {}
+class WP_Block_Editor_Context { public function __construct( public array $context ) {} }
+$fixture_inline_css = ${JSON.stringify(inlineCss)};
+$fixture_editor_versions = ${JSON.stringify(editorVersions)};
+$fixture_prequeued_versions = ${JSON.stringify(prequeuedVersions)};
+$fixture_styles = new class {
+  public array $queue = array();
+  public array $registered = array();
+  public array $to_do = array();
+  public function all_deps( $handles ) { $this->to_do = $handles; }
+};
+foreach ( $fixture_prequeued_versions as $index => $version ) {
+  $handle = 'unrelated-' . $index;
+  $fixture_styles->queue[] = $handle;
+  $fixture_styles->registered[$handle] = (object) array( 'ver' => $version );
+}
+function get_post( $post_id ) { return new WP_Post(); }
+function set_current_screen( $screen ) {}
+function wp_styles() { return $GLOBALS['fixture_styles']; }
+function wp_scripts() {}
+function do_action( $hook ) {
+  if ( 'enqueue_block_assets' !== $hook ) return;
+  foreach ( $GLOBALS['fixture_editor_versions'] as $index => $version ) {
+    $handle = 'editor-' . $index;
+    $GLOBALS['fixture_styles']->queue[] = $handle;
+    $GLOBALS['fixture_styles']->registered[$handle] = (object) array( 'ver' => $version );
+  }
+}
+function get_block_editor_settings( $settings, $context ) {
+  return array( 'styles' => array_map( static fn ( $css ) => array( 'css' => $css ), $GLOBALS['fixture_inline_css'] ) );
+}
+function wp_json_encode( $value ) { return json_encode( $value ); }
+${editorPresentationContractPhpCode(17)}
+`
+  const output = await runCommandText("php", ["-r", php])
+  return parseEditorPresentationContract(output) as { identities: string[]; complete: boolean }
+}
+
+assert.deepEqual(await captureContract([`:root{--blocks-engine-presentation:${inlineIdentity};}`], []), {
+  identities: [inlineIdentity.toLowerCase()],
+  complete: true,
+}, "inline-only delivery remains in the expected contract")
+
+assert.deepEqual(await captureContract([], [externalIdentity.toUpperCase()]), {
+  identities: [externalIdentity],
+  complete: true,
+}, "external-only editor delivery contributes its canonical version identity")
+
+assert.deepEqual(await captureContract([
+  `/* --blocks-engine-presentation:${inlineIdentity} */`,
+  `/* --blocks-engine-presentation:${externalIdentity} */`,
+], [externalIdentity.toUpperCase()]), {
+  identities: [inlineIdentity.toLowerCase(), externalIdentity].sort(),
+  complete: true,
+}, "mixed delivery is normalized, deduplicated, and sorted")
+
+assert.deepEqual(await captureContract([], ["6.7.1", "not-a-hash", ` ${externalIdentity}`, `${externalIdentity}0`, null], [unrelatedIdentity]), {
+  identities: [],
+  complete: true,
+}, "non-hash versions and unrelated prequeued stylesheets are ignored")