diff --git a/src/storage/adapters/azureBlobStorage.ts b/src/storage/adapters/azureBlobStorage.ts
index 5aae6ae2..9b5c80dc 100644
--- a/src/storage/adapters/azureBlobStorage.ts
+++ b/src/storage/adapters/azureBlobStorage.ts
@@ -531,6 +531,13 @@ export class AzureBlobStorage extends BaseStorage {
     // Use write buffer in high-volume mode
     if (this.highVolumeMode && this.nounWriteBuffer) {
       this.logger.trace(`📝 BUFFERING: Adding noun ${node.id} to write buffer (high-volume mode active)`)
+
+      // v6.2.6: CRITICAL FIX - Populate cache BEFORE buffering for read-after-write consistency
+      // Without this, add() returns but relate() can't find the entity (cloud storage production bug)
+      if (node.vector && Array.isArray(node.vector) && node.vector.length > 0) {
+        this.nounCacheManager.set(node.id, node)
+      }
+
       await this.nounWriteBuffer.add(node.id, node)
       return
     } else if (!this.highVolumeMode) {
@@ -1033,6 +1040,10 @@ export class AzureBlobStorage extends BaseStorage {
     // Use write buffer in high-volume mode
     if (this.highVolumeMode && this.verbWriteBuffer) {
       this.logger.trace(`📝 BUFFERING: Adding verb ${edge.id} to write buffer`)
+
+      // v6.2.6: CRITICAL FIX - Populate cache BEFORE buffering for read-after-write consistency
+      this.verbCacheManager.set(edge.id, edge)
+
       await this.verbWriteBuffer.add(edge.id, edge)
       return
     }
diff --git a/src/storage/adapters/gcsStorage.ts b/src/storage/adapters/gcsStorage.ts
index 877733e4..d699e008 100644
--- a/src/storage/adapters/gcsStorage.ts
+++ b/src/storage/adapters/gcsStorage.ts
@@ -442,6 +442,14 @@ export class GcsStorage extends BaseStorage {
     // Use write buffer in high-volume mode
     if (this.highVolumeMode && this.nounWriteBuffer) {
       this.logger.trace(`📝 BUFFERING: Adding noun ${node.id} to write buffer (high-volume mode active)`)
+
+      // v6.2.6: CRITICAL FIX - Populate cache BEFORE buffering for read-after-write consistency
+      // Without this, add() returns but relate() can't find the entity (GCS production bug)
+      // The buffer flushes asynchronously, but cache ensures immediate reads succeed
+      if (node.vector && Array.isArray(node.vector) && node.vector.length > 0) {
+        this.nounCacheManager.set(node.id, node)
+      }
+
       await this.nounWriteBuffer.add(node.id, node)
       return
     } else if (!this.highVolumeMode) {
@@ -833,6 +841,11 @@ export class GcsStorage extends BaseStorage {
     // Use write buffer in high-volume mode
     if (this.highVolumeMode && this.verbWriteBuffer) {
       this.logger.trace(`📝 BUFFERING: Adding verb ${edge.id} to write buffer`)
+
+      // v6.2.6: CRITICAL FIX - Populate cache BEFORE buffering for read-after-write consistency
+      // Without this, relate() might not find the verb immediately after creation
+      this.verbCacheManager.set(edge.id, edge)
+
       await this.verbWriteBuffer.add(edge.id, edge)
       return
     }
diff --git a/src/storage/adapters/r2Storage.ts b/src/storage/adapters/r2Storage.ts
index 7ee051c5..7a025773 100644
--- a/src/storage/adapters/r2Storage.ts
+++ b/src/storage/adapters/r2Storage.ts
@@ -486,6 +486,13 @@ export class R2Storage extends BaseStorage {
     // Use write buffer in high-volume mode
     if (this.highVolumeMode && this.nounWriteBuffer) {
       this.logger.trace(`📝 BUFFERING: Adding noun ${node.id} to write buffer`)
+
+      // v6.2.6: CRITICAL FIX - Populate cache BEFORE buffering for read-after-write consistency
+      // Without this, add() returns but relate() can't find the entity (cloud storage production bug)
+      if (node.vector && Array.isArray(node.vector) && node.vector.length > 0) {
+        this.nounCacheManager.set(node.id, node)
+      }
+
       await this.nounWriteBuffer.add(node.id, node)
       return
     }
@@ -759,6 +766,9 @@ export class R2Storage extends BaseStorage {
     this.checkVolumeMode()
 
     if (this.highVolumeMode && this.verbWriteBuffer) {
+      // v6.2.6: CRITICAL FIX - Populate cache BEFORE buffering for read-after-write consistency
+      this.verbCacheManager.set(edge.id, edge)
+
       await this.verbWriteBuffer.add(edge.id, edge)
       return
     }
diff --git a/src/storage/adapters/s3CompatibleStorage.ts b/src/storage/adapters/s3CompatibleStorage.ts
index 37f1b1da..19e0011d 100644
--- a/src/storage/adapters/s3CompatibleStorage.ts
+++ b/src/storage/adapters/s3CompatibleStorage.ts
@@ -1069,6 +1069,14 @@ export class S3CompatibleStorage extends BaseStorage {
     // Use write buffer in high-volume mode
     if (this.highVolumeMode && this.nounWriteBuffer) {
       this.logger.trace(`📝 BUFFERING: Adding noun ${node.id} to write buffer (high-volume mode active)`)
+
+      // v6.2.6: CRITICAL FIX - Populate cache BEFORE buffering for read-after-write consistency
+      // Without this, add() returns but relate() can't find the entity (cloud storage production bug)
+      // The buffer flushes asynchronously, but cache ensures immediate reads succeed
+      if (node.vector && Array.isArray(node.vector) && node.vector.length > 0) {
+        this.nounCacheManager.set(node.id, node)
+      }
+
       await this.nounWriteBuffer.add(node.id, node)
       return
     } else if (!this.highVolumeMode) {