make batch operations work

README.md

@@ -119,23 +119,6 @@ Binary encoding → Disk
 JSON response → Client
 ```
 
-### Module Structure
-
-```
-jormundb/
-├── rocksdb/            - C FFI bindings to librocksdb
-├── rocksdb_shim/       - C++ FFI bindings to librocksdb (so we can use the WAL helper functions)
-├── dynamodb/           - Core types and operations
-│   ├── types.odin      - AttributeValue, Item, Key, etc.
-│   ├── json.odin       - DynamoDB JSON serialization
-│   ├── storage.odin    - Storage engine with RocksDB
-│   ├── key_codec.odin  - Binary key encoding
-│   ├── item_codec.odin - Binary TLV item encoding
-│   └── handler.odin    - HTTP request handlers
-├── http.odin           - HTTP Server
-└── main.odin           - HTTP Router and handler (entry point)
-```
-
 ### Storage Format
 
 **Keys** (varint-length-prefixed segments):
@@ -230,17 +213,17 @@ Scan (full table)     |       5000 ops |   234.56 ms |    21320 ops/sec
 - ✅ DeleteItem
 - ✅ Query (with KeyConditionExpression)
 - ✅ Scan (with pagination)
+- ✅ ConditionExpression
+- ✅ FilterExpression
+- ✅ ProjectionExpression
+- ✅ BatchWriteItem
+- ✅ BatchGetItem
 
 ### Coming Soon
 
-- ⏳ UpdateItem (with UpdateExpression)
-- ⏳ BatchWriteItem
-- ⏳ BatchGetItem
+- ⏳ UpdateItem (works but needs UPDATED_NEW/UPDATED_OLD response filtering to work for full Dynamo Parity)
 - ⏳ Global Secondary Indexes
 - ⏳ Local Secondary Indexes
-- ⏳ ConditionExpression
-- ⏳ FilterExpression
-- ⏳ ProjectionExpression
 
 ## Configuration