{
  "verdict": "APPROVE",
  "summary": "This PR adds a well-designed `submit_message` default method that transparently handles content uploads for non-inline messages. The implementation correctly handles all three item types (Inline, Storage, IPFS), includes proper hash verification with a new `HashMismatch` error variant, and uses a raw reqwest client for multipart uploads (which are non-cloneable and incompatible with retry middleware). The tests are comprehensive: unit tests with a mock client cover all code paths including the hash mismatch error case, and integration tests verify both inline and storage-routed messages work end-to-end. The CLI update to use `submit_message` is appropriate. The code is clean, well-documented, and follows existing patterns.",
  "comments": [
    {
      "path": "crates/aleph-sdk/src/client.rs",
      "line": 764,
      "body": "Minor nit: The `upload_to_storage` call passes `message.item_content.as_bytes()` but the storage upload function takes `&[u8]`. This is fine, but you might consider being explicit about the type conversion with `.as_bytes()` since `item_content` is a `String`. (This is already done, just noting it's correct.)"
    },
    {
      "path": "crates/aleph-sdk/src/client.rs",
      "line": 1428,
      "body": "The error conversion `StorageError::UploadFailed(reqwest_middleware::Error::from(e))` is clever - it wraps the raw reqwest error in the middleware error type to maintain type consistency. This is a good pattern."
    },
    {
      "path": "crates/heph/tests/integration.rs",
      "line":
</parameter>
</function>
</tool_call>