diff --git a/Cargo.lock b/Cargo.lock
index b47703d..f3b3ff4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6856,9 +6856,9 @@ dependencies = [
 
 [[package]]
 name = "rx4"
-version = "0.5.0"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2caf829fd2dfb658bc4395aaf057494d604d97f4f37e518042eb8ed64a26a26"
+checksum = "be35dbc87bca2acc8176f6bf938dfe0721acde1581ae96029584be371e7c1129"
 dependencies = [
  "async-trait",
  "cancellation-token",
diff --git a/Cargo.toml b/Cargo.toml
index 9782abb..25cff95 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -104,7 +104,7 @@ computer-use-praefectus = ["dep:praefectus", "dep:ed25519-dalek"]
 # Deliberately off: `builtin-tools` (apollo registers its own tools; also
 # pulls in the fff/git2/notify stack), `mcp` (apollo has src/mcp_server.rs),
 # `zkr-memory` (gates rx4's self_improve; apollo depends on zkr directly).
-rx4 = { version = "0.5.0", default-features = false, features = ["ipc", "providers", "skills", "graph-memory"] }
+rx4 = { version = "0.6.3", default-features = false, features = ["ipc", "providers", "skills", "graph-memory"] }
 
 # Async runtime (optimized features only)
 tokio = { version = "1", features = ["rt-multi-thread", "macros", "net", "io-util", "sync", "time", "fs", "signal", "process", "io-std"] }
diff --git a/src/agent/rotary_bridge.rs b/src/agent/rotary_bridge.rs
index 39f4687..0d93c0a 100644
--- a/src/agent/rotary_bridge.rs
+++ b/src/agent/rotary_bridge.rs
@@ -420,6 +420,7 @@ pub fn register_apollo_tools(
                     id: String::new(),
                     content: result.output,
                     is_error: result.is_error,
+                    error_kind: None,
                 }
             })
         });