diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 8cdd5cc..a3b5b79 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.0.0-rc.3"
+  ".": "1.0.0-rc.4"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8457811..ff0ab6f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [1.0.0-rc.4](https://github.com/tableau/hyper-api-rust/compare/v1.0.0-rc.3...v1.0.0-rc.4) (2026-09-08)
+
+
+### Features
+
+* **mcp:** connect the daemon to its engine over IPC ([#304](https://github.com/tableau/hyper-api-rust/issues/304)) ([bcd88fd](https://github.com/tableau/hyper-api-rust/commit/bcd88fd299ce2ccb49d4a1bbbaf8497b4a1b3dd4))
+
+
+### Miscellaneous Chores
+
+* release 1.0.0-rc.4 ([d59fa0e](https://github.com/tableau/hyper-api-rust/commit/d59fa0e758000cea76ea68253ca62a9ad40bcd58))
+
 ## [1.0.0-rc.3](https://github.com/tableau/hyper-api-rust/compare/v1.0.0-rc.2...v1.0.0-rc.3) (2026-09-07)
 
 
diff --git a/Cargo.lock b/Cargo.lock
index 03a79ea..91ff168 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1778,7 +1778,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "arrow",
  "async-stream",
@@ -1803,7 +1803,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-core"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "arrow",
  "base64 0.23.1",
@@ -1844,7 +1844,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-derive"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "hyperdb-api",
  "hyperdb-compile-check",
@@ -1856,7 +1856,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-node"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "hyperdb-api",
  "napi",
@@ -1868,7 +1868,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-salesforce"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "arrow",
  "base64 0.23.1",
@@ -1890,7 +1890,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-bootstrap"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "anyhow",
  "clap",
@@ -1907,7 +1907,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-compile-check"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "hyperdb-api",
  "parking_lot",
@@ -1916,7 +1916,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-mcp"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "arrow",
  "base64 0.23.1",
@@ -3591,7 +3591,7 @@ dependencies = [
 
 [[package]]
 name = "sea-query-hyperdb"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "sea-query",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index b446842..50712b8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ exclude = ["hyperdb-compile-check"]
 # `cargo build --manifest-path hyperdb-compile-check/Cargo.toml`.
 
 [workspace.package]
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 edition = "2024"
 rust-version = "1.88"
 license = "MIT OR Apache-2.0"
diff --git a/hyperdb-api-core/Cargo.toml b/hyperdb-api-core/Cargo.toml
index 6f50e40..4fe16c8 100644
--- a/hyperdb-api-core/Cargo.toml
+++ b/hyperdb-api-core/Cargo.toml
@@ -66,7 +66,7 @@ serde_json = { workspace = true }
 
 # Salesforce OAuth authentication (optional, via standalone crate)
 # x-release-please-start-version
-hyperdb-api-salesforce = { path = "../hyperdb-api-salesforce", version = "=1.0.0-rc.3", optional = true }
+hyperdb-api-salesforce = { path = "../hyperdb-api-salesforce", version = "=1.0.0-rc.4", optional = true }
 # x-release-please-end
 
 # Arrow parsing for catalog operations (optional, used by authenticated_client)
diff --git a/hyperdb-api-derive/Cargo.toml b/hyperdb-api-derive/Cargo.toml
index 626e2f3..197e113 100644
--- a/hyperdb-api-derive/Cargo.toml
+++ b/hyperdb-api-derive/Cargo.toml
@@ -27,7 +27,7 @@ syn = { version = "3", features = ["full"] }
 quote = "1"
 proc-macro2 = "1"
 # x-release-please-start-version
-hyperdb-compile-check = { path = "../hyperdb-compile-check", version = "=1.0.0-rc.3", optional = true }
+hyperdb-compile-check = { path = "../hyperdb-compile-check", version = "=1.0.0-rc.4", optional = true }
 # x-release-please-end
 
 [dev-dependencies]
diff --git a/hyperdb-api/Cargo.toml b/hyperdb-api/Cargo.toml
index 89ee78b..4ace1df 100644
--- a/hyperdb-api/Cargo.toml
+++ b/hyperdb-api/Cargo.toml
@@ -14,7 +14,7 @@ autobenches = false
 
 [dependencies]
 # x-release-please-start-version
-hyperdb-api-core = { path = "../hyperdb-api-core", version = "=1.0.0-rc.3" }
+hyperdb-api-core = { path = "../hyperdb-api-core", version = "=1.0.0-rc.4" }
 # x-release-please-end
 # NOTE: hyperdb-api-derive is intentionally NOT a dep of hyperdb-api.
 # Adding it creates a cycle:
diff --git a/hyperdb-compile-check/Cargo.lock b/hyperdb-compile-check/Cargo.lock
index 5138300..2a84fe4 100644
--- a/hyperdb-compile-check/Cargo.lock
+++ b/hyperdb-compile-check/Cargo.lock
@@ -863,7 +863,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "arrow",
  "async-stream",
@@ -881,7 +881,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-api-core"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "base64 0.23.1",
  "byteorder",
@@ -916,7 +916,7 @@ dependencies = [
 
 [[package]]
 name = "hyperdb-compile-check"
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 dependencies = [
  "hyperdb-api",
  "parking_lot",
diff --git a/hyperdb-compile-check/Cargo.toml b/hyperdb-compile-check/Cargo.toml
index 72511cf..53232c2 100644
--- a/hyperdb-compile-check/Cargo.toml
+++ b/hyperdb-compile-check/Cargo.toml
@@ -7,7 +7,7 @@
 [package]
 name = "hyperdb-compile-check"
 # x-release-please-start-version
-version = "1.0.0-rc.3"
+version = "1.0.0-rc.4"
 # x-release-please-end
 edition = "2024"
 rust-version = "1.88"
@@ -25,7 +25,7 @@ categories = ["database", "development-tools"]
 
 [dependencies]
 # x-release-please-start-version
-hyperdb-api = { path = "../hyperdb-api", version = "=1.0.0-rc.3" }
+hyperdb-api = { path = "../hyperdb-api", version = "=1.0.0-rc.4" }
 # x-release-please-end
 parking_lot = "0.12"
 tempfile = "3.20"
diff --git a/hyperdb-mcp/Cargo.toml b/hyperdb-mcp/Cargo.toml
index dc9f64f..52fabcf 100644
--- a/hyperdb-mcp/Cargo.toml
+++ b/hyperdb-mcp/Cargo.toml
@@ -21,7 +21,7 @@ path = "src/main.rs"
 
 [dependencies]
 # x-release-please-start-version
-hyperdb-api = { path = "../hyperdb-api", version = "=1.0.0-rc.3" }
+hyperdb-api = { path = "../hyperdb-api", version = "=1.0.0-rc.4" }
 # x-release-please-end
 rmcp = { version = "1.7", features = ["server", "transport-io"] }
 tokio = { version = "1", features = ["rt-multi-thread", "macros", "io-std", "signal", "time"] }
diff --git a/version.txt b/version.txt
index 3c029dd..d17f065 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.0-rc.3
+1.0.0-rc.4