diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 7e23a4f..eb5abf7 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.6.3"
+  ".": "0.6.4"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4fb731..def4fe1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [0.6.4](https://github.com/mathematic-inc/earl/compare/v0.6.3...v0.6.4) (2026-08-31)
+
+
+### Bug Fixes
+
+* **auth:** Remove OAuth fallback diagnostic ([#99](https://github.com/mathematic-inc/earl/issues/99)) ([0065dd3](https://github.com/mathematic-inc/earl/commit/0065dd338b8ed5ffd078e16ed442d2d066f62ea5))
+* **auth:** Stop logging OAuth error details ([#97](https://github.com/mathematic-inc/earl/issues/97)) ([e617a1e](https://github.com/mathematic-inc/earl/commit/e617a1e6b0ea359ec28a09be9ccc11dd93768061))
+
 ## [0.6.3](https://github.com/mathematic-inc/earl/compare/v0.6.2...v0.6.3) (2026-08-27)
 
 
diff --git a/Cargo.lock b/Cargo.lock
index e37cc74..c0b7a56 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1905,7 +1905,7 @@ checksum = "92773504d58c093f6de2459af4af33faa518c13451eb8f2b5698ed3d36e7c813"
 
 [[package]]
 name = "earl"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "anyhow",
  "assert_cmd",
@@ -1965,7 +1965,7 @@ dependencies = [
 
 [[package]]
 name = "earl-core"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "anyhow",
  "base64 0.23.1",
@@ -1979,7 +1979,7 @@ dependencies = [
 
 [[package]]
 name = "earl-protocol-bash"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "anyhow",
  "earl-core",
@@ -1992,7 +1992,7 @@ dependencies = [
 
 [[package]]
 name = "earl-protocol-browser"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "anyhow",
  "base64 0.23.1",
@@ -2015,7 +2015,7 @@ dependencies = [
 
 [[package]]
 name = "earl-protocol-grpc"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "anyhow",
  "earl-core",
@@ -2038,7 +2038,7 @@ dependencies = [
 
 [[package]]
 name = "earl-protocol-http"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "anyhow",
  "base64 0.23.1",
@@ -2053,7 +2053,7 @@ dependencies = [
 
 [[package]]
 name = "earl-protocol-sql"
-version = "0.6.3"
+version = "0.6.4"
 dependencies = [
  "anyhow",
  "earl-core",
diff --git a/Cargo.toml b/Cargo.toml
index b6ed7c7..42c61aa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "earl"
-version = "0.6.3"
+version = "0.6.4"
 edition.workspace = true
 rust-version.workspace = true
 description = "AI-safe CLI for AI agents"
@@ -44,12 +44,12 @@ clap = { version = "4.6", features = ["derive"] }
 clap_complete = "4.6"
 comfy-table = "8.0"
 directories = "6.0"
-earl-core = { path = "crates/earl-core", version = "0.6.3" }
-earl-protocol-bash = { path = "crates/earl-protocol-bash", version = "0.6.3", optional = true }
-earl-protocol-browser = { path = "crates/earl-protocol-browser", version = "0.6.3", optional = true }
-earl-protocol-grpc = { path = "crates/earl-protocol-grpc", version = "0.6.3", optional = true }
-earl-protocol-http = { path = "crates/earl-protocol-http", version = "0.6.3", optional = true }
-earl-protocol-sql = { path = "crates/earl-protocol-sql", version = "0.6.3", optional = true }
+earl-core = { path = "crates/earl-core", version = "0.6.4" }
+earl-protocol-bash = { path = "crates/earl-protocol-bash", version = "0.6.4", optional = true }
+earl-protocol-browser = { path = "crates/earl-protocol-browser", version = "0.6.4", optional = true }
+earl-protocol-grpc = { path = "crates/earl-protocol-grpc", version = "0.6.4", optional = true }
+earl-protocol-http = { path = "crates/earl-protocol-http", version = "0.6.4", optional = true }
+earl-protocol-sql = { path = "crates/earl-protocol-sql", version = "0.6.4", optional = true }
 fastembed = { version = "6.0", optional = true }
 hcl = { package = "hcl-rs", version = "0.19.8" }
 hickory-resolver = "0.26"
diff --git a/crates/earl-core/Cargo.toml b/crates/earl-core/Cargo.toml
index fa2fb15..5a68661 100644
--- a/crates/earl-core/Cargo.toml
+++ b/crates/earl-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "earl-core"
-version = "0.6.3"
+version = "0.6.4"
 edition.workspace = true
 rust-version.workspace = true
 description = "Shared types and traits for earl protocol crates"
diff --git a/crates/earl-protocol-bash/Cargo.toml b/crates/earl-protocol-bash/Cargo.toml
index 603b13b..24abb3b 100644
--- a/crates/earl-protocol-bash/Cargo.toml
+++ b/crates/earl-protocol-bash/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "earl-protocol-bash"
-version = "0.6.3"
+version = "0.6.4"
 edition.workspace = true
 rust-version.workspace = true
 description = "Bash sandboxed execution protocol for earl"
@@ -13,7 +13,7 @@ categories = ["command-line-utilities"]
 
 [dependencies]
 anyhow = "1.0"
-earl-core = { path = "../earl-core", version = "0.6.3" }
+earl-core = { path = "../earl-core", version = "0.6.4" }
 libc = "0.2"
 rkyv = { version = "0.8", features = ["bytecheck", "std"] }
 serde = { version = "1.0", features = ["derive"] }
diff --git a/crates/earl-protocol-browser/Cargo.toml b/crates/earl-protocol-browser/Cargo.toml
index 3ae3057..a4dbdbb 100644
--- a/crates/earl-protocol-browser/Cargo.toml
+++ b/crates/earl-protocol-browser/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "earl-protocol-browser"
-version = "0.6.3"
+version = "0.6.4"
 edition.workspace = true
 rust-version.workspace = true
 description = "Browser automation protocol for earl (chromiumoxide)"
@@ -17,7 +17,7 @@ base64 = "0.23"
 chromiumoxide = { version = "0.9", default-features = false, features = ["bytes"] }
 chrono = { version = "0.4", features = ["serde"] }
 directories = "6.0"
-earl-core = { path = "../earl-core", version = "0.6.3" }
+earl-core = { path = "../earl-core", version = "0.6.4" }
 fs4 = { version = "1.1", features = ["tokio"] }
 futures = "0.3"
 rkyv = { version = "0.8", features = ["bytecheck", "std"] }
diff --git a/crates/earl-protocol-grpc/Cargo.toml b/crates/earl-protocol-grpc/Cargo.toml
index 2d89469..f06affe 100644
--- a/crates/earl-protocol-grpc/Cargo.toml
+++ b/crates/earl-protocol-grpc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "earl-protocol-grpc"
-version = "0.6.3"
+version = "0.6.4"
 edition.workspace = true
 rust-version.workspace = true
 description = "gRPC execution protocol for earl"
@@ -13,7 +13,7 @@ categories = ["network-programming"]
 
 [dependencies]
 anyhow = "1.0"
-earl-core = { path = "../earl-core", version = "0.6.3" }
+earl-core = { path = "../earl-core", version = "0.6.4" }
 futures-util = "0.3"
 http = "1"
 http-body = "1"
diff --git a/crates/earl-protocol-http/Cargo.toml b/crates/earl-protocol-http/Cargo.toml
index 79a35dc..747e02a 100644
--- a/crates/earl-protocol-http/Cargo.toml
+++ b/crates/earl-protocol-http/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "earl-protocol-http"
-version = "0.6.3"
+version = "0.6.4"
 edition.workspace = true
 rust-version.workspace = true
 description = "HTTP and GraphQL execution protocol for earl"
@@ -14,7 +14,7 @@ categories = ["network-programming", "web-programming"]
 [dependencies]
 anyhow = "1.0"
 base64 = "0.23"
-earl-core = { path = "../earl-core", version = "0.6.3" }
+earl-core = { path = "../earl-core", version = "0.6.4" }
 reqwest = { version = "0.13.4", features = ["brotli", "deflate", "form", "gzip", "json", "multipart", "query", "rustls", "zstd"] }
 rkyv = { version = "0.8", features = ["bytecheck", "std"] }
 serde = { version = "1.0", features = ["derive"] }
diff --git a/crates/earl-protocol-sql/Cargo.toml b/crates/earl-protocol-sql/Cargo.toml
index f094d87..d97718b 100644
--- a/crates/earl-protocol-sql/Cargo.toml
+++ b/crates/earl-protocol-sql/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "earl-protocol-sql"
-version = "0.6.3"
+version = "0.6.4"
 edition.workspace = true
 rust-version.workspace = true
 description = "SQL execution protocol for earl (sqlx)"
@@ -13,7 +13,7 @@ categories = ["database"]
 
 [dependencies]
 anyhow = "1.0"
-earl-core = { path = "../earl-core", version = "0.6.3" }
+earl-core = { path = "../earl-core", version = "0.6.4" }
 rkyv = { version = "0.8", features = ["bytecheck", "std"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"