diff --git a/codex-rs/app-server-protocol/src/protocol/v2.rs b/codex-rs/app-server-protocol/src/protocol/v2.rs
index c7fcefae02..a1c60e241a 100644
--- a/codex-rs/app-server-protocol/src/protocol/v2.rs
+++ b/codex-rs/app-server-protocol/src/protocol/v2.rs
@@ -1,7 +1,6 @@
 use codex_protocol::ConversationId;
 use codex_protocol::account::PlanType;
 use codex_protocol::config_types::ReasoningEffort;
-use codex_protocol::protocol::RateLimitSnapshot;
 use mcp_types::ContentBlock as McpContentBlock;
 use schemars::JsonSchema;
 use serde::Deserialize;
@@ -435,7 +434,48 @@ pub struct TodoItem {
 #[serde(rename_all = "camelCase")]
 #[ts(export_to = "v2/")]
 pub struct AccountRateLimitsUpdatedNotification {
-    // TODO: create our own RateLimitSnapshot type that doesn't depend on codex_protocol
-    // so we can camelcase that bad boy.
     pub rate_limits: RateLimitSnapshot,
 }
+
+// CamelCased copy of codex_protocol::protocol::{RateLimitSnapshot, RateLimitWindow}
+// for the v2 surface. This avoids leaking snake_case into the v2 wire format.
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, JsonSchema, TS)]
+#[serde(rename_all = "camelCase")]
+#[ts(export_to = "v2/")]
+pub struct RateLimitSnapshot {
+    pub primary: Option<RateLimitWindow>,
+    pub secondary: Option<RateLimitWindow>,
+}
+
+impl From<codex_protocol::protocol::RateLimitSnapshot> for RateLimitSnapshot {
+    fn from(value: codex_protocol::protocol::RateLimitSnapshot) -> Self {
+        Self {
+            primary: value.primary.map(RateLimitWindow::from),
+            secondary: value.secondary.map(RateLimitWindow::from),
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, JsonSchema, TS)]
+#[serde(rename_all = "camelCase")]
+#[ts(export_to = "v2/")]
+pub struct RateLimitWindow {
+    /// Percentage (0-100) of the window that has been consumed.
+    pub used_percent: f64,
+    /// Rolling window duration, in minutes.
+    #[ts(type = "number | null")]
+    pub window_minutes: Option<i64>,
+    /// Unix timestamp (seconds since epoch) when the window resets.
+    #[ts(type = "number | null")]
+    pub resets_at: Option<i64>,
+}
+
+impl From<codex_protocol::protocol::RateLimitWindow> for RateLimitWindow {
+    fn from(value: codex_protocol::protocol::RateLimitWindow) -> Self {
+        Self {
+            used_percent: value.used_percent,
+            window_minutes: value.window_minutes,
+            resets_at: value.resets_at,
+        }
+    }
+}
diff --git a/codex-rs/app-server/src/codex_message_processor.rs b/codex-rs/app-server/src/codex_message_processor.rs
index 7940c5231d..2758399dcc 100644
--- a/codex-rs/app-server/src/codex_message_processor.rs
+++ b/codex-rs/app-server/src/codex_message_processor.rs
@@ -4,6 +4,7 @@ use crate::fuzzy_file_search::run_fuzzy_file_search;
 use crate::models::supported_models;
 use crate::outgoing_message::OutgoingMessageSender;
 use crate::outgoing_message::OutgoingNotification;
+use codex_app_server_protocol::AccountRateLimitsUpdatedNotification;
 use codex_app_server_protocol::AddConversationListenerParams;
 use codex_app_server_protocol::AddConversationSubscriptionResponse;
 use codex_app_server_protocol::ApplyPatchApprovalParams;
@@ -42,6 +43,7 @@ use codex_app_server_protocol::ModelListParams;
 use codex_app_server_protocol::ModelListResponse;
 use codex_app_server_protocol::NewConversationParams;
 use codex_app_server_protocol::NewConversationResponse;
+use codex_app_server_protocol::RateLimitSnapshot;
 use codex_app_server_protocol::RemoveConversationListenerParams;
 use codex_app_server_protocol::RemoveConversationSubscriptionResponse;
 use codex_app_server_protocol::RequestId;
@@ -646,7 +648,9 @@ impl CodexMessageProcessor {
     async fn get_account_rate_limits(&self, request_id: RequestId) {
         match self.fetch_account_rate_limits().await {
             Ok(rate_limits) => {
-                let response = GetAccountRateLimitsResponse { rate_limits };
+                let response = GetAccountRateLimitsResponse {
+                    rate_limits: rate_limits.into(),
+                };
                 self.outgoing.send_response(request_id, response).await;
             }
             Err(error) => {
@@ -1786,9 +1790,12 @@ async fn apply_bespoke_event_handling(
         }
         EventMsg::TokenCount(token_count_event) => {
             if let Some(rate_limits) = token_count_event.rate_limits {
+                let snapshot: RateLimitSnapshot = rate_limits.into();
                 outgoing
                     .send_server_notification(ServerNotification::AccountRateLimitsUpdated(
-                        rate_limits,
+                        AccountRateLimitsUpdatedNotification {
+                            rate_limits: snapshot,
+                        },
                     ))
                     .await;
             }
diff --git a/codex-rs/app-server/src/outgoing_message.rs b/codex-rs/app-server/src/outgoing_message.rs
index 3f4497fb23..d148c1ee38 100644
--- a/codex-rs/app-server/src/outgoing_message.rs
+++ b/codex-rs/app-server/src/outgoing_message.rs
@@ -142,8 +142,8 @@ pub(crate) struct OutgoingError {
 #[cfg(test)]
 mod tests {
     use codex_app_server_protocol::LoginChatGptCompleteNotification;
-    use codex_protocol::protocol::RateLimitSnapshot;
-    use codex_protocol::protocol::RateLimitWindow;
+    use codex_app_server_protocol::RateLimitSnapshot;
+    use codex_app_server_protocol::RateLimitWindow;
     use pretty_assertions::assert_eq;
     use serde_json::json;
     use uuid::Uuid;
@@ -177,26 +177,32 @@ mod tests {
 
     #[test]
     fn verify_account_rate_limits_notification_serialization() {
-        let notification = ServerNotification::AccountRateLimitsUpdated(RateLimitSnapshot {
-            primary: Some(RateLimitWindow {
-                used_percent: 25.0,
-                window_minutes: Some(15),
-                resets_at: Some(123),
-            }),
-            secondary: None,
-        });
+        let notification = ServerNotification::AccountRateLimitsUpdated(
+            codex_app_server_protocol::AccountRateLimitsUpdatedNotification {
+                rate_limits: RateLimitSnapshot {
+                    primary: Some(RateLimitWindow {
+                        used_percent: 25.0,
+                        window_minutes: Some(15),
+                        resets_at: Some(123),
+                    }),
+                    secondary: None,
+                },
+            },
+        );
 
         let jsonrpc_notification = OutgoingMessage::AppServerNotification(notification);
         assert_eq!(
             json!({
                 "method": "account/rateLimits/updated",
                 "params": {
-                    "primary": {
-                        "used_percent": 25.0,
-                        "window_minutes": 15,
-                        "resets_at": 123,
-                    },
-                    "secondary": null,
+                    "rateLimits": {
+                        "primary": {
+                            "usedPercent": 25.0,
+                            "windowMinutes": 15,
+                            "resetsAt": 123
+                        },
+                        "secondary": null
+                    }
                 },
             }),
             serde_json::to_value(jsonrpc_notification)
diff --git a/codex-rs/app-server/tests/suite/rate_limits.rs b/codex-rs/app-server/tests/suite/rate_limits.rs
index 16cbf153e9..5fc85eacff 100644
--- a/codex-rs/app-server/tests/suite/rate_limits.rs
+++ b/codex-rs/app-server/tests/suite/rate_limits.rs
@@ -7,10 +7,10 @@ use codex_app_server_protocol::GetAccountRateLimitsResponse;
 use codex_app_server_protocol::JSONRPCError;
 use codex_app_server_protocol::JSONRPCResponse;
 use codex_app_server_protocol::LoginApiKeyParams;
+use codex_app_server_protocol::RateLimitSnapshot;
+use codex_app_server_protocol::RateLimitWindow;
 use codex_app_server_protocol::RequestId;
 use codex_core::auth::AuthCredentialsStoreMode;
-use codex_protocol::protocol::RateLimitSnapshot;
-use codex_protocol::protocol::RateLimitWindow;
 use pretty_assertions::assert_eq;
 use serde_json::json;
 use std::path::Path;