diff --git a/go/internal/e2e/mcp_oauth_e2e_test.go b/go/internal/e2e/mcp_oauth_e2e_test.go
index 27e6092e11..356805371b 100644
--- a/go/internal/e2e/mcp_oauth_e2e_test.go
+++ b/go/internal/e2e/mcp_oauth_e2e_test.go
@@ -261,6 +261,7 @@ func TestMCPOAuthE2E(t *testing.T) {
 	})
 
 	t.Run("resolve pending MCP OAuth request through RPC", func(t *testing.T) {
+		testharness.SkipIfInProcess(t, "blocked on github/copilot-agent-runtime#18961 MCP OAuth connection stall")
 		ctx := testharness.NewTestContext(t)
 		ctx.ConfigureWithoutSnapshot(t)
 		client := ctx.NewClient()
diff --git a/nodejs/package.json b/nodejs/package.json
index 7bb3159f73..783c4d5390 100644
--- a/nodejs/package.json
+++ b/nodejs/package.json
@@ -5,7 +5,7 @@
         "url": "https://github.com/github/copilot-sdk.git"
     },
     "version": "0.0.0-dev",
-    "copilotCliVersion": "1.0.83-5",
+    "copilotCliVersion": "1.0.83",
     "description": "TypeScript SDK for programmatic control of GitHub Copilot CLI via JSON-RPC",
     "main": "./dist/cjs/index.js",
     "types": "./dist/index.d.ts",
diff --git a/nodejs/src/cliVersion.ts b/nodejs/src/cliVersion.ts
index 60a4ba864d..b15767e821 100644
--- a/nodejs/src/cliVersion.ts
+++ b/nodejs/src/cliVersion.ts
@@ -1,3 +1,3 @@
-export const COPILOT_CLI_VERSION = "1.0.83-5";
+export const COPILOT_CLI_VERSION = "1.0.83";
 
 export const COPILOT_CLI_USE_NPM_PACKAGE = false;
diff --git a/rust/tests/e2e/mcp_oauth.rs b/rust/tests/e2e/mcp_oauth.rs
index e99e70500c..0930721b88 100644
--- a/rust/tests/e2e/mcp_oauth.rs
+++ b/rust/tests/e2e/mcp_oauth.rs
@@ -256,6 +256,11 @@ async fn should_cancel_pending_mcp_oauth_request() {
 
 #[tokio::test]
 async fn should_resolve_pending_mcp_oauth_request_through_rpc() {
+    if super::support::skip_inprocess(
+        "blocked on github/copilot-agent-runtime#18961 MCP OAuth connection stall",
+    ) {
+        return;
+    }
     with_e2e_context_no_snapshot(|ctx| {
         Box::pin(async move {
             ctx.set_default_copilot_user();
diff --git a/rust/tests/e2e/rpc_shell_edge_cases.rs b/rust/tests/e2e/rpc_shell_edge_cases.rs
index cdd692e1ab..3d1717723a 100644
--- a/rust/tests/e2e/rpc_shell_edge_cases.rs
+++ b/rust/tests/e2e/rpc_shell_edge_cases.rs
@@ -389,7 +389,7 @@ fn nonexistent_command() -> String {
 #[cfg(windows)]
 fn stderr_command(marker_path: &Path) -> String {
     format!(
-        "powershell -NoLogo -NoProfile -Command \"[Console]::Error.WriteLine('boom'); Set-Content -LiteralPath '{}' -Value done; exit 2\"",
+        "powershell -NoLogo -NoProfile -Command \"[Console]::Error.WriteLine('boom'); exit 2\" & echo done > \"{}\" & exit /b 2",
         marker_path.display()
     )
 }