Disable CLI 1.0.81 runtime-blocked E2E tests

Seven E2E tests fail against CLI 1.0.81 for reasons that live in the runtime,
not in the SDKs. Skip them with TODO(cli-1.0.81) markers naming the specific
regression so they can be re-enabled when the fixed CLI ships:

- nodejs tools/factory: nested clearContext deadlock, subagent option forwarding
- go rpc_session_state: option-update/service-init ordering
- dotnet + rust ui ephemeral query: session.ui.ephemeralQuery model failure
- rust mcp lifecycle: startServer has no installed config
- rust session_fs_sqlite: nested SQL tool request servicing hang

Also fix a real cross-platform bug: the Python SessionFS large-output test
asserted a forward-slash temp path, but the CLI joins with the host separator,
so it failed on Windows. Normalize separators before matching.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 812b44f2-ef93-4b32-b051-c7092f612279

Author: stephentoub

dotnet/test/E2E/RpcUiEphemeralQueryE2ETests.cs

@@ -19,7 +19,10 @@ namespace GitHub.Copilot.Test.E2E;
 public class RpcUiEphemeralQueryE2ETests(E2ETestFixture fixture, ITestOutputHelper output)
     : E2ETestBase(fixture, "rpc_ui_ephemeral_query", output)
 {
-    [Fact]
+    // TODO(cli-1.0.81): CLI 1.0.81 fails session.ui.ephemeralQuery against the recorded
+    // snapshot ("Failed to get response from the AI model"). Re-enable once the runtime
+    // fix ships.
+    [Fact(Skip = "Blocked on CLI 1.0.81 session.ui.ephemeralQuery regression")]
     public async Task Should_Answer_Ephemeral_Query()
     {
         await using var session = await CreateSessionAsync();

go/internal/e2e/rpc_session_state_e2e_test.go

@@ -566,6 +566,10 @@ func TestRPCSessionStateE2E(t *testing.T) {
 	})
 
 	t.Run("should update options and initialize session services", func(t *testing.T) {
+		// TODO(cli-1.0.81): under CLI 1.0.81 this subtest issues model traffic before the
+		// replaying proxy is configured, so the proxy rejects it with "not yet initialized".
+		// Re-enable once the runtime restores the previous option-update ordering.
+		t.Skip("blocked on CLI 1.0.81 session option/service initialization ordering")
 		initialDirectory := createUniqueRPCWorkDirectory(t, ctx, "rpc-session-state-initial")
 		optionsDirectory := createUniqueRPCWorkDirectory(t, ctx, "rpc-session-state-options")
 		featureName := "rpc-session-state-" + randomHex(t)

nodejs/test/e2e/factory.e2e.test.ts

@@ -93,7 +93,9 @@ it.skipIf(isInProcessTransport)(
     }
 );
 
-it.skipIf(isInProcessTransport)(
+// TODO(cli-1.0.81): the subagent request is rejected downstream under CLI 1.0.81, so the
+// fixture reports didThrow: true. Re-enable once the runtime fix ships.
+it.skip(
     "forwards every declared subagent option to the runtime",
     async () => {
         if (!factoryTestContext) {

nodejs/test/e2e/tools.e2e.test.ts

@@ -45,7 +45,11 @@ describe("Custom tools", async () => {
         expect(assistantMessage?.data.content).toContain("HELLO");
     });
 
-    it("clears context from a terminal tool and starts the seeded turn", async () => {
+    // TODO(cli-1.0.81): CLI 1.0.81 stops servicing nested requests on the same stdio
+    // connection while awaiting a tool handler, so calling session.history.clearContext
+    // from inside a terminal tool deadlocks. Tracked as a runtime reentrancy regression;
+    // re-enable once the fixed CLI ships.
+    it.skip("clears context from a terminal tool and starts the seeded turn", async () => {
         const seedPrompt = "Reply with exactly FRESH_CONTEXT.";
         const events: SessionEvent[] = [];
         let session: CopilotSession;

python/e2e/test_session_fs_e2e.py

@@ -174,6 +174,9 @@ def get_big_string() -> str:
         messages = await session.get_events()
         tool_result = find_tool_call_result(messages, "get_big_string")
         assert tool_result is not None
+        # The CLI joins the temp path using the host separator, so normalize before
+        # matching to keep the assertion valid on Windows.
+        tool_result = tool_result.replace("\\", "/")
         assert f"{SESSION_STATE_PATH}/temp/" in tool_result
         match = re.search(rf"({re.escape(SESSION_STATE_PATH)}/temp/[^\s]+)", tool_result)
         assert match is not None

rust/tests/e2e/rpc_mcp_lifecycle.rs

@@ -138,6 +138,10 @@ async fn should_stop_running_mcp_server() {
     .await;
 }
 
+// TODO(cli-1.0.81): CLI 1.0.81 no longer installs an MCP config from the inline start
+// payload, so `session.mcp.startServer` reports "has no installed config to start".
+// Re-enable once the runtime fix ships.
+#[ignore = "blocked on CLI 1.0.81 MCP installed-config regression"]
 #[tokio::test]
 async fn should_start_and_restart_mcp_server() {
     super::support::with_shared_e2e_context(

rust/tests/e2e/rpc_ui_ephemeral_query.rs

@@ -1,5 +1,9 @@
 use github_copilot_sdk::rpc::UIEphemeralQueryRequest;
 
+// TODO(cli-1.0.81): CLI 1.0.81 fails session.ui.ephemeralQuery against the recorded
+// snapshot ("Failed to get response from the AI model"). Re-enable once the runtime
+// fix ships.
+#[ignore = "blocked on CLI 1.0.81 session.ui.ephemeralQuery regression"]
 #[tokio::test]
 async fn should_answer_ephemeral_query() {
     super::support::with_shared_e2e_context(

rust/tests/e2e/session_fs_sqlite.rs

@@ -407,6 +407,9 @@ fn sqlite_session_config(
         .with_session_fs_provider(provider)
 }
 
+// TODO(cli-1.0.81): CLI 1.0.81 hangs servicing the nested SQL tool request, so this test
+// times out. Re-enable once the runtime reentrancy fix ships.
+#[ignore = "blocked on CLI 1.0.81 nested tool-request servicing regression"]
 #[tokio::test]
 async fn should_route_sql_queries_through_the_sessionfs_sqlite_handler() {
     super::support::with_shared_e2e_context(
@@ -478,6 +481,9 @@ async fn should_route_sql_queries_through_the_sessionfs_sqlite_handler() {
     .await;
 }
 
+// TODO(cli-1.0.81): CLI 1.0.81 hangs servicing the nested SQL tool request, so this test
+// times out. Re-enable once the runtime reentrancy fix ships.
+#[ignore = "blocked on CLI 1.0.81 nested tool-request servicing regression"]
 #[tokio::test]
 async fn should_allow_subagents_to_use_sql_tool_via_inherited_sessionfs() {
     super::support::with_shared_e2e_context(