Keep Claude NODE_OPTIONS restore shim out of TMPDIR

.github/test-determinism-allowlist.txt

@@ -2,6 +2,8 @@
 # Format: relpath<TAB>rule<TAB>short reason
 # A finding whose (path, rule) appears here is suppressed.
 # Remove a line once the underlying test is determinized.
+Packages/Shared/CMUXMobileCore/Tests/CMUXMobileCoreTests/CmxRetryAfterPolicyTests.swift	sleep-then-assert	pre-existing on origin/main in #12179; injected policy sleep, remove when determinism checker recognizes it
+Packages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/MobileTerminalLaneCoordinatorTests.swift	sleep-then-assert	pre-existing on origin/main in #12007; remove when determinized
 Packages/iOS/CmuxMobileRPC/Tests/CmuxMobileRPCTests/MobileCoreRPCTransportDrainTests.swift	sleep-then-assert	temporary outage debt owned by #8931; remove when determinized
 Packages/iOS/CmuxMobileShellUI/Tests/CmuxMobileShellUITests/OnboardingMacDiscoveryKeepAliveTests.swift	sleep-then-assert	temporary outage debt owned by #9163; remove when determinized
 cmuxTests/WorkspaceForkConversationContextMenuTests.swift	assert-on-duration	grandfathered

.github/workflows/ci.yml

@@ -637,6 +637,14 @@ jobs:
           set -euo pipefail
           ./scripts/select-ci-xcode.sh
 
+      - name: Setup Node
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: "20"
+
+      - name: Export Node path for Xcode test runner
+        run: echo "TEST_RUNNER_CMUX_NODE_BINARY=$(command -v node)" >> "$GITHUB_ENV"
+
       - name: Capture Ghostty revision
         id: ghostty-revision
         run: |
@@ -1389,6 +1397,7 @@ jobs:
           CMUX_CLI_BIN="$CLI_BIN" python3 tests/test_cli_socket_autodiscovery.py
           python3 tests/test_codex_wrapper_resume_hooks.py
           python3 tests/test_claude_wrapper_hooks.py
+          python3 tests/test_claude_wrapper_node_options_survives_tmpdir_purge.py
           python3 tests/test_codex_wrapper_computer_use_mcp.py
           python3 tests/test_cmux_cua_mcp_smoke.py
           python3 tests/test_cmux_cua_build_cache_safety.py

.github/workflows/test-depot.yml

@@ -78,6 +78,14 @@ jobs:
           set -euo pipefail
           ./scripts/select-ci-xcode.sh
 
+      - name: Setup Node
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: "20"
+
+      - name: Export Node path for Xcode test runner
+        run: echo "TEST_RUNNER_CMUX_NODE_BINARY=$(command -v node)" >> "$GITHUB_ENV"
+
       - name: Setup Bun
         uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2