diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 022e7ddc3..28d6c14d1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -352,14 +352,16 @@ jobs:
         submodules: true
 
     - name: Install clang compiler
-      if: matrix.compiler.install && (matrix.compiler.name == 'clang')
+      if: |
+        matrix.compiler.install && (matrix.compiler.name == 'clang')
       run: |
         wget https://apt.llvm.org/llvm.sh
         chmod u+x llvm.sh
         sudo ./llvm.sh ${{ matrix.compiler.version }}
 
     - name: Install gcc compiler
-      if: matrix.compiler.install && (matrix.compiler.name == 'gcc')
+      if: |
+        matrix.compiler.install && (matrix.compiler.name == 'gcc')
       run: |
         sudo apt-get install -y software-properties-common
         sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
@@ -376,7 +378,8 @@ jobs:
         pip install "conan<2"
 
     - name: Add custom settings for Conan packages
-      if: matrix.build-test-cfg.conan-custom-settings-defs
+      if: |
+        matrix.build-test-cfg.conan-custom-settings-defs
       run: |
         conan config init
         pip install PyYAML
@@ -475,7 +478,8 @@ jobs:
     # and lastly we can put the specific failures on the ignore-list for MSAN.  For now we do that; while
     # unpleasant it does get the job done.  TODO: Revisit/resolve tickets/improve (see above).
     - name: Prepare MSAN sanitizer compile-time config file(s)
-      if: (!cancelled()) && (matrix.build-test-cfg.sanitizer-name == 'msan')
+      if: |
+        (!cancelled()) && (matrix.build-test-cfg.sanitizer-name == 'msan')
       run: |
         cat <<'EOF' > $${ env.msan-ignore-list-cfg-file }}
         [memory]
@@ -554,7 +558,8 @@ jobs:
     # *any* suppression; otherwise we skip it for brevity.  `find . -name 'suppressions*.cfg` is pretty useful
     # to determine their presence in addition to whether the test itself has its specific suppressions of any kind.
     - name: Run link test [`ipc_core` - Flow-IPC Core]
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cd ${{ env.install-dir }}/bin
         mkdir -p logs/ipc_core_link_test
@@ -565,7 +570,8 @@ jobs:
         ./ipc_core_link_test.exec > logs/ipc_core_link_test/console.log 2>&1
 
     - name: Run link test [`ipc_transport_structured` - Flow-IPC Structured Transport]
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cd ${{ env.install-dir }}/bin
         mkdir -p logs/ipc_transport_structured_link_test
@@ -576,7 +582,8 @@ jobs:
         ./ipc_transport_structured_link_test.exec > logs/ipc_transport_structured_link_test/console.log 2>&1
 
     - name: Run link test [`ipc_session` - Flow-IPC Sessions]
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cd ${{ env.install-dir }}/bin
         mkdir -p logs/ipc_session_link_test
@@ -589,7 +596,8 @@ jobs:
         ./ipc_session_link_test_cli.exec > logs/ipc_session_link_test/cli.console.log 2>&1
 
     - name: Run link test [`ipc_shm` - Flow-IPC Shared Memory]
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cd ${{ env.install-dir }}/bin
         mkdir -p logs/ipc_shm_link_test
@@ -602,7 +610,8 @@ jobs:
         ./ipc_shm_link_test_cli.exec > logs/ipc_shm_link_test/cli.console.log 2>&1
 
     - name: Run link test [`ipc_shm_arena_lend` - Flow-IPC SHM-jemalloc]
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cd ${{ env.install-dir }}/bin
         mkdir -p logs/ipc_shm_arena_lend_link_test
@@ -621,7 +630,8 @@ jobs:
         ./ipc_shm_arena_lend_link_test_cli.exec > logs/ipc_shm_arena_lend_link_test/cli.console.log 2>&1
 
     - name: Run unit tests
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cd ${{ env.install-dir }}/bin
         # Some newline issues with the possible additional args; so need to make a wrapper script
@@ -654,7 +664,8 @@ jobs:
 
     # This follows the instructions in bin/transport_test/README.txt.
     - name: Prepare run script for [transport_test - Scripted mode] variations below
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cat <<'EOF' > ${{ env.install-dir }}/bin/run_transport_test_sc.sh
         echo "Log level: [$1]."
@@ -682,14 +693,16 @@ jobs:
 
     - name: Run integration test [transport_test - Scripted mode]
       id: transport_test_scripted
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_sc.sh \
           info
 
     - name: Re-run with increased logging, on failure only
-      if: (!cancelled()) && (steps.transport_test_scripted.outcome == 'failure')
+      if: |
+        (!cancelled()) && (steps.transport_test_scripted.outcome == 'failure')
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_sc.sh \
@@ -701,7 +714,8 @@ jobs:
     # the ipc::session safety model for estabshing IPC conversations (sessions).
 
     - name: Prepare IPC-session safety-friendly run-time environment for [transport_test - Exercise mode]
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         mkdir -p ~/bin/ex_srv_run ~/bin/ex_cli_run
         mkdir -p /tmp/var/run
@@ -710,7 +724,8 @@ jobs:
         cp -v ~/bin/ex_srv.exec ~/bin/ex_cli.exec
 
     - name: Prepare run script for [transport_test - Exercise mode] variations below
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         cat <<'EOF' > ${{ env.install-dir }}/bin/run_transport_test_ex.sh
         # Script created by pipeline during job.
@@ -749,14 +764,16 @@ jobs:
 
     - name: Run integration test [transport_test - Exercise mode - Heap sub-mode]
       id: transport_test_ex_heap
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_ex.sh \
           info heap
 
     - name: Re-run with increased logging, on failure only
-      if: (!cancelled()) && (steps.transport_test_ex_heap.outcome == 'failure')
+      if: |
+        (!cancelled()) && (steps.transport_test_ex_heap.outcome == 'failure')
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_ex.sh \
@@ -764,14 +781,16 @@ jobs:
 
     - name: Run integration test [transport_test - Exercise mode - SHM-classic sub-mode]
       id: transport_test_ex_shm_c
-      if: !cancelled()
+      if: |
+        !cancelled()
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_ex.sh \
           info shm_classic -shm-c
 
     - name: Re-run with increased logging, on failure only
-      if: (!cancelled()) && (steps.transport_test_ex_shm_c.outcome == 'failure')
+      if: |
+        (!cancelled()) && (steps.transport_test_ex_shm_c.outcome == 'failure')
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_ex.sh \
@@ -804,14 +823,16 @@ jobs:
     # reduce optimization to -O1, as well as with and without LTO; same result.
     - name: Run integration test [transport_test - Exercise mode - SHM-jemalloc sub-mode]
       id: transport_test_ex_shm_j
-      if: (!cancelled()) && ((matrix.compiler.id != 'clang-17') || (matrix.build-test-cfg.sanitizer-name != 'tsan'))
+      if: |
+        (!cancelled()) && ((matrix.compiler.id != 'clang-17') || (matrix.build-test-cfg.sanitizer-name != 'tsan'))
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_ex.sh \
           info shm_jemalloc -shm-j
 
     - name: Re-run with increased logging, on failure only
-      if: (!cancelled()) && (steps.transport_test_ex_shm_j.outcome == 'failure')
+      if: |
+        (!cancelled()) && (steps.transport_test_ex_shm_j.outcome == 'failure')
       run: |
         /usr/bin/bash -e \
           ${{ env.install-dir }}/bin/run_transport_test_ex.sh \
@@ -819,7 +840,8 @@ jobs:
 
     # See earlier comment block about why we saved all the logs including for console-output-only tests/demos.
     - name: Check test/demo logs for non-fatal sanitizer error(s)
-      if: (!cancelled()) && (matrix.build-test-cfg.sanitizer-name == 'ubsan')
+      if: |
+        (!cancelled()) && (matrix.build-test-cfg.sanitizer-name == 'ubsan')
       run: |
         cd ${{ env.install-dir }}/bin/logs
         # grep returns 0 if 1+ found, 1 if none found, 2+ on error.  So check results explicitly instead of -e.
@@ -838,14 +860,16 @@ jobs:
         echo 'No errors found in logs.'
 
     - name: Package test/demo logs tarball
-      if: always()
+      if: |
+        always()
       run: |
         cd ${{ env.install-dir }}/bin
         tar cvzf logs.tgz logs
         rm -rf logs # Save runner space.
 
     - name: Upload test/demo logs (please inspect if failure(s) seen above)
-      if: always()
+      if: |
+        always()
       uses: actions/upload-artifact@v3
       with:
         name: ipc-test-logs-${{ matrix.compiler.id }}-${{ matrix.build-test-cfg.id }}
diff --git a/flow b/flow
index dc3b4bddc..e4e23168a 160000
--- a/flow
+++ b/flow
@@ -1 +1 @@
-Subproject commit dc3b4bddc3700f2fb8c92543854f73670fe17958
+Subproject commit e4e23168a7ffc399a5edfb9c4f2d99f1309e403b