diff --git a/.github/workflows/build-c-api-bindings.yml b/.github/workflows/build-c-api-bindings.yml
index a70c68ef1..ed2f04b6a 100644
--- a/.github/workflows/build-c-api-bindings.yml
+++ b/.github/workflows/build-c-api-bindings.yml
@@ -19,6 +19,33 @@ on:
     branches:
       - main
   pull_request:
+    # Skip PR runs whose changes cannot affect what this workflow builds or tests. Pushes
+    # to main still run everything. An unlisted path runs the workflow, so a new
+    # directory is covered until it is deliberately added here.
+    paths-ignore:
+    - '**/*.md'
+    - LICENSE
+    - THIRD-PARTY-PROGRAMS
+    - .github/CODEOWNERS
+    - .github/dependabot.yml
+    - .github/workflows/pre-commit.yml
+    - .github/workflows/skywalking-eyes.yml
+    - bindings/python/**
+    - examples/cpp/**
+    - examples/python/**
+    - tests/**
+    - benchmark/**
+    - utils/**
+    - .github/scripts/setup_apt_repo_linux.sh
+    - bindings/cpp/**
+    - .github/scripts/build-cpp-runtime-bindings.sh
+    - .github/scripts/test-cpp-runtime-*.sh
+    - .github/scripts/test-faiss.sh
+    - .github/workflows/build-linux.yml
+    - .github/workflows/build-linux-arm.yml
+    - .github/workflows/build-macos.yaml
+    - .github/workflows/build-cpp-runtime-bindings.yml
+    - .github/workflows/cibuildwheel.yml
   workflow_dispatch:
 
 permissions:
diff --git a/.github/workflows/build-cpp-runtime-bindings.yml b/.github/workflows/build-cpp-runtime-bindings.yml
index b87cd0ab5..e23a3e84d 100644
--- a/.github/workflows/build-cpp-runtime-bindings.yml
+++ b/.github/workflows/build-cpp-runtime-bindings.yml
@@ -19,6 +19,33 @@ on:
     branches:
       - main
   pull_request:
+    # Skip PR runs whose changes cannot affect what this workflow builds or tests. Pushes
+    # to main still run everything. An unlisted path runs the workflow, so a new
+    # directory is covered until it is deliberately added here.
+    paths-ignore:
+    - '**/*.md'
+    - LICENSE
+    - THIRD-PARTY-PROGRAMS
+    - .github/CODEOWNERS
+    - .github/dependabot.yml
+    - .github/workflows/pre-commit.yml
+    - .github/workflows/skywalking-eyes.yml
+    - bindings/python/**
+    - examples/cpp/**
+    - examples/python/**
+    - tests/**
+    - benchmark/**
+    - utils/**
+    - .github/scripts/setup_apt_repo_linux.sh
+    - bindings/c/**
+    - examples/c/**
+    - .github/scripts/build-c-api-bindings.sh
+    - .github/scripts/test-c-api-*.sh
+    - .github/workflows/build-linux.yml
+    - .github/workflows/build-linux-arm.yml
+    - .github/workflows/build-macos.yaml
+    - .github/workflows/build-c-api-bindings.yml
+    - .github/workflows/cibuildwheel.yml
   workflow_dispatch:
 
 permissions:
diff --git a/.github/workflows/build-linux-arm.yml b/.github/workflows/build-linux-arm.yml
index 57489af66..0e70d4ba9 100644
--- a/.github/workflows/build-linux-arm.yml
+++ b/.github/workflows/build-linux-arm.yml
@@ -19,6 +19,29 @@ on:
     branches:
     - main
   pull_request:
+    # Skip PR runs whose changes cannot affect what this workflow builds or tests. Pushes
+    # to main still run everything. An unlisted path runs the workflow, so a new
+    # directory is covered until it is deliberately added here.
+    paths-ignore:
+    - '**/*.md'
+    - LICENSE
+    - THIRD-PARTY-PROGRAMS
+    - .github/CODEOWNERS
+    - .github/dependabot.yml
+    - .github/workflows/pre-commit.yml
+    - .github/workflows/skywalking-eyes.yml
+    - bindings/**
+    - examples/c/**
+    - examples/python/**
+    - docker/**
+    - .github/scripts/build-c-api-bindings.sh
+    - .github/scripts/test-c-api-*.sh
+    - .github/scripts/build-cpp-runtime-bindings.sh
+    - .github/scripts/test-cpp-runtime-*.sh
+    - .github/scripts/test-faiss.sh
+    - .github/workflows/build-c-api-bindings.yml
+    - .github/workflows/build-cpp-runtime-bindings.yml
+    - .github/workflows/cibuildwheel.yml
   workflow_dispatch:
 
 permissions:
@@ -59,8 +82,7 @@ jobs:
               -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
               -DSVS_BUILD_BINARIES=YES \
               -DSVS_BUILD_TESTS=YES \
-              -DSVS_BUILD_EXAMPLES=YES \
-              -DSVS_EXPERIMENTAL_LEANVEC=YES
+              -DSVS_BUILD_EXAMPLES=YES
 
     - name: Build Tests and Utilities
       working-directory: ${{ runner.temp }}/build
diff --git a/.github/workflows/build-linux.yml b/.github/workflows/build-linux.yml
index 328590cae..7ae300034 100644
--- a/.github/workflows/build-linux.yml
+++ b/.github/workflows/build-linux.yml
@@ -19,6 +19,29 @@ on:
     branches:
     - main
   pull_request:
+    # Skip PR runs whose changes cannot affect what this workflow builds or tests. Pushes
+    # to main still run everything. An unlisted path runs the workflow, so a new
+    # directory is covered until it is deliberately added here.
+    paths-ignore:
+    - '**/*.md'
+    - LICENSE
+    - THIRD-PARTY-PROGRAMS
+    - .github/CODEOWNERS
+    - .github/dependabot.yml
+    - .github/workflows/pre-commit.yml
+    - .github/workflows/skywalking-eyes.yml
+    - bindings/**
+    - examples/c/**
+    - examples/python/**
+    - docker/**
+    - .github/scripts/build-c-api-bindings.sh
+    - .github/scripts/test-c-api-*.sh
+    - .github/scripts/build-cpp-runtime-bindings.sh
+    - .github/scripts/test-cpp-runtime-*.sh
+    - .github/scripts/test-faiss.sh
+    - .github/workflows/build-c-api-bindings.yml
+    - .github/workflows/build-cpp-runtime-bindings.yml
+    - .github/workflows/cibuildwheel.yml
   workflow_dispatch:
 
 permissions:
diff --git a/.github/workflows/build-macos.yaml b/.github/workflows/build-macos.yaml
index 51e125d6d..015273c36 100644
--- a/.github/workflows/build-macos.yaml
+++ b/.github/workflows/build-macos.yaml
@@ -19,6 +19,29 @@ on:
     branches:
     - main
   pull_request:
+    # Skip PR runs whose changes cannot affect what this workflow builds or tests. Pushes
+    # to main still run everything. An unlisted path runs the workflow, so a new
+    # directory is covered until it is deliberately added here.
+    paths-ignore:
+    - '**/*.md'
+    - LICENSE
+    - THIRD-PARTY-PROGRAMS
+    - .github/CODEOWNERS
+    - .github/dependabot.yml
+    - .github/workflows/pre-commit.yml
+    - .github/workflows/skywalking-eyes.yml
+    - bindings/**
+    - examples/c/**
+    - examples/python/**
+    - docker/**
+    - .github/scripts/build-c-api-bindings.sh
+    - .github/scripts/test-c-api-*.sh
+    - .github/scripts/build-cpp-runtime-bindings.sh
+    - .github/scripts/test-cpp-runtime-*.sh
+    - .github/scripts/test-faiss.sh
+    - .github/workflows/build-c-api-bindings.yml
+    - .github/workflows/build-cpp-runtime-bindings.yml
+    - .github/workflows/cibuildwheel.yml
   workflow_dispatch:
 
 permissions:
@@ -72,8 +95,7 @@ jobs:
               -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
               -DSVS_BUILD_BINARIES=YES \
               -DSVS_BUILD_TESTS=YES \
-              -DSVS_BUILD_EXAMPLES=YES \
-              -DSVS_EXPERIMENTAL_LEANVEC=YES
+              -DSVS_BUILD_EXAMPLES=YES
 
     - name: Build Tests and Utilities
       working-directory: ${{ runner.temp }}/build
diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index 6ab5644f9..bf8c3af71 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -19,6 +19,35 @@ on:
     branches:
     - main
   pull_request:
+    # Skip PR runs whose changes cannot affect what this workflow builds or tests. Pushes
+    # to main still run everything. An unlisted path runs the workflow, so a new
+    # directory is covered until it is deliberately added here.
+    paths-ignore:
+    - '**/*.md'
+    - LICENSE
+    - THIRD-PARTY-PROGRAMS
+    - .github/CODEOWNERS
+    - .github/dependabot.yml
+    - .github/workflows/pre-commit.yml
+    - .github/workflows/skywalking-eyes.yml
+    - bindings/c/**
+    - bindings/cpp/**
+    - examples/c/**
+    - examples/cpp/**
+    - tests/**
+    - benchmark/**
+    - utils/**
+    - .github/scripts/setup_apt_repo_linux.sh
+    - .github/scripts/build-c-api-bindings.sh
+    - .github/scripts/test-c-api-*.sh
+    - .github/scripts/build-cpp-runtime-bindings.sh
+    - .github/scripts/test-cpp-runtime-*.sh
+    - .github/scripts/test-faiss.sh
+    - .github/workflows/build-linux.yml
+    - .github/workflows/build-linux-arm.yml
+    - .github/workflows/build-macos.yaml
+    - .github/workflows/build-c-api-bindings.yml
+    - .github/workflows/build-cpp-runtime-bindings.yml
   workflow_dispatch:
 
 permissions: