diff --git a/.github/workflows/build-debian.yml b/.github/workflows/build-debian.yml
index 645bd9c26b..636aeaf946 100644
--- a/.github/workflows/build-debian.yml
+++ b/.github/workflows/build-debian.yml
@@ -6,8 +6,9 @@ on:
     inputs:
       build_dir:
         description: 'The directory where the build will take place.'
-        required: true
+        required: false
         type: string
+        default: '.build'
       conan_remote_name:
         description: 'The name of the Conan remote to use.'
         required: true
diff --git a/.github/workflows/build-rhel.yml b/.github/workflows/build-rhel.yml
index 5f0b4811e0..4600186a49 100644
--- a/.github/workflows/build-rhel.yml
+++ b/.github/workflows/build-rhel.yml
@@ -5,6 +5,11 @@ name: RHEL
 on:
   workflow_call:
     inputs:
+      build_dir:
+        description: 'The directory where the build will take place.'
+        required: false
+        type: string
+        default: '.build'
       conan_remote_name:
         description: 'The name of the Conan remote to use.'
         required: true
diff --git a/.github/workflows/check-clang-format.yml b/.github/workflows/check-clang-format.yml
index 4d9c0fdd1d..ffe50598ae 100644
--- a/.github/workflows/check-clang-format.yml
+++ b/.github/workflows/check-clang-format.yml
@@ -3,13 +3,7 @@
 name: Clang Format
 
 # This workflow can only be triggered by other workflows.
-on:
-  workflow_call:
-    inputs:
-      runner:
-        description: 'An optional string representing the GitHub runner to use.'
-        required: true
-        type: string
+on: workflow_call
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -21,7 +15,7 @@ defaults:
 
 jobs:
   clang-format:
-    runs-on: ${{ inputs.runner }}
+    runs-on: ubuntu-latest
     container: ghcr.io/xrplf/ci/tools-rippled-clang-format
     steps:
       # The $GITHUB_WORKSPACE and ${{ github.workspace }} might not point to the
diff --git a/.github/workflows/check-levelization.yml b/.github/workflows/check-levelization.yml
index 7d4f6bc18e..cd6d704acd 100644
--- a/.github/workflows/check-levelization.yml
+++ b/.github/workflows/check-levelization.yml
@@ -3,13 +3,7 @@
 name: Levelization
 
 # This workflow can only be triggered by other workflows.
-on:
-  workflow_call:
-    inputs:
-      runner:
-        description: 'An optional string representing the GitHub runner to use.'
-        required: true
-        type: string
+on: workflow_call
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -21,7 +15,7 @@ defaults:
 
 jobs:
   levelization:
-    runs-on: ${{ inputs.runner }}
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
diff --git a/.github/workflows/generate-matrix.yml b/.github/workflows/generate-matrix.yml
index 8807e8c65e..ddc60e8986 100644
--- a/.github/workflows/generate-matrix.yml
+++ b/.github/workflows/generate-matrix.yml
@@ -27,6 +27,31 @@ on:
         type: string
 
 # Generate the JSON outputs by using JQ to compact the JSON string.
+# * This workflow can be called as follows:
+# ```yaml
+#   generate-matrix:
+#     uses: ./.github/workflows/generate-matrix.yml
+#     with:
+#       architecture: ${{ env.STRATEGY_MATRIX_ARCHITECTURE }}
+#       os: ${{ env.STRATEGY_MATRIX_OS }}
+#       build_type: ${{ env.STRATEGY_MATRIX_BUILD_TYPE }}
+#       cmake_args: ${{ env.STRATEGY_MATRIX_UNITY }}
+# ```
+# * This workflow can be used as follows:
+# ```yaml
+#   use-matrix:
+#     needs: generate-matrix
+#     strategy:
+#       fail-fast: false
+#       matrix:
+#         architecture: ${{ fromJson(needs.generate-matrix.outputs.architecture) }}
+#         os: ${{ fromJson(needs.generate-matrix.outputs.os) }}
+#         build_type: ${{ fromJson(needs.generate-matrix.outputs.build_type) }}
+#         cmake_args: ${{ fromJson(needs.generate-matrix.outputs.cmake_args) }}
+#     runs-on: ${{ matrix.architecture.runner }}
+#     container: ghcr.io/xrplf/ci/${{ matrix.os.distro }}-${{ matrix.os.release }}:${{ matrix.os.compiler_name }}-${{ matrix.os.compiler_version }}
+#     ...
+# ```
 jobs:
   generate-matrix:
     runs-on: ${{ inputs.runner }}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 09c52d4789..643ebea5ce 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,26 +20,18 @@ defaults:
     shell: bash
 
 env:
-  # The default build directory for the project.
-  BUILD_DIR: .build
   # The Conan remote where the dependencies will be cached.
   CONAN_REMOTE_NAME: xrplf
   CONAN_REMOTE_URL: https://conan.ripplex.io
-  # The default runner for the jobs. This can be overridden in individual jobs.
-  RUNNER: ubuntu-latest
 
 jobs:
   check-clang-format:
     if: github.event.pull_request.draft == false || contains(github.event.pull_request.labels.*.name, 'DraftRunCI')
     uses: ./.github/workflows/check-clang-format.yml
-    with:
-      runner: ${{ env.RUNNER }}
 
   check-levelization:
     if: github.event.pull_request.draft == false || contains(github.event.pull_request.labels.*.name, 'DraftRunCI')
     uses: ./.github/workflows/check-levelization.yml
-    with:
-      runner: ${{ env.RUNNER }}
 
   debian:
     needs:
@@ -47,7 +39,6 @@ jobs:
       - check-levelization
     uses: ./.github/workflows/build-debian.yml
     with:
-      build_dir: ${{ env.BUILD_DIR }}
       conan_remote_name: ${{ env.CONAN_REMOTE_NAME }}
       conan_remote_url: ${{ env.CONAN_REMOTE_URL }}
     secrets:
@@ -60,7 +51,6 @@ jobs:
 #      - check-levelization
 #    uses: ./.github/workflows/build-rhel.yml
 #    with:
-#      build_dir: ${{ env.BUILD_DIR }}
 #      conan_remote_name: ${{ env.CONAN_REMOTE_NAME }}
 #      conan_remote_url: ${{ env.CONAN_REMOTE_URL }}
 #    secrets:
@@ -73,7 +63,6 @@ jobs:
 #      - check-levelization
 #    uses: ./.github/workflows/build-ubuntu.yml
 #    with:
-#      build_dir: ${{ env.BUILD_DIR }}
 #      conan_remote_name: ${{ env.CONAN_REMOTE_NAME }}
 #      conan_remote_url: ${{ env.CONAN_REMOTE_URL }}
 #    secrets:
@@ -86,7 +75,6 @@ jobs:
 #      - check-levelization
 #    uses: ./.github/workflows/build-macos.yml
 #    with:
-#      build_dir: ${{ env.BUILD_DIR }}
 #      conan_remote_name: ${{ env.CONAN_REMOTE_NAME }}
 #      conan_remote_url: ${{ env.CONAN_REMOTE_URL }}
 #    secrets:
@@ -99,7 +87,6 @@ jobs:
 #      - check-levelization
 #    uses: ./.github/workflows/build-windows.yml
 #    with:
-#      build_dir: ${{ env.BUILD_DIR }}
 #      conan_remote_name: ${{ env.CONAN_REMOTE_NAME }}
 #      conan_remote_url: ${{ env.CONAN_REMOTE_URL }}
 #    secrets: