diff --git a/.github/workflows/ci-expanded.yml b/.github/workflows/ci-expanded.yml
index 77460359..6a8611bb 100644
--- a/.github/workflows/ci-expanded.yml
+++ b/.github/workflows/ci-expanded.yml
@@ -7,15 +7,36 @@
 
 name: Expanded Continuous Integration
 
-on: [ workflow_dispatch ]
+on:
+  workflow_dispatch:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.repository_owner == 'libbitcoin' && (github.event.pull_request.number || github.run_id) || github.ref }}
   cancel-in-progress: true
 
 jobs:
+  information:
+    runs-on: ubuntu-latest
+
+    env:
+      CONCURRENCY_GROUP: ${{ github.workflow }}-${{ github.repository_owner == 'libbitcoin' && (github.event.pull_request.number || github.run_id) || github.ref }}
+
+    steps:
+        - name: state
+          run: |
+            echo "group    : $CONCURRENCY_GROUP"
+            echo "owner    : ${{ github.repository_owner }}"
+            echo "pr       : ${{ github.event.pull_request }}"
+            echo "pr #     : ${{ github.event.pull_request.number }}"
+            echo "run_id   : ${{ github.run_id }}"
+            echo "ref      : ${{ github.ref }}"
+            echo "base_ref : ${{ github.base_ref }}"
+            echo "head_ref : ${{ github.head_ref }}"
+
 
   gnu:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -404,6 +425,8 @@ jobs:
           fi
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -411,7 +434,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-system
+
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -419,7 +452,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-database
+
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -427,7 +470,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-network
+
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -435,13 +488,23 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-node
+
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
           path: 'libbitcoin-server'
           repository: ${{ github.repository }}
 
+
       - name: Prepare toolchain [linux]
         if: ${{ startsWith(matrix.image, 'ubuntu') }}
         shell: bash
@@ -574,6 +637,8 @@ jobs:
           if-no-files-found: warn
 
   cmake:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -962,6 +1027,8 @@ jobs:
           fi
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -969,7 +1036,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-system
+
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -977,7 +1054,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-database
+
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -985,7 +1072,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-network
+
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -993,13 +1090,23 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-node
+
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
           path: 'libbitcoin-server'
           repository: ${{ github.repository }}
 
+
       - name: Prepare toolchain [linux]
         if: ${{ startsWith(matrix.image, 'ubuntu') }}
         shell: bash
@@ -1132,6 +1239,8 @@ jobs:
           if-no-files-found: warn
 
   presets:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -1146,7 +1255,7 @@ jobs:
             package: "clang-19 clang++-19"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -1157,7 +1266,7 @@ jobs:
             package: "clang-19 clang++-19"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-shared"
@@ -1168,7 +1277,7 @@ jobs:
             package: "clang-19 clang++-19"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-static"
@@ -1179,7 +1288,7 @@ jobs:
             package: "clang-19 clang++-19"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-shared"
@@ -1189,7 +1298,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -1199,7 +1308,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-shared"
@@ -1209,7 +1318,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-static"
@@ -1219,7 +1328,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-shared"
@@ -1229,7 +1338,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -1239,7 +1348,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-shared"
@@ -1249,7 +1358,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-static"
@@ -1259,7 +1368,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-shared"
@@ -1269,7 +1378,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -1279,7 +1388,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-shared"
@@ -1289,7 +1398,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-static"
@@ -1299,7 +1408,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-shared"
@@ -1309,7 +1418,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -1319,7 +1428,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-shared"
@@ -1329,7 +1438,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-static"
@@ -1339,7 +1448,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-shared"
@@ -1350,7 +1459,7 @@ jobs:
             package: "g++-15 gcc-15"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -1361,7 +1470,7 @@ jobs:
             package: "g++-15 gcc-15"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-shared"
@@ -1372,7 +1481,7 @@ jobs:
             package: "g++-15 gcc-15"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-static"
@@ -1383,7 +1492,7 @@ jobs:
             package: "g++-15 gcc-15"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-shared"
@@ -1394,7 +1503,7 @@ jobs:
             package: "g++-16 gcc-16"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -1405,7 +1514,7 @@ jobs:
             package: "g++-16 gcc-16"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-shared"
@@ -1416,7 +1525,7 @@ jobs:
             package: "g++-16 gcc-16"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-release-static"
@@ -1427,7 +1536,7 @@ jobs:
             package: "g++-16 gcc-16"
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
     runs-on: ${{ matrix.image }}
 
@@ -1448,6 +1557,8 @@ jobs:
           fi
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1455,7 +1566,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-system
+
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1463,7 +1584,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-database
+
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1471,7 +1602,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-network
+
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1479,13 +1620,23 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-node
+
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
           path: 'libbitcoin-server'
           repository: ${{ github.repository }}
 
+
       - name: Prepare toolchain [linux]
         if: ${{ startsWith(matrix.image, 'ubuntu') }}
         shell: bash
@@ -1613,6 +1764,8 @@ jobs:
           if-no-files-found: warn
 
   msvc:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -1661,6 +1814,8 @@ jobs:
           msbuild-architecture: x64
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1668,7 +1823,16 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-system -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1676,7 +1840,16 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-database -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1684,7 +1857,16 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-network -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -1692,7 +1874,15 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-node -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a248cac8..10413e00 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,15 +7,39 @@
 
 name: Continuous Integration
 
-on: [ pull_request, push, workflow_dispatch ]
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, closed]
+  push:
+  workflow_dispatch:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.repository_owner == 'libbitcoin' && (github.event.pull_request.number || github.run_id) || github.ref }}
   cancel-in-progress: true
 
 jobs:
+  information:
+    runs-on: ubuntu-latest
+
+    env:
+      CONCURRENCY_GROUP: ${{ github.workflow }}-${{ github.repository_owner == 'libbitcoin' && (github.event.pull_request.number || github.run_id) || github.ref }}
+
+    steps:
+        - name: state
+          run: |
+            echo "group    : $CONCURRENCY_GROUP"
+            echo "owner    : ${{ github.repository_owner }}"
+            echo "pr       : ${{ github.event.pull_request }}"
+            echo "pr #     : ${{ github.event.pull_request.number }}"
+            echo "run_id   : ${{ github.run_id }}"
+            echo "ref      : ${{ github.ref }}"
+            echo "base_ref : ${{ github.base_ref }}"
+            echo "head_ref : ${{ github.head_ref }}"
+
 
   gnu:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -97,6 +121,8 @@ jobs:
           fi
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -104,7 +130,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-system
+
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -112,7 +148,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-database
+
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -120,7 +166,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-network
+
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -128,13 +184,23 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-node
+
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
           path: 'libbitcoin-server'
           repository: ${{ github.repository }}
 
+
       - name: Prepare toolchain [linux]
         if: ${{ startsWith(matrix.image, 'ubuntu') }}
         shell: bash
@@ -267,6 +333,8 @@ jobs:
           if-no-files-found: warn
 
   cmake:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -348,6 +416,8 @@ jobs:
           fi
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -355,7 +425,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-system
+
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -363,7 +443,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-database
+
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -371,7 +461,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-network
+
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -379,13 +479,23 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-node
+
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
           path: 'libbitcoin-server'
           repository: ${{ github.repository }}
 
+
       - name: Prepare toolchain [linux]
         if: ${{ startsWith(matrix.image, 'ubuntu') }}
         shell: bash
@@ -518,6 +628,8 @@ jobs:
           if-no-files-found: warn
 
   presets:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -531,7 +643,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
           - image: ubuntu-24.04
             preset: "nix-gnu-debug-static"
@@ -541,7 +653,7 @@ jobs:
             coverage: ""
             boost: "--build-boost"
             secp256k1: "--build-secp256k1"
-            options: ""
+            options: "--build-skip-tests"
 
     runs-on: ${{ matrix.image }}
 
@@ -562,6 +674,8 @@ jobs:
           fi
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -569,7 +683,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-system
+
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -577,7 +701,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-database
+
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -585,7 +719,17 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-network
+
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -593,13 +737,23 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: bash
+        run: |
+          rm -rf ${{ github.workspace }}/libbitcoin-node
+
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
           path: 'libbitcoin-server'
           repository: ${{ github.repository }}
 
+
       - name: Prepare toolchain [linux]
         if: ${{ startsWith(matrix.image, 'ubuntu') }}
         shell: bash
@@ -727,6 +881,8 @@ jobs:
           if-no-files-found: warn
 
   msvc:
+    if: github.event_name != 'pull_request' || github.event.action != 'closed'
+
     strategy:
       fail-fast: false
 
@@ -763,6 +919,8 @@ jobs:
           msbuild-architecture: x64
 
       - name: Checkout repository [libbitcoin-system]
+        id: checkout-libbitcoin-system
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -770,7 +928,16 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-system
 
+      - name: Checkout repository [libbitcoin-system] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-system.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-system -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-database]
+        id: checkout-libbitcoin-database
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -778,7 +945,16 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-database
 
+      - name: Checkout repository [libbitcoin-database] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-database.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-database -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-network]
+        id: checkout-libbitcoin-network
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -786,7 +962,16 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-network
 
+      - name: Checkout repository [libbitcoin-network] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-network.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-network -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-node]
+        id: checkout-libbitcoin-node
+        continue-on-error: true
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
@@ -794,7 +979,15 @@ jobs:
           ref: ${{ steps.get-branch.outputs.branch }}
           repository: ${{ github.repository_owner }}/libbitcoin-node
 
+      - name: Checkout repository [libbitcoin-node] cleanup on failure
+        continue-on-error: true
+        if: steps.checkout-libbitcoin-node.outcome == 'failure'
+        shell: powershell
+        run: |
+          Remove-Item -Path ${{ github.workspace }}\libbitcoin-node -Recurse -Force -ErrorAction SilentlyContinue
+
       - name: Checkout repository [libbitcoin-server]
+        id: checkout-libbitcoin-server
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
diff --git a/.gitignore b/.gitignore
index f8e691b4..c0f6145c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,11 @@
 # python bytecode
 *.pyc
 
+# store
+*.bin
+*.head
+*.data
+
 # gnu
 .deps
 Makefile