From a268fc0ad11dfb7a000729789ae71be987936a10 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 09:51:42 -0600
Subject: [PATCH 01/20] Update CI to run demo algorithms

---
 .github/actions/setup/action.yml   | 43 ++++++++++++++++++
 .github/workflows/build.yml        | 62 +++-----------------------
 .github/workflows/rename-build.yml | 71 ++++++++++++++++++++++++++++++
 3 files changed, 119 insertions(+), 57 deletions(-)
 create mode 100644 .github/actions/setup/action.yml
 create mode 100644 .github/workflows/rename-build.yml

diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
new file mode 100644
index 0000000..48ab550
--- /dev/null
+++ b/.github/actions/setup/action.yml
@@ -0,0 +1,43 @@
+name: Setup
+description: Liberate disk space, checkout Lean, pull foundation image, define docker helper
+
+runs:
+  using: composite
+  steps:
+    - name: Liberate disk space
+      uses: jlumbroso/free-disk-space@main
+      with:
+        tool-cache: true
+        large-packages: false
+        docker-images: false
+        swap-storage: false
+
+    - name: Checkout Lean Same Branch
+      id: lean-same-branch
+      uses: actions/checkout@v4
+      continue-on-error: true
+      with:
+        ref: ${{ github.ref }}
+        repository: QuantConnect/Lean
+        path: Lean
+
+    - name: Checkout Lean Master
+      if: steps.lean-same-branch.outcome != 'success'
+      uses: actions/checkout@v4
+      with:
+        repository: QuantConnect/Lean
+        path: Lean
+
+    - name: Move Lean
+      run: mv Lean ../Lean
+      shell: bash
+
+    - name: Pull foundation image
+      run: docker pull quantconnect/lean:foundation
+      shell: bash
+
+    - name: Define docker helper
+      run: |
+        echo 'runInContainer() { docker exec test-container "$@"; }' > $HOME/ci_functions.sh
+        echo "BASH_ENV=$HOME/ci_functions.sh" >> $GITHUB_ENV
+      shell: bash
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5093f4c..b2efbd8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,40 +13,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Liberate disk space
-        uses: jlumbroso/free-disk-space@main
-        with:
-          tool-cache: true
-          large-packages: false
-          docker-images: false
-          swap-storage: false
-
-      - name: Checkout Lean Same Branch
-        id: lean-same-branch
-        uses: actions/checkout@v4
-        continue-on-error: true
-        with:
-          ref: ${{ github.ref }}
-          repository: QuantConnect/Lean
-          path: Lean
-
-      - name: Checkout Lean Master
-        if: steps.lean-same-branch.outcome != 'success'
-        uses: actions/checkout@v4
-        with:
-          repository: QuantConnect/Lean
-          path: Lean
-
-      - name: Move Lean
-        run: mv Lean ../Lean
-
-      - name: Pull foundation image
-        run: docker pull quantconnect/lean:foundation
-
-      - name: Define docker helper
-        run: |
-          echo 'runInContainer() { docker exec test-container "$@"; }' > $HOME/ci_functions.sh
-          echo "BASH_ENV=$HOME/ci_functions.sh" >> $GITHUB_ENV
+      - name: Setup
+        uses: ./.github/actions/setup
 
       - name: Start container
         run: |
@@ -69,26 +37,6 @@ jobs:
       - name: Stop container
         run: docker rm -f test-container
 
-      - name: Rename Dataset
-        run: |
-          cp -r . ../Lean.DataSource.RenameDataset
-          cd ../Lean.DataSource.RenameDataset
-          python renameDataset.py RenameDataset
-
-      - name: Start container (renamed)
-        run: |
-          docker run -d \
-            --workdir /__w/Lean.DataSource.SDK/Lean.DataSource.RenameDataset \
-            -v /home/runner/work:/__w \
-            --name test-container \
-            quantconnect/lean:foundation \
-            tail -f /dev/null
-
-      - name: Build Renamed DataSource
-        run: runInContainer dotnet build ./QuantConnect.DataSource.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
-
-      - name: Build Renamed Tests
-        run: runInContainer dotnet build ./tests/Tests.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
-
-      - name: Run Renamed Tests
-        run: runInContainer dotnet test ./tests/bin/Release/net10.0/Tests.dll
+  rename:
+    needs: build
+    uses: ./.github/workflows/rename-build.yml
diff --git a/.github/workflows/rename-build.yml b/.github/workflows/rename-build.yml
new file mode 100644
index 0000000..69f1ff7
--- /dev/null
+++ b/.github/workflows/rename-build.yml
@@ -0,0 +1,71 @@
+name: Rename & Test
+
+on:
+  workflow_call:
+
+jobs:
+  rename-build:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup
+        uses: ./.github/actions/setup
+
+      - name: Rename Dataset
+        run: |
+          cp -r . ../Lean.DataSource.RenameDataset
+          cd ../Lean.DataSource.RenameDataset
+          python renameDataset.py RenameDataset
+
+      - name: Start container (renamed)
+        run: |
+          docker run -d \
+            --workdir /__w/Lean.DataSource.SDK/Lean.DataSource.RenameDataset \
+            -v /home/runner/work:/__w \
+            --name test-container \
+            quantconnect/lean:foundation \
+            tail -f /dev/null
+
+      - name: Build Renamed DataSource
+        run: runInContainer dotnet build ./QuantConnect.DataSource.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
+
+      - name: Build Renamed Tests
+        run: runInContainer dotnet build ./tests/Tests.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
+
+      - name: Run Renamed Tests
+        run: runInContainer dotnet test ./tests/bin/Release/net10.0/Tests.dll
+
+      - name: Build LEAN Launcher
+        run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
+
+      - name: Copy sample data to LEAN Data folder
+        run: cp -r ../Lean.DataSource.RenameDataset/output/* ../Lean/Data/
+
+      - name: Run C# Demonstration Algorithm
+        run: |
+          cat > ../Lean.DataSource.RenameDataset/demo-csharp-config.json << 'EOF'
+          {
+              "algorithm-type-name": "RenameDatasetAlgorithm",
+              "algorithm-language": "CSharp",
+              "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
+              "data-folder": "../Lean/Data/"
+          }
+          EOF
+          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
+
+      - name: Run Python Demonstration Algorithm
+        run: |
+          cat > ../Lean.DataSource.RenameDataset/demo-python-config.json << 'EOF'
+          {
+              "algorithm-type-name": "RenameDatasetAlgorithm",
+              "algorithm-language": "Python",
+              "algorithm-location": "RenameDatasetAlgorithm.py",
+              "data-folder": "../Lean/Data/"
+          }
+          EOF
+          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
+
+      - name: Stop container
+        run: docker rm -f test-container

From 273bc5afe9d1fb3bad9a3d5e991ca4cb6d16760c Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 10:07:36 -0600
Subject: [PATCH 02/20] address review

---
 .github/workflows/build.yml        | 51 ++++++++++++++++++++++++++++--
 .github/workflows/rename-build.yml | 31 +++---------------
 2 files changed, 53 insertions(+), 29 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b2efbd8..9055fbf 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,6 +37,51 @@ jobs:
       - name: Stop container
         run: docker rm -f test-container
 
-  rename:
-    needs: build
-    uses: ./.github/workflows/rename-build.yml
+      - name: Run C# Demonstration Algorithm
+        run: |
+          cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
+          {
+              "algorithm-type-name": "Demostration",
+              "algorithm-language": "CSharp",
+              "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
+              "data-folder": "../Lean/Data/"
+          }
+          EOF
+          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
+
+      - name: Run Python Demonstration Algorithm
+        run: |
+          cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
+          {
+              "algorithm-type-name": "Demostration",
+              "algorithm-language": "Python",
+              "algorithm-location": "Demostration.py",
+              "data-folder": "../Lean/Data/"
+          }
+          EOF
+          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
+
+      - name: Run C# Demonstration Universe Algorithm
+        run: |
+          cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
+          {
+              "algorithm-type-name": "DemostrationUniverse",
+              "algorithm-language": "CSharp",
+              "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
+              "data-folder": "../Lean/Data/"
+          }
+          EOF
+          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
+
+      - name: Run Python Demonstration Universe Algorithm
+        run: |
+          cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
+          {
+              "algorithm-type-name": "DemostrationUniverse",
+              "algorithm-language": "Python",
+              "algorithm-location": "DemostrationUniverse.py",
+              "data-folder": "../Lean/Data/"
+          }
+          EOF
+          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
+
diff --git a/.github/workflows/rename-build.yml b/.github/workflows/rename-build.yml
index 69f1ff7..e3ed095 100644
--- a/.github/workflows/rename-build.yml
+++ b/.github/workflows/rename-build.yml
@@ -1,10 +1,14 @@
 name: Rename & Test
 
 on:
-  workflow_call:
+  push:
+    branches: ['*']
+  pull_request:
+    branches: [master]
 
 jobs:
   rename-build:
+    if: github.repository == 'QuantConnect/Lean.DataSource.SDK'
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
@@ -43,29 +47,4 @@ jobs:
       - name: Copy sample data to LEAN Data folder
         run: cp -r ../Lean.DataSource.RenameDataset/output/* ../Lean/Data/
 
-      - name: Run C# Demonstration Algorithm
-        run: |
-          cat > ../Lean.DataSource.RenameDataset/demo-csharp-config.json << 'EOF'
-          {
-              "algorithm-type-name": "RenameDatasetAlgorithm",
-              "algorithm-language": "CSharp",
-              "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
-              "data-folder": "../Lean/Data/"
-          }
-          EOF
-          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
-
-      - name: Run Python Demonstration Algorithm
-        run: |
-          cat > ../Lean.DataSource.RenameDataset/demo-python-config.json << 'EOF'
-          {
-              "algorithm-type-name": "RenameDatasetAlgorithm",
-              "algorithm-language": "Python",
-              "algorithm-location": "RenameDatasetAlgorithm.py",
-              "data-folder": "../Lean/Data/"
-          }
-          EOF
-          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
 
-      - name: Stop container
-        run: docker rm -f test-container

From 88b9da17e4a696bc886ac5e54f2d5184124ebf13 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 10:24:04 -0600
Subject: [PATCH 03/20] Address review 2

---
 .github/workflows/build.yml        | 23 +++++++++++++----------
 .github/workflows/rename-build.yml |  8 --------
 renameDataset.py                   |  2 ++
 3 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9055fbf..83c9414 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,6 +16,9 @@ jobs:
       - name: Setup
         uses: ./.github/actions/setup
 
+      - name: Copy sample data to LEAN Data folder
+        run: cp -r ../Lean.DataSource.SDK/output/* ../Lean/Data/
+
       - name: Start container
         run: |
           docker run -d \
@@ -37,11 +40,11 @@ jobs:
       - name: Stop container
         run: docker rm -f test-container
 
-      - name: Run C# Demonstration Algorithm
+      - name: Run C# Demo Algorithm
         run: |
           cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
           {
-              "algorithm-type-name": "Demostration",
+              "algorithm-type-name": "Demonstration",
               "algorithm-language": "CSharp",
               "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
               "data-folder": "../Lean/Data/"
@@ -49,23 +52,23 @@ jobs:
           EOF
           runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
 
-      - name: Run Python Demonstration Algorithm
+      - name: Run Python Demo Algorithm
         run: |
           cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
           {
-              "algorithm-type-name": "Demostration",
+              "algorithm-type-name": "Demonstration",
               "algorithm-language": "Python",
-              "algorithm-location": "Demostration.py",
+              "algorithm-location": "Demonstration.py",
               "data-folder": "../Lean/Data/"
           }
           EOF
           runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
 
-      - name: Run C# Demonstration Universe Algorithm
+      - name: Run C# Universe Demo Algorithm
         run: |
           cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
           {
-              "algorithm-type-name": "DemostrationUniverse",
+              "algorithm-type-name": "DemonstrationUniverse",
               "algorithm-language": "CSharp",
               "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
               "data-folder": "../Lean/Data/"
@@ -73,13 +76,13 @@ jobs:
           EOF
           runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
 
-      - name: Run Python Demonstration Universe Algorithm
+      - name: Run Python Universe Demo Algorithm
         run: |
           cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
           {
-              "algorithm-type-name": "DemostrationUniverse",
+              "algorithm-type-name": "DemonstrationUniverse",
               "algorithm-language": "Python",
-              "algorithm-location": "DemostrationUniverse.py",
+              "algorithm-location": "DemonstrationUniverse.py",
               "data-folder": "../Lean/Data/"
           }
           EOF
diff --git a/.github/workflows/rename-build.yml b/.github/workflows/rename-build.yml
index e3ed095..a28d5a8 100644
--- a/.github/workflows/rename-build.yml
+++ b/.github/workflows/rename-build.yml
@@ -40,11 +40,3 @@ jobs:
 
       - name: Run Renamed Tests
         run: runInContainer dotnet test ./tests/bin/Release/net10.0/Tests.dll
-
-      - name: Build LEAN Launcher
-        run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
-
-      - name: Copy sample data to LEAN Data folder
-        run: cp -r ../Lean.DataSource.RenameDataset/output/* ../Lean/Data/
-
-
diff --git a/renameDataset.py b/renameDataset.py
index 51ac68f..33d12f3 100644
--- a/renameDataset.py
+++ b/renameDataset.py
@@ -98,6 +98,7 @@ def main():
     # --- Text replacements ---
     # Order matters: longer/more-specific patterns first to avoid partial matches
     replacements = [
+        ("Lean.DataSource.SDK", root.name),
         ("MyCustomDataQueueHandler", f"{name}DataQueueHandler"),
         ("MyCustomDataDownloader", downloader_name),
         ("MyCustomDataProvider", provider_name),
@@ -132,6 +133,7 @@ def main():
         "tests/Tests.csproj",
         "DataProcessing/MyCustomDataDownloader.cs",
         "DataProcessing/Program.cs",
+        ".github/workflows/build.yml",
     ]
 
     print("Text replacements:")

From f56b503cd0c3ce57939f7bc6a8b61aea90029684 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 10:59:37 -0600
Subject: [PATCH 04/20] Stop the container after running demo algos

---
 .github/workflows/build.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 83c9414..18056f6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,9 +37,6 @@ jobs:
       - name: Run Tests
         run: runInContainer dotnet test ./tests/bin/Release/net10.0/Tests.dll
 
-      - name: Stop container
-        run: docker rm -f test-container
-
       - name: Run C# Demo Algorithm
         run: |
           cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
@@ -88,3 +85,6 @@ jobs:
           EOF
           runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
 
+      - name: Stop container
+        run: docker rm -f test-container
+

From 14e604cb99bc2f6faa840eb18e9a5f0932cb9a29 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 11:15:17 -0600
Subject: [PATCH 05/20] Build the lean launcher before running demos

---
 .github/workflows/build.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 18056f6..065cc1b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,6 +37,9 @@ jobs:
       - name: Run Tests
         run: runInContainer dotnet test ./tests/bin/Release/net10.0/Tests.dll
 
+      - name: Build LEAN Launcher
+        run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
+
       - name: Run C# Demo Algorithm
         run: |
           cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'

From 46a4ab51b154be6d07b7c10c6126b5fcd24c4b79 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 11:54:19 -0600
Subject: [PATCH 06/20] Fix failing CI

---
 .github/workflows/build.yml | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 065cc1b..f74393e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,9 +37,6 @@ jobs:
       - name: Run Tests
         run: runInContainer dotnet test ./tests/bin/Release/net10.0/Tests.dll
 
-      - name: Build LEAN Launcher
-        run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /v:quiet /p:WarningLevel=1
-
       - name: Run C# Demo Algorithm
         run: |
           cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
@@ -50,7 +47,7 @@ jobs:
               "data-folder": "../Lean/Data/"
           }
           EOF
-          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
+          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-csharp-config.json
 
       - name: Run Python Demo Algorithm
         run: |
@@ -62,7 +59,7 @@ jobs:
               "data-folder": "../Lean/Data/"
           }
           EOF
-          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
+          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-python-config.json
 
       - name: Run C# Universe Demo Algorithm
         run: |
@@ -74,7 +71,7 @@ jobs:
               "data-folder": "../Lean/Data/"
           }
           EOF
-          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-csharp-config.json
+          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-csharp-config.json
 
       - name: Run Python Universe Demo Algorithm
         run: |
@@ -86,8 +83,11 @@ jobs:
               "data-folder": "../Lean/Data/"
           }
           EOF
-          runInContainer dotnet ../Lean/Launcher/bin/Release/net10.0/QuantConnect.Lean.Launcher.dll --config ./demo-python-config.json
+          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-python-config.json
 
       - name: Stop container
         run: docker rm -f test-container
 
+  rename:
+    needs: build
+    uses: ./.github/workflows/rename-build.yml

From 0980399e96b480a6af8435f5363fc328eafcbcc5 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 13:15:54 -0600
Subject: [PATCH 07/20] Make both workflows run

---
 .github/workflows/rename-build.yml | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/.github/workflows/rename-build.yml b/.github/workflows/rename-build.yml
index a28d5a8..09ff15f 100644
--- a/.github/workflows/rename-build.yml
+++ b/.github/workflows/rename-build.yml
@@ -1,10 +1,7 @@
 name: Rename & Test
 
 on:
-  push:
-    branches: ['*']
-  pull_request:
-    branches: [master]
+  workflow_call:
 
 jobs:
   rename-build:

From d5b6e0c264fddc87f6183d98f6de9fd2b5b91050 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 13:41:59 -0600
Subject: [PATCH 08/20] Fix algorithm-type-name in config files

---
 .github/workflows/build.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f74393e..79d79f8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,7 +41,7 @@ jobs:
         run: |
           cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
           {
-              "algorithm-type-name": "Demonstration",
+              "algorithm-type-name": "CustomDataAlgorithm",
               "algorithm-language": "CSharp",
               "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
               "data-folder": "../Lean/Data/"
@@ -53,7 +53,7 @@ jobs:
         run: |
           cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
           {
-              "algorithm-type-name": "Demonstration",
+              "algorithm-type-name": "CustomDataAlgorithm",
               "algorithm-language": "Python",
               "algorithm-location": "Demonstration.py",
               "data-folder": "../Lean/Data/"
@@ -65,7 +65,7 @@ jobs:
         run: |
           cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
           {
-              "algorithm-type-name": "DemonstrationUniverse",
+              "algorithm-type-name": "CustomDataUniverse",
               "algorithm-language": "CSharp",
               "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
               "data-folder": "../Lean/Data/"
@@ -77,7 +77,7 @@ jobs:
         run: |
           cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
           {
-              "algorithm-type-name": "DemonstrationUniverse",
+              "algorithm-type-name": "CustomDataUniverse",
               "algorithm-language": "Python",
               "algorithm-location": "DemonstrationUniverse.py",
               "data-folder": "../Lean/Data/"

From a3719433aca896ad64977cf34689051df4e9429b Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 14:50:09 -0600
Subject: [PATCH 09/20] Update demo algorithm run commands

---
 .github/workflows/build.yml | 47 ++++++-------------------------------
 1 file changed, 7 insertions(+), 40 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 79d79f8..c60ac65 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,53 +37,20 @@ jobs:
       - name: Run Tests
         run: runInContainer dotnet test ./tests/bin/Release/net10.0/Tests.dll
 
+      - name: Build LEAN Launcher
+        run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /p:OutputPath=bin/Release /v:quiet /p:WarningLevel=1
+
       - name: Run C# Demo Algorithm
-        run: |
-          cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
-          {
-              "algorithm-type-name": "CustomDataAlgorithm",
-              "algorithm-language": "CSharp",
-              "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
-              "data-folder": "../Lean/Data/"
-          }
-          EOF
-          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-csharp-config.json
+        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll" --log-handler ConsoleErrorLogHandler --close-automatically true
 
       - name: Run Python Demo Algorithm
-        run: |
-          cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
-          {
-              "algorithm-type-name": "CustomDataAlgorithm",
-              "algorithm-language": "Python",
-              "algorithm-location": "Demonstration.py",
-              "data-folder": "../Lean/Data/"
-          }
-          EOF
-          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-python-config.json
+        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py" --log-handler ConsoleErrorLogHandler --close-automatically true
 
       - name: Run C# Universe Demo Algorithm
-        run: |
-          cat > ../Lean.DataSource.SDK/demo-csharp-config.json << 'EOF'
-          {
-              "algorithm-type-name": "CustomDataUniverse",
-              "algorithm-language": "CSharp",
-              "algorithm-location": "tests/bin/Release/net10.0/Tests.dll",
-              "data-folder": "../Lean/Data/"
-          }
-          EOF
-          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-csharp-config.json
+        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll" --log-handler ConsoleErrorLogHandler --close-automatically true
 
       - name: Run Python Universe Demo Algorithm
-        run: |
-          cat > ../Lean.DataSource.SDK/demo-python-config.json << 'EOF'
-          {
-              "algorithm-type-name": "CustomDataUniverse",
-              "algorithm-language": "Python",
-              "algorithm-location": "DemonstrationUniverse.py",
-              "data-folder": "../Lean/Data/"
-          }
-          EOF
-          runInContainer dotnet run --project ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj --configuration Release -- --config ./demo-python-config.json
+        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language Python --algorithm-type-name CustomDataUniverse --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py" --log-handler ConsoleErrorLogHandler --close-automatically true
 
       - name: Stop container
         run: docker rm -f test-container

From a23a21508566acc4088dbd3f0dd9863c913801a2 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 15:07:05 -0600
Subject: [PATCH 10/20] Adjust the run commands

---
 .github/workflows/build.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c60ac65..96ecb8c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,16 +41,16 @@ jobs:
         run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /p:OutputPath=bin/Release /v:quiet /p:WarningLevel=1
 
       - name: Run C# Demo Algorithm
-        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll" --log-handler ConsoleErrorLogHandler --close-automatically true
+        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Demo Algorithm
-        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py" --log-handler ConsoleErrorLogHandler --close-automatically true
+        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run C# Universe Demo Algorithm
-        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll" --log-handler ConsoleErrorLogHandler --close-automatically true
+        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Universe Demo Algorithm
-        run: runInContainer dotnet ../Lean/Launcher/bin/Release/QuantConnect.Lean.Launcher.dll --data-folder "/__w/Lean.DataSource.SDK/Lean/Data/" --algorithm-language Python --algorithm-type-name CustomDataUniverse --algorithm-location "/__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py" --log-handler ConsoleErrorLogHandler --close-automatically true
+        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Stop container
         run: docker rm -f test-container

From 0d92dc23968e7f88107d8f23b296d1ef3de9303e Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 15:24:01 -0600
Subject: [PATCH 11/20] Fix paths

---
 .github/workflows/build.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 96ecb8c..bf50759 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,16 +41,16 @@ jobs:
         run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /p:OutputPath=bin/Release /v:quiet /p:WarningLevel=1
 
       - name: Run C# Demo Algorithm
-        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Demo Algorithm
-        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run C# Universe Demo Algorithm
-        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Universe Demo Algorithm
-        run: runInContainer bash -c "cd ./Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Stop container
         run: docker rm -f test-container

From f661793401ab9f7f891006bb2d26e2762fb1f3aa Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 15:51:37 -0600
Subject: [PATCH 12/20] Fix path slashes and fix language arg

---
 .github/workflows/build.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bf50759..11c30ad 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,16 +41,16 @@ jobs:
         run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /p:OutputPath=bin/Release /v:quiet /p:WarningLevel=1
 
       - name: Run C# Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run C# Universe Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Universe Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet .\QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language python--algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Stop container
         run: docker rm -f test-container

From edc86a847b0434c1fafecfa0e5f21b68047f7d0f Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 16:16:21 -0600
Subject: [PATCH 13/20] Copy DataSource to LEAN Launcher

---
 .github/workflows/build.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 11c30ad..d94422d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -40,6 +40,9 @@ jobs:
       - name: Build LEAN Launcher
         run: runInContainer dotnet build ../Lean/Launcher/QuantConnect.Lean.Launcher.csproj /p:Configuration=Release /p:OutputPath=bin/Release /v:quiet /p:WarningLevel=1
 
+      - name: Copy DataSource to LEAN Launcher
+        run: runInContainer cp ./tests/bin/Release/net10.0/QuantConnect.DataSource.MyCustomDataType.dll ../Lean/Launcher/bin/Release/
+
       - name: Run C# Demo Algorithm
         run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 

From f3bcd52938cd699075352139d923eeb5a88e6c5b Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 16:39:49 -0600
Subject: [PATCH 14/20] Fix Python demo algorithm CI steps

---
 .github/workflows/build.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d94422d..cdb9d2e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -47,13 +47,13 @@ jobs:
         run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true || [ $? -eq 134 ]'
 
       - name: Run C# Universe Demo Algorithm
         run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
 
       - name: Run Python Universe Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true || [ $? -eq 134 ]'
 
       - name: Stop container
         run: docker rm -f test-container

From 7f0824a5968c94926e111af2485218888f931158 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Wed, 11 Mar 2026 17:11:47 -0600
Subject: [PATCH 15/20] Remove log-handler

---
 .github/workflows/build.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cdb9d2e..00a67a8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -44,16 +44,16 @@ jobs:
         run: runInContainer cp ./tests/bin/Release/net10.0/QuantConnect.DataSource.MyCustomDataType.dll ../Lean/Launcher/bin/Release/
 
       - name: Run C# Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --close-automatically true"
 
       - name: Run Python Demo Algorithm
-        run: runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --log-handler ConsoleErrorLogHandler --close-automatically true || [ $? -eq 134 ]'
+        run: runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --close-automatically true || [ $? -eq 134 ]'
 
       - name: Run C# Universe Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --log-handler ConsoleErrorLogHandler --close-automatically true"
+        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --close-automatically true"
 
       - name: Run Python Universe Demo Algorithm
-        run: runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --log-handler ConsoleErrorLogHandler --close-automatically true || [ $? -eq 134 ]'
+        run: runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/DemonstrationUniverse.py --close-automatically true || [ $? -eq 134 ]'
 
       - name: Stop container
         run: docker rm -f test-container

From 02c33a270a6697434d47d39af7cda17516f23f28 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Fri, 13 Mar 2026 11:23:42 -0600
Subject: [PATCH 16/20] Update demo algorithm to check for trades

---
 Demonstration.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Demonstration.py b/Demonstration.py
index 745a3d4..f8412d9 100644
--- a/Demonstration.py
+++ b/Demonstration.py
@@ -45,3 +45,7 @@ def OnOrderEvent(self, orderEvent):
         '''
         if orderEvent.Status == OrderStatus.Filled:
             self.Debug(f'Purchased Stock: {orderEvent.Symbol}')
+    
+    def OnEndOfAlgorithm(self):
+        if self.Transactions.Count == 0:
+            raise Exception("No trades")

From 2f1c572a1d009f2915a678c898b5148926ace840 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Fri, 13 Mar 2026 16:47:23 -0600
Subject: [PATCH 17/20] Update Python algorithms to PEP8

---
 Demonstration.py         | 39 ++++++++++++++++++---------------------
 DemonstrationUniverse.py | 29 +++++++++++++++--------------
 2 files changed, 33 insertions(+), 35 deletions(-)

diff --git a/Demonstration.py b/Demonstration.py
index f8412d9..cbc301f 100644
--- a/Demonstration.py
+++ b/Demonstration.py
@@ -17,35 +17,32 @@
 ### Example algorithm using the custom data type as a source of alpha
 ### </summary>
 class CustomDataAlgorithm(QCAlgorithm):
-    def Initialize(self):
+    
+    def initialize(self):
         ''' Initialise the data and resolution required, as well as the cash and start-end dates for your algorithm. All algorithms must initialized.'''
-        
-        self.SetStartDate(2020, 10, 7)   #Set Start Date
-        self.SetEndDate(2020, 10, 11)    #Set End Date
-        self.equity_symbol = self.AddEquity("SPY", Resolution.Daily).Symbol
-        self.custom_data_symbol = self.AddData(MyCustomDataType, self.equity_symbol).Symbol
+        self.set_start_date(2013, 10, 7)
+        self.set_end_date(2013, 10, 11)
+        self._equity_symbol = self.add_equity("SPY", Resolution.DAILY).symbol
+        self._custom_data_symbol = self.add_data(MyCustomDataType, self._equity_symbol).symbol
 
-    def OnData(self, slice):
+    def on_data(self, slice):
         ''' OnData event is the primary entry point for your algorithm. Each new data point will be pumped in here.
 
         :param Slice slice: Slice object keyed by symbol containing the stock data
         '''
-        data = slice.Get(MyCustomDataType)
-        if data:
-            custom_data = data[self.custom_data_symbol]
-            if custom_data.SomeCustomProperty == "buy":
-                self.SetHoldings(self.equitySymbol, 1)
-            elif custom_data.SomeCustomProperty == "sell":
-                self.SetHoldings(self.equitySymbol, -1)
+        custom_data = slice.get(MyCustomDataType)
+        if custom_data:
+            point = custom_data[self._custom_data_symbol]
+            if point.some_custom_property == "buy":
+                self.set_holdings(self._equity_symbol, 1)
+            elif point.some_custom_property == "sell":
+                self.set_holdings(self._equity_symbol, -1)
 
-    def OnOrderEvent(self, orderEvent):
+    def on_order_event(self, order_event):
         ''' Order fill event handler. On an order fill update the resulting information is passed to this method.
 
-        :param OrderEvent orderEvent: Order event details containing details of the events
+        :param OrderEvent order_event: Order event details containing details of the events
         '''
-        if orderEvent.Status == OrderStatus.Filled:
-            self.Debug(f'Purchased Stock: {orderEvent.Symbol}')
+        if order_event.status == OrderStatus.FILLED:
+            self.debug(f'Purchased Stock: {order_event.symbol}')
     
-    def OnEndOfAlgorithm(self):
-        if self.Transactions.Count == 0:
-            raise Exception("No trades")
diff --git a/DemonstrationUniverse.py b/DemonstrationUniverse.py
index c7fa358..14cd425 100644
--- a/DemonstrationUniverse.py
+++ b/DemonstrationUniverse.py
@@ -17,42 +17,43 @@
 ### Example algorithm using the custom data type as a source of alpha
 ### </summary>
 class CustomDataUniverse(QCAlgorithm):
-    def Initialize(self):
+
+    def initialize(self):
         ''' Initialise the data and resolution required, as well as the cash and start-end dates for your algorithm. All algorithms must initialized. '''
 
         # Data ADDED via universe selection is added with Daily resolution.
-        self.UniverseSettings.Resolution = Resolution.Daily
+        self.universe_settings.resolution = Resolution.DAILY
 
-        self.SetStartDate(2022, 2, 14)
-        self.SetEndDate(2022, 2, 18)
-        self.SetCash(100000)
+        self.set_start_date(2022, 2, 14)
+        self.set_end_date(2022, 2, 18)
+        self.set_cash(100000)
 
         # add a custom universe data source (defaults to usa-equity)
-        universe = self.AddUniverse(MyCustomDataUniverse, self.UniverseSelection)
+        universe = self.add_universe(MyCustomDataUniverse, self._universe_selection)
 
-        history = self.History(universe, TimeSpan(1, 0, 0, 0))
+        history = self.history(universe, 1)
         if len(history) != 1:
             raise ValueError(f"Unexpected history count {len(history)}! Expected 1")
 
-        for dataForDate in history:
-            if len(dataForDate) < 300:
+        for data_for_date in history:
+            if len(data_for_date) < 300:
                 raise ValueError(f"Unexpected historical universe data!")
 
-    def UniverseSelection(self, data):
+    def _universe_selection(self, data):
         ''' Selected the securities
         
         :param List of MyCustomUniverseType data: List of MyCustomUniverseType
         :return: List of Symbol objects '''
 
         for datum in data:
-            self.Log(f"{datum.Symbol},{datum.SomeNumericProperty},{datum.SomeCustomProperty}")
+            self.log(f"{datum.symbol},{datum.some_numeric_property},{datum.some_custom_property}")
         
         # define our selection criteria
-        return [d.Symbol for d in data if d.SomeCustomProperty == 'buy']
+        return [d.symbol for d in data if d.some_custom_property == 'buy']
 
-    def OnSecuritiesChanged(self, changes):
+    def on_securities_changed(self, changes):
         ''' Event fired each time that we add/remove securities from the data feed
 		
         :param SecurityChanges changes: Security additions/removals for this time step
         '''
-        self.Log(changes.ToString())
\ No newline at end of file
+        self.log(changes.to_string())
\ No newline at end of file

From 0c95d09d55395b6a7876e92579e7c418cf8e5a6c Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Fri, 13 Mar 2026 16:47:39 -0600
Subject: [PATCH 18/20] Scan logs to ensure the demo algos trade

---
 .github/workflows/build.yml | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 00a67a8..e333dcd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -44,10 +44,18 @@ jobs:
         run: runInContainer cp ./tests/bin/Release/net10.0/QuantConnect.DataSource.MyCustomDataType.dll ../Lean/Launcher/bin/Release/
 
       - name: Run C# Demo Algorithm
-        run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --close-automatically true"
+        run: |
+          output=$(runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --close-automatically true" 2>&1)
+          echo "$output"
+          echo "$output" | grep -q "STATISTICS:: Total Orders [^0]" || { echo "Algorithm placed no trades"; exit 1; }
 
       - name: Run Python Demo Algorithm
-        run: runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --close-automatically true || [ $? -eq 134 ]'
+        run: |
+          output=$(runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --close-automatically true' 2>&1)
+          rc=$?
+          echo "$output"
+          [ $rc -eq 0 ] || [ $rc -eq 134 ] || exit $rc
+          echo "$output" | grep -q "STATISTICS:: Total Orders [^0]" || { echo "Algorithm placed no trades"; exit 1; }
 
       - name: Run C# Universe Demo Algorithm
         run: runInContainer bash -c "cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language CSharp --algorithm-type-name CustomDataUniverse --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/tests/bin/Release/net10.0/Tests.dll --close-automatically true"

From 4f339b1de7185d8eee40ff9b33d5bdd9a4e65806 Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Mon, 16 Mar 2026 08:37:05 -0600
Subject: [PATCH 19/20] Suppress Python GIL exit code so trade check can run

---
 .github/workflows/build.yml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e333dcd..fa5e487 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -51,10 +51,8 @@ jobs:
 
       - name: Run Python Demo Algorithm
         run: |
-          output=$(runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --close-automatically true' 2>&1)
-          rc=$?
+          output=$(runInContainer bash -c 'cd ../Lean/Launcher/bin/Release && dotnet ./QuantConnect.Lean.Launcher.dll --data-folder /__w/Lean.DataSource.SDK/Lean/Data/ --algorithm-language Python --algorithm-type-name CustomDataAlgorithm --algorithm-location /__w/Lean.DataSource.SDK/Lean.DataSource.SDK/Demonstration.py --close-automatically true' 2>&1) || true
           echo "$output"
-          [ $rc -eq 0 ] || [ $rc -eq 134 ] || exit $rc
           echo "$output" | grep -q "STATISTICS:: Total Orders [^0]" || { echo "Algorithm placed no trades"; exit 1; }
 
       - name: Run C# Universe Demo Algorithm

From 45b50cf3fd4ae98c2554d390ff278716beb8674d Mon Sep 17 00:00:00 2001
From: Derek Melchin <melchin.derek@gmail.com>
Date: Mon, 16 Mar 2026 09:32:21 -0600
Subject: [PATCH 20/20] Update checkout to v5 and fix Lean branch ref for PRs

---
 .github/actions/setup/action.yml   | 6 +++---
 .github/workflows/build.yml        | 2 +-
 .github/workflows/rename-build.yml | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index 48ab550..be88df1 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -14,16 +14,16 @@ runs:
 
     - name: Checkout Lean Same Branch
       id: lean-same-branch
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       continue-on-error: true
       with:
-        ref: ${{ github.ref }}
+        ref: ${{ github.head_ref || github.ref_name }}
         repository: QuantConnect/Lean
         path: Lean
 
     - name: Checkout Lean Master
       if: steps.lean-same-branch.outcome != 'success'
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: QuantConnect/Lean
         path: Lean
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fa5e487..3599f13 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup
         uses: ./.github/actions/setup
diff --git a/.github/workflows/rename-build.yml b/.github/workflows/rename-build.yml
index 09ff15f..8130044 100644
--- a/.github/workflows/rename-build.yml
+++ b/.github/workflows/rename-build.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Setup
         uses: ./.github/actions/setup