Presentations/vegas

.copilot/mcp-config.json

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+{
+  "mcpServers": {
+    "EXAMPLE-trello": {
+      "command": "npx",
+      "args": [
+        "-y",
+        "@trello/mcp-server"
+      ],
+      "env": {
+        "TRELLO_API_KEY": "${TRELLO_API_KEY}",
+        "TRELLO_TOKEN": "${TRELLO_TOKEN}"
+      }
+    }
+  }
+}

.gitattributes

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+# Squad: union merge for append-only team state files
+.squad/decisions.md merge=union
+.squad/agents/*/history.md merge=union
+.squad/log/** merge=union
+.squad/orchestration-log/** merge=union

.github/copilot-instructions.md

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+# Copilot Instructions — Time Travelling Data
+
+This is a conference presentation repository for a session on **SQL Server Temporal Tables**. It contains two parallel demo tracks (T-SQL and EF Core), each in two variants (full and "fast" for 2-minute conference delivery).
+
+## Repository Layout
+
+```
+Demos/
+  SQLDemo/          # Full T-SQL demo — 15 numbered .sql scripts run in SSMS
+  SQLDemoFast/      # 2-minute T-SQL demo — 3 scripts (01-Setup, 02-Observe, 03-TimeTravel)
+  EFCoreDemo/       # Full EF Core demo — .NET 6 console app, LocalDB
+  EFCoreDemoFast/   # 2-minute EF Core demo — .NET 10 console app, Azure SQL
+  FastSetup/        # Shared Terraform for provisioning Azure SQL Server + both databases
+Presentations/      # PDF slide decks from past events
+Resources/          # Supporting materials
+```
+
+## Building and Running
+
+### EFCoreDemoFast (.NET 10 — current "fast" demo)
+
+```bash
+cd Demos/EFCoreDemoFast
+dotnet restore
+dotnet run
+```
+
+Before running, copy and configure the connection string:
+```bash
+cp appsettings.example.json appsettings.json
+# Edit appsettings.json — set DefaultConnection to your Azure SQL connection string
+```
+
+The app drops and recreates the `Employees` temporal table on each run — safe to run repeatedly.
+
+### EFCoreDemo (.NET 6 — full demo, LocalDB)
+
+```bash
+cd Demos/EFCoreDemo
+dotnet ef database update   # Creates TTD_EFCore database on LocalDB
+dotnet run
+```
+
+### SQLDemoFast
+
+Run `01-Setup.sql`, `02-Observe.sql`, `03-TimeTravel.sql` in order in SSMS against the `TemporalDemo` database.
+
+### SQLDemo (full)
+
+Run the numbered scripts in order from within SSMS. Scripts are grouped in folders by topic.
+
+### Infrastructure (Azure SQL)
+
+```bash
+cd Demos/FastSetup/terraform
+cp terraform.tfvars.example terraform.tfvars
+# Edit terraform.tfvars — add subscription ID, location, SQL password
+terraform init
+terraform apply
+```
+
+One `terraform apply` provisions the server and both databases (`TemporalDemo` for SQL demo, `TemporalEFDemo` for EF demo).
+
+## Key Conventions
+
+### Two parallel tracks, same domain
+
+Both the SQL and EF Core demos use an **Employee** domain (name, title, salary, department) on purpose — the narrative maps directly between the T-SQL `FOR SYSTEM_TIME` clauses and EF Core's `TemporalAll()` / `TemporalAsOf()` / `TemporalBetween()` / etc. Keep the domains in sync when updating demos.
+
+### EF Core temporal configuration
+
+Temporal tables are enabled with a single fluent API call — no period columns on the POCO:
+
+```csharp
+entity.ToTable(tb => tb.IsTemporal());
+```
+
+EF manages `PeriodStart`/`PeriodEnd` as **shadow properties**. Access them via:
+```csharp
+EF.Property<DateTime>(emp, "PeriodStart")
+```
+
+### EFCoreDemoFast resets on every run
+
+`Program.cs` drops and recreates the `Employees` table via raw SQL before seeding. This is intentional for reliable demo resets. The `Migrations/` folder is reference material showing what EF generates — it is not used at runtime in the fast demo.
+
+### EFCoreDemo (full) uses EF migrations
+
+The full demo uses `dotnet ef database update` against `(localdb)\MSSQLLocalDB`, database `TTD_EFCore`. The migration is in `Demos/EFCoreDemo/Migrations/`.
+
+### SQL demo uses HIDDEN period columns
+
+In the SQL demo, `ValidFrom`/`ValidTo` are declared `HIDDEN` — they don't appear in `SELECT *`. To see them, name them explicitly:
+```sql
+SELECT EmployeeId, EmployeeName, ValidFrom, ValidTo FROM dbo.Employee;
+```
+
+### Connection strings are gitignored
+
+`appsettings.json` in `EFCoreDemoFast/` is gitignored. The safe placeholder is `appsettings.example.json`. Never commit real connection strings.
+
+### EF Core temporal query mapping
+
+| EF Core method | T-SQL equivalent |
+|----------------|-----------------|
+| `TemporalAll()` | `FOR SYSTEM_TIME ALL` |
+| `TemporalAsOf(dt)` | `FOR SYSTEM_TIME AS OF` |
+| `TemporalBetween(start, end)` | `FOR SYSTEM_TIME BETWEEN` |
+| `TemporalFromTo(start, end)` | `FOR SYSTEM_TIME FROM ... TO` |
+| `TemporalContainedIn(start, end)` | `FOR SYSTEM_TIME CONTAINED IN` |

.github/workflows/squad-ci.yml

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+name: Squad CI
+# Project type was not detected — configure build/test commands below
+
+on:
+  pull_request:
+    branches: [dev, preview, main, insider]
+    types: [opened, synchronize, reopened]
+  push:
+    branches: [dev, insider]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build and test
+        run: |
+          # TODO: Project type was not detected — add your build/test commands here
+          # Go:            go test ./...
+          # Python:        pip install -r requirements.txt && pytest
+          # .NET:          dotnet test
+          # Java (Maven):  mvn test
+          # Java (Gradle): ./gradlew test
+          echo "No build commands configured — update squad-ci.yml"

.github/workflows/squad-docs.yml

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+name: Squad Docs — Build & Deploy
+# Project type was not detected — configure documentation build commands below
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [preview]
+    paths:
+      - 'docs/**'
+      - '.github/workflows/squad-docs.yml'
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build docs
+        run: |
+          # TODO: Add your documentation build commands here
+          # This workflow is optional — remove or customize it for your project
+          echo "No docs build commands configured — update or remove squad-docs.yml"