feat(asdk): Final deprecation of asdk

.github/workflows/release.yml

@@ -18,6 +18,22 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
+    - name: Check deprecation date
+      shell: pwsh
+      run: |
+        $deprecationDate = [datetime]"2026-08-31"
+        $currentDate = Get-Date
+
+        if ($currentDate -gt $deprecationDate) {
+            Write-Error "ERROR: SDK deprecation date has passed (2026-08-31)"
+            Write-Error "Publishing to NuGet is disabled after the deprecation date."
+            exit 1
+        }
+
+        $daysRemaining = ($deprecationDate - $currentDate).Days
+        Write-Host "Days until deprecation: $daysRemaining"
+        Write-Host "Publishing allowed"
+
     - name: Setup Nuget
       uses: nuget/setup-nuget@v1
       with:

DEPRECATION.md

@@ -0,0 +1,202 @@
+# Analytics SDK .NET - Deprecation Notice
+
+**Status**: ⚠️ **DEPRECATED** - Effective August 31, 2026
+
+---
+
+## Important Notice
+
+The **FactSet Analytics SDK for .NET** (`FactSet.AnalyticsAPI.Engines`) is **officially deprecated** as of **August 31, 2026**.
+
+### Timeline
+
+| Date | Status | Action |
+|------|--------|--------|
+| **Until Aug 31, 2026** | Active | Limited security fixes only |
+| **Aug 31, 2026** | Final Release | Last day of support - FINAL DATE |
+| **Sep 1, 2026+** | Removed | ALL versions removed from NuGet - Enterprise SDK REQUIRED |
+
+### What This Means
+
+✅ **Existing Projects**: Continue to work (installed before Sep 1)  
+❌ **New Projects**: Cannot install Analytics SDK from Sep 1, 2026 onwards  
+❌ **New Installs**: IMPOSSIBLE after Aug 31, 2026 - Enterprise SDK ONLY  
+⚠️ **Security Issues**: NO patches after Aug 31, 2026  
+🔄 **Migration REQUIRED**: Must complete migration by Aug 31, 2026
+
+---
+
+## Migration Required
+
+### Why Migrate?
+
+- **Long-term Support**: Enterprise SDK is the actively maintained solution
+- **New Features**: Enterprise SDK receives regular updates and features
+- **Security**: Security patches provided for years to come
+- **Support**: Dedicated support team for enterprise deployments
+
+### How to Migrate
+
+#### Step 1: Review Current Usage
+
+```csharp
+// Identify all code using the Analytics SDK
+using FactSet.AnalyticsAPI.Engines;
+using FactSet.AnalyticsAPI.Engines.Api;
+using FactSet.AnalyticsAPI.Engines.Model;
+```
+
+#### Step 2: Update Project File
+
+```xml
+<!-- OLD: Analytics SDK (Deprecated) -->
+<PackageReference Include="FactSet.AnalyticsAPI.Engines" Version="6.1.1" />
+
+<!-- NEW: Enterprise SDK -->
+<PackageReference Include="FactSet.SDK.FactSetAnalyticsAPI" Version="1.0.0" />
+```
+
+#### Step 3: Update Imports
+
+```csharp
+// OLD: Analytics SDK
+using FactSet.AnalyticsAPI.Engines;
+using FactSet.AnalyticsAPI.Engines.Api;
+using FactSet.AnalyticsAPI.Engines.Model;
+
+// NEW: Enterprise SDK
+using FactSet.SDK.FactSetAnalyticsAPI;
+using FactSet.SDK.FactSetAnalyticsAPI.Api;
+using FactSet.SDK.FactSetAnalyticsAPI.Model;
+```
+
+#### Step 4: Update API Calls
+
+Refer to the [Migration Guide](https://github.com/factset/enterprise-sdk/tree/main/code/dotnet) for specific API changes.
+
+### Installation Methods
+
+**NuGet Package Manager:**
+```bash
+Install-Package FactSet.SDK.FactSetAnalyticsAPI -Version 1.0.0
+```
+
+**.NET CLI:**
+```bash
+dotnet add package FactSet.SDK.FactSetAnalyticsAPI --version 1.0.0
+```
+
+---
+
+## Key Dates
+
+### FINAL DATE: August 31, 2026
+**LAST DAY** for Analytics SDK support and availability
+
+### From September 1, 2026
+- ✂️ **ALL versions REMOVED from NuGet**
+- 🚫 **NO new installations possible**
+- 🚫 **NO package discovery on NuGet**
+- ⚠️ **Only Enterprise SDK available**
+- 📦 **Existing installations continue to work (cached versions)**
+
+### Migration Window
+- **Start**: Now
+- **Deadline**: August 31, 2026
+- **After Deadline**: Enterprise SDK REQUIRED for any new projects or installations
+
+---
+
+## FAQ
+
+### Q: Will my existing project break after Aug 31?
+**A**: No, existing installations will continue to work. However, you won't be able to install new versions or migrate to new machines without having a local cache.
+
+### Q: What if I don't migrate by Aug 31?
+**A**: CRITICAL - After Aug 31, you CANNOT:
+- ❌ Install Analytics SDK from NuGet (removed)
+- ❌ Add package to new projects
+- ❌ Restore on new build agents without cached version
+- ❌ Get any security patches or support
+
+**Only Option**: Migrate to Enterprise SDK immediately after Aug 31
+
+### Q: Is the Enterprise SDK a replacement?
+**A**: Yes, the Enterprise SDK is the recommended replacement. It provides:
+- Same functionality
+- Better performance
+- Active maintenance
+- Long-term support
+
+### Q: How long do I have to migrate?
+**A**: You have until **August 31, 2026** ONLY:
+- ✅ Until Aug 31: Analytics SDK available from NuGet
+- ❌ From Sep 1: ALL versions REMOVED from NuGet
+- ⚠️ No grace period - complete removal on Sep 1
+
+### Q: Do I need to change my code?
+**A**: Minor changes may be required. See [Migration Guide](https://github.com/factset/enterprise-sdk/tree/main/code/dotnet).
+
+### Q: Can I still download the old package?
+**A**: Yes, if you have it cached. After unlisting, you cannot download it from NuGet unless you explicitly specify the version.
+
+### Q: What about support?
+**A**: Limited support available until Aug 31, 2026. After that date, support team will focus on Enterprise SDK.
+
+---
+
+## Support & Resources
+
+### Migration Assistance
+- **Enterprise SDK GitHub**: https://github.com/factset/enterprise-sdk/tree/main/code/dotnet
+- **Migration Guide**: https://developer.factset.com
+- **Email Support**: analytics.api.support@factset.com
+
+### Repositories
+- **Analytics SDK (This Repo)**: https://github.com/factset/analyticsapi-engines-dotnet-sdk
+- **Enterprise SDK**: https://github.com/factset/enterprise-sdk
+- **API Documentation**: https://developer.factset.com/api-catalog
+
+---
+
+## Upgrade Path
+
+### For Current Users
+
+```
+Analytics SDK (v6.1.1)
+        ↓
+    [Migrate]
+        ↓
+Enterprise SDK (v1.0.0+)
+        ↓
+[Active Support & Updates]
+```
+
+---
+
+## Affected APIs
+
+This deprecation affects the following FactSet Analytics APIs:
+
+- **PA Engine API** - Portfolio Analysis
+- **SPAR Engine API** - Style Performance Attribution
+- **Vault API** - Portfolio Management
+
+All functionality is available in the Enterprise SDK with improved performance and support.
+
+---
+
+## Questions?
+
+If you have questions about the deprecation or migration:
+
+1. Check the [Migration Guide](https://github.com/factset/enterprise-sdk)
+2. Review [Deprecation Documentation](./DEPRECATION.md)
+3. Contact: **analytics.api.support@factset.com**
+
+---
+
+**Last Updated**: August 5, 2026  
+**Deprecation Effective Date**: August 31, 2026  
+**Status**: In Effect