Set up project for AI assistance.

.github/copilot-instructions.md

@@ -0,0 +1,25 @@
+# AI Instructions
+
+## Project Context
+
+MySqlConnector is a high-performance ADO.NET Data Provider for MySQL.
+It implements the MySQL protocol and handles authentication, connection pooling, and data access.
+
+## Key Conventions
+
+### Code Style
+- follow Microsoft's C# coding conventions with the exception that field names are prefixed with `m_` and are specified at the end of the class definition
+- use C# nullable reference types and implicit usings
+- XML documentation required for public APIs
+- use tabs for indentation in *.cs files; use two spaces for indentation in XML and JSON files, including *.csproj files
+- follow the rules from `.editorconfig`
+- implement async methods using the IOBehavior pattern: sync and async methods delegate to a common implementation that takes an IOBehavior parameter and handles both I/O types
+
+### Performance
+- minimize allocations in hot paths
+- use Span-based APIs wherever possible
+
+### Testing
+- Test files should be located in corresponding test directories. Place unit tests in tests/MySqlConnector.Tests. Place integration tests in tests/IntegrationTests.
+- Test names should be descriptive and follow the pattern `CamelCaseShortDescription`.
+- Use xUnit for tests.

.gitignore

@@ -11,6 +11,7 @@ project.lock.json
 _ReSharper.*
 TestResult.xml
 Thumbs.db
+.aider*
 *.csproj.user
 *.DotSettings.user
 .idea