// Implementation details for the EF Core Azure Cosmos DB provider. Use when changing Cosmos-specific code.
| name | cosmos-provider |
| description | Implementation details for the EF Core Azure Cosmos DB provider. Use when changing Cosmos-specific code. |
| user-invocable | false |
Non-relational provider with its own parallel query pipeline. Uses JSON for document materialization.
EnsureCreated()ETag for optimistic concurrencyTestEnvironment.InitializeAsync() auto-starts a Testcontainers.CosmosDb container when Test__Cosmos__DefaultConnection is not set. Set the env var to use an existing emulator instead.[CosmosCondition(CosmosCondition.IsNotLinuxEmulator)].Run ApiChief in the EF Core repo to emit baselines, summaries, deltas, review files, or breaking-change checks. Use when refreshing `*.baseline.json`, preparing API review artifacts, or validating API changes.
Create custom GitHub Copilot agents. Use when asked to create, scaffold, or configure a custom agent, declarative agent, or @-invokable chat participant for GitHub Copilot.
Create new Agent Skills for GitHub Copilot. Use when asked to create, scaffold, or add a skill. Generates SKILL.md with frontmatter, directory structure, and optional resources.
Implementation details for EF Core migrations. Use when changing MigrationsSqlGenerator, model diffing, migration operations, HistoryRepository, the Migrator or related classes.
Implementation details for EF Core LINQ query translation, SQL generation, and bulk operations (ExecuteUpdate/ExecuteDelete). Use when changing expression visitors, SqlExpressions, QuerySqlGenerator, ShaperProcessingExpressionVisitor, UpdateExpression, DeleteExpression, or related classes.
Create EF Core PRs targeting servicing release branches (release/*). Use when working on a PR that targets a release branch, backporting a fix from main, or when the user mentions servicing, patch, or release branch.