efcore

Route gh-aw design, creation, diagnosis, patching, active debugging, and upgrade requests to the right strategies.

Implementation details for EF Core change tracking. Use when changing InternalEntityEntry, ChangeDetector, SnapshotFactoryFactory, or related entity state, snapshot, or property accessor code.

Review EF Core pull requests or local changes for concrete correctness, compatibility, performance, security, and test-coverage problems. Use when asked to review, critique, or check code changes before merge or submission.

Implementation details for the EF Core Azure Cosmos DB provider. Use when changing Cosmos-specific code.

Create, review, or fix custom GitHub Copilot agents. Use when asked to create, scaffold, configure, review, or restrict a custom agent, declarative agent, or @-invokable chat participant for GitHub Copilot.

Create or modify GitHub Actions workflows for CI, automation, or PR management. Use when asked to create, scaffold, add, extend, or fix a workflow (.yml file under .github/workflows/), including existing pull-request policy and comment automation.

Create and evaluate VS Code file-based instructions (.instructions.md files). Use when asked to create, scaffold, or add file-based instructions for Copilot. Generates scoped instructions and a paired Vally harness eval.

Create, review, or fix Agent Skills for GitHub Copilot. Use when asked to create, scaffold, improve, or repair a SKILL.md and its paired harness evaluation.

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 model building. Use when changing ConventionSet, ModelBuilder, IConvention implementations, ModelRuntimeInitializer, RuntimeModel, or related classes.

Implement and review EF Core query translation, projection visitors, split-query enumeration, and query regression tests. Use when changing query-pipeline code or choosing specification and provider coverage for a query regression.

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.

Implementation details for EF Core scaffolding (reverse engineering). Use when changing ef dbcontext scaffold pipeline implementation, database schema reading, CSharpModelGenerator, 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.

Implementation details for the Microsoft.Data.Sqlite ADO.NET provider. Use when changing files under `src/Microsoft.Data.Sqlite.Core/`.

Implementation details for the EF Core dotnet-ef CLI and tooling. Use when changing dotnet-ef commands, the ef wrapper, EFCore.Tools (PMC), or EFCore.Tasks MSBuild integration.

Triage an EF Core issue with a safety scan, classification, area labels, minimal reproduction, regression verification, and duplicate search. Use for bug reports, feature requests, or issue assessments. Supports sandbox triage that writes only a local Markdown report without requiring GitHub write permissions.

Implementation details for EF Core SaveChanges and the update pipeline. Use when changing CommandBatchPreparer, UpdateSqlGenerator, ModificationCommand, or related classes.