Use this skill when working on the ASP.NET Core backend — adding controllers, services, repositories, validators, authorization, WebSocket endpoints, jobs, Foundatio infrastructure, configuration, or Aspire orchestration. Prefer this as the backend entrypoint for project layering, C# conventions, logging, ProblemDetails, security-sensitive config, and OpenAPI baseline updates.
Use this skill when writing or modifying C# tests — unit tests, integration tests, or test fixtures. Covers xUnit patterns, AppWebHostFactory for integration testing, FluentClient for API assertions, ProxyTimeProvider for time manipulation, and test data builders. Apply when adding new test cases, debugging test failures, or setting up test infrastructure.
Audit and implement dependency upgrades safely. Use when updating, bumping, replacing, or removing NuGet, npm, container, or other third-party dependencies, including security-driven updates. Covers release-note review, compatibility and migration analysis, security advisories, full validation, and PR evidence.
Use this skill when verifying serialization behavior across branches, testing for backwards compatibility in JSON serialization changes, or comparing API request/response/storage formats between implementations. Apply when migrating serializers (e.g., Newtonsoft to System.Text.Json), adding new JSON converters, or changing naming policies.
Use when investigating a running Exceptionless Aspire app through resource state, logs, OpenTelemetry logs/traces/spans, metrics, browser telemetry, dashboard data, or telemetry export. Based on Microsoft's official aspire-monitoring workflow skill. Do not use for ordinary code reading, narrow edits, or normal build/test work.
Systematically dogfood Exceptionless locally. Use when asked to dogfood, QA, exploratory test, bug hunt, browser-test, or validate frontend/full-stack behavior in this repo. Start from the AppHost/Aspire local URLs and choose the Svelte or legacy Angular app based on the changed surface. External Exceptionless URLs require an explicit user-provided URL and confirmation.
Use this skill when querying, counting, patching, or paginating data through Foundatio.Repositories Elasticsearch abstractions. Covers filter expressions, aggregation queries, partial and script patches, and search-after pagination. Apply when working with normal query/count/patch/pagination repository code; reserve raw IElasticClient for migrations or index maintenance that cannot be expressed through repositories.
Use this skill as the frontend entrypoint for the Svelte 5 app in ClientApp — adding routes, creating feature slices, writing Svelte components, applying TypeScript conventions, using shared UI/formatter components, handling accessibility, or adding frontend tests. The legacy Angular app still powers most of the current site in ClientApp.angular, but all new frontend development should be Svelte UI only unless the user explicitly asks for Angular or legacy UI changes.