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Harness
Put raw intelligence to work.
Skills, MCP servers, prompts, assistants and connectors. Every listing shows its author, version and the permissions it needs.
On the shelves21,000
- MCP servers18,849
- Skills1,282
- Assistants651
- Prompts218
0 items
BackendSpecialist assistants, also called subagents. Installed in Claude Code, Codex and the like, they take on the work their main session hands them.
- Java prowshobson· jvm-languages 40kMaster Java 21+ with modern features like virtual threads, pattern matching, and Spring Boot 3.x. Expert in the latest Java ecosystem including GraalVM, Project Loom, and cloud-native patterns.OpusBackendArchitecture
- FastAPI revieweraffaan-m 275kReviews FastAPI applications for async correctness, dependency injection, Pydantic schemas, security, OpenAPI quality, testing, and production readiness.SonnetSecurityTestingBackend
- Java Build Error Resolveraffaan-m 275kJava/Maven/Gradle build, compilation, and dependency error resolution specialist. Automatically detects Spring Boot or Quarkus and applies framework-specific fixes. Fixes build errors, Java compiler errors, and Maven/Gradle issues with minimal changes. Use when Java builds fail.SonnetBackend
- Django Build Error Resolveraffaan-m 275kDjango/Python build, migration, and dependency error resolution specialist. Fixes pip/Poetry errors, migration conflicts, import errors, Django configuration issues, and collectstatic failures with minimal changes. Use when Django setup or startup fails.SonnetBackend
- Java revieweraffaan-m 275kExpert Java code reviewer for Spring Boot and Quarkus projects. Automatically detects the framework and applies the appropriate review rules. Covers layered architecture, JPA/Panache, MongoDB, security, and concurrency.SonnetDatabasesSecurityBackend
- Web GIS Developermsitarzewski 158kFull-stack web GIS engineer who builds interactive mapping applications — MapLibre GL JS, ArcGIS JS API, Leaflet, real-time dashboards, REST API integration, and geospatial web services.Backend
- GraphQL architectwshobson· api-scaffolding 40kMaster modern GraphQL with federation, performance optimization, and enterprise security. Build scalable schemas, implement advanced caching, and design real-time systems.OpusSecurityBackendArchitecture
- Senior engineeralirezarezvani 28kSenior Engineer agent for architecture decisions, code review, DevOps, and API design. Orchestrates engineering and engineering-team skills for technical implementation work. Spawn when users need system design, code quality review, CI/CD pipeline setup, or infrastructure decisions.Sonnet1 skillDevOpsBackendArchitecture
- Backend Architectmsitarzewski 158kSenior backend architect specializing in scalable system design, database architecture, API development, and cloud infrastructure. Builds robust, secure, performant server-side applications and microservicesDatabasesBackendArchitecture
- Product Orchestratorwshobson· ship-mate 40kProduct Orchestrator agent. Reads the active story file, asks clarifying product questions one at a time, confirms task type (FRONTEND/BACKEND), and produces a complete unambiguous spec in orchestrator-output.md.SonnetBackendFrontend
- Python prowshobson· python-development 40kMaster Python 3.12+ with modern features, async programming, performance optimization, and production-ready practices. Expert in the latest Python ecosystem including uv, ruff, pydantic, and FastAPI.OpusBackendCoding
- Backend development test automatorwshobson· backend-development 40kCreate comprehensive test suites including unit, integration, and E2E tests. Supports TDD/BDD workflows. Use for test creation during feature development.SonnetTestingBackend
- FastAPI prowshobson· api-scaffolding 40kBuild high-performance async APIs with FastAPI, SQLAlchemy 2.0, and Pydantic V2. Master microservices, WebSockets, and modern Python async patterns.OpusBackendArchitecture
- .NET architectwshobson· dotnet-contribution 40kExpert .NET backend architect specializing in C#, ASP.NET Core, Entity Framework, Dapper, and enterprise application patterns. Masters async/await, dependency injection, caching strategies, and performance optimization.SonnetBackendCodingArchitecture
- Backend development security auditorwshobson· backend-development 40kReview code and architecture for security vulnerabilities, OWASP Top 10, auth flaws, and compliance issues. Use for security review during feature development.SonnetSecurityBackendLegal
- Backend development performance engineerwshobson· backend-development 40kProfile and optimize application performance including response times, memory usage, query efficiency, and scalability. Use for performance review during feature development.SonnetMemoryBackend
- Backend security coderwshobson· backend-api-security 40kExpert in secure backend coding practices specializing in input validation, authentication, and API security.SonnetSecurityBackend
- Engineering leadalirezarezvani 28kEngineering Team Lead agent for coordinating QA, security, data engineering, ML, and frontend/backend teams. Orchestrates engineering-team skills for team-level technical decisions. Spawn when users need team coordination, tech stack evaluation, incident response, or cross-functional engineering work.Opus1 skillSecurityTestingBackend
- Version delta analystanthropics· code-modernization 38kIdentifies the breaking changes between two versions of the SAME stack (e.g. .NET Framework 4.8 → .NET 8, Java 8 → 17/21, Spring Boot 2 → 3) that actually bite a given codebase, and drives the ecosystem's migration tooling. Use for same-stack uplifts, where code is preserved and tweaked — not rewritten from intent. (Note — some "same-stack" bumps are really rewrites — Python 2 → 3 with pervasive str/bytes, AngularJS → Angular — where minimal-diff fails; flag those for /code-modernization:modernize-transform.)BackendFrontend
- Django prowshobson· api-scaffolding 40kMaster Django 5.x with async views, DRF, Celery, and Django Channels. Build scalable web applications with proper architecture, testing, and deployment.OpusDevOpsTestingBackend
- Backend architectwshobson· api-scaffolding 40kExpert backend architect specializing in scalable API design, microservices architecture, and distributed systems. Masters REST/GraphQL/gRPC APIs, event-driven architectures, service mesh patterns, and modern backend frameworks. Handles service boundary definition, inter-service communication, resilience patterns, and observability.Same as sessionMonitoringBackendArchitecture
- Django revieweraffaan-m 275kExpert Django code reviewer specializing in ORM correctness, DRF patterns, migration safety, security misconfigurations, and production-grade Django practices. Use for all Django code changes.SonnetSecurityBackend
- Backend engineeralirezarezvani 28kBackend-engineering orchestrator. Walks the 7 Matt Pocock forcing questions (read/write ratio + QPS, tenancy, sync vs async, data sensitivity, pattern, RPO/RTO, SLO), picks the language + pattern profile, forks into specialists (api-design-reviewer, database-designer, migration-architect, observability-designer, slo-architect — listed alphabetically; workflow order is dependency-driven) rather than reimplementing their scope. Forks own context. Invoke via /cs:backend-review or Agent({subagent_type:"cs-backend-engineer",...}).1 skillDatabasesMonitoringBackend
- Ruby prowshobson· web-scripting 40kWrite idiomatic Ruby code with metaprogramming, Rails patterns, and performance optimization. Specializes in Ruby on Rails, gem development, and testing frameworks.Same as sessionTestingBackendCoding