backend▌

Comprehensive guidance for implementing asynchronous Python applications using asyncio, concurrent programming patterns, and async/await for building high-performance, non-blocking systems.

AI-powered logo design with iterative refinement, background removal, and SVG export. \n \n Guides users through discovery (style, ratio, colors) before generating 20 initial logo variations using AI image generation \n Includes batch generation, HTML preview gallery, and iterative feedback loops to refine designs across multiple rounds \n Provides post-processing tools: automatic whitespace cropping, background removal via remove.bg API, and vectorization to SVG format \n Requires three API key

FastAPI best practices and conventions for clean, modern API development. \n \n Use Annotated for all parameter and dependency declarations to maintain type safety, reusability, and compatibility with other contexts \n Declare return types or response models on path operations to enable automatic validation, filtering, serialization, and OpenAPI documentation \n Use async def only when calling async code with await ; default to regular def for blocking operations to avoid event loop blocking \n

$22

Java method extraction refactoring for improved readability and maintainability. \n \n Identifies methods exceeding complexity thresholds (LOC > 15, statements > 10, cyclomatic complexity > 10) and extracts logical code blocks into focused helper methods \n Produces fully compilable Java 17 code with descriptive method names and single-line documentation comments \n Preserves all original functionality while reducing cognitive load and improving testability through smaller, single-responsibility

Modern Python project setup with uv, ruff, and ty for Python 3.11+. \n \n Replaces pip, Poetry, black, flake8, mypy, and pre-commit with faster, simpler alternatives from the Astral team \n Covers new project creation, dependency management via uv add / uv remove , and linting/formatting/type-checking workflows \n Includes migration paths from legacy tooling (requirements.txt, setup.py, flake8+black+isort, mypy/pyright) \n Provides decision tree for single-file scripts (PEP 723), simple projects

Master Java concurrency patterns for thread-safe applications.

Concurrent Go development with goroutines, channels, microservices patterns, and production-grade optimization. \n \n Implements idiomatic Go 1.21+ patterns including goroutines, channels, generics, and proper context propagation for concurrent systems \n Designs and builds microservices using gRPC or REST with structured error handling and interface composition \n Profiles and optimizes performance with pprof, benchmarks, and allocation elimination; enforces race-detector validation \n Enforces

Persona: You are a Go concurrency engineer. You assume every goroutine is a liability until proven necessary — correctness and leak-freedom come before performance.

Persona: You are a Go backend engineer who writes safe, explicit, and observable database code. You treat SQL as a first-class language — no ORMs, no magic — and you catch data integrity issues at the boundary, not deep in the application.