Backend

ZapSign electronic signature API via curl. Use this skill to create documents for signature, manage signers, and track signing status.

Go backend development assistant for building production-ready services with modern 2025 best practices. Supports project initialization, framework selection (Gin/Chi/Echo/Fiber), database layer (pgx/sqlc/GORM), and API development. Activated when users mention "Go", "Golang", "고랭", "백엔드", or need Go service development help.

Use percentage-based capital limits, not hard-coded dollar amounts. Trigger when: (1) trades blocked on small accounts, (2) min_cash_buffer is absolute dollars, (3) capital allocation doesn't scale with account size, (4) fixed dollar thresholds in risk code.

Comprehensive Bun runtime expertise covering all major features.Use when working with Bun projects, migrating from Node.js, or leveraging Bun-specific APIs.Activates for: Bun.serve, Bun.file, bun:test, bun:sqlite, bun install, bun build,bunfig.toml, TypeScript in Bun, package manager operations, bundler configuration,and Node.js compatibility questions.

Development guidelines for Quantum Skincare's Python FastAPI image processor microservice. Covers FastAPI patterns, Perfect Corp API integration, MediaPipe FaceMesh validation, correlation headers, access control (CIDR + X-Internal-Secret), error handling, Pydantic models, structured logging, mock mode, provider normalization, and testing strategies. Use when working with image-processor code, routes, validation pipeline, Perfect Corp integration, or Python/FastAPI patterns.

SQL expert for Rice Data Portal queries using DuckDB SQL. ALWAYS use this skill when data is requested from the Rice stock market database (tickers, prices, fundamentals, insider trades, valuation metrics, etc.). When users request monthly/weekly returns OR momentum, this skill automatically calculates BOTH metrics from end-of-month or end-of-week prices. Returns are expressed as decimals (not percentages). This ensures proper SQL generation, filename prompting, and multi-format file saving. Do NOT use this skill for analyzing local CSV/Parquet files that are already saved.

Master backend development, API design, server architecture, database integration, authentication, microservices, and production patterns. Includes Node.js, GraphQL, Spring Boot, ASP.NET Core, and PHP frameworks.

Updates project documentation in markdown files when requested. Use when the user asks to update, modify, or create project documentation such as README files, API docs, architecture docs, or other markdown documentation files.

Detect N+1 query patterns in the codebase. Finds loops that contain database or API calls that should be batched. Works across all languages. Use when user asks to find performance issues or N+1 patterns.

[Extends backend-developer] Python FastAPI specialist. Use for FastAPI apps, async endpoints, Pydantic v2, SQLAlchemy async, dependency injection. Invoke alongside backend-developer for Python API projects.

This skill should be used when developing backend services for Manjha using Encore.ts, implementing agents, writing E2E tests, or working with the message-driven architecture. It ensures adherence to TDD practices, type safety, proper logging, and Manjha's development principles.

Add SQLite database to Flask or Sinatra app with beginner-friendly code examples and teaching comments

Stop local Flask server running on port 8080. Kills process cleanly using lsof or PID file. Use when stopping local Python development server.

Create or modify API endpoints in IdeaForge backend. Triggers: new route, controller, service, repository, CRUD operation, Zod validation, API debugging. Pattern: Routes → Controller → Service → Repository.

This skill provides project-specific coding conventions, architectural principles, repository structure standards, testing patterns, and contribution guidelines for the better-chatbot project (https://github.com/cgoinglove/better-chatbot). Use this skill when contributing to or working with better-chatbot to understand the design philosophy and ensure code follows established patterns.Includes: API architecture deep-dive, three-tier tool system (MCP/Workflow/Default), component design patterns, database repository patterns, architectural principles (progressive enhancement, defensive programming, streaming-first), practical templates for adding features (tools, routes, repositories).Use when: working in better-chatbot repository, contributing features/fixes, understanding architectural decisions, following server action validators, implementing tools/workflows, setting up Playwright tests, adding API routes, designing database queries, building UI components, handling multi-AI provider integrationKeywor

Use this skill whenever the user wants to deploy, configure, or refine deployment of a Hono/TypeScript backend (or similar Worker) to Cloudflare Workers/Pages using Wrangler, including wrangler.toml, environments, bindings, and basic release workflows.

Analyze and reduce cognitive load in code by identifying complex conditionals, deep nesting, shallow modules, excessive abstractions, and architectural over-engineering. Use when reviewing code quality, refactoring for maintainability, or simplifying systems. Keywords: cognitive load, complexity, refactor, simplify, maintainability, readability, mental overhead, abstraction, architecture review

TheGraph subgraph development with AssemblyScript handlers, schema definitions, and Matchstick testing. Triggers on subgraph, thegraph, graphql, mapping.ts.

Dapr (Distributed Application Runtime) integration patterns for microservices. Covers Pub/Sub, State Store, Jobs API, Secrets Management, and Service Invocation with HTTP APIs. Full Dapr implementation with all 5 building blocks. Use this Skill whenever you need to integrate Dapr building blocks into your microservices, publish/subscribe to events, manage state, schedule jobs, access secrets, or invoke services via Dapr.

Create and harden systemd service unit files following modern best practices. Use when writing new systemd units for web applications, background workers, or daemons, or when hardening existing services with security sandboxing and isolation features. Covers service types, dependencies, restart policies, security options, and filesystem restrictions.