Jeffallan

Design REST or GraphQL APIs by defining data relationships, requests, responses, and authentication. Produce OpenAPI specifications, machine-readable API descriptions, with consistent errors, pagination, and versioning plans, then validate contracts using a mock server.

中文简介正在准备中。当前显示英语简介。

• Designing a new API from business requirements
• Creating and validating OpenAPI specifications
• Standardizing errors and paginated responses

Create Kubernetes deployment files and Helm charts, reusable application packages. Configure permissions, network isolation, and persistent storage, then investigate pod failures and resource usage to adjust workloads and verify deployment health.

中文简介正在准备中。当前显示英语简介。

• Create deployment YAML and Helm charts
• Configure access permissions and network isolation
• Set up persistent storage and sensitive configuration

Investigate slow PostgreSQL and MySQL queries using execution plans, which show how the database runs a query. Develop index, SQL, and configuration changes, then compare measurements before and after each change to validate the results.

中文简介正在准备中。当前显示英语简介。

• Investigating slow SQL queries
• Reviewing database index design
• Tuning memory and database configuration

Build Go services and command-line tools with clear interfaces, explicit error handling, and concurrent tasks using goroutines and channels. Use pprof to investigate performance, then check behavior with benchmarks, structured test cases, fuzzing, and race detection.

中文简介正在准备中。当前显示英语简介。

• Implementing concurrent tasks with cancellation and error handling
• Building gRPC or REST services and command-line tools
• Investigating Go performance with pprof and benchmarks

Build, debug, and refactor JavaScript applications for browsers and Node.js. Covers asynchronous tasks with async/await, module organization, performance checks, and test creation, with explicit error handling and modern ES2023+ syntax.

中文简介正在准备中。当前显示英语简介。

• Build a vanilla JavaScript application
• Fix errors in asynchronous API requests
• Organize code into ESM modules

Build and debug mobile apps for iOS and Android with React Native and Expo. Implement navigation, adapt screens to each platform, integrate native modules that access platform features, and improve list rendering, keyboard behavior, and memory use.

中文简介正在准备中。当前显示英语简介。

• Building an app for both iOS and Android
• Adding tabs, navigation stacks, and deep links
• Improving scrolling performance in long lists

Develop microcontroller firmware for STM32 or ESP32, including peripheral drivers and FreeRTOS tasks. The skill guides interrupt handling, memory and power optimization, and checks that time-sensitive operations meet their deadlines.

中文简介正在准备中。当前显示英语简介。

• Implementing peripheral control on STM32 or ESP32
• Designing periodic tasks and synchronization with FreeRTOS
• Reducing firmware memory use and power consumption

Connect AI agents to Jira and Confluence through MCP, a protocol for accessing external tools. This skill guides issue searches and updates, page management, sprint workflows, authentication setup, and troubleshooting of Atlassian integrations.

中文简介正在准备中。当前显示英语简介。

• Find Jira issues by assignee or status
• Search and update Confluence pages
• Turn meeting notes into Jira ticket updates

Build NestJS APIs with TypeScript code for modules, request handlers, services, authentication, input validation, and database access. The skill also prepares Swagger API documentation and unit and end-to-end tests for the implemented features.

中文简介正在准备中。当前显示英语简介。

• Building a NestJS REST API
• Adding JWT and Passport authentication
• Connecting TypeORM or Prisma

Design and improve prompts for language models, then test their accuracy and consistency. Create reusable templates, JSON output schemas that define response structure, evaluation criteria, and test cases while considering token use and model differences.

中文简介正在准备中。当前显示英语简介。

• Designing prompts for a new AI application
• Improving inconsistent model responses
• Defining JSON response formats

Design and implement command-line tools with subcommands, options, interactive prompts, and progress indicators. Get command structures, configuration handling, clear error messages, and shell completion scripts, with guidance for automated use and testing across operating systems.

中文简介正在准备中。当前显示英语简介。

• Build a command-line tool with subcommands and options
• Add interactive prompts and progress indicators
• Provide bash, zsh, and fish command completion

Build Laravel applications with authenticated APIs, interactive interfaces, and background jobs. The skill guides database relationships, query optimization, and feature tests, using tools such as Sanctum for authentication and Livewire for interfaces.

中文简介正在准备中。当前显示英语简介。

• Build an authenticated Laravel API
• Optimize database queries and relationships
• Set up background jobs with Horizon

Analyze and tune PostgreSQL databases using query execution plans, which show how queries run. This skill guides index design, JSONB searches, replication setup, maintenance, and monitoring, with checks to compare behavior before and after changes.

中文简介正在准备中。当前显示英语简介。

• Investigate slow queries with EXPLAIN
• Design indexes for JSONB searches
• Configure replication and monitor lag

Build .NET 8 APIs and backend services using C# 12, with clear separation of application responsibilities. The skill covers database access, authentication, API documentation, compilation checks, and integration tests that verify components working together.

中文简介正在准备中。当前显示英语简介。

• Building endpoints with minimal APIs
• Adding database access with Entity Framework Core
• Separating application responsibilities with MediatR

Build MCP servers and clients that connect AI systems to external tools and data. The skill defines validated inputs, implements tool and resource handlers, configures communication methods, and checks protocol behavior with the MCP Inspector.

中文简介正在准备中。当前显示英语简介。

• Expose external tools and data to AI systems through MCP
• Start an MCP project in TypeScript or Python
• Validate inputs and investigate protocol errors

Design systems made of independently deployable services, or plan how to split an existing application. The skill produces service boundary diagrams and recommendations for communication, data ownership, failure handling, monitoring, and deployment.

中文简介正在准备中。当前显示英语简介。

• Planning how to split a monolithic application
• Choosing REST, gRPC, or event-based communication
• Defining data ownership and cross-service consistency

Create Playwright tests that check user journeys in a browser. The skill organizes reusable page interactions, configures test environments, investigates intermittent failures using execution traces, and supports API mocking, visual comparisons, and automated pipeline integration.

中文简介正在准备中。当前显示英语简介。

• Test login and other browser user journeys
• Investigate tests that fail intermittently
• Replace API responses with controlled test data

Configure Django file storage on AWS S3 using django-storages and boto3. Separate public and private files, create temporary download or upload links, configure CloudFront delivery, and test storage behavior without accessing real S3 buckets.

中文简介正在准备中。当前显示英语简介。

• Moving Django static files and uploads to S3
• Separating public files from private documents
• Creating temporary download and direct upload links

Build machine learning workflows that connect data checks, training, evaluation, and deployment. The skill implements experiment tracking, model version management, and automated retraining, with reproducible environments and explicit validation thresholds before models enter production.

中文简介正在准备中。当前显示英语简介。

• Automate model training and retraining workflows
• Record and compare machine learning experiments
• Build a feature store for model input data

Use when brainstorming ideas, generating raw material, or starting the creative phase of a writing project. Invoke for topic exploration, idea generation, angle discovery, or producing abundant raw content before organizing.

中文简介正在准备中。当前显示原文说明。

Use when organizing raw material into a coherent structure, defining the throughline of a piece, building an outline, or making strategic decisions about what to include and cut from generated content.

中文简介正在准备中。当前显示原文说明。

Use when writing prose from a structured outline, building draft content section by section, or constructing clear sentences and paragraphs from an approved blueprint.

中文简介正在准备中。当前显示原文说明。

Use when scoring finished content against quality dimensions, evaluating whether a piece meets publishable standards, or determining which workflow phase needs rework based on quality gaps.

中文简介正在准备中。当前显示原文说明。

Use when ingesting source material for a writing project, building a knowledge map from notes and documents, identifying research gaps, or preparing a research corpus for content creation.

中文简介正在准备中。当前显示原文说明。