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Scala 3.4+ 开发专家：函数式编程、Akka、Cats Effect、ZIO、Spark 大数据处理

moai-lang-scala by modu-ai/moai-adk

57 周安装量

888 GitHub Stars

GitHub

安装命令

npx skills add https://github.com/modu-ai/moai-adk --skill moai-lang-scala

函数式编程开发数据处理

🇨🇳中文介绍

Scala 3.4+ 开发专家

适用于 JVM 应用程序的函数式编程、效应系统和大数据处理。

快速参考

自动触发：Scala 文件 (.scala, .sc)，构建文件 (build.sbt, project/build.properties)

核心能力：

Scala 3.4：Given/using、扩展方法、枚举、不透明类型、匹配类型
Akka 2.9：类型化 Actor、流、集群、持久化
Cats Effect 3.5：纯函数式编程运行时、纤程、并发结构
ZIO 2.1：效应系统、层、流式处理、错误处理
Apache Spark 3.5：DataFrame API、SQL、结构化流处理

关键生态系统库：

HTTP：Http4s 0.24, Tapir 1.10
JSON：Circe 0.15, ZIO JSON 0.6
数据库：Doobie 1.0, Slick 3.5, Quill 4.8
流处理：FS2 3.10, ZIO Streams 2.1
测试：ScalaTest, Specs2, MUnit, Weaver

模块索引

此技能采用渐进式披露，包含专业模块：

核心语言

functional-programming.md - Scala 3.4 特性：Given/Using、类型类、枚举、不透明类型、扩展方法

效应系统

cats-effect.md - Cats Effect 3.5：IO 单子、资源、纤程、FS2 流处理
zio-patterns.md - ZIO 2.1：效应、层、ZIO 流、错误处理

框架

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项目设置 (SBT 1.10)

在 build.sbt 中，将 ThisBuild / scalaVersion 设置为 "3.4.2" 并设置 organization。定义 lazy val root 项目，其设置包括 name 和 libraryDependencies。添加 cats-effect、zio、akka-actor-typed、http4s-ember-server、circe-generic 和用于测试范围的 scalatest 的依赖项。包含用于弃用、功能警告和 Xfatal-warnings 的 scalacOptions。

扩展方法：使用带括号参数的 extension 关键字。定义诸如按空白字符分割单词以及截断前检查长度、取字符并附加省略号等方法。

Given 和 Using：定义具有抽象方法签名的 trait。使用 with 关键字创建 given 实例并实现该方法。创建带有 using 参数子句的函数以进行隐式解析。

枚举类型：定义带有泛型类型参数和正变体注解的 enum。创建带参数的 case 条目。使用 match 表达式在 enum 上定义方法以处理每种情况，返回适当的结果。

最新文档的库映射：

/scala/scala3 - Scala 3.4 语言参考
/scala/scala-library - 标准库

/typelevel/cats-effect - Cats Effect 3.5 文档
/typelevel/cats - Cats 2.10 函数式抽象
/zio/zio - ZIO 2.1 文档
/zio/zio-streams - ZIO Streams 2.1

Akka 生态系统：

/akka/akka - Akka 2.9 类型化 Actor 和流
/akka/akka-http - Akka HTTP REST API
/akka/alpakka - Akka 连接器

/http4s/http4s - 函数式 HTTP 服务器/客户端
/softwaremill/tapir - API 优先设计

/apache/spark - Spark 3.5 DataFrame 和 SQL
/apache/flink - Flink 1.19 流处理
/apache/kafka - Kafka 客户端 3.7

ScalaTest：使用 Matchers 扩展 AnyFlatSpec。使用带 should 的字符串描述来定义行为。使用 shouldBe 进行相等性检查断言。

MUnit with Cats Effect：扩展 CatsEffectSuite。使用字符串名称定义测试。返回包含 assertEquals 断言的 IO。

ZIO Test：扩展 ZIOSpecDefault。将规范定义为包含测试条目的套件。使用 for 推导式来运行效应并产生 assertTrue 断言。

隐式解析：使用 scalac -explain 获取详细的错误信息
类型推断：当推断失败时添加显式类型注解
SBT 编译缓慢：在 build.sbt 中启用 Global / concurrentRestrictions

效应系统问题：

Cats Effect：检查是否缺少 import cats.effect._ 或 import cats.syntax.all._
ZIO：使用 ZIO.serviceWith 和 ZIO.serviceWithZIO 验证层组合
Akka：审查 Actor 层次结构和监督策略

moai-lang-java - JVM 互操作性，Spring Boot 集成
moai-domain-backend - REST API、GraphQL、微服务模式
moai-domain-database - Doobie、Slick、数据库模式
moai-workflow-testing - ScalaTest、MUnit、基于属性的测试

全面的参考资料：

reference.md - 完整的 Scala 3.4 覆盖范围、Context7 映射、性能
examples.md - 生产就绪代码：Http4s、Akka、Spark 模式

最后更新：2026-01-11 状态：生产就绪 (v2.1.0)

🇺🇸English

Scala 3.4+ Development Specialist

Functional programming, effect systems, and big data processing for JVM applications.

Quick Reference

Auto-Triggers: Scala files (.scala, .sc), build files (build.sbt, project/build.properties)

Core Capabilities:

Scala 3.4: Given/using, extension methods, enums, opaque types, match types
Akka 2.9: Typed actors, streams, clustering, persistence
Cats Effect 3.5: Pure FP runtime, fibers, concurrent structures
ZIO 2.1: Effect system, layers, streaming, error handling
Apache Spark 3.5: DataFrame API, SQL, structured streaming

Key Ecosystem Libraries:

HTTP: Http4s 0.24, Tapir 1.10
JSON: Circe 0.15, ZIO JSON 0.6
Database: Doobie 1.0, Slick 3.5, Quill 4.8
Streaming: FS2 3.10, ZIO Streams 2.1
Testing: ScalaTest, Specs2, MUnit, Weaver

Module Index

This skill uses progressive disclosure with specialized modules:

Core Language

functional-programming.md - Scala 3.4 features: Given/Using, Type Classes, Enums, Opaque Types, Extension Methods

Effect Systems

cats-effect.md - Cats Effect 3.5: IO monad, Resources, Fibers, FS2 Streaming
zio-patterns.md - ZIO 2.1: Effects, Layers, ZIO Streams, Error handling

Frameworks

akka-actors.md - Akka Typed Actors 2.9: Actors, Streams, Clustering patterns
spark-data.md - Apache Spark 3.5: DataFrame API, SQL, Structured Streaming

Implementation Guide

Project Setup (SBT 1.10)

In build.sbt, set ThisBuild / scalaVersion to "3.4.2" and organization. Define lazy val root project with settings including name and libraryDependencies. Add dependencies for cats-effect, zio, akka-actor-typed, http4s-ember-server, circe-generic, and scalatest for test scope. Include scalacOptions for deprecation, feature warnings, and Xfatal-warnings.

Quick Examples

Extension Methods: Use extension keyword with parameter in parentheses. Define methods like words splitting on whitespace and truncate checking length before taking characters and appending ellipsis.

Given and Using: Define trait with abstract method signature. Create given instance with with keyword and implement the method. Create functions with using parameter clause for implicit resolution.

Enum Types: Define enum with generic type parameters and plus variance annotations. Create case entries with parameters. Define methods on enum using match expression to handle each case, returning appropriate results.

Context7 Integration

Library mappings for latest documentation:

Core Scala:

/scala/scala3 - Scala 3.4 language reference
/scala/scala-library - Standard library

Effect Systems:

/typelevel/cats-effect - Cats Effect 3.5 documentation
/typelevel/cats - Cats 2.10 functional abstractions
/zio/zio - ZIO 2.1 documentation
/zio/zio-streams - ZIO Streams 2.1

Akka Ecosystem:

/akka/akka - Akka 2.9 typed actors and streams
/akka/akka-http - Akka HTTP REST APIs
/akka/alpakka - Akka connectors

HTTP and Web:

/http4s/http4s - Functional HTTP server/client
/softwaremill/tapir - API-first design

Big Data:

/apache/spark - Spark 3.5 DataFrame and SQL
/apache/flink - Flink 1.19 streaming
/apache/kafka - Kafka clients 3.7

Testing Quick Reference

ScalaTest: Extend AnyFlatSpec with Matchers. Use string description with should in for behavior. Make assertions with shouldBe for equality checks.

MUnit with Cats Effect: Extend CatsEffectSuite. Define test with string name. Return IO containing assertEquals assertions.

ZIO Test: Extend ZIOSpecDefault. Define spec as suite with test entries. Use for-comprehension to run effects and yield assertTrue assertions.

Troubleshooting

Common Issues:

Implicit resolution: Use scalac -explain for detailed error messages
Type inference: Add explicit type annotations when inference fails
SBT slow compilation: Enable Global / concurrentRestrictions in build.sbt

Effect System Issues:

Cats Effect: Check for missing import cats.effect._ or import cats.syntax.all._
ZIO: Verify layer composition with ZIO.serviceWith and ZIO.serviceWithZIO
Akka: Review actor hierarchy and supervision strategies

Works Well With

moai-lang-java - JVM interoperability, Spring Boot integration
moai-domain-backend - REST API, GraphQL, microservices patterns
moai-domain-database - Doobie, Slick, database patterns
moai-workflow-testing - ScalaTest, MUnit, property-based testing

Additional Resources

For comprehensive reference materials:

reference.md - Complete Scala 3.4 coverage, Context7 mappings, performance
examples.md - Production-ready code: Http4s, Akka, Spark patterns

Last Updated: 2026-01-11 Status: Production Ready (v2.1.0)

Weekly Installs

Repository

modu-ai/moai-adk

GitHub Stars

888

First Seen

Jan 22, 2026

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