# Moai Lang Scala

> Scala 3.6+ best practices with ScalaTest 3.2, sbt 1.10, functional programming patterns, and Play Framework.

- Skill: `majiayu000/moai-lang-scala-4` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/moai-lang-scala-4`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/moai-lang-scala-4/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/moai-lang-scala-4

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# Lang Scala Skill

## Skill Metadata

| Field | Value |
| ----- | ----- |
| **Skill Name** | moai-lang-scala |
| **Version** | 2.1.0 (2025-11-02) |
| **Allowed tools** | Read (read_file), Bash (terminal) |
| **Auto-load** | On demand when keywords detected |
| **Tier** | Language |

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## What It Does

Scala 3.6+ best practices with ScalaTest 3.2, sbt 1.10, functional programming patterns, and Play Framework.

**Key capabilities**:
- ✅ Best practices enforcement for language domain
- ✅ TRUST 5 principles integration
- ✅ Latest tool versions (2025-11-02)
- ✅ TDD workflow support
- ✅ Play Framework web application patterns

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## When to Use

**Automatic triggers**:
- Related code discussions and file patterns
- SPEC implementation (`/alfred:2-run`)
- Code review requests

**Manual invocation**:
- Review code for TRUST 5 compliance
- Design new features
- Troubleshoot issues

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## Tool Version Matrix (2025-11-02)

| Tool | Version | Purpose | Status |
|------|---------|---------|--------|
| **Scala** | 3.6.0 | Runtime | ✅ Current |
| **ScalaTest** | 3.2.19 | Testing | ✅ Current |
| **sbt** | 1.10.0 | Build tool | ✅ Current |
| **Play Framework** | 3.0.9 | Web framework | ✅ Current |

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## Inputs

- Language-specific source directories
- Configuration files
- Test suites and sample data

## Outputs

- Test/lint execution plan
- TRUST 5 review checkpoints
- Migration guidance

## Failure Modes

- When required tools are not installed
- When dependencies are missing
- When test coverage falls below 85%

## Dependencies

- Access to project files via Read/Bash tools
- Integration with `moai-foundation-langs` for language detection
- Integration with `moai-foundation-trust` for quality gates

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## References (Latest Documentation)

_Documentation links updated 2025-10-22_

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## Changelog

- **v2.0.0** (2025-10-22): Major update with latest tool versions, comprehensive best practices, TRUST 5 integration
- **v1.0.0** (2025-03-29): Initial Skill release

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## Works Well With

- `moai-foundation-trust` (quality gates)
- `moai-alfred-code-reviewer` (code review)
- `moai-essentials-debug` (debugging support)

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## Best Practices

✅ **DO**:
- Follow language best practices
- Use latest stable tool versions
- Maintain test coverage ≥85%
- Document all public APIs

❌ **DON'T**:
- Skip quality gates
- Use deprecated tools
- Ignore security warnings
- Mix testing frameworks