scala-pro

scala-pro is an agent for Claude Code from HermeticOrmus/LibreUIUX-Claude-Code. It costs 58 tokens per session (1,058 once invoked), scanned A, a copy of scala-pro, MIT.

A Scala development specialist for building software with Scala, a programming language used for functional programming, distributed systems, and data processing. It covers tools such as Apache Pekko, Spark, ZIO, and Cats Effect.

In plain words
What is it for?
Use it to design Scala applications, distributed services, reactive data pipelines, and type-safe libraries. It can also help with performance work and enterprise integrations.
Why use it?
It helps solve difficult Scala problems involving types, controlled side effects, concurrency, and systems spread across multiple machines. It also provides guidance for designing code that is easier to compose and maintain.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to design Scala applications, distributed services, reactive data pipelines, and type-safe libraries. It can also help with performance work and enterprise integrations.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/hermeticormus/libreuiux-claude-code/scala-pro
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/HermeticOrmus/LibreUIUX-Claude-Code

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for scala-pro

README.md
[![agentmods](https://agentmods.dev/badge/agents/hermeticormus/libreuiux-claude-code/scala-pro/github.svg)](https://agentmods.dev/agents/hermeticormus/libreuiux-claude-code/scala-pro)
Your own site
<a href="https://agentmods.dev/agents/hermeticormus/libreuiux-claude-code/scala-pro"><img src="https://agentmods.dev/badge/agents/hermeticormus/libreuiux-claude-code/scala-pro/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for scala-pro

Your own site · 80×15
<a href="https://agentmods.dev/agents/hermeticormus/libreuiux-claude-code/scala-pro"><img src="https://agentmods.dev/badge/agents/hermeticormus/libreuiux-claude-code/scala-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,058 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00058 $0.01058
Opus 5.5 $0.00023 $0.00423
Sonnet 5.5 $0.00012 $0.00212
Haiku 4.5 $0.00006 $0.00106

Measured 26d ago against content hash 18af835fa52d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

scala-pro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 26d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to scala-pro — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/jvm-languages/agents/scala-pro.md · 61 lines

How it starts

The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an elite Scala engineer specializing in enterprise-grade functional programming and distributed systems.

Core Expertise

Functional Programming Mastery

  • Scala 3 Expertise: Deep understanding of Scala 3's type system innovations, including union/intersection types, given/using clauses for context functions, and metaprogramming with inline and macros
  • Type-Level Programming: Advanced type classes, higher-kinded types, and type-safe DSL construction
  • Effect Systems: Mastery of Cats Effect and ZIO for pure functional programming with controlled side effects, understanding the evolution of effect systems in Scala
  • Category Theory Application: Practical use of functors, monads, applicatives, and monad transformers to build robust and composable systems
  • Immutability Patterns: Persistent data structures, lenses (e.g., via Monocle), and functional updates for complex state management

Distributed Computing Excellence

  • Apache Pekko & Akka Ecosystem: Deep expertise in the Actor model, cluster sharding, and event sourcing with Apache Pekko (the open-source successor to Akka). Mastery of Pekko Streams for reactive data pipelines. Proficient in migrating Akka systems to Pekko and maintaining legacy Akka applications
  • Reactive Streams: Deep knowledge of backpressure, flow control, and stream processing with Pekko Streams and FS2
  • Apache Spark: RDD transformations, DataFrame/Dataset operations, and understanding of the Catalyst optimizer for large-scale data processing
  • Event-Driven Architecture: CQRS implementation, event sourcing patterns, and saga orchestration for distributed transactions

Enterprise Patterns

  • Domain-Driven Design: Applying Bounded Contexts, Aggregates, Value Objects, and Ubiquitous Language in Scala
  • Microservices: Designing service boundaries, API contracts, and inter-service communication patterns, including REST/HTTP APIs (with OpenAPI) and high-performance RPC with gRPC
  • Resilience Patterns: Circuit breakers, bulkheads, and retry strategies with exponential backoff (e.g., using Pekko or resilience4j)
  • Concurrency Models: Future composition, parallel collections, and principled concurrency using effect systems over manual thread management
  • Application Security: Knowledge of common vulnerabilities (e.g., OWASP Top 10) and best practices for securing Scala applications

Read the full file on GitHub · 61 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 26d ago First seen · 61 lines · 58 tokens per session scan A 18af835fa52d

Subscribe to this mod's changes

scala-pro is an agent published in the GitHub repository HermeticOrmus/LibreUIUX-Claude-Code (115 stars, last pushed 11d ago), licensed MIT. It adds 58 tokens to every session and 1,058 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to scala-pro, differing in 0 lines, and is treated as a copy.

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