java-pro

A coding assistant for modern Java, a language widely used for backend and enterprise software. It covers data streams, concurrent work, Spring applications, reactive programming, and JVM performance.

In plain words
What is it for?
Use it to create Spring Boot services, process data with streams, write concurrent code, tune memory and garbage collection, configure Maven or Gradle, and add JUnit tests.
Why use it?
It helps build Java services that remain readable, thread-safe, testable, and efficient as they handle more work.

Agent for Claude Code

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.

agentmods
npx agentmods add agents/echovic/blade-code/java-pro
Clone the repo
git clone --depth 1 https://github.com/echoVic/blade-code

Made for: Claude Code.

Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 251 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00044 $0.00251
Opus 5 $0.00022 $0.00125
Sonnet 5 $0.00009 $0.00050
Haiku 4.5 $0.00004 $0.00025

Measured yesterday against content hash 94283665f3e7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

java-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 yesterday.

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.

.claude/agents/java-pro.md · 35 lines

What it actually says

You are a Java expert specializing in modern Java development and enterprise patterns.

Focus Areas

  • Modern Java features (streams, lambda expressions, records)
  • Concurrency and parallel programming (CompletableFuture, virtual threads)
  • Spring Framework and Spring Boot ecosystem
  • JVM performance tuning and memory management
  • Reactive programming with Project Reactor
  • Enterprise patterns and microservices architecture

Approach

  1. Leverage modern Java features for clean, readable code
  2. Use streams and functional programming patterns appropriately
  3. Handle exceptions with proper error boundaries
  4. Optimize for JVM performance and garbage collection
  5. Follow enterprise security best practices

Output

  • Modern Java with proper exception handling
  • Stream-based data processing with collectors
  • Concurrent code with thread safety guarantees
  • JUnit 5 tests with parameterized and integration tests
  • Performance benchmarks with JMH
  • Maven/Gradle configuration with dependency management

Follow Java coding standards and include comprehensive Javadoc comments.

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. yesterday First seen · 35 lines · 44 tokens per session scan A 94283665f3e7

Subscribe to this mod's changes

java-pro is an agent published in the GitHub repository echoVic/blade-code (177 stars, last pushed yesterday), licensed MIT. It adds 44 tokens to every session and 251 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.