Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/olehsvyrydov/AI-development-teamnpx agentmods add skills/olehsvyrydov/ai-development-team/javaWrote 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.
[](https://agentmods.dev/skills/olehsvyrydov/ai-development-team/java)<a href="https://agentmods.dev/skills/olehsvyrydov/ai-development-team/java"><img src="https://agentmods.dev/badge/skills/olehsvyrydov/ai-development-team/java/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.
<a href="https://agentmods.dev/skills/olehsvyrydov/ai-development-team/java"><img src="https://agentmods.dev/badge/skills/olehsvyrydov/ai-development-team/java.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00136 | $0.06183 |
| Opus 5.5 | $0.00054 | $0.02473 |
| Sonnet 5.5 | $0.00027 | $0.01237 |
| Haiku 4.5 | $0.00014 | $0.00618 |
Grade A, and why
java 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 477 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Java (language skill)
This is a knowledge skill, not an agent: it loads from context whenever Java is written or
reviewed, and the role agents (/be, /rev, /arch) route into it for the language-level
rules. Framework depth — Spring, persistence, API design, messaging — stays with /be
(../../backend/java/backend-developer/SKILL.md) and its
../../backend/java/backend-developer/references/java-expertise.md; this skill owns the language.
Trigger
Use this skill when:
- Writing, editing, or reviewing
.javafiles - Changing
pom.xml,build.gradle,build.gradle.kts, orgradle/libs.versions.toml - Diagnosing a
javac, Error Prone, or JVM test failure - Designing a Java component — domain model, null contract, concurrency topology
- Planning tests for Java code
- Adding a dependency to a JVM build
Do NOT load it for:
- Kotlin — that is
/be's kotlin reference - Spring/API/persistence how-to — that is
/be's java-expertise reference
Context
This skill exists to make Java reviews boring. Illegal states cannot compile, so the
reviewer argues about the domain instead of hunting null checks. Null flows are verified
by a checker at build time, so "can this be null?" has a mechanical answer. Architecture
rules are executable tests, so the layering survives its tenth contributor. Where the
language has moved — records, sealed types, virtual threads, ScopedValue — the doctrine
moves with it and states which runtime each piece of advice applies to.
Documentation Lookup (MANDATORY)
Before implementing any feature, check current documentation. Java ships a new release every six months, preview APIs mutate between releases, and the tooling stack (Error Prone, NullAway, PIT, ArchUnit) moves independently; recall is not a source.
Context7 MCP
Use Context7 MCP to retrieve up-to-date documentation for any library or tool:
- Resolve library: Call
mcp__context7__resolve-library-idwith the library name - Query docs: Call
mcp__context7__query-docswith the resolved library ID and your question
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- today First seen · 477 lines · 136 tokens per session scan A a97943d6ed35
java is a skill published in the GitHub repository olehsvyrydov/AI-development-team (17 stars, last pushed today), licensed MIT. It adds 136 tokens to every session and 6,183 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-10-19.
Other skills, from other repositories
java-conventions
Use when a ticket adds or changes Java code and it must follow the repo's Java conventions — Effective Java, modern Java (records, sealed types, pattern matching, switch expressions), Optional discipline, immutability, try-with-resources, thread safety and virtual threads, Spring Boot constructor injection, and JUnit…
java-specifications
Structural verification for Java and Kotlin — SpotBugs/Error Prone, Detekt. Load when planning, implementing, or reviewing Java/Kotlin code (.java, .kt; build.gradle, pom.xml).
springboot-testing
Spring Boot testing discipline — TDD workflow with JUnit 5, @SpringBootTest slicing (@WebMvcTest, @DataJpaTest), MockMvc, Testcontainers, and the verification gates a Spring Boot change must pass before it ships (build, coverage floor, static analysis, integration checks). Use when writing Spring Boot tests or…
jmh
Write Java microbenchmarks with JMH (Java Microbenchmark Harness) that produce trustworthy numbers — not numbers distorted by JIT dead-code elimination, constant folding, insufficient warmup, or single-fork JIT contamination. Use this skill whenever the user writes @Benchmark, mentions JMH, microbenchmark, throughput…
junit-testing
JUnit 5 testing patterns including annotations, Mockito mocking, Spring Boot test slices, MockMvc, Testcontainers integration, and parameterized tests. Use when the user is writing Java tests, setting up test infrastructure, mocking dependencies, testing Spring controllers, or running integration tests with real…
implement
Use when writing or changing production code for a ClaudeHut light- or full-route task in a Java/Spring project - test-first red-green-refactor, following task.md or the approved plan and the path-scoped project rules. Preloaded into claudehut-implementer.