A set of current engineering rules for Java and Kotlin, programming languages that run on the Java Virtual Machine (JVM). It covers modern language features and coding practices.

It is for writing and auditing JVM code, including code that uses modern Java and Kotlin features.

It gives the agent a defined baseline to follow when creating or checking Java and Kotlin code.

sota-jvm — Skill for Claude Code by martinholovsky/SOTA-skills

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.

Any agent

npx skills add martinholovsky/SOTA-skills --skill sota-jvm

Clone the repo

git clone --depth 1 https://github.com/martinholovsky/SOTA-skills

Made for: Claude Code.

Or install sota-skills, the plugin that ships this one along with the rest of its 43 skills, 5 commands, 4 hooks, 1 MCP server.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/martinholovsky/sota-skills/sota-jvm/github.svg)](https://agentmods.dev/skills/martinholovsky/sota-skills/sota-jvm)

Your own site

<a href="https://agentmods.dev/skills/martinholovsky/sota-skills/sota-jvm"><img src="https://agentmods.dev/badge/skills/martinholovsky/sota-skills/sota-jvm/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/martinholovsky/sota-skills/sota-jvm"><img src="https://agentmods.dev/badge/skills/martinholovsky/sota-skills/sota-jvm.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 254 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,654 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00254	$0.03654
Opus 5.5	$0.00102	$0.01462
Sonnet 5.5	$0.00051	$0.00731
Haiku 4.5	$0.00025	$0.00365

Measured 10d ago against content hash 9a0b5f34b6a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sota-jvm 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 10d 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.

skills/sota-jvm/SKILL.md · 149 lines

The source is not reproduced here

Licensed CC-BY-4.0

The repository is licensed CC-BY-4.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

8 files 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.

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.

10d ago Changed · +3 lines 9a0b5f34b6a6
11d ago Changed 3364cf5cebb2
12d ago Changed · +2 lines a4812b50df87
24d ago Changed 8e196d278db5
1mo ago Changed · -10 tokens per session b1236b793783
1mo ago Changed · +3 lines db484dcf0139
1mo ago Changed 006b45ceca10
1mo ago Changed 3149ebbf0032
2mo ago First seen · 141 lines · 264 tokens per session scan A 4875f1e85e4e

Subscribe to this mod's changes

sota-jvm is a skill published in the GitHub repository martinholovsky/SOTA-skills (26 stars, last pushed yesterday), licensed CC-BY-4.0. It adds 254 tokens to every session and 3,654 once invoked, about $0.0010 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 2026-08-30.

Claude Code Java Kotlin and Swift Languages ai-agents ai-coding-assistant anthropic best-practices claude

sota-jvm next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
sota-jvmmartinholovsky/SOTA-skills	Skill	26	yesterday	CC-BY-4.0	A	254	Claude Code
maven-gradle-guideVersoXBT/claude-initial-setup	Skill	4	6mo ago	MIT	A	88	Claude Code
java-conventionstmj-90/gaffer	Skill	2	2d ago	Apache-2.0	A	106	Claude Code, Codex
kotlin-conventionstmj-90/gaffer	Skill	2	2d ago	Apache-2.0	A	115	Claude Code, Codex
swift-conventionstmj-90/gaffer	Skill	2	2d ago	Apache-2.0	A	133	Claude Code, Codex
junit-testingVersoXBT/claude-initial-setup	Skill	4	6mo ago	MIT	A	86	Claude Code
spring-boot-patternsVersoXBT/claude-initial-setup	Skill	4	6mo ago	MIT	A	83	Claude Code