sota-jvm SKILL.md skillA
sota-jvm from martinholovsky/sota-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add martinholovsky/sota-skills/sota-jvm@git:20261026.6d94711Pins git:20261026.6d94711 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- martinholovsky/sota-skills
- Path
skills/sota-jvm/SKILL.md- Versions recorded
- 19
- Latest version
- git:20261026.6d94711, committed Oct 26, 2026
- First version recorded
- Jun 29, 2026
- Size
- 13,823 bytes
- Repository stars
- 26
- License
- CC-BY-4.0
State-of-the-art JVM engineering rules for Java and Kotlin that Claude applies when writing or auditing JVM code. Java LTS releases (virtual threads final since 21; structured concurrency still preview), modern Kotlin. Covers modern idioms (records, sealed types, pattern matching, Kotlin null-safety/coroutines), API/null/immutability design, concurrency (virtual threads, JMM, java.util.concurrent, coroutines), security (deserialization/gadget chains, XXE, JNDI/Log4Shell-class, injection, JCA…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# SOTA JVM — Java & Kotlin (2026) Expert-level rules for producing and auditing production JVM code. The JVM is memory-safe (no buffer overflows/UAF), so the risk shifts to **deserialization and injection RCE, concurrency correctness, and dependency supply chain**. Written for **Java 25 LTS** (records, sealed types, pattern matching, virtual threads finalized in 21 via JEP 444; scoped values finalized in 25 via JEP 506; structured concurrency is still *preview* — JEP 505 in 25 — don't present it as final), **Kotlin 2.x**. Per-language idioms differ; shared concerns (the JMM, the JCA, the build/ supply-chain story) are unified here. Every rule states the *why*; every rules file ends with an audit checklist of grep/analyzer patterns. ## Purpose Two consumers, one source of truth: - **BUILD mode** — generating Java/Kotlin: follow the rules as defaults. Prefer immutability, null-safety, and the standard concurrency primitives. Deviate only with a comment justifying it. - **AUDIT mode** — reviewing existing code: hunt violations with the audit checklists, classify by severity, report in the finding format below. …
Read the whole file at its exact version.
How to install
mdr add martinholovsky/sota-skills/sota-jvm@sha256:9a0b5f34b6a65432The line at the top of this page pins the label git:20261026.6d94711, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_hjhsugu6u5sunzx7)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 19 versions of this file, between Jun 29, 2026 and Oct 26, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261026.6d94711 latest | 2026-10-26 | 6d94711 | 13,823 B | A | view · diff |
| git:20261026.808c340 | 2026-10-26 | 808c340 | 13,820 B | A | view · diff |
| git:20261025.4bffa60 | 2026-10-25 | 4bffa60 | 13,598 B | A | view · diff |
| git:20261025.edb0d8a | 2026-10-25 | edb0d8a | 13,554 B | A | view · diff |
| git:20261025.c05557f | 2026-10-25 | c05557f | 13,174 B | A | view · diff |
| git:20261024.8dd2b0a | 2026-10-24 | 8dd2b0a | 13,139 B | A | view · diff |
| git:20261012.ae1b29b | 2026-10-12 | ae1b29b | 12,898 B | A | view · diff |
| git:20260926.e89beb1 | 2026-09-26 | e89beb1 | 12,265 B | A | view · diff |
| git:20260925.0da8106 | 2026-09-25 | 0da8106 | 12,311 B | A | view · diff |
| git:20260925.9af1226 | 2026-09-25 | 9af1226 | 11,889 B | A | view · diff |
| git:20260925.369b521 | 2026-09-25 | 369b521 | 11,488 B | A | view · diff |
| git:20260925.5ef7703 | 2026-09-25 | 5ef7703 | 11,257 B | A | view · diff |
| git:20260925.51daf1f | 2026-09-25 | 51daf1f | 11,105 B | A | view · diff |
| git:20260925.22599bd | 2026-09-25 | 22599bd | 10,903 B | A | view · diff |
| git:20260925.0e5a58b | 2026-09-25 | 0e5a58b | 10,756 B | A | view · diff |
| git:20260820.7720f5a | 2026-08-20 | 7720f5a | 9,589 B | A | view · diff |
| git:20260708.1a1eff6 | 2026-07-08 | 1a1eff6 | 9,486 B | A | view · diff |
| git:20260701.1c5bd88 | 2026-07-01 | 1c5bd88 | 9,397 B | A | view · diff |
| git:20260629.2ffd9f5 | 2026-06-29 | 2ffd9f5 | 9,320 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13823 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
martinholovsky/sota-skills · 26 stars · license CC-BY-4.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hjhsugu6u5sunzx7 GET https://markdownregistry.com/api/v1/resolve?ref=martinholovsky/sota-skills/sota-jvm GET https://markdownregistry.com/api/v1/blob/9a0b5f34b6a65432f2856c888cf8b44cb5ec91264205f9b23079ea694e2ed74b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.