125-java-concurrency SKILL.md skillA
125-java-concurrency from jabrena/plinth is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jabrena/plinth/125-java-concurrency@v0.19.0Pins v0.19.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jabrena/plinth
- Path
skills/125-java-concurrency/SKILL.md- Versions recorded
- 6
- Latest version
- v0.19.0, committed Sep 26, 2026
- First version recorded
- Apr 26, 2026
- Size
- 4,369 bytes
- Repository stars
- 461
- License
- Apache-2.0
Use when you need to apply Java concurrency best practices — including thread safety fundamentals, ExecutorService thread pool management, concurrent design patterns like Producer-Consumer, asynchronous programming with CompletableFuture, immutability and safe publication, deadlock avoidance, virtual threads, structured concurrency, scoped values, backpressure, cancellation discipline, and observability for concurrent systems. This should trigger for requests such as Review Java code for…
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
# Java rules for Concurrency objects Identify and apply Java concurrency best practices to improve thread safety, scalability, and maintainability by using modern `java.util.concurrent` utilities and virtual threads. **What is covered in this Skill?** - Thread safety fundamentals: `ConcurrentHashMap`, `AtomicInteger`, `ReentrantLock`, `ReadWriteLock`, Java Memory Model - `ExecutorService` thread pool configuration: sizing, keep-alive, bounded queues, rejection policies, graceful shutdown - Producer-Consumer and Publish-Subscribe patterns with `BlockingQueue` - `CompletableFuture` for non-blocking async composition (`thenApply`/`thenCompose`/`exceptionally`/`orTimeout`) - Immutability and safe publication (`volatile`, static initializers) - Lock contention and false-sharing performance optimization - Virtual threads (`Executors.newVirtualThreadPerTaskExecutor()`) for I/O-bound scalability - Structured Concurrency (`StructuredTaskScope`) for related subtasks in Java 27 preview - `ScopedValue` over `ThreadLocal` for immutable cross-task data - Cooperative cancellation and `InterruptedException` discipline - Backpressure with bounded queues and `CallerRunsPolicy` …
Read the whole file at its exact version.
How to install
mdr add jabrena/plinth/125-java-concurrency@sha256:95a00ae1b5650fd4The line at the top of this page pins the label v0.19.0, 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_g3d3qhmfmqfgssbm)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Apr 26, 2026 and Sep 26, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.19.0 latest | 2026-09-26 | 9569c35 | 4,369 B | A | view · diff |
| v0.18.0 | 2026-08-01 | 26b0e71 | 4,369 B | A | view · diff |
| v0.17.0 | 2026-07-10 | aaee915 | 4,369 B | A | view · diff |
| v0.16.0 | 2026-06-15 | b73c9d3 | 3,879 B | A | view · diff |
| v0.15.0 | 2026-05-29 | a800339 | 3,710 B | A | view · diff |
| v0.15.0-SNAPSHOT | 2026-04-26 | 819f349 | 3,719 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 (4369 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
jabrena/plinth · 461 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_g3d3qhmfmqfgssbm GET https://markdownregistry.com/api/v1/resolve?ref=jabrena/plinth/125-java-concurrency GET https://markdownregistry.com/api/v1/blob/95a00ae1b5650fd4de07ddcb30fa67e238f1854bbb74be366fd5ce868bdc75fe
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.