Context Handling in fp-go
IBM/fp-go
Covers handling Go's context.Context idiomatically in fp-go code: reading and scoping context through operators, timeouts, cancellation and converting ctx-first functions.
A skill your agent uses when you need to apply Java concurrency best practices — including thread safety fundamentals, ExecutorService thread pool management, concurrent design patterns like…
Install 125 Java Concurrency
$ npx skills add jabrena/plinth --skill 125-java-concurrency -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install jabrena/plinth 125-java-concurrency --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/jabrena/plinth.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/125-java-concurrency .claude/skills/125-java-concurrency && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "125-java-concurrency" agent skill from https://github.com/jabrena/plinth/tree/main/skills/125-java-concurrency into .claude/skills/125-java-concurrency/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "125-java-concurrency", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/jabrena/plinth/tree/main/skills/125-java-concurrencyType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add jabrena/plinth --skill 125-java-concurrency -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install jabrena/plinth 125-java-concurrency --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jabrena/plinth.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/125-java-concurrency .agents/skills/125-java-concurrency && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "125-java-concurrency" agent skill from https://github.com/jabrena/plinth/tree/main/skills/125-java-concurrency into .agents/skills/125-java-concurrency/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "125-java-concurrency", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jabrena/plinth --skill 125-java-concurrency -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install jabrena/plinth 125-java-concurrency --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jabrena/plinth.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/125-java-concurrency .cursor/skills/125-java-concurrency && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "125-java-concurrency" agent skill from https://github.com/jabrena/plinth/tree/main/skills/125-java-concurrency into .cursor/skills/125-java-concurrency/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "125-java-concurrency", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/jabrena/plinth.git --path skills/125-java-concurrency--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add jabrena/plinth --skill 125-java-concurrency -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install jabrena/plinth 125-java-concurrency --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jabrena/plinth.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/125-java-concurrency .gemini/skills/125-java-concurrency && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "125-java-concurrency" agent skill from https://github.com/jabrena/plinth/tree/main/skills/125-java-concurrency into .gemini/skills/125-java-concurrency/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "125-java-concurrency", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install jabrena/plinth 125-java-concurrencyInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add jabrena/plinth --skill 125-java-concurrency -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/jabrena/plinth.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/125-java-concurrency .github/skills/125-java-concurrency && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "125-java-concurrency" agent skill from https://github.com/jabrena/plinth/tree/main/skills/125-java-concurrency into .github/skills/125-java-concurrency/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "125-java-concurrency", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add jabrena/plinth --skill 125-java-concurrency -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install jabrena/plinth 125-java-concurrency --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/jabrena/plinth.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/125-java-concurrency .opencode/skills/125-java-concurrency && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "125-java-concurrency" agent skill from https://github.com/jabrena/plinth/tree/main/skills/125-java-concurrency into .opencode/skills/125-java-concurrency/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "125-java-concurrency", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
125-java-concurrency- GitHub stars
- 446
- Token cost
- ~1.1k tokens
- SKILL.md length
- 377 words
- Files
- 2 (incl. references)
- Skills in repo
- 124
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
A skill your agent uses when you need to apply Java concurrency best practices — including thread safety fundamentals, ExecutorService thread pool management, concurrent design patterns like…
- You need to apply Java concurrency best practices — including thread safety fundamentals
- SKILL.md covers Constraints, When to use this skill, Workflow and Reference
- Calls mvn
- ExecutorService thread pool management
What it does
125 Java Concurrency is an agent skill from jabrena/plinth. 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 concurrency; Review Java…
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/125-java-concurrency.md`).
It sits in Development, covering Async programming, Task breakdown and Design patterns. It works with Java. The repository describes itself as: Plinth is an AI-native engineering toolkit for modern Java enterprise SDLC, built around reusable Commands, Agents, Skills, and MCP Servers. The licence is Apache-2.0.
When your agent uses it
- 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
Example prompts
- “/125-java-concurrency”
What it can do on your machine
Read from SKILL.md and the folder at commit dca88dc. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
mvn
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
125 Java Concurrency loads about 1.1k tokens when it runs, and up to ~21k if it reads all its reference files. Until then it costs about 199 tokens; SKILL.md has 377 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from jabrena/plinth at commit dca88dc, republished under its Apache-2.0 licence (© jabrena). 377 words, ~1,091 tokens.
Download SKILL.mdSave it as
.claude/skills/125-java-concurrency/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- 125-java-concurrency
- description
- 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 concurrency; Review Java code for thread safety; Fix race conditions in Java concurrency code; Choose ExecutorService or virtual threads in Java; Improve synchronization and shared mutable state handling; Apply structured concurrency for related Java subtasks. Part of Plinth Toolkit
- license
- Apache-2.0
- metadata.author
- Juan Antonio Breña Moral
- metadata.version
- 0.19.0
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 ExecutorServicethread pool configuration: sizing, keep-alive, bounded queues, rejection policies, graceful shutdown- Producer-Consumer and Publish-Subscribe patterns with
BlockingQueue CompletableFuturefor 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 ScopedValueoverThreadLocalfor immutable cross-task data- Cooperative cancellation and
InterruptedExceptiondiscipline - Backpressure with bounded queues and
CallerRunsPolicy - Deadlock avoidance via global lock ordering and
tryLockwith timeouts - ForkJoin/parallel-stream discipline for CPU-bound work
- Virtual-thread pinning detection (JFR
VirtualThreadPinned) - Thread naming and
UncaughtExceptionHandlerobservability - Fit-for-purpose primitives:
LongAdder,CopyOnWriteArrayList,StampedLock,Semaphore,CountDownLatch,Phaser
Scope: The reference is organized by examples (good/bad code patterns) for each core area. Apply recommendations based on applicable examples.
Constraints
Before applying any concurrency changes, ensure the project compiles. If compilation fails, stop immediately — compilation failure is a blocking condition. After applying improvements, run full verification.
- MANDATORY: Run
./mvnw compileormvn compilebefore applying any change - SAFETY: If compilation fails, stop immediately — compilation failure is a blocking condition that prevents any further processing
- VERIFY: Run
./mvnw clean verifyormvn clean verifyafter applying improvements - BEFORE APPLYING: Read the reference for detailed good/bad examples, constraints, and safeguards for each concurrency pattern
Show full SKILL.md (127 more words)Show less
When to use this skill
- Review Java code for concurrency
- Review Java code for thread safety
- Fix race conditions in Java concurrency code
- Choose ExecutorService or virtual threads in Java
- Improve synchronization and shared mutable state handling
- Apply structured concurrency for related Java subtasks
Workflow
- Compile project before concurrency changes
Run ./mvnw compile or mvn compile and stop immediately if compilation fails.
- Read concurrency reference and analyze hotspots
Read references/125-java-concurrency.md and identify thread-safety, coordination, and throughput issues to address.
- Apply concurrency improvements
Implement suitable concurrency patterns, structured task scopes where they fit related subtasks, cancellation discipline, and fit-for-purpose primitives.
- Verify with full build
Run ./mvnw clean verify or mvn clean verify after applying improvements.
Reference
For detailed guidance, examples, and constraints, see references/125-java-concurrency.md.
© jabrena, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/125-java-concurrency of jabrena/plinth.
- SKILL.md
- references/125-java-concurrency.md
Open the folder on GitHubat commit dca88dc
Compare with similar skills
125 Java Concurrency next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| 125 Java Concurrency this skilljabrena/plinth | 446 | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Context Handling in fp-goIBM/fp-go | 2k | — | ~4.2k | Automated safety check: Pass | Apache-2.0 | |
| Java Architecture Reviewdecebals/claude-code-java | 751 | 1 repos | ~2.2k | Automated safety check: Pass | MIT | |
| Java Design Patterns Referencedecebals/claude-code-java | 751 | 1 repos | ~4.4k | Automated safety check: Pass | MIT | |
| JavaScript IO Effects With Sagasparalleldrive/aidd | 384 | — | ~587 | Automated safety check: Pass | MIT | |
| Clean Code Principlesdecebals/claude-code-java | 751 | — | ~3.4k | Automated safety check: Pass | MIT |
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Questions about 125 Java Concurrency
What does 125 Java Concurrency do?
A skill your agent uses when you need to apply Java concurrency best practices — including thread safety fundamentals, ExecutorService thread pool management, concurrent design patterns like…. 125 Java Concurrency is an agent skill from jabrena/plinth. 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.
When should I use 125 Java Concurrency?
125 Java Concurrency fits situations like: 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.
How do I install 125 Java Concurrency in Claude Code?
Run `npx skills add jabrena/plinth --skill 125-java-concurrency -a claude-code`. Or copy the skill folder (skills/125-java-concurrency in jabrena/plinth) into .claude/skills/125-java-concurrency in your project. Claude Code loads it when a task matches its description.
How do I install 125 Java Concurrency in Codex?
Run `npx skills add jabrena/plinth --skill 125-java-concurrency -a codex`. Or copy the skill folder (skills/125-java-concurrency in jabrena/plinth) into .agents/skills/125-java-concurrency in your project. Codex loads it when a task matches its description.
Can I use 125 Java Concurrency in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jabrena/plinth --skill 125-java-concurrency -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/125-java-concurrency, .gemini/skills/125-java-concurrency, .github/skills/125-java-concurrency and .opencode/skills/125-java-concurrency in your project.
What does 125 Java Concurrency need to run?
Going by SKILL.md and its folder, 125 Java Concurrency needs the command-line tools its instructions call (mvn).
Does 125 Java Concurrency access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is 125 Java Concurrency safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does 125 Java Concurrency use?
125 Java Concurrency is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does 125 Java Concurrency use?
About 1.1k tokens (SKILL.md is roughly 4.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 20k tokens, read only when the agent opens those files.
What are the alternatives to 125 Java Concurrency?
Skills that share tags, products or a category with 125 Java Concurrency: Context Handling in fp-go (IBM/fp-go, 2k stars), Java Architecture Review (decebals/claude-code-java, 751 stars), Java Design Patterns Reference (decebals/claude-code-java, 751 stars) and JavaScript IO Effects With Sagas (paralleldrive/aidd, 384 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains 125 Java Concurrency?
jabrena (a GitHub user) maintains it in jabrena/plinth, which has 446 GitHub stars. The repository holds 124 skills in this directory. The repository was last updated on October 7, 2026.
Source: jabrena/plinth on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.