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Agent skill

Kotlin Concurrency And Flow

by chrisbanes in chrisbanes/skills

A skill your agent uses when writing or reviewing Kotlin coroutine scope ownership, raw Thread or Executor work, init launches, non-suspending launch APIs, runBlocking, cancellation, StateFlow…

Apache-2.0Auto-check passedMobile

Install Kotlin Concurrency And Flow

skills CLI
$ npx skills add chrisbanes/skills --skill kotlin-concurrency-and-flow -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install chrisbanes/skills kotlin-concurrency-and-flow --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/chrisbanes/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/kotlin-concurrency-and-flow .claude/skills/kotlin-concurrency-and-flow && rm -rf skills-src

Use ~/.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/

Facts

Skill name
kotlin-concurrency-and-flow
GitHub stars
1.1k
Token cost
~679 tokens
SKILL.md length
317 words
Files
3 (incl. references)
Skills in repo
19
Repo updated
First seen
Licence
Apache-2.0

At a glance

A skill your agent uses when writing or reviewing Kotlin coroutine scope ownership, raw Thread or Executor work, init launches, non-suspending launch APIs, runBlocking, cancellation, StateFlow…

  • Works in 7 steps: Identify each coroutine owner,… → Before changing an API, compare its… → Select a scope whose lifecycle owns the… → …
  • Reviewing Kotlin coroutine scope ownership
  • SKILL.md covers Core principle, Procedure and Topic router
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Kotlin Concurrency And Flow is an agent skill from chrisbanes/skills. Use when writing or reviewing Kotlin coroutine scope ownership, raw Thread or Executor work, init launches, non-suspending launch APIs, runBlocking, cancellation, StateFlow, SharedFlow, Channel, stateIn, SharingStarted, state updates, or one-shot events.

Its SKILL.md is about 680 tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `references/flow-state-events.md` and `references/structured-concurrency.md`).

It sits in Mobile, covering Android development. It works with Kotlin. The repository describes itself as: Skills for Kotlin, Jetpack Compose, and Android development. The licence is Apache-2.0.

When your agent uses it

  • Reviewing Kotlin coroutine scope ownership
  • Non-suspending launch APIs
  • One-shot events

Example prompts

  • “/kotlin-concurrency-and-flow”

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Identify each coroutine owner, cancellation boundary, producer, consumer,
  2. Before changing an API, compare its existing caller-visible contract with
  3. Select a scope whose lifecycle owns the work; do not retain arbitrary scopes
  4. Model renderable, current data as state and imperative one-shot work as an
  5. Choose Flow sharing and buffering semantics from the producer and consumer
  6. Read the focused reference for the material concern below.
  7. Finish when cancellation, restart, replay, and failure behavior are all

What it can do on your machine

Read from SKILL.md and the folder at commit 037aab9. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Kotlin Concurrency And Flow loads about 679 tokens when it runs, and up to ~2.7k if it reads all its reference files. Until then it costs about 71 tokens; SKILL.md has 317 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~71
When it runs · the whole SKILL.md, loaded when a task matches
~679
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.7k

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 chrisbanes/skills at commit 037aab9, republished under its Apache-2.0 licence (© chrisbanes). 317 words, ~679 tokens.

Download SKILL.mdSave it as .claude/skills/kotlin-concurrency-and-flow/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
kotlin-concurrency-and-flow
description
Use when writing or reviewing Kotlin coroutine scope ownership, raw Thread or Executor work, init launches, non-suspending launch APIs, runBlocking, cancellation, StateFlow, SharedFlow, Channel, stateIn, SharingStarted, state updates, or one-shot events.

Kotlin concurrency and Flow

Core principle

Give asynchronous work an explicit owner and lifetime, then model durable state and transient events with primitives whose delivery and replay semantics match the product contract.

Procedure

  1. Identify each coroutine owner, cancellation boundary, producer, consumer, durable state, and transient event.
  2. Before changing an API, compare its existing caller-visible contract with the required owner and lifetime. If a suspend API already gives its caller cancellation, result, and failure ownership, finish with no change; do not add a scope, launch, callback, or deferred wrapper merely for convenience.
  3. Select a scope whose lifecycle owns the work; do not retain arbitrary scopes or hide unstructured launches behind non-suspending APIs.
  4. Model renderable, current data as state and imperative one-shot work as an event only when its loss and replay behavior are explicitly acceptable. Ask whether one consumer handles each event or every active consumer must receive it. A Channel hands each event to one consumer; a configured SharedFlow broadcasts to active consumers. If that consumer contract is unknown, state both options and the decision needed before choosing one. For a one-consumer navigation handoff that must survive a collector gap, choose a buffered Channel exposed as receiveAsFlow(); do not preserve a replay-zero SharedFlow after identifying event loss as the defect.
  5. Choose Flow sharing and buffering semantics from the producer and consumer lifetimes rather than from a default.
  6. Read the focused reference for the material concern below.
  7. Finish when cancellation, restart, replay, and failure behavior are all observable from the public API and no caller must guess who owns the work.

Topic router

SignalRead
Stored CoroutineScope, raw Thread or Executor work, init { launch }, fire-and-forget API, runBlocking, broad catch, or cancellation boundaryStructured concurrency
StateFlow, SharedFlow, Channel, stateIn, SharingStarted, .value, state updates, sentinel values, or one-shot eventsFlow state and events
Compose collection or UI effect handlingCompose state and effects

© chrisbanes, 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 2 other files (references) in skills/kotlin-concurrency-and-flow of chrisbanes/skills.

  • SKILL.md
  • references/flow-state-events.md
  • references/structured-concurrency.md

Open the folder on GitHubat commit 037aab9

Compare with similar skills

Kotlin Concurrency And Flow 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.

Kotlin Concurrency And Flow compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Kotlin Concurrency And Flow this skillchrisbanes/skills1.1k—~679Automated safety check: PassApache-2.0
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Kotlin Patternsgetknit/knit1335 repos~4.7kAutomated safety check: PassGPL-3.0
Summoncodeyousef/summon167—~1.1kAutomated safety check: PassApache-2.0
Add JSON Schemayontrack/yontrack102—~883Automated safety check: PassMIT
Add Ktnip Parameter Strategyvendelieu/telegram-bot249—~613Automated safety check: PassApache-2.0

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Works with

Categories

Questions about Kotlin Concurrency And Flow

What does Kotlin Concurrency And Flow do?

A skill your agent uses when writing or reviewing Kotlin coroutine scope ownership, raw Thread or Executor work, init launches, non-suspending launch APIs, runBlocking, cancellation, StateFlow…. Kotlin Concurrency And Flow is an agent skill from chrisbanes/skills. Use when writing or reviewing Kotlin coroutine scope ownership, raw Thread or Executor work, init launches, non-suspending launch APIs, runBlocking, cancellation, StateFlow, SharedFlow, Channel, stateIn, SharingStarted, state updates, or one-shot events.

When should I use Kotlin Concurrency And Flow?

Kotlin Concurrency And Flow fits situations like: reviewing Kotlin coroutine scope ownership; non-suspending launch APIs; one-shot events.

How do I install Kotlin Concurrency And Flow in Claude Code?

Run `npx skills add chrisbanes/skills --skill kotlin-concurrency-and-flow -a claude-code`. Or copy the skill folder (skills/kotlin-concurrency-and-flow in chrisbanes/skills) into .claude/skills/kotlin-concurrency-and-flow in your project. Claude Code loads it when a task matches its description.

How do I install Kotlin Concurrency And Flow in Codex?

Run `npx skills add chrisbanes/skills --skill kotlin-concurrency-and-flow -a codex`. Or copy the skill folder (skills/kotlin-concurrency-and-flow in chrisbanes/skills) into .agents/skills/kotlin-concurrency-and-flow in your project. Codex loads it when a task matches its description.

Can I use Kotlin Concurrency And Flow 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 chrisbanes/skills --skill kotlin-concurrency-and-flow -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/kotlin-concurrency-and-flow, .gemini/skills/kotlin-concurrency-and-flow, .github/skills/kotlin-concurrency-and-flow and .opencode/skills/kotlin-concurrency-and-flow in your project.

What does Kotlin Concurrency And Flow need to run?

SKILL.md names no scripts, command-line tools or credentials: Kotlin Concurrency And Flow is instructions for the agent only.

Does Kotlin Concurrency And Flow 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 Kotlin Concurrency And Flow 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 Kotlin Concurrency And Flow use?

Kotlin Concurrency And Flow is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Kotlin Concurrency And Flow use?

About 679 tokens (SKILL.md is roughly 2.7k 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 2k tokens, read only when the agent opens those files.

What are the alternatives to Kotlin Concurrency And Flow?

Skills that share tags, products or a category with Kotlin Concurrency And Flow: Compose Multiplatform Patterns (monta-app/ocpp-emulator, 180 stars), Kotlin Patterns (getknit/knit, 133 stars), Summon (codeyousef/summon, 167 stars) and Add JSON Schema (yontrack/yontrack, 102 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Kotlin Concurrency And Flow?

chrisbanes (a GitHub user) maintains it in chrisbanes/skills, which has 1,093 GitHub stars. The repository holds 19 skills in this directory. The repository was last updated on October 9, 2026.

Source: chrisbanes/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.