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kotlin

Kotlin (JetBrains 製プログラミング言語, kotlinlang.org) の言語仕様・標準ライブラリ・ツールチェーン。

null safety, data class, sealed class, 拡張関数, context parameters, スコープ関数 (let / run / apply / also / with), コレクション, Uuid, Duration (kotlin.time), kotlinx.coroutines (suspend, Flow), kotlinx.serialization (@Serializable, Json, ProtoBuf, CBOR), KGP, Maven, KSP, kapt, K2, KDoc。

中文简介正在准备中。当前显示原文说明。

查看安装方法

包含的文件(198)

  • SKILL.md7.7 KB
  • references/basics/annotations.md6.9 KB
  • references/basics/basic-syntax.md5.3 KB
  • references/basics/coding-conventions.md8.4 KB
  • references/basics/control-flow.md7.0 KB
  • references/basics/destructuring-declarations.md3.9 KB
  • references/basics/equality.md2.4 KB
  • references/basics/exceptions.md5.1 KB
  • references/basics/idioms.md5.5 KB
  • references/basics/keyword-reference.md8.6 KB
  • references/basics/kotlin-doc.md3.0 KB
  • references/basics/null-safety.md3.5 KB
  • references/basics/packages.md3.0 KB
  • references/basics/README.md2.9 KB
  • references/basics/returns.md2.4 KB
  • references/basics/visibility-modifiers.md2.9 KB
  • references/build-tools/build-tools-api.md2.6 KB
  • references/build-tools/gradle-best-practices.md2.4 KB
  • references/build-tools/gradle-binary-compatibility-validation.md3.1 KB
  • references/build-tools/gradle-compilation-and-caches.md7.5 KB
  • references/build-tools/gradle-compiler-options.md10.5 KB
  • references/build-tools/gradle-configure-project.md13.6 KB
  • references/build-tools/gradle-plugin-variants.md2.3 KB
  • references/build-tools/gradle.md1.6 KB
  • references/build-tools/kotlin-daemon.md2.4 KB
  • references/build-tools/maven-compile-package.md1.7 KB
  • references/build-tools/maven-configure-project.md8.4 KB
  • references/build-tools/maven-kotlin-compiler.md3.5 KB
  • references/build-tools/maven-set-dependencies.md4.0 KB
  • references/build-tools/maven.md1.6 KB
  • references/build-tools/README.md3.3 KB
  • references/classes-objects/classes.md3.8 KB
  • references/classes-objects/data-classes.md2.6 KB
  • references/classes-objects/delegated-properties.md5.8 KB
  • references/classes-objects/delegation.md1.7 KB
  • references/classes-objects/enum-classes.md5.4 KB
  • references/classes-objects/extensions.md5.5 KB
  • references/classes-objects/fun-interfaces.md2.7 KB
  • references/classes-objects/inheritance.md3.3 KB
  • references/classes-objects/inline-classes.md3.8 KB
  • references/classes-objects/interfaces.md2.7 KB
  • references/classes-objects/nested-classes.md1.6 KB
  • references/classes-objects/object-declarations.md4.7 KB
  • references/classes-objects/properties.md4.3 KB
  • references/classes-objects/README.md2.7 KB
  • references/classes-objects/sealed-classes.md5.1 KB
  • references/classes-objects/this-expressions.md3.3 KB
  • references/collections/collection-aggregate.md3.4 KB
  • references/collections/collection-elements.md2.7 KB
  • references/collections/collection-filtering.md2.3 KB
  • references/collections/collection-grouping.md2.2 KB
  • references/collections/collection-operations.md2.9 KB
  • references/collections/collection-ordering.md3.7 KB
  • references/collections/collection-parts.md3.1 KB
  • references/collections/collection-plus-minus.md1.3 KB
  • references/collections/collection-transformations.md3.2 KB
  • references/collections/collection-write.md2.3 KB
  • references/collections/collections-overview.md3.1 KB
  • references/collections/constructing-collections.md3.4 KB
  • references/collections/iterators.md2.4 KB
  • references/collections/list-operations.md4.2 KB
  • references/collections/map-operations.md3.6 KB
  • references/collections/ranges.md2.1 KB
  • references/collections/README.md3.9 KB
  • references/collections/sequences.md2.8 KB
  • references/collections/set-operations.md1.5 KB
  • references/compiler/all-open-plugin.md2.6 KB
  • references/compiler/command-line.md1.9 KB
  • references/compiler/compiler-execution-strategy.md2.2 KB
  • references/compiler/compiler-plugins-overview.md2.6 KB
  • references/compiler/compiler-reference.md11.6 KB
  • references/compiler/compose-compiler-migration-guide.md2.0 KB
  • references/compiler/compose-compiler-options.md1.8 KB
  • references/compiler/custom-compiler-plugins.md3.2 KB
  • references/compiler/k2-compiler-migration-guide.md4.8 KB
  • references/compiler/kapt.md6.9 KB
  • references/compiler/ksp-command-line.md3.4 KB
  • references/compiler/ksp-incremental.md3.9 KB
  • references/compiler/ksp-kapt-migration.md1.5 KB
  • references/compiler/ksp-kotlin-model.md4.4 KB
  • references/compiler/ksp-multi-round.md2.7 KB
  • references/compiler/ksp-multiplatform.md2.4 KB
  • references/compiler/ksp-overview.md3.1 KB
  • references/compiler/ksp-quickstart.md5.7 KB
  • references/compiler/ksp-reference.md17.1 KB
  • references/compiler/lombok.md2.8 KB
  • references/compiler/no-arg-plugin.md2.3 KB
  • references/compiler/power-assert.md5.5 KB
  • references/compiler/README.md4.3 KB
  • references/compiler/sam-with-receiver-plugin.md2.0 KB
  • references/coroutines/async-programming.md6.5 KB
  • references/coroutines/channels.md5.2 KB
  • references/coroutines/composing-suspending-functions.md4.0 KB
  • references/coroutines/coroutine-context-and-dispatchers.md6.4 KB
  • references/coroutines/coroutines-basics.md7.2 KB
  • references/coroutines/coroutines-cancellation.md7.8 KB
  • references/coroutines/coroutines-debugging.md6.7 KB
  • references/coroutines/coroutines-flow-operators.md5.1 KB
  • references/coroutines/coroutines-flow.md10.4 KB
  • references/coroutines/coroutines-guide.md2.3 KB
  • references/coroutines/coroutines-overview.md2.4 KB
  • references/coroutines/exception-handling.md5.2 KB
  • references/coroutines/README.md3.1 KB
  • references/coroutines/select-expression.md4.6 KB
  • references/coroutines/shared-mutable-state-and-concurrency.md3.7 KB
  • references/functions/context-parameters.md3.5 KB
  • references/functions/functions.md5.9 KB
  • references/functions/inline-functions.md2.9 KB
  • references/functions/lambdas.md4.7 KB
  • references/functions/operator-overloading.md3.5 KB
  • references/functions/README.md1.9 KB
  • references/functions/type-safe-builders.md3.6 KB
  • references/functions/unused-return-value-checker.md4.5 KB
  • references/functions/using-builders-with-builder-inference.md3.6 KB
  • references/java-interop/comparison-to-java.md3.7 KB
  • references/java-interop/java-interop.md17.1 KB
  • references/java-interop/java-to-kotlin-collections-guide.md9.6 KB
  • references/java-interop/java-to-kotlin-idioms-strings.md4.2 KB
  • references/java-interop/java-to-kotlin-interop.md10.9 KB
  • references/java-interop/java-to-kotlin-nullability-guide.md4.9 KB
  • references/java-interop/jvm-records.md3.3 KB
  • references/java-interop/README.md1.6 KB
  • references/releases/compatibility-guide-23.md8.4 KB
  • references/releases/compatibility-guide-24.md8.1 KB
  • references/releases/components-stability.md4.0 KB
  • references/releases/kotlin-evolution-principles.md5.8 KB
  • references/releases/kotlin-language-features-and-proposals.md3.2 KB
  • references/releases/README.md2.8 KB
  • references/releases/releases.md4.4 KB
  • references/releases/whatsnew23.md7.6 KB
  • references/releases/whatsnew2320.md7.3 KB
  • references/releases/whatsnew24.md11.0 KB
  • references/releases/whatsnew2420.md10.4 KB
  • references/serialization/README.md3.2 KB
  • references/serialization/serialization-cbor.md3.8 KB
  • references/serialization/serialization-configure-json-serialization.md1.8 KB
  • references/serialization/serialization-create-and-use-serializers.md12.6 KB
  • references/serialization/serialization-custom-formats.md7.9 KB
  • references/serialization/serialization-customization-options.md5.9 KB
  • references/serialization/serialization-get-started.md5.0 KB
  • references/serialization/serialization-json-configuration.md6.2 KB
  • references/serialization/serialization-json-elements.md3.5 KB
  • references/serialization/serialization-json-io-sources.md3.5 KB
  • references/serialization/serialization-polymorphism.md7.1 KB
  • references/serialization/serialization-protobuf.md4.6 KB
  • references/serialization/serialization-serialize-builtin-types.md2.9 KB
  • references/serialization/serialization-transform-json.md5.7 KB
  • references/serialization/serialization.md2.4 KB
  • references/stdlib/metadata-jvm.md6.0 KB
  • references/stdlib/opt-in-requirements.md3.7 KB
  • references/stdlib/read-standard-input.md1.8 KB
  • references/stdlib/README.md1.5 KB
  • references/stdlib/reflection.md5.6 KB
  • references/stdlib/scope-functions.md3.7 KB
  • references/stdlib/time-measurement.md4.4 KB
  • references/stdlib/uuids.md3.4 KB
  • references/types/arrays.md6.7 KB
  • references/types/booleans.md2.1 KB
  • references/types/characters.md2.7 KB
  • references/types/generics.md7.6 KB
  • references/types/numbers.md7.9 KB
  • references/types/README.md1.5 KB
  • references/types/strings.md5.3 KB
  • references/types/type-aliases.md3.2 KB
  • references/types/typecasts.md6.8 KB
  • references/types/types-overview.md2.6 KB
  • references/types/unsigned-integer-types.md3.5 KB
  • samples/collections-list-set-map.md1.5 KB
  • samples/control-flow-when.md961 B
  • samples/coroutines-cancellation.md2.6 KB
  • samples/coroutines-structured-concurrency.md2.5 KB
  • samples/enum-classes.md1.2 KB
  • samples/extension-functions.md1.2 KB
  • samples/flow-collect-and-cancel.md3.2 KB
  • samples/flow-error-handling.md2.5 KB
  • samples/functions-named-default-arguments.md1.2 KB
  • samples/gradle-jvm-project.md1.8 KB
  • samples/idioms-null-handling-expressions.md1.7 KB
  • samples/junit-kotlin-tests-gradle.md2.8 KB
  • samples/lambdas-with-receiver-dsl.md1.2 KB
  • samples/maven-kotlin-test-surefire-failsafe.md1.6 KB
  • samples/null-safety-patterns.md1.3 KB
  • samples/object-declarations-companion.md2.4 KB
  • samples/open-classes-inheritance.md1.9 KB
  • samples/README.md4.4 KB
  • samples/scope-functions.md1.8 KB
  • samples/sealed-class-when.md1.8 KB
  • samples/serialization-json-roundtrip.md1.5 KB
  • samples/serialization-json-streams.md1.8 KB
  • samples/serialization-polymorphism.md2.8 KB
  • scripts/compiler-plugins.md2.1 KB
  • scripts/gradle.md3.7 KB
  • scripts/install.md1.5 KB
  • scripts/kotlin-daemon.md1.6 KB
  • scripts/kotlinc.md3.0 KB
  • scripts/ksp.md3.4 KB
  • scripts/maven.md1.5 KB
  • scripts/README.md1.1 KB

SKILL.md(原文)

安装前可以查看交给 AI 代理的指令内容。

Kotlin

対象バージョン

対象版備考
Kotlin2.4.21(2026-10-08、languageVersion / apiVersion 2.4)docs/v.list で確認
kotlinx.coroutines1.11.0
kotlinx.serialization1.11.0
KSP2.3.10
  • 取得日: 2026-10-16
  • 本文の一次ソース: kotlinlang.org/docs/llms.txt が列挙する Markdown twin https://kotlinlang.org/docs/_llms/<slug>.txt(例: basic-syntax.txt)。URL に版が無いため取得日を記録
  • 照合用の原本
    • Kotlin 本体ドキュメント: JetBrains/kotlin-web-site commit 0b10373a150997e9fbcd730a7e00ae8444cc8606(リリースタグが無いため SHA で pin)
    • kotlinx.coroutines: Kotlin/kotlinx.coroutines commit 7e0d1b3e9ca83652427ae00dda7d1673f058a743(サイトは master から生成され、タグ 1.11.0 の docs は古い構成のため。保存した 14 件に 1.12 / EAP の記述は 0 件)
    • kotlinx.serialization: Writerside ソースが公開されていないため twin のみ。補助として GitHub ガイドをタグ v1.11.0 で保存
  • 除外した版: Kotlin 2.5.0-Beta1、kotlinx.serialization 1.12.0-RC

ディレクトリ構成

skills/kotlin/
  SKILL.md
  references/
    basics/                 # 構文・null safety・制御フロー・例外・KDoc・可視性(14 ページ)
      README.md
      basic-syntax.md  null-safety.md  control-flow.md  exceptions.md
      idioms.md  kotlin-doc.md  annotations.md  visibility-modifiers.md ...
    types/                  # 型システム(10 ページ)
      README.md
      numbers.md  strings.md  arrays.md  generics.md  typecasts.md  type-aliases.md ...
    classes-objects/        # クラス・オブジェクト(15 ページ)
      README.md
      classes.md  data-classes.md  sealed-classes.md  interfaces.md  extensions.md
      delegated-properties.md  object-declarations.md  inline-classes.md ...
    functions/              # 関数・ラムダ・DSL(8 ページ)
      README.md
      functions.md  lambdas.md  inline-functions.md  context-parameters.md
      type-safe-builders.md  operator-overloading.md ...
    collections/            # コレクション・シーケンス・Range(18 ページ)
      README.md
      collections-overview.md  collection-operations.md  sequences.md  ranges.md ...
    stdlib/                 # 標準ライブラリ補足(7 ページ)
      README.md
      scope-functions.md  opt-in-requirements.md  reflection.md  time-measurement.md  uuids.md ...
    java-interop/           # Java 相互運用(7 ページ)
      README.md
      java-interop.md  java-to-kotlin-interop.md  jvm-records.md ...
    coroutines/             # kotlinx.coroutines(14 ページ)
      README.md
      coroutines-basics.md  coroutines-flow.md  channels.md  exception-handling.md ...
    serialization/          # kotlinx.serialization(14 ページ)
      README.md
      serialization-get-started.md  serialization-configure-json-serialization.md
      serialization-polymorphism.md  serialization-protobuf.md ...
    build-tools/            # Gradle・Maven・Kotlin daemon(14 ページ)
      README.md
      gradle-configure-project.md  gradle-compiler-options.md  maven-configure-project.md ...
    compiler/               # コンパイラ・K2・コンパイラプラグイン・KSP・kapt(23 ページ)
      README.md
      compiler-reference.md  k2-compiler-migration-guide.md  ksp-overview.md  ksp-quickstart.md  kapt.md ...
    releases/               # リリース・互換性・What's new(10 ページ)
      README.md
      whatsnew24.md  whatsnew2420.md  compatibility-guide-24.md  components-stability.md ...
  samples/                  # 動く実例 22 件
    README.md
    null-safety-patterns.md  sealed-class-when.md  scope-functions.md
    coroutines-structured-concurrency.md  flow-collect-and-cancel.md
    serialization-json-roundtrip.md  gradle-jvm-project.md ...
  scripts/                  # コマンド集 7 件
    README.md
    install.md  kotlinc.md  gradle.md  maven.md  kotlin-daemon.md  ksp.md  compiler-plugins.md

探索手順

タスクからカテゴリを引き、カテゴリの README.md で目的のページを特定する。

  1. 下記マッピング表でタスクに対応するカテゴリを探す
  2. そのカテゴリの references/{category}/README.md を参照して目的のページを特定する
  3. 該当ページの .md を Read して詳細を確認する
  4. 動く例が必要なら samples/README.md、実行コマンドが必要なら scripts/README.md を引く

タスク → カテゴリ マッピング

タスクカテゴリ参照 README
基本構文・null safety・if / when / for・例外処理・可視性・KDoc を知りたいbasicsreferences/basics/README.md
数値・String・Array・ジェネリクス・型キャスト・typealias を知りたいtypesreferences/types/README.md
class・data class・sealed class・interface・拡張・委譲・object を知りたいclasses-objectsreferences/classes-objects/README.md
関数・ラムダ・inline・context parameters・DSL ビルダー・演算子オーバーロードfunctionsreferences/functions/README.md
List / Set / Map の操作・変換・フィルタ・Sequence・Rangecollectionsreferences/collections/README.md
スコープ関数・opt-in・リフレクション・Duration・Uuid・標準入力stdlibreferences/stdlib/README.md
Java との相互運用・Java record・Java コレクションとの違いjava-interopreferences/java-interop/README.md
suspend 関数・launch / async・Flow・Channel・キャンセル・例外coroutinesreferences/coroutines/README.md
JSON / ProtoBuf / CBOR シリアライズ・カスタムシリアライザ・ポリモーフィズムserializationreferences/serialization/README.md
Gradle / Maven 設定・コンパイラオプション・Kotlin daemonbuild-toolsreferences/build-tools/README.md
コンパイラオプション・K2 移行・KSP・kapt・all-open / no-arg 等のプラグインcompilerreferences/compiler/README.md
新バージョンの変更点・互換性ガイド・コンポーネント安定性releasesreferences/releases/README.md
典型的な使い方を知りたいsamplessamples/README.md
インストール・CLI コマンドを知りたいscriptsscripts/README.md

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