https://www.youngju.dev/blog 천천히 올바르게. AI Researcher & DevOps Engineer Youngju's tech blog. GPU/CUDA, LLM, MLOps, Kubernetes AI workloads, distributed training, and data engineering. ko fjvbn2003@gmail.com (Youngju Kim) fjvbn2003@gmail.com (Youngju Kim) Sat, 16 May 2026 00:00:00 GMT https://www.youngju.dev/blog/culture/2026-05-16-configuration-languages-2026-cue-pkl-apple-kcl-dhall-jsonnet-hcl-nix-starlark-deep-dive.en https://www.youngju.dev/blog/culture/2026-05-16-configuration-languages-2026-cue-pkl-apple-kcl-dhall-jsonnet-hcl-nix-starlark-deep-dive.en The 2026 configuration language landscape — CUE (Marcel van Lohuizen), Pkl (Apple, Feb 2024), KCL (Kusion Stack, CNCF Sandbox 2024), Dhall, Jsonnet (+ Sjsonnet / Tanka / Grafonnet), HCL (Terraform), Nix Lang / NixOS, Starlark (Bazel), TypeScript-as-config (Pulumi), and task runners Mage / Earthfile / Just / Taskfile. Why JSON/YAML are not enough, the 4-way split of data+constraints / functional / code-as-config / task runners, real-world adoption at Toss, Kakao, and Mercari, and what to pick per use case (k8s, build, multi-env, simple app) — a 17,000-word deep dive. Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) config-languageconfigurationcuepklkclkusiondhalljsonnettankagrafonnethclterraformnix-langnixosstarlarkbazelpulumimageearthfilejusttaskfile2026deep-diveenglish https://www.youngju.dev/blog/culture/2026-05-16-configuration-languages-2026-cue-pkl-apple-kcl-dhall-jsonnet-hcl-nix-starlark-deep-dive.ja https://www.youngju.dev/blog/culture/2026-05-16-configuration-languages-2026-cue-pkl-apple-kcl-dhall-jsonnet-hcl-nix-starlark-deep-dive.ja 2026年の設定言語の現在地 — CUE(Marcel van Lohuizen)、Pkl(Apple, 2024年2月)、KCL(Kusion Stack, CNCF Sandbox 2024)、Dhall、Jsonnet(+Sjsonnet / Tanka / Grafonnet)、HCL(Terraform)、Nix Lang / NixOS、Starlark(Bazel)、TypeScript-as-config(Pulumi)、タスクランナー Mage / Earthfile / Just / Taskfile まで。なぜ JSON/YAML では足りないのか、データ+制約 / 関数型 / コード / タスクランナーの4分類、Toss・カカオ・メルカリの実運用、k8s・ビルド・マルチ環境・小規模アプリ別の選び方を約17,000字で整理。 Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) config-languageconfigurationcuepklkclkusiondhalljsonnettankagrafonnethclterraformnix-langnixosstarlarkbazelpulumimageearthfilejusttaskfile2026deep-dive日本語 https://www.youngju.dev/blog/culture/2026-05-16-configuration-languages-2026-cue-pkl-apple-kcl-dhall-jsonnet-hcl-nix-starlark-deep-dive https://www.youngju.dev/blog/culture/2026-05-16-configuration-languages-2026-cue-pkl-apple-kcl-dhall-jsonnet-hcl-nix-starlark-deep-dive 2026년 설정 언어 전쟁 — CUE(Marcel van Lohuizen), Pkl(Apple 2024.2), KCL(Kusion Stack, CNCF Sandbox 2024), Dhall, Jsonnet(+Sjsonnet/Tanka/Grafonnet), HCL(Terraform), Nix Lang/NixOS, Starlark(Bazel), TypeScript-as-config(Pulumi), 그리고 태스크 러너 Mage/Earthfile/Just/Taskfile까지. JSON/YAML로는 왜 부족한지, 데이터+제약 통합 / 함수형 / 코드형 / 태스크 4분류, 토스·카카오·메르카리의 실제 운용 사례, k8s·빌드·멀티환경·단순앱 별로 무엇을 골라야 하는지 — 17,000자 깊이로 정리. Sat, 16 May 2026 00:00:00 GMT fjvbn2003@gmail.com (Youngju Kim) config-languageconfigurationcuepklkclkusiondhalljsonnettankagrafonnethclterraformnix-langnixosstarlarkbazelpulumimageearthfilejusttaskfile2026deep-dive