kortex

Use when building, modifying, debugging, or reviewing Ktor 3.5.x server and client applications, including routing, requests/responses, plugins, serialization, authentication, sessions, WebSockets, SSE, engines, testing, deployment, and Kotlin multiplatform client work.

Use when fixing software issues in a repository, including bug reports, failing tests, CI failures, compile errors, runtime errors, regressions, dependency problems, and requests such as "fix this issue", "resolve this bug", "make tests pass", or "address the failure". Guides Codex through issue triage, reproduction, root-cause analysis, scoped implementation, verification, and final handoff.

Use when writing, reviewing, or modernizing Kotlin code with recent language versions (2.0–2.4.x, including 2.4.10 and 2.4.20-Beta1), including context parameters, collection literals, guard conditions in when, multi-dollar interpolation, non-local break/continue, explicit backing fields, nested type aliases, name-based destructuring, data objects, Enum.entries, rangeUntil, unused-return-value checker, K2 smart casts, contracts, experimental -X compiler flags, and stdlib APIs such as Uuid, Base64, HexFormat, kotlin.time Instant/Clock, and atomics.

Use when working with JetBrains Kotlin Toolchain v0.11.x, formerly Amper, including module.yaml, project.yaml, module templates, libs.versions.toml, the kotlin CLI wrapper, Kotlin/JVM, Android, iOS, Kotlin Multiplatform, Kotlin/JS, Kotlin/Wasm, Kotlin/Native, server-side apps, dependencies, testing, publishing, plugins, built-in technologies, Maven migration, and toolchain provisioning.

Use when creating, writing, or running standalone executable Kotlin scripts with the `.main.kts` extension, including the `kotlin` script runner, shebang execution, `@file:DependsOn`/`@file:Repository`/`@file:Import`/`@file:CompilerOptions`/`@file:OptIn` annotations, script dependencies, command-line `args`, compiled-script caching, and common scripting libraries such as ktor, kotlinx-serialization, kotlinx-coroutines, clikt, and kotlinx-html.