Kotlin LSP
Use kotlin-lsp for Kotlin code navigation and diagnostics in Codex. Supported source extensions are .kt, .kts.
Prerequisites
- Node.js 22 or newer on the Codex host's PATH.
- Install the official standalone Kotlin LSP. Check the release notes for its bundled or required runtime. Put
kotlin-lspor the newerintellij-serverexecutable on PATH. The bridge passes--stdio. Language-server documentation
Use in Codex
After adding the marketplace, install this plugin and start a new Codex conversation.
codex plugin add 'kotlin-lsp@codex-plugin-ports'
Ask Codex to use the kotlin-lsp language-server tools for your project. Call lsp_start with the absolute project root and poll lsp_status if initialization is pending. Queries use saved files and zero-based UTF-16 positions. The available features and indexing behavior depend on the native server.
Open trusted workspaces. A native language server can run build or project tools while indexing. Stop the workspace with lsp_stop when you finish or before starting another workspace.
Upstream and changes
Adapted from Anthropic's kotlin-lsp under the Apache License 2.0. This port keeps the upstream file mappings and uses a local MCP bridge to start the language server and query it from Codex.