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tools/vscode-gotlin/README.md

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+# vscode-gotlin
+
+Minimal VS Code extension for `.gt` files.
+
+It does two things:
+
+- registers `.gt` as the `gotlin` language
+- launches `gotlin-lsp` over stdio
+
+It also includes:
+
+- syntax highlighting
+- bracket/comment configuration
+- basic Gotlin snippets
+- optional `gopls` bridge for hover/definition on Go-imported symbols
+
+## Setup
+
+From this folder:
+
+```bash
+npm install
+npm run build
+```
+
+Then in VS Code:
+
+1. Open this folder as an extension project.
+2. Press `F5` to launch an Extension Development Host.
+3. Open your Gotlin workspace in that host.
+
+## Server path
+
+By default the extension looks for:
+
+```text
+<workspace>/bin/gotlin-lsp
+```
+
+If your binary lives somewhere else, set:
+
+```json
+"gotlin.serverPath": "/absolute/path/to/gotlin-lsp"
+```
+
+If `gopls` is not on your PATH, also set:
+
+```json
+"gotlin.goplsPath": "/absolute/path/to/gopls"
+```
+
+## Build the language server
+
+From the repo root:
+
+```bash
+go build -o ./bin/gotlin-lsp ./cmd/gotlin-lsp
+```