diff --git a/node/package.json b/node/package.json
index 6371344c..132eecad 100644
--- a/node/package.json
+++ b/node/package.json
@@ -1,7 +1,7 @@
 {
   "name": "wasm",
   "description": "Cucumber Language server using tree-sitter node bindings",
-  "main": "../dist/cjs/src/node/startNodeServer.js",
-  "module": "../dist/esm/src/node/startNodeServer.js",
-  "types": "../dist/esm/src/node/startNodeServer.d.ts"
+  "main": "../dist/cjs/src/node/index.js",
+  "module": "../dist/esm/src/node/index.js",
+  "types": "../dist/esm/src/node/index.d.ts"
 }
diff --git a/package.json b/package.json
index 136285db..8075e14b 100644
--- a/package.json
+++ b/package.json
@@ -3,17 +3,21 @@
   "version": "0.12.14",
   "description": "Cucumber Language Server",
   "type": "module",
-  "main": "dist/cjs/src/node/startNodeServer.js",
-  "module": "dist/esm/src/node/startNodeServer.js",
-  "types": "dist/esm/src/node/startNodeServer.d.ts",
+  "main": "dist/cjs/src/index.js",
+  "module": "dist/esm/src/index.js",
+  "types": "dist/esm/src/index.d.ts",
   "exports": {
     ".": {
-      "import": "./dist/esm/src/node/startNodeServer.js",
-      "require": "./dist/cjs/src/node/startNodeServer.js"
+      "import": "./dist/esm/src/index.js",
+      "require": "./dist/cjs/src/index.js"
+    },
+    "./node": {
+      "import": "./dist/esm/src/node/index.js",
+      "require": "./dist/cjs/src/node/index.js"
     },
     "./wasm": {
-      "import": "./dist/esm/src/wasm/startWasmServer.js",
-      "require": "./dist/cjs/src/wasm/startWasmServer.js"
+      "import": "./dist/esm/src/wasm/index.js",
+      "require": "./dist/cjs/src/wasm/index.js"
     }
   },
   "files": [
diff --git a/src/CucumberLanguageServer.ts b/src/CucumberLanguageServer.ts
index bad8f2fd..6f527175 100644
--- a/src/CucumberLanguageServer.ts
+++ b/src/CucumberLanguageServer.ts
@@ -12,10 +12,8 @@ import {
   jsSearchIndex,
   ParserAdapter,
   semanticTokenTypes,
+  Suggestion,
 } from '@cucumber/language-service'
-import { stat as statCb } from 'fs'
-import { extname, relative } from 'path'
-import { promisify } from 'util'
 import {
   CodeAction,
   CodeActionKind,
@@ -29,13 +27,12 @@ import {
 import { TextDocument } from 'vscode-languageserver-textdocument'
 
 import { buildStepTexts } from './buildStepTexts.js'
+import { extname, Files } from './Files'
 import { getLanguage, loadGherkinSources, loadGlueSources } from './fs.js'
 import { getStepDefinitionSnippetLinks } from './getStepDefinitionSnippetLinks.js'
 import { Settings } from './types.js'
 import { version } from './version.js'
 
-const stat = promisify(statCb)
-
 type ServerInfo = {
   name: string
   version: string
@@ -84,14 +81,23 @@ export class CucumberLanguageServer {
   private expressionBuilderResult: ExpressionBuilderResult | undefined = undefined
   private reindexingTimeout: NodeJS.Timeout
   private rootPath: string
+  #suggestions: readonly Suggestion[]
+  #files: Files
+
+  get suggestions() {
+    return this.#suggestions
+  }
 
   constructor(
     private readonly connection: Connection,
     private readonly documents: TextDocuments<TextDocument>,
-    parserAdapter: ParserAdapter
+    parserAdapter: ParserAdapter,
+    private readonly makeFiles: (rootUri: string) => Files
   ) {
     this.expressionBuilder = new ExpressionBuilder(parserAdapter)
+
     connection.onInitialize(async (params) => {
+      // connection.console.log(`PARAMS: ${JSON.stringify(params, null, 2)}`)
       await parserAdapter.init()
       if (params.clientInfo) {
         connection.console.info(
@@ -103,11 +109,14 @@ export class CucumberLanguageServer {
 
       if (params.rootPath) {
         this.rootPath = params.rootPath
+      } else if (params.rootUri) {
+        this.rootPath = new URL(params.rootUri).pathname
       } else if (params.workspaceFolders && params.workspaceFolders.length > 0) {
         this.rootPath = new URL(params.workspaceFolders[0].uri).pathname
       } else {
-        connection.console.error(`Client did not send rootPath or workspaceFolders`)
+        connection.console.error(`Could not determine rootPath`)
       }
+      this.#files = makeFiles(this.rootPath)
       // Some users have reported that the globs don't find any files. This is to debug that issue
       connection.console.info(`Root path   : ${this.rootPath}`)
       connection.console.info(`Current dir : ${process.cwd()}`)
@@ -211,13 +220,8 @@ export class CucumberLanguageServer {
                 return []
               }
               const mustacheTemplate = settings.snippetTemplates[languageName]
-              let createFile = false
-              try {
-                await stat(new URL(link.targetUri))
-              } catch {
-                createFile = true
-              }
-              const relativePath = relative(this.rootPath, new URL(link.targetUri).pathname)
+              const createFile = !(await this.#files.exists(link.targetUri))
+              const relativePath = this.#files.relative(link.targetUri)
               const codeAction = getGenerateSnippetCodeAction(
                 diagnostics,
                 link,
@@ -377,8 +381,8 @@ export class CucumberLanguageServer {
     // TODO: Send WorkDoneProgressBegin notification
     // https://microsoft.github.io/language-server-protocol/specifications/specification-3-17/#workDoneProgress
 
-    this.connection.console.info(`Reindexing...`)
-    const gherkinSources = await loadGherkinSources(settings.features)
+    this.connection.console.info(`Reindexing ${this.rootPath}`)
+    const gherkinSources = await loadGherkinSources(this.#files, settings.features)
     this.connection.console.info(
       `* Found ${gherkinSources.length} feature file(s) in ${JSON.stringify(settings.features)}`
     )
@@ -387,7 +391,7 @@ export class CucumberLanguageServer {
       []
     )
     this.connection.console.info(`* Found ${stepTexts.length} steps in those feature files`)
-    const glueSources = await loadGlueSources(settings.glue)
+    const glueSources = await loadGlueSources(this.#files, settings.glue)
     this.connection.console.info(
       `* Found ${glueSources.length} glue file(s) in ${JSON.stringify(settings.glue)}`
     )
@@ -423,13 +427,15 @@ export class CucumberLanguageServer {
     this.connection.languages.semanticTokens.refresh()
 
     try {
-      const suggestions = buildSuggestions(
+      this.#suggestions = buildSuggestions(
         this.expressionBuilderResult.registry,
         stepTexts,
         this.expressionBuilderResult.expressionLinks.map((l) => l.expression)
       )
-      this.connection.console.info(`* Built ${suggestions.length} suggestions for auto complete`)
-      this.searchIndex = jsSearchIndex(suggestions)
+      this.connection.console.info(
+        `* Built ${this.#suggestions.length} suggestions for auto complete`
+      )
+      this.searchIndex = jsSearchIndex(this.#suggestions)
     } catch (err) {
       this.connection.console.error(err.stack)
       this.connection.console.error(
diff --git a/src/Files.ts b/src/Files.ts
new file mode 100644
index 00000000..cb22384e
--- /dev/null
+++ b/src/Files.ts
@@ -0,0 +1,13 @@
+export interface Files {
+  exists(uri: string): Promise<boolean>
+  readFile(path: string): Promise<string>
+  findFiles(glob: string): Promise<readonly string[]>
+  join(...paths: string[]): string
+  relative(uri: string): string
+  toUri(path: string): string
+}
+
+export function extname(path: string): string {
+  // Roughly-enough implements https://nodejs.org/dist/latest-v18.x/docs/api/path.html#pathextnamepath
+  return path.substring(path.lastIndexOf('.'), path.length) || ''
+}
diff --git a/src/fs.ts b/src/fs.ts
index d5240bdf..f3be24a9 100644
--- a/src/fs.ts
+++ b/src/fs.ts
@@ -1,8 +1,6 @@
 import { LanguageName, Source } from '@cucumber/language-service'
-import fg from 'fast-glob'
-import fs from 'fs/promises'
-import { extname, resolve as resolvePath } from 'path'
-import url from 'url'
+
+import { extname, Files } from './Files'
 
 export const glueExtByLanguageName: Record<LanguageName, string[]> = {
   tsx: ['.ts', '.tsx'],
@@ -25,9 +23,10 @@ const glueLanguageNameByExt = Object.fromEntries<LanguageName>(entries)
 const glueExtensions = new Set(Object.keys(glueLanguageNameByExt))
 
 export async function loadGlueSources(
+  files: Files,
   globs: readonly string[]
 ): Promise<readonly Source<LanguageName>[]> {
-  return loadSources(globs, glueExtensions, glueLanguageNameByExt)
+  return loadSources(files, globs, glueExtensions, glueLanguageNameByExt)
 }
 
 export function getLanguage(ext: string): LanguageName | undefined {
@@ -35,28 +34,36 @@ export function getLanguage(ext: string): LanguageName | undefined {
 }
 
 export async function loadGherkinSources(
+  files: Files,
   globs: readonly string[]
 ): Promise<readonly Source<'gherkin'>[]> {
-  return loadSources(globs, new Set(['.feature']), { '.feature': 'gherkin' })
+  return loadSources(files, globs, new Set(['.feature']), { '.feature': 'gherkin' })
 }
 
 type LanguageNameByExt<L> = Record<string, L>
 
-export async function findPaths(globs: readonly string[]): Promise<readonly string[]> {
-  const pathPromises = globs.reduce<readonly Promise<string[]>[]>((prev, glob) => {
-    return prev.concat(fg(glob, { caseSensitiveMatch: false, onlyFiles: true }))
+export async function findPaths(
+  files: Files,
+  globs: readonly string[]
+): Promise<readonly string[]> {
+  // Run all the globs in parallel
+  const pathsPromises = globs.reduce<readonly Promise<readonly string[]>[]>((prev, glob) => {
+    const pathsPromise = files.findFiles(glob)
+    return prev.concat(pathsPromise)
   }, [])
-  const pathArrays = await Promise.all(pathPromises)
+  const pathArrays = await Promise.all(pathsPromises)
+  // Flatten them all
   const paths = pathArrays.flatMap((paths) => paths)
   return [...new Set(paths).values()].sort()
 }
 
 async function loadSources<L>(
+  files: Files,
   globs: readonly string[],
   extensions: Set<string>,
   languageNameByExt: LanguageNameByExt<L>
 ): Promise<readonly Source<L>[]> {
-  const paths = await findPaths(globs)
+  const paths = await findPaths(files, globs)
 
   return Promise.all(
     paths
@@ -65,11 +72,11 @@ async function loadSources<L>(
         (path) =>
           new Promise<Source<L>>((resolve) => {
             const languageName = languageNameByExt[extname(path)]
-            return fs.readFile(path, 'utf-8').then((content) =>
+            return files.readFile(path).then((content) =>
               resolve({
                 languageName,
                 content,
-                uri: url.pathToFileURL(resolvePath(path)).href,
+                uri: files.toUri(path),
               })
             )
           })
diff --git a/src/index.ts b/src/index.ts
new file mode 100644
index 00000000..7a204f42
--- /dev/null
+++ b/src/index.ts
@@ -0,0 +1,3 @@
+export * from './Files.js'
+export * from './newWasmServer.js'
+export * from './startServer.js'
diff --git a/src/newWasmServer.ts b/src/newWasmServer.ts
new file mode 100644
index 00000000..fd68bf2b
--- /dev/null
+++ b/src/newWasmServer.ts
@@ -0,0 +1,30 @@
+import { ParserAdapter } from '@cucumber/language-service'
+import { WasmParserAdapter } from '@cucumber/language-service/wasm'
+import { PassThrough } from 'stream'
+import { TextDocuments } from 'vscode-languageserver'
+import { createConnection } from 'vscode-languageserver/node'
+import { TextDocument } from 'vscode-languageserver-textdocument'
+
+import { CucumberLanguageServer } from './CucumberLanguageServer.js'
+import { Files } from './Files'
+
+export type StreamInfo = {
+  writer: NodeJS.WritableStream
+  reader: NodeJS.ReadableStream
+}
+
+export function newWasmServer(wasmBaseUrl: string, makeFiles: (rootUri: string) => Files) {
+  const adapter: ParserAdapter = new WasmParserAdapter(wasmBaseUrl)
+  const inputStream = new PassThrough()
+  const outputStream = new PassThrough()
+
+  const connection = createConnection(inputStream, outputStream)
+  const documents = new TextDocuments(TextDocument)
+  new CucumberLanguageServer(connection, documents, adapter, makeFiles)
+  connection.listen()
+
+  return {
+    writer: inputStream,
+    reader: outputStream,
+  }
+}
diff --git a/src/node/NodeFiles.ts b/src/node/NodeFiles.ts
new file mode 100644
index 00000000..ef2e650c
--- /dev/null
+++ b/src/node/NodeFiles.ts
@@ -0,0 +1,39 @@
+import fg from 'fast-glob'
+import fs from 'fs/promises'
+import path, { relative, resolve as resolvePath } from 'path'
+import url from 'url'
+
+import { Files } from '../Files'
+
+export class NodeFiles implements Files {
+  constructor(private readonly rootUri: string) {}
+
+  async exists(uri: string): Promise<boolean> {
+    try {
+      await fs.stat(new URL(uri))
+      return true
+    } catch {
+      return false
+    }
+  }
+
+  readFile(path: string): Promise<string> {
+    return fs.readFile(path, 'utf-8')
+  }
+
+  findFiles(glob: string): Promise<readonly string[]> {
+    return fg(glob, { cwd: this.rootUri, caseSensitiveMatch: false, onlyFiles: true })
+  }
+
+  join(...paths: string[]): string {
+    return path.join(this.rootUri, ...paths)
+  }
+
+  relative(uri: string): string {
+    return relative(this.rootUri, new URL(uri).pathname)
+  }
+
+  toUri(path: string): string {
+    return url.pathToFileURL(resolvePath(path)).href
+  }
+}
diff --git a/src/node/index.ts b/src/node/index.ts
new file mode 100644
index 00000000..9eab3403
--- /dev/null
+++ b/src/node/index.ts
@@ -0,0 +1,2 @@
+export * from './NodeFiles.js'
+export * from './startNodeServer.js'
diff --git a/src/node/startNodeServer.ts b/src/node/startNodeServer.ts
index 7f23f3c9..451b3474 100644
--- a/src/node/startNodeServer.ts
+++ b/src/node/startNodeServer.ts
@@ -1,7 +1,8 @@
 import { NodeParserAdapter } from '@cucumber/language-service/node'
 
-import { startServer } from '../startServer'
+import { startServer } from '../startServer.js'
+import { NodeFiles } from './NodeFiles'
 
 export function startNodeServer() {
-  startServer(new NodeParserAdapter())
+  startServer(new NodeParserAdapter(), (rootUri) => new NodeFiles(rootUri))
 }
diff --git a/src/startServer.ts b/src/startServer.ts
index 4b4d4e15..cc2fe741 100644
--- a/src/startServer.ts
+++ b/src/startServer.ts
@@ -4,12 +4,13 @@ import { createConnection, ProposedFeatures } from 'vscode-languageserver/node'
 import { TextDocument } from 'vscode-languageserver-textdocument'
 
 import { CucumberLanguageServer } from './CucumberLanguageServer.js'
+import { Files } from './Files'
 import { version } from './version.js'
 
-export function startServer(adapter: ParserAdapter) {
+export function startServer(adapter: ParserAdapter, makeFiles: (rootUri: string) => Files) {
   const connection = createConnection(ProposedFeatures.all)
   const documents = new TextDocuments(TextDocument)
-  new CucumberLanguageServer(connection, documents, adapter)
+  new CucumberLanguageServer(connection, documents, adapter, makeFiles)
   connection.listen()
 
   // Don't die on unhandled Promise rejections
diff --git a/src/wasm/index.ts b/src/wasm/index.ts
new file mode 100644
index 00000000..ce2a0b39
--- /dev/null
+++ b/src/wasm/index.ts
@@ -0,0 +1 @@
+export * from './startWasmServer.js'
diff --git a/src/wasm/startWasmServer.ts b/src/wasm/startWasmServer.ts
index 6c3097d5..d540d525 100644
--- a/src/wasm/startWasmServer.ts
+++ b/src/wasm/startWasmServer.ts
@@ -1,7 +1,8 @@
 import { WasmParserAdapter } from '@cucumber/language-service/wasm'
 
-import { startServer } from '../startServer'
+import { Files } from '../Files'
+import { startServer } from '../startServer.js'
 
-export function startWasmServer(wasmBaseUrl: string) {
-  startServer(new WasmParserAdapter(wasmBaseUrl))
+export function startWasmServer(wasmBaseUrl: string, makeFiles: (rootUri: string) => Files) {
+  startServer(new WasmParserAdapter(wasmBaseUrl), makeFiles)
 }
diff --git a/test/CucumberLanguageServer.test.ts b/test/CucumberLanguageServer.test.ts
index 9b9a4aea..597e9d95 100644
--- a/test/CucumberLanguageServer.test.ts
+++ b/test/CucumberLanguageServer.test.ts
@@ -23,6 +23,7 @@ import { TextDocument } from 'vscode-languageserver-textdocument'
 import { CompletionItem, CompletionItemKind } from 'vscode-languageserver-types'
 
 import { CucumberLanguageServer } from '../src/CucumberLanguageServer.js'
+import { NodeFiles } from '../src/node/NodeFiles'
 import { Settings } from '../src/types'
 
 describe('CucumberLanguageServer', () => {
@@ -35,28 +36,14 @@ describe('CucumberLanguageServer', () => {
   beforeEach(async () => {
     inputStream = new TestStream()
     outputStream = new TestStream()
-    const logger = new NullLogger()
-    clientConnection = createProtocolConnection(
-      new StreamMessageReader(outputStream),
-      new StreamMessageWriter(inputStream),
-      logger
-    )
-    clientConnection.onError((err) => {
-      console.error('ERROR', err)
-    })
-    // Ignore log messages
-    clientConnection.onNotification(LogMessageNotification.type, () => undefined)
-    clientConnection.onUnhandledNotification((n) => {
-      console.error('Unhandled notification', n)
-    })
-    clientConnection.listen()
     serverConnection = createConnection(inputStream, outputStream)
     documents = new TextDocuments(TextDocument)
 
     new CucumberLanguageServer(
       serverConnection,
       documents,
-      new WasmParserAdapter('node_modules/@cucumber/language-service/dist')
+      new WasmParserAdapter('node_modules/@cucumber/language-service/dist'),
+      (rootUri) => new NodeFiles(rootUri)
     )
     serverConnection.listen()
 
@@ -92,6 +79,21 @@ describe('CucumberLanguageServer', () => {
       },
       workspaceFolders: null,
     }
+    const logger = new NullLogger()
+    clientConnection = createProtocolConnection(
+      new StreamMessageReader(outputStream),
+      new StreamMessageWriter(inputStream),
+      logger
+    )
+    clientConnection.onError((err) => {
+      console.error('ERROR', err)
+    })
+    // Ignore log messages
+    clientConnection.onNotification(LogMessageNotification.type, () => undefined)
+    clientConnection.onUnhandledNotification((n) => {
+      console.error('Unhandled notification', n)
+    })
+    clientConnection.listen()
     const { serverInfo } = await clientConnection.sendRequest(
       InitializeRequest.type,
       initializeParams
diff --git a/wasm/package.json b/wasm/package.json
index d81c77ce..248c3920 100644
--- a/wasm/package.json
+++ b/wasm/package.json
@@ -1,7 +1,7 @@
 {
   "name": "wasm",
   "description": "Cucumber Language server using tree-sitter wasm bindings",
-  "main": "../dist/cjs/src/wasm/startWasmServer.js",
-  "module": "../dist/esm/src/wasm/startWasmServer.js",
-  "types": "../dist/esm/src/wasm/startWasmServer.d.ts"
+  "main": "../dist/cjs/src/wasm/index.js",
+  "module": "../dist/esm/src/wasm/index.js",
+  "types": "../dist/esm/src/wasm/index.d.ts"
 }