fix: stabilize configuration editor completion

web/workspace/test/config-source/editor-state.test.ts

@@ -1,3 +1,4 @@
+import denoConfig from "../../deno.json" with { type: "json" };
 import { CODEMIRROR_VITE_DEDUPE } from "../../src/lib/workspace/config-source/vite-dedupe.ts";
 
 declare const Deno: {
@@ -24,6 +25,13 @@ Deno.test("Vite deduplicates CodeMirror stateful packages", () => {
       `Vite must deduplicate ${packageName}`,
     );
   }
+
+  for (const packageName of CODEMIRROR_VITE_DEDUPE) {
+    assert(
+      packageName in (denoConfig.imports ?? {}),
+      `${packageName} must be a direct dependency so Vite can deduplicate it`,
+    );
+  }
 });
 
 Deno.test("config editor snapshots Svelte proxies before cloning baselines", async () => {
@@ -92,11 +100,15 @@ Deno.test("Decodal editor follows readonly prop changes after mount", async () =
     "CodeMirror theme must use workspace tokens that actually exist",
   );
   assert(
-    source.includes("keymap.of(completionKeymap)") &&
+    source.includes("keymap.of(completionKeymapWithoutEnter)") &&
+      source.includes("binding.key !== 'Enter'") &&
+      source.includes("activateOnTyping: false") &&
+      source.includes("shouldStartCompletionAfterTyping(insertedText)") &&
       source.includes("startCompletion(editor)") &&
-      source.includes("update.selectionSet && !update.docChanged") &&
+      !source.includes("EditorView.domEventHandlers") &&
+      !source.includes("update.selectionSet") &&
       source.includes("completionStatus(editor.state) === null"),
-    "completion should be explicitly available and start when an editable cursor moves into an empty schema position",
+    "completion should start only after non-whitespace typing, without using focus, cursor movement, Space, or Enter",
   );
   assert(
     source.includes("fixedSchemaWrapperCompartment.reconfigure") &&

web/workspace/test/config-source/toolchain.test.ts

@@ -3,7 +3,10 @@ declare const Deno: {
   readTextFile(path: URL): Promise<string>;
 };
 
-import { toCodeMirrorCompletion } from "../../src/lib/workspace/config-source/completion.ts";
+import {
+  shouldStartCompletionAfterTyping,
+  toCodeMirrorCompletion,
+} from "../../src/lib/workspace/config-source/completion.ts";
 import { jsonWorkerMessage } from "../../src/lib/workspace/config-source/toolchain-message.ts";
 
 function assert(condition: unknown, message: string): asserts condition {
@@ -67,6 +70,25 @@ Deno.test("toolchain converts reactive-like proxies to plain Worker messages", a
   );
 });
 
+Deno.test("completion starts only after non-whitespace typing", () => {
+  assert(
+    !shouldStartCompletionAfterTyping(" "),
+    "Space should not start completion",
+  );
+  assert(
+    !shouldStartCompletionAfterTyping("\n"),
+    "Enter should not start completion",
+  );
+  assert(
+    !shouldStartCompletionAfterTyping("\t"),
+    "other whitespace should not start completion",
+  );
+  assert(
+    shouldStartCompletionAfterTyping("p"),
+    "non-whitespace typing should start completion",
+  );
+});
+
 Deno.test("toolchain preserves WASM UTF-16 completion ranges for CodeMirror", () => {
   const result = toCodeMirrorCompletion({
     from: "let 名 = ".length,