nes: fix: respect priority scale of [0, 1] (#400)

by converting importance that can be in [0, 100] to priority scale of [0, 1]

Author: ulugbekna

src/extension/languageContextProvider/vscode-node/languageContextProviderService.ts

@@ -67,15 +67,15 @@ export class LanguageContextProviderService extends Disposable implements ILangu
 				const ctx = item.context as Copilot.CodeSnippet;
 				return {
 					kind: ContextKind.Snippet,
-					priority: ctx.importance ? ctx.importance : 0,
+					priority: this.convertImportanceToPriority(ctx.importance),
 					uri: URI.parse(ctx.uri),
 					value: ctx.value
 				} satisfies SnippetContext;
 			} else {
 				const ctx = item.context as Copilot.Trait;
 				return {
 					kind: ContextKind.Trait,
-					priority: ctx.importance ? ctx.importance : 0,
+					priority: this.convertImportanceToPriority(ctx.importance),
 					name: ctx.name,
 					value: ctx.value,
 				} satisfies TraitContext;
@@ -85,6 +85,17 @@ export class LanguageContextProviderService extends Disposable implements ILangu
 		return contextItems;
 	}
 
+	// importance is coined by the copilot extension and must be an integer in [0, 100], while priority is by the chat extension and spans [0, 1]
+	private convertImportanceToPriority(importance: number | undefined): number {
+		if (importance === undefined || importance < 0) {
+			return 0;
+		}
+		if (importance > 100) {
+			return 1;
+		}
+		return importance / 100;
+	}
+
 	public getContextItemsOnTimeout(doc: TextDocument, request: Copilot.ResolveRequest): ContextItem[] {
 		return [];
 	}