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tools/oxlint/anti-slop/effect/rules/no-service-constructor-imports.ts

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+import { defineRule } from "@oxlint/plugins";
+
+import type { ESTree } from "@oxlint/plugins";
+
+const SERVICE_CONSTRUCTOR_NAME = /^make[A-Z]/u;
+const TEST_FILE = /\.(?:test|spec)\.[cm]?[jt]sx?$/u;
+
+function isProjectLocalImport(source: string): boolean {
+	return source.startsWith("./") || source.startsWith("../");
+}
+
+function getImportedName(specifier: ESTree.ImportSpecifier): string {
+	if (specifier.imported.type === "Identifier") return specifier.imported.name;
+	return specifier.imported.value;
+}
+
+/** Keep dependency-bearing Effect service constructors local to their owning capability modules. */
+export const noServiceConstructorImportsRule = defineRule({
+	meta: {
+		type: "problem",
+		docs: {
+			description:
+				"Disallow project-local make<CapabilityName> imports outside test and spec files.",
+		},
+		messages: {
+			serviceConstructorImport:
+				'Do not import Effect service constructor "{{name}}" into runtime code. Import the owning Layer, yield the contextual service, and allow its requirements to propagate to the composition root.',
+		},
+	},
+	create(context) {
+		const isTestFile = TEST_FILE.test(context.filename.replaceAll("\\", "/"));
+
+		return {
+			ImportDeclaration(node) {
+				if (isTestFile || !isProjectLocalImport(node.source.value)) return;
+
+				for (const specifier of node.specifiers) {
+					if (specifier.type !== "ImportSpecifier") continue;
+
+					const importedName = getImportedName(specifier);
+					if (!SERVICE_CONSTRUCTOR_NAME.test(importedName)) continue;
+
+					context.report({
+						node: specifier,
+						messageId: "serviceConstructorImport",
+						data: { name: importedName },
+					});
+				}
+			},
+		};
+	},
+});