feat(core-eslint): no-undeclared-audit rule

AST-aware ESLint rule that catches auditLog.record({ type: "X" }) calls
in use-case files where X is not declared in the matching
manifest.useCases[name].audits array.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-eslint/rules/no-undeclared-audit.test.js

@@ -0,0 +1,80 @@
+import { describe, it } from "vitest";
+import { RuleTester } from "eslint";
+import path from "node:path";
+import os from "node:os";
+import fs from "node:fs";
+import rule from "./no-undeclared-audit.js";
+
+function makeFixture({ manifestUseCases, useCaseBody }) {
+  const repoRoot = fs.mkdtempSync(path.join(os.tmpdir(), "nua-"));
+  const featureDir = path.join(repoRoot, "packages", "demo");
+  fs.mkdirSync(path.join(featureDir, "src", "application", "use-cases"), { recursive: true });
+  const useCasesObj = Object.entries(manifestUseCases)
+    .map(([name, uc]) =>
+      `    ${name}: { mutates: ${uc.mutates}, audits: [${uc.audits.map((a) => `"${a}"`).join(", ")}], publishes: [], consumes: [] },`,
+    )
+    .join("\n");
+  fs.writeFileSync(
+    path.join(featureDir, "src", "feature.manifest.ts"),
+    `export const demoManifest = defineFeature({
+  name: "demo",
+  requiredCores: [],
+  useCases: {
+${useCasesObj}
+  },
+  realtimeChannels: [],
+  jobs: [],
+} as const);`,
+  );
+  const useCaseFile = path.join(featureDir, "src", "application", "use-cases", "sign-up.use-case.ts");
+  fs.writeFileSync(useCaseFile, useCaseBody);
+  return { repoRoot, useCaseFile };
+}
+
+const tester = new RuleTester({
+  languageOptions: {
+    parser: await import("@typescript-eslint/parser"),
+    ecmaVersion: "latest",
+    sourceType: "module",
+  },
+});
+
+describe("no-undeclared-audit", () => {
+  it("passes when auditLog.record type matches manifest audits[]", () => {
+    const { repoRoot, useCaseFile } = makeFixture({
+      manifestUseCases: { signUp: { mutates: true, audits: ["user.created"] } },
+      useCaseBody: `export const signUpUseCase = (auditLog) => async () => { auditLog.record({ type: "user.created", subject: "x", actor: "y" }); };`,
+    });
+    tester.run("no-undeclared-audit", rule, {
+      valid: [{ filename: useCaseFile, code: fs.readFileSync(useCaseFile, "utf8"), options: [{ repoRoot }] }],
+      invalid: [],
+    });
+  });
+
+  it("fires when auditLog.record type is not in manifest", () => {
+    const { repoRoot, useCaseFile } = makeFixture({
+      manifestUseCases: { signUp: { mutates: true, audits: [] } },
+      useCaseBody: `export const signUpUseCase = (auditLog) => async () => { auditLog.record({ type: "user.created", subject: "x" }); };`,
+    });
+    tester.run("no-undeclared-audit", rule, {
+      valid: [],
+      invalid: [{
+        filename: useCaseFile,
+        code: fs.readFileSync(useCaseFile, "utf8"),
+        options: [{ repoRoot }],
+        errors: [{ messageId: "undeclared", data: { event: "user.created", useCase: "signUp" } }],
+      }],
+    });
+  });
+
+  it("is a no-op when auditLog.record is called with a non-literal type", () => {
+    const { repoRoot, useCaseFile } = makeFixture({
+      manifestUseCases: { signUp: { mutates: true, audits: [] } },
+      useCaseBody: `export const signUpUseCase = (auditLog, type) => async () => { auditLog.record({ type, subject: "x" }); };`,
+    });
+    tester.run("no-undeclared-audit", rule, {
+      valid: [{ filename: useCaseFile, code: fs.readFileSync(useCaseFile, "utf8"), options: [{ repoRoot }] }],
+      invalid: [],
+    });
+  });
+});