diff --git a/fixtures/bitvid/characterization-cases.json b/fixtures/bitvid/characterization-cases.json
new file mode 100644
index 0000000..10f5c10
--- /dev/null
+++ b/fixtures/bitvid/characterization-cases.json
@@ -0,0 +1,21 @@
+[
+  "personal-block-precedence",
+  "user-deny",
+  "event-deny",
+  "address-deny",
+  "allowlist-miss",
+  "protected-target",
+  "trusted-report-threshold-reached",
+  "duplicate-reporter-dedupe",
+  "blocked-reporter-ignored",
+  "trusted-mute-below-threshold",
+  "trusted-mute-at-threshold",
+  "expired-trusted-mute",
+  "viewer-override",
+  "author-override",
+  "cache-fallback-effective",
+  "report-category-thresholds",
+  "mute-aggregation-rules",
+  "hide-vs-restrict-vs-downrank",
+  "moderation-decorator-fields"
+]
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index e55c673..7291384 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1894,11 +1894,7 @@
       }
     },
     "packages/testing": {
-      "name": "@nostr-governance/testing",
-      "version": "0.1.0",
-      "dependencies": {
-        "@nostr-governance/core": "*"
-      }
+      "name": "@nostr-governance/testing"
     }
   }
 }
diff --git a/packages/testing/package.json b/packages/testing/package.json
index 1c6db95..9d7584b 100644
--- a/packages/testing/package.json
+++ b/packages/testing/package.json
@@ -1,20 +1,8 @@
 {
   "name": "@nostr-governance/testing",
-  "version": "0.1.0",
   "type": "module",
-  "main": "src/index.js",
-  "types": "dist/types/src/index.d.ts",
-  "files": ["src", "dist"],
-  "exports": {
-    ".": {
-      "types": "./dist/types/src/index.d.ts",
-      "import": "./src/index.js"
-    }
-  },
+  "private": true,
   "scripts": {
     "test": "vitest run"
-  },
-  "dependencies": {
-    "@nostr-governance/core": "*"
   }
-}
+}
\ No newline at end of file
diff --git a/packages/testing/src/conformance.js b/packages/testing/src/conformance.js
new file mode 100644
index 0000000..37b8637
--- /dev/null
+++ b/packages/testing/src/conformance.js
@@ -0,0 +1,24 @@
+// Shared test utilities for conformance harness
+export function createFixture(name, state, target, expectation) {
+  return {
+    name,
+    state: {
+      adminState: state.adminState || {},
+      trust: state.trust || {},
+      reports: state.reports || [],
+      trustedMutes: state.trustedMutes || [],
+      overrides: state.overrides || {},
+    },
+    target,
+    expectation,
+  };
+}
+
+export function runConformanceTest(fixture, evaluator) {
+  const decision = evaluator(fixture.state, fixture.target);
+  return {
+    passed: JSON.stringify(decision) === JSON.stringify(fixture.expectation),
+    actual: decision,
+    expected: fixture.expectation,
+  };
+}
\ No newline at end of file
diff --git a/packages/testing/src/index.js b/packages/testing/src/index.js
index ade09ff..8ef9179 100644
--- a/packages/testing/src/index.js
+++ b/packages/testing/src/index.js
@@ -1,2 +1,2 @@
-// Placeholder for testing module exports
+// Testing package exports
 export {};
\ No newline at end of file
diff --git a/packages/testing/test/conformance.test.js b/packages/testing/test/conformance.test.js
new file mode 100644
index 0000000..86924a0
--- /dev/null
+++ b/packages/testing/test/conformance.test.js
@@ -0,0 +1,42 @@
+// Test the conformance utilities
+import { describe, it, expect } from "vitest";
+import { createFixture, runConformanceTest } from "../src/conformance.js";
+
+describe("conformance utilities", () => {
+  it("creates valid fixture objects", () => {
+    const fixture = createFixture(
+      "test-fixture",
+      {
+        adminState: { editors: [] },
+        trust: {},
+        reports: [],
+        trustedMutes: [],
+        overrides: {},
+      },
+      { type: "user", pubkey: "test" },
+      { visibility: "allow" }
+    );
+    
+    expect(fixture.name).toBe("test-fixture");
+    expect(fixture.state.adminState.editors).toEqual([]);
+    expect(fixture.target).toEqual({ type: "user", pubkey: "test" });
+    expect(fixture.expectation).toEqual({ visibility: "allow" });
+  });
+  
+  it("runs conformance tests", () => {
+    const fixture = createFixture(
+      "test-fixture",
+      {},
+      { type: "user", pubkey: "test" },
+      { visibility: "allow" }
+    );
+    
+    // Mock evaluator that always returns the expectation
+    const mockEvaluator = () => ({ visibility: "allow" });
+    
+    const result = runConformanceTest(fixture, mockEvaluator);
+    expect(result.passed).toBe(true);
+    expect(result.actual).toEqual({ visibility: "allow" });
+    expect(result.expected).toEqual({ visibility: "allow" });
+  });
+});
\ No newline at end of file
diff --git a/scripts/import-bitvid-fixtures.mjs b/scripts/import-bitvid-fixtures.mjs
new file mode 100644
index 0000000..599a67e
--- /dev/null
+++ b/scripts/import-bitvid-fixtures.mjs
@@ -0,0 +1,111 @@
+// Import BitVid fixtures into the conformance harness.
+// This is a one-time extractor that reads from reference repos only.
+// No live imports are allowed in package sources.
+import { readFile, writeFile, mkdir } from "node:fs/promises";
+import { join, relative } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __filename = fileURLToPath(import.meta.url);
+const ROOT = join(__filename, "../../..");
+
+// BitVid checkout we're extracting from (read-only)
+const BITVID_ROOT = "/home/user/Documents/GitHub/bitvid";
+
+// Target directories
+const FIXTURES_ROOT = join(ROOT, "fixtures/bitvid");
+const ADMIN_STATE_DIR = join(FIXTURES_ROOT, "admin-state");
+const REPORTS_DIR = join(FIXTURES_ROOT, "reports");
+const TRUSTED_MUTES_DIR = join(FIXTURES_ROOT, "trusted-mutes");
+const OVERRIDES_DIR = join(FIXTURES_ROOT, "overrides");
+const EXPECTATIONS_DIR = join(FIXTURES_ROOT, "expectations");
+
+// Ensure directories exist
+async function setupDirectories() {
+  const dirs = [
+    FIXTURES_ROOT,
+    ADMIN_STATE_DIR,
+    REPORTS_DIR,
+    TRUSTED_MUTES_DIR,
+    OVERRIDES_DIR,
+    EXPECTATIONS_DIR,
+  ];
+  for (const dir of dirs) {
+    await mkdir(dir, { recursive: true });
+  }
+}
+
+// Read a file from BitVid and write it to our fixtures
+async function copyFixture(srcPath, destPath, transform = null) {
+  const content = await readFile(srcPath, "utf8");
+  const finalContent = transform ? transform(content) : content;
+  await writeFile(destPath, finalContent, "utf8");
+  console.log(`Copied ${relative(BITVID_ROOT, srcPath)} → ${relative(ROOT, destPath)}`);
+}
+
+// Example: copy a test file that demonstrates trusted-report behavior
+async function importTrustedReportFixtures() {
+  // This would extract specific test cases from BitVid's test files
+  // For now, we'll create placeholders that describe what we need
+  const placeholder = `// Trusted report threshold fixture
+// Extracted from BitVid js/services/moderationService.js characterization
+export default {
+  description: "Trusted report threshold reached",
+  state: {
+    // Admin list state (curators, editors, super admin)
+    adminState: {
+      editors: [],
+      whitelist: [],
+      blacklist: [],
+      eventBlacklist: []
+    },
+    // Trust graph state (who trusts whom)
+    trust: {
+      // pubkey -> [trustedBy1, trustedBy2, ...]
+    },
+    // Active reports
+    reports: [
+      // { reporter: pubkey, target: pubkey, category: string, timestamp: number }
+    ],
+    // Trusted mutes (aggregated from trust graph)
+    trustedMutes: [
+      // { target: pubkey, count: number, categories: { spam: number, ... } }
+    ],
+    // Overrides (viewer-specific)
+    overrides: {
+      // pubkey -> { visibility: "allow"|"restrict"|"hide", reason: string }
+    }
+  },
+  // Target to evaluate
+  target: {
+    type: "user",
+    pubkey: "example_pubkey_hex"
+  },
+  // Expected outcome
+  expectation: {
+    visibility: "hide",
+    interaction: "deny",
+    reasons: ["trusted-report-threshold"],
+    evidence: [
+      // { reporter: pubkey, category: string, timestamp: number }
+    ]
+  }
+};`;
+  
+  await writeFile(
+    join(FIXTURES_ROOT, "trusted-report-threshold.fixture.js"),
+    placeholder
+  );
+  console.log("Created trusted-report-threshold fixture placeholder");
+}
+
+// Main import process
+async function main() {
+  await setupDirectories();
+  await importTrustedReportFixtures();
+  console.log("Fixture import script ready. Add real extractors as needed.");
+}
+
+main().catch((error) => {
+  console.error("Fixture import failed:", error);
+  process.exit(1);
+});
\ No newline at end of file
diff --git a/tests/conformance/bitvid-fixtures.test.js b/tests/conformance/bitvid-fixtures.test.js
new file mode 100644
index 0000000..411491a
--- /dev/null
+++ b/tests/conformance/bitvid-fixtures.test.js
@@ -0,0 +1,47 @@
+// Test harness for BitVid parity cases
+import { describe, it, expect } from "vitest";
+
+// BitVid parity characterization cases
+const BITVID_CHARACTERIZATION_CASES = [
+  "personal-block-precedence",
+  "user-deny",
+  "event-deny",
+  "address-deny",
+  "allowlist-miss",
+  "protected-target",
+  "trusted-report-threshold-reached",
+  "duplicate-reporter-dedupe",
+  "blocked-reporter-ignored",
+  "trusted-mute-below-threshold",
+  "trusted-mute-at-threshold",
+  "expired-trusted-mute",
+  "viewer-override",
+  "author-override",
+  "cache-fallback-effective",
+  "report-category-thresholds",
+  "mute-aggregation-rules",
+  "hide-vs-restrict-vs-downrank",
+  "moderation-decorator-fields"
+];
+
+describe("BitVid parity characterization", () => {
+  // This suite will grow as we add real fixtures
+  // For now, just ensure the harness loads correctly
+  
+  it("has a list of characterization cases", () => {
+    expect(Array.isArray(BITVID_CHARACTERIZATION_CASES)).toBe(true);
+    expect(BITVID_CHARACTERIZATION_CASES.length).toBe(19);
+  });
+  
+  // Placeholder for when we have real fixtures
+  describe.skip("trusted-report-threshold-reached", () => {
+    it("should hide targets with sufficient trusted reports", async () => {
+      // Load fixture
+      // const fixture = await import("../../fixtures/bitvid/trusted-report-threshold.fixture.js");
+      // Run through evaluator
+      // const decision = evaluate(fixture.state, fixture.target);
+      // Compare to expectation
+      // expect(decision).toEqual(fixture.expectation);
+    });
+  });
+});
\ No newline at end of file