diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/schemas.ts b/x-pack/plugins/siem/common/detection_engine/schemas/common/schemas.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/schemas.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/common/schemas.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/__mocks__/utils.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/__mocks__/utils.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/__mocks__/utils.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/__mocks__/utils.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/error_schema.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/error_schema.test.ts
similarity index 86%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/error_schema.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/error_schema.test.ts
index 9bbde3d5236d..2a4d75522d01 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/error_schema.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/error_schema.test.ts
@@ -9,19 +9,10 @@ import { pipe } from 'fp-ts/lib/pipeable';
 
 import { getErrorPayload } from './__mocks__/utils';
 import { errorSchema, ErrorSchema } from './error_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { exactCheck } from '../../../../../../common/exact_check';
-import { getPaths, foldLeftRight } from '../../../../../../common/test_utils';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('error_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
   test('it should validate an error with a UUID given for id', () => {
     const error = getErrorPayload();
     const decoded = errorSchema.decode(getErrorPayload());
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/error_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/error_schema.ts
similarity index 92%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/error_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/error_schema.ts
index f9c776e3b3cd..986d3ad87ec8 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/error_schema.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/error_schema.ts
@@ -7,7 +7,7 @@
 import * as t from 'io-ts';
 
 /* eslint-disable @typescript-eslint/camelcase */
-import { rule_id, status_code, message } from './schemas';
+import { rule_id, status_code, message } from '../common/schemas';
 /* eslint-enable @typescript-eslint/camelcase */
 
 // We use id: t.string intentionally and _never_ the id from global schemas as
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/find_rules_schema.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/find_rules_schema.test.ts
similarity index 93%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/find_rules_schema.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/find_rules_schema.test.ts
index 1b7d7994462c..51163c3d76ed 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/find_rules_schema.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/find_rules_schema.test.ts
@@ -9,19 +9,10 @@ import { pipe } from 'fp-ts/lib/pipeable';
 import { getFindResponseSingle, getBaseResponsePayload } from './__mocks__/utils';
 import { left } from 'fp-ts/lib/Either';
 import { RulesSchema } from './rules_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { getPaths, foldLeftRight } from '../../../../../../common/test_utils';
-import { exactCheck } from '../../../../../../common/exact_check';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('find_rules_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
   test('it should validate a typical single find rules response', () => {
     const payload = getFindResponseSingle();
     const decoded = findRulesSchema.decode(payload);
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/find_rules_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/find_rules_schema.ts
similarity index 89%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/find_rules_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/find_rules_schema.ts
index d7e8a246cfe0..77077ce2e22a 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/find_rules_schema.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/find_rules_schema.ts
@@ -7,7 +7,7 @@
 import * as t from 'io-ts';
 
 import { rulesSchema } from './rules_schema';
-import { page, perPage, total } from './schemas';
+import { page, perPage, total } from '../common/schemas';
 
 export const findRulesSchema = t.exact(
   t.type({
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/import_rules_schema.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/import_rules_schema.test.ts
similarity index 92%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/import_rules_schema.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/import_rules_schema.test.ts
index 18e17a319883..d7efe4b30af1 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/import_rules_schema.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/import_rules_schema.test.ts
@@ -8,20 +8,11 @@ import { pipe } from 'fp-ts/lib/pipeable';
 import { left, Either } from 'fp-ts/lib/Either';
 import { ImportRulesSchema, importRulesSchema } from './import_rules_schema';
 import { ErrorSchema } from './error_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
 import { Errors } from 'io-ts';
-import { exactCheck } from '../../../../../../common/exact_check';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('import_rules_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
   test('it should validate an empty import response with no errors', () => {
     const payload: ImportRulesSchema = { success: true, success_count: 0, errors: [] };
     const decoded = importRulesSchema.decode(payload);
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/import_rules_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/import_rules_schema.ts
similarity index 91%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/import_rules_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/import_rules_schema.ts
index dec32b18e2b2..adea77e7b933 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/import_rules_schema.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/import_rules_schema.ts
@@ -7,7 +7,7 @@
 import * as t from 'io-ts';
 
 /* eslint-disable @typescript-eslint/camelcase */
-import { success, success_count } from './schemas';
+import { success, success_count } from '../common/schemas';
 import { errorSchema } from './error_schema';
 /* eslint-enable @typescript-eslint/camelcase */
 
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_schema.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_schema.test.ts
similarity index 90%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_schema.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_schema.test.ts
index 2d3fd7591482..fc3f89996daf 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_schema.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_schema.test.ts
@@ -7,19 +7,10 @@
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
 import { PrePackagedRulesSchema, prePackagedRulesSchema } from './prepackaged_rules_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { exactCheck } from '../../../../../../common/exact_check';
-import { getPaths, foldLeftRight } from '../../../../../../common/test_utils';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('prepackaged_rules_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
   test('it should validate an empty prepackaged response with defaults', () => {
     const payload: PrePackagedRulesSchema = { rules_installed: 0, rules_updated: 0 };
     const decoded = prePackagedRulesSchema.decode(payload);
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_schema.ts
similarity index 89%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_schema.ts
index f0eff0ba1975..3b0107c91fee 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_schema.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_schema.ts
@@ -7,7 +7,7 @@
 import * as t from 'io-ts';
 
 /* eslint-disable @typescript-eslint/camelcase */
-import { rules_installed, rules_updated } from './schemas';
+import { rules_installed, rules_updated } from '../common/schemas';
 /* eslint-enable @typescript-eslint/camelcase */
 
 export const prePackagedRulesSchema = t.exact(
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_status_schema.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_status_schema.test.ts
similarity index 92%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_status_schema.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_status_schema.test.ts
index abe601a54611..eeae72209829 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_status_schema.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_status_schema.test.ts
@@ -10,19 +10,10 @@ import {
   PrePackagedRulesStatusSchema,
   prePackagedRulesStatusSchema,
 } from './prepackaged_rules_status_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { exactCheck } from '../../../../../../common/exact_check';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('prepackaged_rules_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
   test('it should validate an empty prepackaged response with defaults', () => {
     const payload: PrePackagedRulesStatusSchema = {
       rules_installed: 0,
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_status_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_status_schema.ts
similarity index 96%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_status_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_status_schema.ts
index 72e5821eb469..ee8e7b48a58b 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/prepackaged_rules_status_schema.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/prepackaged_rules_status_schema.ts
@@ -12,7 +12,7 @@ import {
   rules_custom_installed,
   rules_not_installed,
   rules_not_updated,
-} from './schemas';
+} from '../common/schemas';
 /* eslint-enable @typescript-eslint/camelcase */
 
 export const prePackagedRulesStatusSchema = t.exact(
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_bulk_schema.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/rules_bulk_schema.test.ts
similarity index 93%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_bulk_schema.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/rules_bulk_schema.test.ts
index 98cb2ef05848..04cf012f36db 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_bulk_schema.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/rules_bulk_schema.test.ts
@@ -11,19 +11,10 @@ import { getBaseResponsePayload, getErrorPayload } from './__mocks__/utils';
 import { RulesBulkSchema, rulesBulkSchema } from './rules_bulk_schema';
 import { RulesSchema } from './rules_schema';
 import { ErrorSchema } from './error_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { exactCheck } from '../../../../../../common/exact_check';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('prepackaged_rule_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
   test('it should validate a regular message and and error together with a uuid', () => {
     const payload: RulesBulkSchema = [getBaseResponsePayload(), getErrorPayload()];
     const decoded = rulesBulkSchema.decode(payload);
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_bulk_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/rules_bulk_schema.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_bulk_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/rules_bulk_schema.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/check_type_dependents.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/rules_schema.test.ts
similarity index 70%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/check_type_dependents.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/rules_schema.test.ts
index 0b0d3bf43b1e..8ed9c30507f4 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/check_type_dependents.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/rules_schema.test.ts
@@ -4,32 +4,209 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import { left } from 'fp-ts/lib/Either';
 import { pipe } from 'fp-ts/lib/pipeable';
 import * as t from 'io-ts';
 
 import {
+  rulesSchema,
+  RulesSchema,
   checkTypeDependents,
   getDependents,
   addSavedId,
-  addTimelineTitle,
   addQueryFields,
+  addTimelineTitle,
   addMlFields,
-} from './check_type_dependents';
+} from './rules_schema';
 import { getBaseResponsePayload, getMlRuleResponsePayload } from './__mocks__/utils';
-import { left } from 'fp-ts/lib/Either';
-import { RulesSchema } from './rules_schema';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 import { TypeAndTimelineOnly } from './type_timeline_only_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { exactCheck } from '../../../../../../common/exact_check';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
 
-describe('check_type_dependents', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
+export const ANCHOR_DATE = '2020-02-20T03:57:54.037Z';
+
+describe('rules_schema', () => {
+  test('it should validate a type of "query" without anything extra', () => {
+    const payload = getBaseResponsePayload();
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+    const expected = getBaseResponsePayload();
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual(expected);
   });
 
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
+  test('it should NOT validate a type of "query" when it has extra data', () => {
+    const payload: RulesSchema & { invalid_extra_data?: string } = getBaseResponsePayload();
+    payload.invalid_extra_data = 'invalid_extra_data';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual(['invalid keys "invalid_extra_data"']);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should NOT validate invalid_data for the type', () => {
+    const payload: Omit<RulesSchema, 'type'> & { type: string } = getBaseResponsePayload();
+    payload.type = 'invalid_data';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([
+      'Invalid value "invalid_data" supplied to "type"',
+    ]);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should NOT validate a type of "query" with a saved_id together', () => {
+    const payload = getBaseResponsePayload();
+    payload.type = 'query';
+    payload.saved_id = 'save id 123';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual(['invalid keys "saved_id"']);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should validate a type of "saved_query" with a "saved_id" dependent', () => {
+    const payload = getBaseResponsePayload();
+    payload.type = 'saved_query';
+    payload.saved_id = 'save id 123';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+    const expected = getBaseResponsePayload();
+
+    expected.type = 'saved_query';
+    expected.saved_id = 'save id 123';
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual(expected);
+  });
+
+  test('it should NOT validate a type of "saved_query" without a "saved_id" dependent', () => {
+    const payload = getBaseResponsePayload();
+    payload.type = 'saved_query';
+    delete payload.saved_id;
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([
+      'Invalid value "undefined" supplied to "saved_id"',
+    ]);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should NOT validate a type of "saved_query" when it has extra data', () => {
+    const payload: RulesSchema & { invalid_extra_data?: string } = getBaseResponsePayload();
+    payload.type = 'saved_query';
+    payload.saved_id = 'save id 123';
+    payload.invalid_extra_data = 'invalid_extra_data';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual(['invalid keys "invalid_extra_data"']);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should validate a type of "timeline_id" if there is a "timeline_title" dependent', () => {
+    const payload = getBaseResponsePayload();
+    payload.timeline_id = 'some timeline id';
+    payload.timeline_title = 'some timeline title';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+    const expected = getBaseResponsePayload();
+    expected.timeline_id = 'some timeline id';
+    expected.timeline_title = 'some timeline title';
+
+    expect(getPaths(left(message.errors))).toEqual([]);
+    expect(message.schema).toEqual(expected);
+  });
+
+  test('it should NOT validate a type of "timeline_id" if there is "timeline_title" dependent when it has extra invalid data', () => {
+    const payload: RulesSchema & { invalid_extra_data?: string } = getBaseResponsePayload();
+    payload.timeline_id = 'some timeline id';
+    payload.timeline_title = 'some timeline title';
+    payload.invalid_extra_data = 'invalid_extra_data';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual(['invalid keys "invalid_extra_data"']);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should NOT validate a type of "timeline_id" if there is NOT a "timeline_title" dependent', () => {
+    const payload = getBaseResponsePayload();
+    payload.timeline_id = 'some timeline id';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([
+      'Invalid value "undefined" supplied to "timeline_title"',
+    ]);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should NOT validate a type of "timeline_title" if there is NOT a "timeline_id" dependent', () => {
+    const payload = getBaseResponsePayload();
+    payload.timeline_title = 'some timeline title';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual(['invalid keys "timeline_title"']);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should NOT validate a type of "saved_query" with a "saved_id" dependent and a "timeline_title" but there is NOT a "timeline_id"', () => {
+    const payload = getBaseResponsePayload();
+    payload.saved_id = 'some saved id';
+    payload.type = 'saved_query';
+    payload.timeline_title = 'some timeline title';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual(['invalid keys "timeline_title"']);
+    expect(message.schema).toEqual({});
+  });
+
+  test('it should NOT validate a type of "saved_query" with a "saved_id" dependent and a "timeline_id" but there is NOT a "timeline_title"', () => {
+    const payload = getBaseResponsePayload();
+    payload.saved_id = 'some saved id';
+    payload.type = 'saved_query';
+    payload.timeline_id = 'some timeline id';
+
+    const decoded = rulesSchema.decode(payload);
+    const checked = exactCheck(payload, decoded);
+    const message = pipe(checked, foldLeftRight);
+
+    expect(getPaths(left(message.errors))).toEqual([
+      'Invalid value "undefined" supplied to "timeline_title"',
+    ]);
+    expect(message.schema).toEqual({});
   });
 
   describe('checkTypeDependents', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/rules_schema.ts
similarity index 54%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/rules_schema.ts
index fb1ee8e670e3..a7a31ec9e1b5 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_schema.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/rules_schema.ts
@@ -7,10 +7,11 @@
 /* eslint-disable @typescript-eslint/camelcase */
 import * as t from 'io-ts';
 import { isObject } from 'lodash/fp';
-import { Either, fold, right, left } from 'fp-ts/lib/Either';
-
+import { Either, left, fold } from 'fp-ts/lib/Either';
 import { pipe } from 'fp-ts/lib/pipeable';
-import { checkTypeDependents } from './check_type_dependents';
+import { typeAndTimelineOnlySchema, TypeAndTimelineOnly } from './type_timeline_only_schema';
+import { isMlRule } from '../../../machine_learning/helpers';
+
 import {
   actions,
   anomaly_threshold,
@@ -54,9 +55,8 @@ import {
   filters,
   meta,
   note,
-} from './schemas';
+} from '../common/schemas';
 import { ListsDefaultArray } from '../types/lists_default_array';
-import { hasListsFeature } from '../../../feature_flags';
 
 /**
  * This is the required fields for the rules schema response. Put all required properties on
@@ -155,32 +155,92 @@ export const rulesSchema = new t.Type<
   'RulesSchema',
   (input: unknown): input is RulesWithoutTypeDependentsSchema => isObject(input),
   (input): Either<t.Errors, RulesWithoutTypeDependentsSchema> => {
-    const output = checkTypeDependents(input);
-    if (!hasListsFeature()) {
-      // TODO: (LIST-FEATURE) Remove this after the lists feature is an accepted feature for a particular release
-      return removeList(output);
-    } else {
-      return output;
-    }
+    return checkTypeDependents(input);
   },
   t.identity
 );
 
-// TODO: (LIST-FEATURE) Remove this after the lists feature is an accepted feature for a particular release
-export const removeList = (
-  decoded: Either<t.Errors, RequiredRulesSchema>
-): Either<t.Errors, RequiredRulesSchema> => {
-  const onLeft = (errors: t.Errors): Either<t.Errors, RequiredRulesSchema> => left(errors);
-  const onRight = (decodedValue: RequiredRulesSchema): Either<t.Errors, RequiredRulesSchema> => {
-    delete decodedValue.exceptions_list;
-    return right(decodedValue);
-  };
-  const folded = fold(onLeft, onRight);
-  return pipe(decoded, folded);
-};
-
 /**
  * This is the correct type you want to use for Rules that are outputted from the
  * REST interface. This has all base and all optional properties merged together.
  */
 export type RulesSchema = t.TypeOf<typeof rulesSchema>;
+
+export const addSavedId = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
+  if (typeAndTimelineOnly.type === 'saved_query') {
+    return [t.exact(t.type({ saved_id: dependentRulesSchema.props.saved_id }))];
+  } else {
+    return [];
+  }
+};
+
+export const addTimelineTitle = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
+  if (typeAndTimelineOnly.timeline_id != null) {
+    return [
+      t.exact(t.type({ timeline_title: dependentRulesSchema.props.timeline_title })),
+      t.exact(t.type({ timeline_id: dependentRulesSchema.props.timeline_id })),
+    ];
+  } else {
+    return [];
+  }
+};
+
+export const addQueryFields = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
+  if (typeAndTimelineOnly.type === 'query' || typeAndTimelineOnly.type === 'saved_query') {
+    return [
+      t.exact(t.type({ query: dependentRulesSchema.props.query })),
+      t.exact(t.type({ language: dependentRulesSchema.props.language })),
+    ];
+  } else {
+    return [];
+  }
+};
+
+export const addMlFields = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
+  if (isMlRule(typeAndTimelineOnly.type)) {
+    return [
+      t.exact(t.type({ anomaly_threshold: dependentRulesSchema.props.anomaly_threshold })),
+      t.exact(
+        t.type({ machine_learning_job_id: dependentRulesSchema.props.machine_learning_job_id })
+      ),
+    ];
+  } else {
+    return [];
+  }
+};
+
+export const getDependents = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed => {
+  const dependents: t.Mixed[] = [
+    t.exact(requiredRulesSchema),
+    t.exact(partialRulesSchema),
+    ...addSavedId(typeAndTimelineOnly),
+    ...addTimelineTitle(typeAndTimelineOnly),
+    ...addQueryFields(typeAndTimelineOnly),
+    ...addMlFields(typeAndTimelineOnly),
+  ];
+
+  if (dependents.length > 1) {
+    // This unsafe cast is because t.intersection does not use an array but rather a set of
+    // tuples and really does not look like they expected us to ever dynamically build up
+    // intersections, but here we are doing that. Looking at their code, although they limit
+    // the array elements to 5, it looks like you have N number of intersections
+    const unsafeCast: [t.Mixed, t.Mixed] = dependents as [t.Mixed, t.Mixed];
+    return t.intersection(unsafeCast);
+  } else {
+    // We are not allowed to call t.intersection with a single value so we return without
+    // it here normally.
+    return dependents[0];
+  }
+};
+
+export const checkTypeDependents = (input: unknown): Either<t.Errors, RequiredRulesSchema> => {
+  const typeOnlyDecoded = typeAndTimelineOnlySchema.decode(input);
+  const onLeft = (errors: t.Errors): Either<t.Errors, RequiredRulesSchema> => left(errors);
+  const onRight = (
+    typeAndTimelineOnly: TypeAndTimelineOnly
+  ): Either<t.Errors, RequiredRulesSchema> => {
+    const intersections = getDependents(typeAndTimelineOnly);
+    return intersections.decode(input);
+  };
+  return pipe(typeOnlyDecoded, fold(onLeft, onRight));
+};
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/type_timeline_only_schema.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/type_timeline_only_schema.test.ts
similarity index 85%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/type_timeline_only_schema.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/type_timeline_only_schema.test.ts
index 8f06e2c6e49b..c7335ffd62f0 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/type_timeline_only_schema.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/type_timeline_only_schema.test.ts
@@ -8,19 +8,10 @@ import { left } from 'fp-ts/lib/Either';
 import { pipe } from 'fp-ts/lib/pipeable';
 
 import { TypeAndTimelineOnly, typeAndTimelineOnlySchema } from './type_timeline_only_schema';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { exactCheck } from '../../../../../../common/exact_check';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
+import { exactCheck } from '../../../exact_check';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('prepackaged_rule_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
   test('it should validate a a type and timeline_id together', () => {
     const payload: TypeAndTimelineOnly = {
       type: 'query',
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/type_timeline_only_schema.ts b/x-pack/plugins/siem/common/detection_engine/schemas/response/type_timeline_only_schema.ts
similarity index 92%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/type_timeline_only_schema.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/response/type_timeline_only_schema.ts
index 6d11ff03563d..d23d4ad2e83d 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/type_timeline_only_schema.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/response/type_timeline_only_schema.ts
@@ -7,7 +7,7 @@
 import * as t from 'io-ts';
 
 /* eslint-disable @typescript-eslint/camelcase */
-import { timeline_id, type } from './schemas';
+import { timeline_id, type } from '../common/schemas';
 /* eslint-enable @typescript-eslint/camelcase */
 
 /**
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/iso_date_string.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/iso_date_string.test.ts
similarity index 95%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/iso_date_string.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/iso_date_string.test.ts
index 9f9181359d44..e8bce3f38f4b 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/iso_date_string.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/iso_date_string.test.ts
@@ -7,7 +7,7 @@
 import { IsoDateString } from './iso_date_string';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
-import { getPaths, foldLeftRight } from '../../../../../../common/test_utils';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('ios_date_string', () => {
   test('it should validate a iso string', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/iso_date_string.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/iso_date_string.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/iso_date_string.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/iso_date_string.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/lists_default_array.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/lists_default_array.test.ts
similarity index 98%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/lists_default_array.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/lists_default_array.test.ts
index dc0bd6cacf0d..31e0a8e5c2c7 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/lists_default_array.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/lists_default_array.test.ts
@@ -7,7 +7,7 @@
 import { ListsDefaultArray } from './lists_default_array';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
-import { getPaths, foldLeftRight } from '../../../../../../common/test_utils';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('lists_default_array', () => {
   test('it should validate an empty array', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/lists_default_array.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/lists_default_array.ts
similarity index 97%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/lists_default_array.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/lists_default_array.ts
index 743914ad070a..8244f4a29e19 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/lists_default_array.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/lists_default_array.ts
@@ -11,7 +11,7 @@ import {
   list_and as listAnd,
   list_values as listValues,
   list_values_operator as listOperator,
-} from '../response/schemas';
+} from '../common/schemas';
 
 export type ListsDefaultArrayC = t.Type<List[], List[], unknown>;
 export type List = t.TypeOf<typeof listAnd>;
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/positive_integer.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/positive_integer.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/positive_integer.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/positive_integer.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/positive_integer_greater_than_zero.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/positive_integer_greater_than_zero.test.ts
similarity index 95%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/positive_integer_greater_than_zero.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/positive_integer_greater_than_zero.test.ts
index a3338c878bd7..821eb066a653 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/positive_integer_greater_than_zero.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/positive_integer_greater_than_zero.test.ts
@@ -7,7 +7,7 @@
 import { PositiveIntegerGreaterThanZero } from './positive_integer_greater_than_zero';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
-import { getPaths, foldLeftRight } from '../../../../../../common/test_utils';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('positive_integer_greater_than_zero', () => {
   test('it should validate a positive number', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/positive_integer_greater_than_zero.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/positive_integer_greater_than_zero.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/positive_integer_greater_than_zero.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/positive_integer_greater_than_zero.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/postive_integer.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/postive_integer.test.ts
similarity index 95%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/postive_integer.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/postive_integer.test.ts
index 48ea2025b9b1..ea00ecf5efe0 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/postive_integer.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/postive_integer.test.ts
@@ -7,7 +7,7 @@
 import { PositiveInteger } from './positive_integer';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('positive_integer_greater_than_zero', () => {
   test('it should validate a positive number', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/references_default_array.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/references_default_array.test.ts
similarity index 95%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/references_default_array.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/references_default_array.test.ts
index 3aaff7e00ad5..43e2dbdac1fe 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/references_default_array.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/references_default_array.test.ts
@@ -7,7 +7,7 @@
 import { ReferencesDefaultArray } from './references_default_array';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
-import { getPaths, foldLeftRight } from '../../../../../../common/test_utils';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('references_default_array', () => {
   test('it should validate an empty array', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/references_default_array.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/references_default_array.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/references_default_array.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/references_default_array.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/risk_score.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/risk_score.test.ts
similarity index 96%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/risk_score.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/risk_score.test.ts
index 41c0faf4d608..cf849f28a096 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/risk_score.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/risk_score.test.ts
@@ -7,7 +7,7 @@
 import { RiskScore } from './risk_score';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('risk_score', () => {
   test('it should validate a positive number', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/risk_score.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/risk_score.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/risk_score.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/risk_score.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/uuid.test.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/uuid.test.ts
similarity index 94%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/uuid.test.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/uuid.test.ts
index b640b449e6b8..d3a68a757548 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/uuid.test.ts
+++ b/x-pack/plugins/siem/common/detection_engine/schemas/types/uuid.test.ts
@@ -7,7 +7,7 @@
 import { UUID } from './uuid';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { left } from 'fp-ts/lib/Either';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
+import { foldLeftRight, getPaths } from '../../../test_utils';
 
 describe('uuid', () => {
   test('it should validate a uuid', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/uuid.ts b/x-pack/plugins/siem/common/detection_engine/schemas/types/uuid.ts
similarity index 100%
rename from x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/types/uuid.ts
rename to x-pack/plugins/siem/common/detection_engine/schemas/types/uuid.ts
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/add_prepackaged_rules_route.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/add_prepackaged_rules_route.ts
index 83dd87002e8f..6268451042da 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/add_prepackaged_rules_route.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/add_prepackaged_rules_route.ts
@@ -4,6 +4,10 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import {
+  PrePackagedRulesSchema,
+  prePackagedRulesSchema,
+} from '../../../../../common/detection_engine/schemas/response/prepackaged_rules_schema';
 import { IRouter } from '../../../../../../../../src/core/server';
 import { DETECTION_ENGINE_PREPACKAGED_URL } from '../../../../../common/constants';
 import { getIndexExists } from '../../index/get_index_exists';
@@ -14,10 +18,6 @@ import { updatePrepackagedRules } from '../../rules/update_prepacked_rules';
 import { getRulesToInstall } from '../../rules/get_rules_to_install';
 import { getRulesToUpdate } from '../../rules/get_rules_to_update';
 import { getExistingPrepackagedRules } from '../../rules/get_existing_prepackaged_rules';
-import {
-  PrePackagedRulesSchema,
-  prePackagedRulesSchema,
-} from '../schemas/response/prepackaged_rules_schema';
 import { validate } from './validate';
 
 export const addPrepackedRulesRoute = (router: IRouter) => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts
index ff6d212deb58..d88cc7fcde50 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/create_rules_bulk_route.ts
@@ -6,6 +6,7 @@
 
 import uuid from 'uuid';
 
+import { rulesBulkSchema } from '../../../../../common/detection_engine/schemas/response/rules_bulk_schema';
 import { IRouter } from '../../../../../../../../src/core/server';
 import { DETECTION_ENGINE_RULES_URL } from '../../../../../common/constants';
 import { SetupPlugins } from '../../../../plugin';
@@ -24,7 +25,6 @@ import {
   buildSiemResponse,
 } from '../utils';
 import { createRulesBulkSchema } from '../schemas/create_rules_bulk_schema';
-import { rulesBulkSchema } from '../schemas/response/rules_bulk_schema';
 import { updateRulesNotifications } from '../../rules/update_rules_notifications';
 
 export const createRulesBulkRoute = (router: IRouter, ml: SetupPlugins['ml']) => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/delete_rules_bulk_route.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/delete_rules_bulk_route.ts
index 036e29aa0ebe..01ad3c7d4e72 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/delete_rules_bulk_route.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/delete_rules_bulk_route.ts
@@ -4,10 +4,10 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import { rulesBulkSchema } from '../../../../../common/detection_engine/schemas/response/rules_bulk_schema';
 import { IRouter, RouteConfig, RequestHandler } from '../../../../../../../../src/core/server';
 import { DETECTION_ENGINE_RULES_URL } from '../../../../../common/constants';
 import { queryRulesBulkSchema } from '../schemas/query_rules_bulk_schema';
-import { rulesBulkSchema } from '../schemas/response/rules_bulk_schema';
 import { getIdBulkError } from './utils';
 import { transformValidateBulkError, validate } from './validate';
 import { transformBulkError, buildRouteValidation, buildSiemResponse } from '../utils';
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/get_prepackaged_rules_status_route.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/get_prepackaged_rules_status_route.ts
index 67a54f3ba492..90380b0483c8 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/get_prepackaged_rules_status_route.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/get_prepackaged_rules_status_route.ts
@@ -4,6 +4,10 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import {
+  PrePackagedRulesStatusSchema,
+  prePackagedRulesStatusSchema,
+} from '../../../../../common/detection_engine/schemas/response/prepackaged_rules_status_schema';
 import { IRouter } from '../../../../../../../../src/core/server';
 import { DETECTION_ENGINE_PREPACKAGED_URL } from '../../../../../common/constants';
 import { transformError, buildSiemResponse } from '../utils';
@@ -12,10 +16,6 @@ import { getRulesToInstall } from '../../rules/get_rules_to_install';
 import { getRulesToUpdate } from '../../rules/get_rules_to_update';
 import { findRules } from '../../rules/find_rules';
 import { getExistingPrepackagedRules } from '../../rules/get_existing_prepackaged_rules';
-import {
-  PrePackagedRulesStatusSchema,
-  prePackagedRulesStatusSchema,
-} from '../schemas/response/prepackaged_rules_status_schema';
 import { validate } from './validate';
 
 export const getPrepackagedRulesStatusRoute = (router: IRouter) => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/import_rules_route.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/import_rules_route.ts
index 901e7403bb95..311149087cc4 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/import_rules_route.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/import_rules_route.ts
@@ -7,6 +7,10 @@
 import { chunk } from 'lodash/fp';
 import { extname } from 'path';
 
+import {
+  ImportRulesSchema,
+  importRulesSchema,
+} from '../../../../../common/detection_engine/schemas/response/import_rules_schema';
 import { IRouter } from '../../../../../../../../src/core/server';
 import { createPromiseFromStreams } from '../../../../../../../../src/legacy/utils/streams';
 import { DETECTION_ENGINE_RULES_URL } from '../../../../../common/constants';
@@ -31,7 +35,6 @@ import {
 import { ImportRuleAlertRest } from '../../types';
 import { patchRules } from '../../rules/patch_rules';
 import { importRulesQuerySchema, importRulesPayloadSchema } from '../schemas/import_rules_schema';
-import { ImportRulesSchema, importRulesSchema } from '../schemas/response/import_rules_schema';
 import { getTupleDuplicateErrorsAndUniqueRules } from './utils';
 import { validate } from './validate';
 import { createRulesStreamFromNdJson } from '../../rules/create_rules_stream_from_ndjson';
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts
index cc4d5e03500a..0d0cd28738c9 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/patch_rules_bulk_route.ts
@@ -4,6 +4,7 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import { rulesBulkSchema } from '../../../../../common/detection_engine/schemas/response/rules_bulk_schema';
 import { IRouter } from '../../../../../../../../src/core/server';
 import { DETECTION_ENGINE_RULES_URL } from '../../../../../common/constants';
 import { SetupPlugins } from '../../../../plugin';
@@ -14,7 +15,6 @@ import { transformBulkError, buildRouteValidation, buildSiemResponse } from '../
 import { getIdBulkError } from './utils';
 import { transformValidateBulkError, validate } from './validate';
 import { patchRulesBulkSchema } from '../schemas/patch_rules_bulk_schema';
-import { rulesBulkSchema } from '../schemas/response/rules_bulk_schema';
 import { patchRules } from '../../rules/patch_rules';
 import { updateRulesNotifications } from '../../rules/update_rules_notifications';
 import { ruleStatusSavedObjectsClientFactory } from '../../signals/rule_status_saved_objects_client';
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/update_rules_bulk_route.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/update_rules_bulk_route.ts
index c0dfecc71ce0..335684dc38b3 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/update_rules_bulk_route.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/update_rules_bulk_route.ts
@@ -4,6 +4,7 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import { rulesBulkSchema } from '../../../../../common/detection_engine/schemas/response/rules_bulk_schema';
 import { IRouter } from '../../../../../../../../src/core/server';
 import { DETECTION_ENGINE_RULES_URL } from '../../../../../common/constants';
 import { SetupPlugins } from '../../../../plugin';
@@ -15,7 +16,6 @@ import { transformValidateBulkError, validate } from './validate';
 import { buildRouteValidation, transformBulkError, buildSiemResponse } from '../utils';
 import { updateRulesBulkSchema } from '../schemas/update_rules_bulk_schema';
 import { updateRules } from '../../rules/update_rules';
-import { rulesBulkSchema } from '../schemas/response/rules_bulk_schema';
 import { updateRulesNotifications } from '../../rules/update_rules_notifications';
 import { ruleStatusSavedObjectsClientFactory } from '../../signals/rule_status_saved_objects_client';
 
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.test.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.test.ts
index 9069202d4d3a..13a5bbd2afc0 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.test.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.test.ts
@@ -14,9 +14,9 @@ import {
 } from './validate';
 import { getResult } from '../__mocks__/request_responses';
 import { FindResult } from '../../../../../../alerting/server';
-import { RulesSchema } from '../schemas/response/rules_schema';
 import { BulkError } from '../utils';
 import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../feature_flags';
+import { RulesSchema } from '../../../../../common/detection_engine/schemas/response/rules_schema';
 
 export const ruleOutput: RulesSchema = {
   actions: [],
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.ts
index cda3a4b81ed9..1220b12d1d1b 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/routes/rules/validate.ts
@@ -9,6 +9,11 @@ import { fold } from 'fp-ts/lib/Either';
 import { pipe } from 'fp-ts/lib/pipeable';
 import * as t from 'io-ts';
 
+import { findRulesSchema } from '../../../../../common/detection_engine/schemas/response/find_rules_schema';
+import {
+  RulesSchema,
+  rulesSchema,
+} from '../../../../../common/detection_engine/schemas/response/rules_schema';
 import { formatErrors } from '../../../../../common/format_errors';
 import { exactCheck } from '../../../../../common/exact_check';
 import { PartialAlert, FindResult } from '../../../../../../alerting/server';
@@ -19,9 +24,7 @@ import {
 } from '../../rules/types';
 import { OutputRuleAlertRest } from '../../types';
 import { createBulkErrorObject, BulkError } from '../utils';
-import { rulesSchema, RulesSchema } from '../schemas/response/rules_schema';
 import { transformFindAlerts, transform, transformAlertToRule } from './utils';
-import { findRulesSchema } from '../schemas/response/find_rules_schema';
 import { RuleActions } from '../../rule_actions/types';
 
 export const transformValidateFindAlerts = (
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/check_type_dependents.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/check_type_dependents.ts
deleted file mode 100644
index 1c1bee58f0c9..000000000000
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/check_type_dependents.ts
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
- */
-
-import * as t from 'io-ts';
-import { Either, left, fold } from 'fp-ts/lib/Either';
-import { pipe } from 'fp-ts/lib/pipeable';
-
-import { isMlRule } from '../../../../../../common/machine_learning/helpers';
-import {
-  dependentRulesSchema,
-  RequiredRulesSchema,
-  partialRulesSchema,
-  requiredRulesSchema,
-} from './rules_schema';
-import { typeAndTimelineOnlySchema, TypeAndTimelineOnly } from './type_timeline_only_schema';
-
-export const addSavedId = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
-  if (typeAndTimelineOnly.type === 'saved_query') {
-    return [t.exact(t.type({ saved_id: dependentRulesSchema.props.saved_id }))];
-  } else {
-    return [];
-  }
-};
-
-export const addTimelineTitle = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
-  if (typeAndTimelineOnly.timeline_id != null) {
-    return [
-      t.exact(t.type({ timeline_title: dependentRulesSchema.props.timeline_title })),
-      t.exact(t.type({ timeline_id: dependentRulesSchema.props.timeline_id })),
-    ];
-  } else {
-    return [];
-  }
-};
-
-export const addQueryFields = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
-  if (typeAndTimelineOnly.type === 'query' || typeAndTimelineOnly.type === 'saved_query') {
-    return [
-      t.exact(t.type({ query: dependentRulesSchema.props.query })),
-      t.exact(t.type({ language: dependentRulesSchema.props.language })),
-    ];
-  } else {
-    return [];
-  }
-};
-
-export const addMlFields = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed[] => {
-  if (isMlRule(typeAndTimelineOnly.type)) {
-    return [
-      t.exact(t.type({ anomaly_threshold: dependentRulesSchema.props.anomaly_threshold })),
-      t.exact(
-        t.type({ machine_learning_job_id: dependentRulesSchema.props.machine_learning_job_id })
-      ),
-    ];
-  } else {
-    return [];
-  }
-};
-
-export const getDependents = (typeAndTimelineOnly: TypeAndTimelineOnly): t.Mixed => {
-  const dependents: t.Mixed[] = [
-    t.exact(requiredRulesSchema),
-    t.exact(partialRulesSchema),
-    ...addSavedId(typeAndTimelineOnly),
-    ...addTimelineTitle(typeAndTimelineOnly),
-    ...addQueryFields(typeAndTimelineOnly),
-    ...addMlFields(typeAndTimelineOnly),
-  ];
-
-  if (dependents.length > 1) {
-    // This unsafe cast is because t.intersection does not use an array but rather a set of
-    // tuples and really does not look like they expected us to ever dynamically build up
-    // intersections, but here we are doing that. Looking at their code, although they limit
-    // the array elements to 5, it looks like you have N number of intersections
-    const unsafeCast: [t.Mixed, t.Mixed] = dependents as [t.Mixed, t.Mixed];
-    return t.intersection(unsafeCast);
-  } else {
-    // We are not allowed to call t.intersection with a single value so we return without
-    // it here normally.
-    return dependents[0];
-  }
-};
-
-export const checkTypeDependents = (input: unknown): Either<t.Errors, RequiredRulesSchema> => {
-  const typeOnlyDecoded = typeAndTimelineOnlySchema.decode(input);
-  const onLeft = (errors: t.Errors): Either<t.Errors, RequiredRulesSchema> => left(errors);
-  const onRight = (
-    typeAndTimelineOnly: TypeAndTimelineOnly
-  ): Either<t.Errors, RequiredRulesSchema> => {
-    const intersections = getDependents(typeAndTimelineOnly);
-    return intersections.decode(input);
-  };
-  return pipe(typeOnlyDecoded, fold(onLeft, onRight));
-};
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_schema.test.ts b/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_schema.test.ts
deleted file mode 100644
index ade4d12517ac..000000000000
--- a/x-pack/plugins/siem/server/lib/detection_engine/routes/schemas/response/rules_schema.test.ts
+++ /dev/null
@@ -1,289 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License;
- * you may not use this file except in compliance with the Elastic License.
- */
-
-import { left } from 'fp-ts/lib/Either';
-import { pipe } from 'fp-ts/lib/pipeable';
-
-import { rulesSchema, RulesSchema, removeList } from './rules_schema';
-import { getBaseResponsePayload } from './__mocks__/utils';
-import { setFeatureFlagsForTestsOnly, unSetFeatureFlagsForTestsOnly } from '../../../feature_flags';
-import { foldLeftRight, getPaths } from '../../../../../../common/test_utils';
-import { exactCheck } from '../../../../../../common/exact_check';
-
-export const ANCHOR_DATE = '2020-02-20T03:57:54.037Z';
-
-describe('rules_schema', () => {
-  beforeAll(() => {
-    setFeatureFlagsForTestsOnly();
-  });
-
-  afterAll(() => {
-    unSetFeatureFlagsForTestsOnly();
-  });
-
-  test('it should validate a type of "query" without anything extra', () => {
-    const payload = getBaseResponsePayload();
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-    const expected = getBaseResponsePayload();
-
-    expect(getPaths(left(message.errors))).toEqual([]);
-    expect(message.schema).toEqual(expected);
-  });
-
-  test('it should NOT validate a type of "query" when it has extra data', () => {
-    const payload: RulesSchema & { invalid_extra_data?: string } = getBaseResponsePayload();
-    payload.invalid_extra_data = 'invalid_extra_data';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual(['invalid keys "invalid_extra_data"']);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should NOT validate invalid_data for the type', () => {
-    const payload: Omit<RulesSchema, 'type'> & { type: string } = getBaseResponsePayload();
-    payload.type = 'invalid_data';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual([
-      'Invalid value "invalid_data" supplied to "type"',
-    ]);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should NOT validate a type of "query" with a saved_id together', () => {
-    const payload = getBaseResponsePayload();
-    payload.type = 'query';
-    payload.saved_id = 'save id 123';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual(['invalid keys "saved_id"']);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should validate a type of "saved_query" with a "saved_id" dependent', () => {
-    const payload = getBaseResponsePayload();
-    payload.type = 'saved_query';
-    payload.saved_id = 'save id 123';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-    const expected = getBaseResponsePayload();
-
-    expected.type = 'saved_query';
-    expected.saved_id = 'save id 123';
-
-    expect(getPaths(left(message.errors))).toEqual([]);
-    expect(message.schema).toEqual(expected);
-  });
-
-  test('it should NOT validate a type of "saved_query" without a "saved_id" dependent', () => {
-    const payload = getBaseResponsePayload();
-    payload.type = 'saved_query';
-    delete payload.saved_id;
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual([
-      'Invalid value "undefined" supplied to "saved_id"',
-    ]);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should NOT validate a type of "saved_query" when it has extra data', () => {
-    const payload: RulesSchema & { invalid_extra_data?: string } = getBaseResponsePayload();
-    payload.type = 'saved_query';
-    payload.saved_id = 'save id 123';
-    payload.invalid_extra_data = 'invalid_extra_data';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual(['invalid keys "invalid_extra_data"']);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should validate a type of "timeline_id" if there is a "timeline_title" dependent', () => {
-    const payload = getBaseResponsePayload();
-    payload.timeline_id = 'some timeline id';
-    payload.timeline_title = 'some timeline title';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-    const expected = getBaseResponsePayload();
-    expected.timeline_id = 'some timeline id';
-    expected.timeline_title = 'some timeline title';
-
-    expect(getPaths(left(message.errors))).toEqual([]);
-    expect(message.schema).toEqual(expected);
-  });
-
-  test('it should NOT validate a type of "timeline_id" if there is "timeline_title" dependent when it has extra invalid data', () => {
-    const payload: RulesSchema & { invalid_extra_data?: string } = getBaseResponsePayload();
-    payload.timeline_id = 'some timeline id';
-    payload.timeline_title = 'some timeline title';
-    payload.invalid_extra_data = 'invalid_extra_data';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual(['invalid keys "invalid_extra_data"']);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should NOT validate a type of "timeline_id" if there is NOT a "timeline_title" dependent', () => {
-    const payload = getBaseResponsePayload();
-    payload.timeline_id = 'some timeline id';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual([
-      'Invalid value "undefined" supplied to "timeline_title"',
-    ]);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should NOT validate a type of "timeline_title" if there is NOT a "timeline_id" dependent', () => {
-    const payload = getBaseResponsePayload();
-    payload.timeline_title = 'some timeline title';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual(['invalid keys "timeline_title"']);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should NOT validate a type of "saved_query" with a "saved_id" dependent and a "timeline_title" but there is NOT a "timeline_id"', () => {
-    const payload = getBaseResponsePayload();
-    payload.saved_id = 'some saved id';
-    payload.type = 'saved_query';
-    payload.timeline_title = 'some timeline title';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual(['invalid keys "timeline_title"']);
-    expect(message.schema).toEqual({});
-  });
-
-  test('it should NOT validate a type of "saved_query" with a "saved_id" dependent and a "timeline_id" but there is NOT a "timeline_title"', () => {
-    const payload = getBaseResponsePayload();
-    payload.saved_id = 'some saved id';
-    payload.type = 'saved_query';
-    payload.timeline_id = 'some timeline id';
-
-    const decoded = rulesSchema.decode(payload);
-    const checked = exactCheck(payload, decoded);
-    const message = pipe(checked, foldLeftRight);
-
-    expect(getPaths(left(message.errors))).toEqual([
-      'Invalid value "undefined" supplied to "timeline_title"',
-    ]);
-    expect(message.schema).toEqual({});
-  });
-
-  // TODO: (LIST-FEATURE) Remove this test once the feature flag is deployed
-  test('it should remove exceptions_list when we need it to be removed because the feature is off but there exists a list in the data', () => {
-    const payload = getBaseResponsePayload();
-    const decoded = rulesSchema.decode(payload);
-    const listRemoved = removeList(decoded);
-    const message = pipe(listRemoved, foldLeftRight);
-    expect(getPaths(left(message.errors))).toEqual([]);
-    expect(message.schema).toEqual({
-      id: '7a7065d7-6e8b-4aae-8d20-c93613dec9f9',
-      created_at: '2020-02-20T03:57:54.037Z',
-      updated_at: '2020-02-20T03:57:54.037Z',
-      created_by: 'elastic',
-      description: 'some description',
-      enabled: true,
-      false_positives: ['false positive 1', 'false positive 2'],
-      from: 'now-6m',
-      immutable: false,
-      name: 'Query with a rule id',
-      query: 'user.name: root or user.name: admin',
-      references: ['test 1', 'test 2'],
-      severity: 'high',
-      updated_by: 'elastic_kibana',
-      tags: [],
-      to: 'now',
-      type: 'query',
-      threat: [],
-      version: 1,
-      output_index: '.siem-signals-hassanabad-frank-default',
-      max_signals: 100,
-      risk_score: 55,
-      language: 'kuery',
-      rule_id: 'query-rule-id',
-      interval: '5m',
-      status: 'succeeded',
-      status_date: '2020-02-22T16:47:50.047Z',
-      last_success_at: '2020-02-22T16:47:50.047Z',
-      last_success_message: 'succeeded',
-    });
-  });
-
-  test('it should work with exceptions_list that are not there and not cause invalidation or errors', () => {
-    const payload = getBaseResponsePayload();
-    const { exceptions_list, ...payloadWithoutLists } = payload;
-    const decoded = rulesSchema.decode(payloadWithoutLists);
-    const listRemoved = removeList(decoded);
-    const message = pipe(listRemoved, foldLeftRight);
-    expect(getPaths(left(message.errors))).toEqual([]);
-    expect(message.schema).toEqual({
-      id: '7a7065d7-6e8b-4aae-8d20-c93613dec9f9',
-      created_at: '2020-02-20T03:57:54.037Z',
-      updated_at: '2020-02-20T03:57:54.037Z',
-      created_by: 'elastic',
-      description: 'some description',
-      enabled: true,
-      false_positives: ['false positive 1', 'false positive 2'],
-      from: 'now-6m',
-      immutable: false,
-      name: 'Query with a rule id',
-      query: 'user.name: root or user.name: admin',
-      references: ['test 1', 'test 2'],
-      severity: 'high',
-      updated_by: 'elastic_kibana',
-      tags: [],
-      to: 'now',
-      type: 'query',
-      threat: [],
-      version: 1,
-      output_index: '.siem-signals-hassanabad-frank-default',
-      max_signals: 100,
-      risk_score: 55,
-      language: 'kuery',
-      rule_id: 'query-rule-id',
-      interval: '5m',
-      status: 'succeeded',
-      status_date: '2020-02-22T16:47:50.047Z',
-      last_success_at: '2020-02-22T16:47:50.047Z',
-      last_success_message: 'succeeded',
-    });
-  });
-});
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.test.ts b/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.test.ts
index ec8db77dac72..772ebd932698 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.test.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.test.ts
@@ -15,7 +15,7 @@ import {
   formatQuery,
   getLanguageBooleanOperator,
 } from './build_exceptions_query';
-import { List } from '../routes/schemas/types/lists_default_array';
+import { List } from '../../../../common/detection_engine/schemas/types/lists_default_array';
 
 describe('build_exceptions_query', () => {
   describe('getLanguageBooleanOperator', () => {
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.ts b/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.ts
index e7be5025a51f..b33a2376589e 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/signals/build_exceptions_query.ts
@@ -3,8 +3,12 @@
  * or more contributor license agreements. Licensed under the Elastic License;
  * you may not use this file except in compliance with the Elastic License.
  */
+import {
+  ListOperator,
+  ListValues,
+  List,
+} from '../../../../common/detection_engine/schemas/types/lists_default_array';
 import { Query } from '../../../../../../../src/plugins/data/server';
-import { List, ListOperator, ListValues } from '../routes/schemas/types/lists_default_array';
 import { RuleAlertParams, Language } from '../types';
 
 type Operators = 'and' | 'or' | 'not';
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/signals/filter_events_with_list.ts b/x-pack/plugins/siem/server/lib/detection_engine/signals/filter_events_with_list.ts
index 400bb5dda46e..07435fda0da2 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/signals/filter_events_with_list.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/signals/filter_events_with_list.ts
@@ -6,11 +6,11 @@
 import { get } from 'lodash/fp';
 import { Logger } from 'src/core/server';
 
+import { List } from '../../../../common/detection_engine/schemas/types/lists_default_array';
 import { type } from '../../../../../lists/common/schemas/common';
 import { ListClient } from '../../../../../lists/server';
 import { SignalSearchResponse, SearchTypes } from './types';
 import { RuleAlertParams } from '../types';
-import { List } from '../routes/schemas/types/lists_default_array';
 
 interface FilterEventsAgainstList {
   listClient: ListClient;
diff --git a/x-pack/plugins/siem/server/lib/detection_engine/types.ts b/x-pack/plugins/siem/server/lib/detection_engine/types.ts
index f2026804da51..53c8a9bf0a7e 100644
--- a/x-pack/plugins/siem/server/lib/detection_engine/types.ts
+++ b/x-pack/plugins/siem/server/lib/detection_engine/types.ts
@@ -4,10 +4,10 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
+import { ListsDefaultArraySchema } from '../../../common/detection_engine/schemas/types/lists_default_array';
 import { CallAPIOptions } from '../../../../../../src/core/server';
 import { Filter } from '../../../../../../src/plugins/data/server';
 import { IRuleStatusAttributes } from './rules/types';
-import { ListsDefaultArraySchema } from './routes/schemas/types/lists_default_array';
 import { RuleAlertAction, RuleType } from '../../../common/detection_engine/types';
 
 export type PartialFilter = Partial<Filter>;
diff --git a/x-pack/plugins/siem/server/lib/timeline/routes/import_timelines_route.ts b/x-pack/plugins/siem/server/lib/timeline/routes/import_timelines_route.ts
index 48c6081e855a..c16b73ff51b5 100644
--- a/x-pack/plugins/siem/server/lib/timeline/routes/import_timelines_route.ts
+++ b/x-pack/plugins/siem/server/lib/timeline/routes/import_timelines_route.ts
@@ -7,6 +7,7 @@
 import { extname } from 'path';
 import { chunk, omit } from 'lodash/fp';
 
+import { importRulesSchema } from '../../../../common/detection_engine/schemas/response/import_rules_schema';
 import { createPromiseFromStreams } from '../../../../../../../src/legacy/utils';
 import { IRouter } from '../../../../../../../src/core/server';
 
@@ -16,7 +17,6 @@ import { SetupPlugins } from '../../../plugin';
 import { ConfigType } from '../../../config';
 import { buildRouteValidation } from '../../../utils/build_validation/route_validation';
 
-import { importRulesSchema } from '../../detection_engine/routes/schemas/response/import_rules_schema';
 import { validate } from '../../detection_engine/routes/rules/validate';
 import {
   buildSiemResponse,