diff --git a/gitnexus/src/core/ingestion/class-extractors/configs/ruby.ts b/gitnexus/src/core/ingestion/class-extractors/configs/ruby.ts
index 13f1fdd43..bc57d8926 100644
--- a/gitnexus/src/core/ingestion/class-extractors/configs/ruby.ts
+++ b/gitnexus/src/core/ingestion/class-extractors/configs/ruby.ts
@@ -1,13 +1,62 @@
 // gitnexus/src/core/ingestion/class-extractors/configs/ruby.ts
 
 import { SupportedLanguages } from 'gitnexus-shared';
-import type { ClassExtractionConfig } from '../../class-types.js';
+import type { ClassLikeNodeLabel, ClassExtractionConfig } from '../../class-types.js';
+import type { SyntaxNode } from '../../utils/ast-helpers.js';
+
+export type RubyFactoryType = ClassLikeNodeLabel | 'Trait';
+
+/**
+ * Return the type synthesized by Ruby's allowlisted class factories.
+ *
+ * `Const = Struct.new(...) do ... end` and its siblings all use the same
+ * assignment/call/block grammar shape as arbitrary block-taking calls, so
+ * the receiver and method must both be checked before treating the block as a
+ * type container.
+ */
+export const rubyFactoryType = (node: SyntaxNode): RubyFactoryType | undefined => {
+  if (node.type !== 'do_block' && node.type !== 'block') return undefined;
+  const call = node.parent;
+  if (call?.type !== 'call' || call.childForFieldName?.('block') !== node) return undefined;
+
+  const receiver = call.childForFieldName?.('receiver')?.text;
+  const method = call.childForFieldName?.('method')?.text;
+  if (method !== 'new' && method !== 'define') return undefined;
+
+  if (receiver === 'Struct' && method === 'new') return 'Struct';
+  if (receiver === 'Data' && method === 'define') return 'Class';
+  if (receiver === 'Class' && method === 'new') return 'Class';
+  if (receiver === 'Module' && method === 'new') return 'Trait';
+  return undefined;
+};
+
+export const rubyFactoryBindingName = (node: SyntaxNode): string | undefined => {
+  if (rubyFactoryType(node) === undefined) return undefined;
+  const assignment = node.parent?.parent;
+  if (
+    assignment?.type !== 'assignment' ||
+    assignment.childForFieldName?.('right') !== node.parent
+  ) {
+    return undefined;
+  }
+  const left = assignment.childForFieldName?.('left');
+  return left?.type === 'constant' ? left.text : undefined;
+};
 
 export const rubyClassConfig: ClassExtractionConfig = {
   language: SupportedLanguages.Ruby,
-  typeDeclarationNodes: ['class'],
-  ancestorScopeNodeTypes: ['module', 'class'],
+  typeDeclarationNodes: ['class', 'do_block', 'block'],
+  ancestorScopeNodeTypes: ['module', 'class', 'do_block', 'block'],
   // #1978: key nested-type nodes by their fully-qualified path (Outer.Inner) so
   // same-tail classes nested under different modules stay distinct.
   qualifiedNodeId: true,
+  extractScopeSegments: (node) => {
+    const factoryName = rubyFactoryBindingName(node);
+    return factoryName ? [factoryName] : undefined;
+  },
+  extractName: (node) => rubyFactoryBindingName(node),
+  extractType: (node) => {
+    const type = rubyFactoryType(node);
+    return type === 'Trait' ? undefined : type;
+  },
 };
diff --git a/gitnexus/src/core/ingestion/languages/ruby.ts b/gitnexus/src/core/ingestion/languages/ruby.ts
index 6b2a4b59d..63bd9b3a6 100644
--- a/gitnexus/src/core/ingestion/languages/ruby.ts
+++ b/gitnexus/src/core/ingestion/languages/ruby.ts
@@ -10,7 +10,11 @@
 import { SupportedLanguages } from 'gitnexus-shared';
 import type { NodeLabel } from 'gitnexus-shared';
 import { createClassExtractor } from '../class-extractors/generic.js';
-import { rubyClassConfig } from '../class-extractors/configs/ruby.js';
+import {
+  rubyClassConfig,
+  rubyFactoryBindingName,
+  rubyFactoryType,
+} from '../class-extractors/configs/ruby.js';
 import { defineLanguage } from '../language-provider.js';
 import type { AstFrameworkPatternConfig } from '../language-provider.js';
 import { createLeadingDocDescriptionExtractor, type SyntaxNode } from '../utils/ast-helpers.js';
@@ -142,6 +146,9 @@ const BUILT_INS: ReadonlySet<string> = new Set([
  * All other container types are returned as-is.
  */
 const rubyResolveEnclosingOwner = (node: SyntaxNode): SyntaxNode | null => {
+  if (node.type === 'do_block' || node.type === 'block') {
+    return rubyFactoryType(node) === undefined ? null : node;
+  }
   if (node.type === 'singleton_class') {
     let ancestor = node.parent;
     while (ancestor) {
@@ -155,6 +162,21 @@ const rubyResolveEnclosingOwner = (node: SyntaxNode): SyntaxNode | null => {
   return node; // use as-is for all other container types
 };
 
+const rubyClassExtractor = createClassExtractor(rubyClassConfig);
+
+const rubyResolveContainerTypeOwner = (
+  node: SyntaxNode,
+): { readonly name: string; readonly label: NodeLabel } | null => {
+  const name = rubyFactoryBindingName(node);
+  const label = rubyFactoryType(node);
+  if (name === undefined || label === undefined) return null;
+  const qualifiedName =
+    label === 'Trait'
+      ? rubyClassExtractor.qualifyScopeName?.(node, name)
+      : rubyClassExtractor.extractQualifiedName(node, name);
+  return { name: qualifiedName ?? name, label };
+};
+
 export const rubyProvider = defineLanguage({
   id: SupportedLanguages.Ruby,
   extensions: ['.rb', '.rake', '.gemspec'],
@@ -190,13 +212,14 @@ export const rubyProvider = defineLanguage({
   callRouter: routeRubyCall,
   callExtractor: createCallExtractor(rubyCallConfig),
   resolveEnclosingOwner: rubyResolveEnclosingOwner,
+  resolveContainerTypeOwner: rubyResolveContainerTypeOwner,
   fieldExtractor: createFieldExtractor(rubyFieldConfig),
   methodExtractor: createMethodExtractor({
     ...rubyMethodConfig,
     extractFunctionName: rubyExtractFunctionName,
   }),
   variableExtractor: createVariableExtractor(rubyVariableConfig),
-  classExtractor: createClassExtractor(rubyClassConfig),
+  classExtractor: rubyClassExtractor,
   // ── Leading `#` comments (RDoc/YARD) → description (issue #2270). Magic
   //    comments and the shebang are not documentation. ──
   descriptionExtractor: createLeadingDocDescriptionExtractor({
diff --git a/gitnexus/src/core/ingestion/tree-sitter-queries.ts b/gitnexus/src/core/ingestion/tree-sitter-queries.ts
index fbde18729..efc733844 100644
--- a/gitnexus/src/core/ingestion/tree-sitter-queries.ts
+++ b/gitnexus/src/core/ingestion/tree-sitter-queries.ts
@@ -2227,6 +2227,80 @@ export const RUBY_QUERIES = `
 (class
   name: (scope_resolution) @name) @definition.class
 
+; Ruby class-like factories. Keep this allowlist exact: arbitrary block-taking
+; calls use the same AST shape and must remain ordinary lexical blocks.
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (do_block) @definition.struct))
+  (#eq? @_factory.receiver "Struct")
+  (#eq? @_factory.method "new"))
+
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (block) @definition.struct))
+  (#eq? @_factory.receiver "Struct")
+  (#eq? @_factory.method "new"))
+
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (do_block) @definition.class))
+  (#eq? @_factory.receiver "Data")
+  (#eq? @_factory.method "define"))
+
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (block) @definition.class))
+  (#eq? @_factory.receiver "Data")
+  (#eq? @_factory.method "define"))
+
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (do_block) @definition.class))
+  (#eq? @_factory.receiver "Class")
+  (#eq? @_factory.method "new"))
+
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (block) @definition.class))
+  (#eq? @_factory.receiver "Class")
+  (#eq? @_factory.method "new"))
+
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (do_block))) @definition.module
+  (#eq? @_factory.receiver "Module")
+  (#eq? @_factory.method "new"))
+
+((assignment
+  left: (constant) @name
+  right: (call
+    receiver: (constant) @_factory.receiver
+    method: (identifier) @_factory.method
+    block: (block))) @definition.module
+  (#eq? @_factory.receiver "Module")
+  (#eq? @_factory.method "new"))
+
 ; ── Instance methods ─────────────────────────────────────────────────────────
 (method
   name: (identifier) @name) @definition.method
diff --git a/gitnexus/src/core/ingestion/utils/ast-helpers.ts b/gitnexus/src/core/ingestion/utils/ast-helpers.ts
index 3af6d29f4..f78ba4f64 100644
--- a/gitnexus/src/core/ingestion/utils/ast-helpers.ts
+++ b/gitnexus/src/core/ingestion/utils/ast-helpers.ts
@@ -1010,6 +1010,24 @@ export const findEnclosingClassInfo = (
         };
       }
     }
+    // Ruby's class factories wrap their members in a `do_block`, which is also
+    // the shape of ordinary iteration/callback blocks and therefore cannot join
+    // the global container set. Let the Ruby hooks jointly opt an exact factory
+    // shape in; arbitrary blocks fall through to their lexical owner unchanged.
+    if (
+      (current.type === 'do_block' || current.type === 'block') &&
+      resolveEnclosingOwner !== undefined &&
+      resolveContainerTypeOwner !== undefined &&
+      resolveEnclosingOwner(current) === current
+    ) {
+      const syntheticOwner = resolveContainerTypeOwner(current, filePath);
+      if (syntheticOwner !== null) {
+        return {
+          classId: generateId(syntheticOwner.label, `${filePath}:${syntheticOwner.name}`),
+          className: syntheticOwner.name,
+        };
+      }
+    }
     if (CLASS_CONTAINER_TYPES.has(current.type)) {
       // Delegate language-specific container remapping to the provider hook.
       if (resolveEnclosingOwner) {
diff --git a/gitnexus/test/integration/ruby-factory-block-owner.test.ts b/gitnexus/test/integration/ruby-factory-block-owner.test.ts
new file mode 100644
index 000000000..2140ab6a6
--- /dev/null
+++ b/gitnexus/test/integration/ruby-factory-block-owner.test.ts
@@ -0,0 +1,158 @@
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+import { afterAll, beforeAll, describe, expect, it } from 'vitest';
+import {
+  getRelationships,
+  runPipelineFromRepo,
+  writeFixtureRepo,
+  type PipelineResult,
+} from './resolvers/helpers.js';
+
+describe('Ruby block-taking factory ownership', () => {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'gitnexus-ruby-factory-owner-'));
+  let result: PipelineResult;
+
+  beforeAll(async () => {
+    writeFixtureRepo(root, {
+      'app.rb': `
+class Outer
+  StructType = Struct.new(:value) do
+    def struct_method = value
+  end
+
+  DataType = Data.define(:value) do
+    def data_method = value
+  end
+
+  ClassType = Class.new do
+    def class_method = 1
+  end
+
+  ModuleType = Module.new do
+    def module_method = 1
+  end
+
+  BraceStructType = Struct.new(:value) {
+    def brace_struct_method = value
+  }
+
+  BraceDataType = Data.define(:value) {
+    def brace_data_method = value
+  }
+
+  BraceClassType = Class.new {
+    def brace_class_method = 1
+  }
+
+  BraceModuleType = Module.new {
+    def brace_module_method = 1
+  }
+
+  ArbitraryType = Builder.make do
+    def arbitrary_method = 1
+  end
+
+  module Nested
+    ClassType = Class.new do
+      def nested_class_method = 1
+    end
+  end
+
+  First = Class.new do
+    Item = Class.new do
+      def first_item_method = 1
+    end
+  end
+
+  Second = Class.new do
+    Item = Class.new do
+      def second_item_method = 1
+    end
+  end
+end
+`,
+    });
+    result = await runPipelineFromRepo(root, () => {}, { skipGraphPhases: true });
+  }, 120_000);
+
+  afterAll(() => {
+    fs.rmSync(root, { recursive: true, force: true });
+  });
+
+  it.each([
+    ['StructType', 'Struct', 'struct_method', 'Outer.StructType'],
+    ['DataType', 'Class', 'data_method', 'Outer.DataType'],
+    ['ClassType', 'Class', 'class_method', 'Outer.ClassType'],
+    ['ModuleType', 'Trait', 'module_method', 'Outer.ModuleType'],
+    ['BraceStructType', 'Struct', 'brace_struct_method', 'Outer.BraceStructType'],
+    ['BraceDataType', 'Class', 'brace_data_method', 'Outer.BraceDataType'],
+    ['BraceClassType', 'Class', 'brace_class_method', 'Outer.BraceClassType'],
+    ['BraceModuleType', 'Trait', 'brace_module_method', 'Outer.BraceModuleType'],
+  ])(
+    'materializes %s as a %s and attributes its factory-block method',
+    (owner, ownerLabel, method, qualifiedOwner) => {
+      const ownerNode = result.graph.nodes.find(
+        (node) =>
+          node.label === ownerLabel &&
+          node.properties.name === owner &&
+          node.id.includes(qualifiedOwner),
+      );
+      const ownership = getRelationships(result, 'HAS_METHOD').filter(
+        (edge) => edge.target === method,
+      );
+
+      expect(ownerNode).toBeDefined();
+      expect(ownership.map((edge) => edge.rel.sourceId)).toEqual([ownerNode?.id]);
+    },
+  );
+
+  it('does not treat an arbitrary block-taking call as a class factory', () => {
+    const syntheticOwner = result.graph.nodes.find(
+      (node) =>
+        ['Class', 'Struct', 'Trait'].includes(node.label) &&
+        node.properties.name === 'ArbitraryType',
+    );
+    const ownership = getRelationships(result, 'HAS_METHOD').filter(
+      (edge) => edge.target === 'arbitrary_method',
+    );
+
+    expect(syntheticOwner).toBeUndefined();
+    expect(ownership.map((edge) => edge.source)).toEqual(['Outer']);
+  });
+
+  it('keeps same-tail factory constants distinct across nested lexical scopes', () => {
+    const owners = result.graph.nodes.filter(
+      (node) => node.label === 'Class' && node.properties.name === 'ClassType',
+    );
+    const ownership = getRelationships(result, 'HAS_METHOD').filter(
+      (edge) => edge.target === 'nested_class_method',
+    );
+
+    expect(owners).toHaveLength(2);
+    expect(new Set(owners.map((node) => node.id)).size).toBe(2);
+    const nestedOwner = owners.find((node) => node.id.includes('Outer.Nested.ClassType'));
+    expect(nestedOwner).toBeDefined();
+    expect(ownership.map((edge) => edge.rel.sourceId)).toEqual([nestedOwner?.id]);
+  });
+
+  it('keeps same-tail factories distinct when nested inside factory blocks', () => {
+    const owners = result.graph.nodes.filter(
+      (node) => node.label === 'Class' && node.properties.name === 'Item',
+    );
+    const firstOwner = owners.find((node) => node.id.includes('Outer.First.Item'));
+    const secondOwner = owners.find((node) => node.id.includes('Outer.Second.Item'));
+    const firstOwnership = getRelationships(result, 'HAS_METHOD').filter(
+      (edge) => edge.target === 'first_item_method',
+    );
+    const secondOwnership = getRelationships(result, 'HAS_METHOD').filter(
+      (edge) => edge.target === 'second_item_method',
+    );
+
+    expect(owners).toHaveLength(2);
+    expect(firstOwner).toBeDefined();
+    expect(secondOwner).toBeDefined();
+    expect(firstOwnership.map((edge) => edge.rel.sourceId)).toEqual([firstOwner?.id]);
+    expect(secondOwnership.map((edge) => edge.rel.sourceId)).toEqual([secondOwner?.id]);
+  });
+});