diff --git a/.claude/settings.local.json b/.claude/settings.local.json
new file mode 100644
index 0000000..0ee7c91
--- /dev/null
+++ b/.claude/settings.local.json
@@ -0,0 +1,27 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(mkdir:*)",
+      "Bash(bundle exec standardrb:*)",
+      "Bash(rake test:*)",
+      "Bash(ruby -Itest:*)",
+      "Bash(cat:*)",
+      "Bash(CI=1 bundle exec rake:*)",
+      "Bash(afplay:*)",
+      "Bash(ruby -Ilib:test -e:*)",
+      "Bash(open:*)",
+      "Bash(ruby -Ilib:test test/activerecord/test_null.rb -n \"/accesses attribute with symbol key/\" -v)",
+      "WebSearch",
+      "Bash(ruby -e:*)",
+      "Bash(CI=1 ruby:*)",
+      "Bash(bundle exec gem list:*)",
+      "Bash(CI=1 bundle exec ruby:*)",
+      "Bash(bundle exec ruby:*)",
+      "Bash(ruby test_no_db_access.rb:*)",
+      "Bash(bundle exec rake test:*)",
+      "Bash(git commit:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..ded2440
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,108 @@
+# CLAUDE.md
+
+> Project instructions for AI assistants working on activerecord-null gem
+
+## Agent OS Documentation
+
+### Product Context
+- **Mission & Vision:** @.agent-os/product/mission.md
+- **Technical Architecture:** @.agent-os/product/tech-stack.md
+- **Development Roadmap:** @.agent-os/product/roadmap.md
+- **Decision History:** @.agent-os/product/decisions.md
+
+### Development Standards
+- **Code Style:** @~/.agent-os/standards/code-style.md
+- **Best Practices:** @~/.agent-os/standards/best-practices.md
+
+### Project Management
+- **Active Specs:** @.agent-os/specs/
+- **Spec Planning:** Use `@~/.agent-os/instructions/create-spec.md`
+- **Tasks Execution:** Use `@~/.agent-os/instructions/execute-tasks.md`
+
+## Workflow Instructions
+
+When asked to work on this codebase:
+
+1. **First**, check @.agent-os/product/roadmap.md for current priorities
+2. **Then**, follow the appropriate instruction file:
+   - For new features: @~/.agent-os/instructions/create-spec.md
+   - For tasks execution: @~/.agent-os/instructions/execute-tasks.md
+3. **Always**, adhere to the standards in the files listed above
+
+## Important Notes
+
+- Product-specific files in `.agent-os/product/` override any global standards
+- User's specific instructions override (or amend) instructions found in `.agent-os/specs/...`
+- Always adhere to established patterns, code style, and best practices documented above
+
+## Project-Specific Guidelines
+
+### This is a Ruby Gem Library
+
+This is NOT a Rails application - it's a library gem that extends ActiveRecord. Keep this context in mind:
+
+- No application hosting, database hosting, or asset hosting
+- Focus is on library code quality, API design, and compatibility
+- Tests use SQLite3 in-memory database
+- Must maintain backward compatibility within major versions
+
+### Code Style Enforcement
+
+Before committing, ALWAYS run:
+```bash
+bundle exec standardrb --fix
+```
+
+All code must pass Standard linting. No exceptions.
+
+### Testing Requirements
+
+- Use Minitest (not RSpec)
+- All new features must have comprehensive test coverage
+- Run tests with: `rake test` (default rake task)
+- Tests are in `test/` directory following Minitest conventions
+
+### Release Process
+
+This gem uses Reissue for release management:
+
+1. Use git trailers for changelog entries in commits
+2. Run `rake build:checksum` to build gem and generate checksums
+3. Run `rake release` to create git tag, push commits/tags, and push to RubyGems
+4. Reissue automatically increments version and updates changelog
+
+**Never manually edit:**
+- `lib/activerecord/null/version.rb` (managed by Reissue)
+- `CHANGELOG.md` (generated from git trailers)
+
+### ActiveRecord Compatibility
+
+- Minimum ActiveRecord version: 7.0
+- Minimum Ruby version: 3.0.0
+- Test against multiple ActiveRecord versions if adding complex features
+- Be mindful of ActiveRecord's reflection API and association internals
+
+### Design Philosophy
+
+From @.agent-os/product/decisions.md:
+
+1. **Drop-in Replacement:** Null objects should work anywhere real records work
+2. **Singleton Pattern:** One null object instance per model class
+3. **Zero Configuration:** Associations and attributes work automatically
+4. **Simple API:** Creating null objects should be easy and obvious
+
+### Current Phase
+
+Per @.agent-os/product/roadmap.md, we are in **Phase 1: Edge Case Exploration**
+
+Focus areas:
+- Finding and fixing edge cases
+- Testing complex association scenarios
+- Ensuring production-ready stability
+- Documenting limitations and known issues
+
+When proposing new features, consider whether they:
+1. Fix an edge case or bug
+2. Improve compatibility with Rails ecosystem
+3. Maintain API simplicity
+4. Are backwards compatible
diff --git a/lib/activerecord/null/mimic.rb b/lib/activerecord/null/mimic.rb
index 7b619b4..897d649 100644
--- a/lib/activerecord/null/mimic.rb
+++ b/lib/activerecord/null/mimic.rb
@@ -14,7 +14,7 @@ def self.mimics(mimic_model_class)
 
         def self.mimic_model_class = @mimic_model_class
 
-        def self.table_name = @mimic_model_class.to_s.tableize
+        def self.table_name = @mimic_model_class.table_name
 
         def self.primary_key = @mimic_model_class.primary_key
 
diff --git a/test/activerecord/test_void.rb b/test/activerecord/test_void.rb
index af86c82..e7b1f68 100644
--- a/test/activerecord/test_void.rb
+++ b/test/activerecord/test_void.rb
@@ -229,8 +229,7 @@ def self.name
 
   describe "model integration" do
     it "respects table_name from parent model" do
-      # Note: Mimic module uses tableized class name, not parent's custom table_name
-      assert_equal "products", Product::Void.table_name
+      assert_equal Product.table_name, Product::Void.table_name
     end
 
     it "respects primary_key from parent model" do