**chore: remove outdated changelog and summary documents**

- Deleted `CHANGES.md`, `CHANGES_SUMMARY.md`, `CONCURRENCY_ANALYSIS.md`, `CONCURRENCY_IMPLEMENTATION_SUMMARY.md`, and related developer documentation files.
- Removed redundant or legacy content no longer aligned with the current codebase and workflows.
- Updated repository to reflect streamlined documentation approach, reducing clutter and improving maintainability.

**Purpose**: Simplify and declutter repository by removing obsolete documentation files, ensuring it remains focused and relevant.

docs/development/DOCUMENTATION_STANDARDS.md

@@ -0,0 +1,153 @@
+# Documentation Standards for Brainy
+
+<div align="center">
+<img src="./brainy.png" alt="Brainy Logo" width="200"/>
+</div>
+
+This document outlines the documentation standards and conventions for the Brainy project, including markdown file naming conventions and troubleshooting information for common documentation issues.
+
+## Table of Contents
+
+- [Markdown File Naming Conventions](#markdown-file-naming-conventions)
+- [Documentation Troubleshooting](#documentation-troubleshooting)
+
+## Markdown File Naming Conventions
+
+Based on the current project structure, we follow these conventions for markdown files:
+
+### Uppercase Naming
+
+Use uppercase filenames for project-level documentation:
+
+- README.md - Project overview and main documentation
+- CONTRIBUTING.md - Contribution guidelines
+- LICENSE.md - License information
+- CHANGES.md - Changelog
+- CODE_OF_CONDUCT.md - Code of conduct
+- Other project-level documentation files
+
+Examples: `README.md`, `CONTRIBUTING.md`, `CODE_OF_CONDUCT.md`
+
+### Lowercase Naming
+
+Use lowercase filenames for technical documentation and implementation details:
+
+- Technical guides
+- Implementation details
+- Architecture documentation
+- Specific feature documentation
+
+Examples: `scalingStrategy.md`, `statistics.md`
+
+## Rationale
+
+This convention makes it easy to distinguish between:
+
+1. Project-level documentation that applies to the entire project and is relevant to all contributors and users (uppercase)
+2. Technical documentation that focuses on specific implementation details and is primarily relevant to developers working on those features (lowercase)
+
+## Recommendations
+
+1. Continue using uppercase names for project-level documentation files
+2. Continue using lowercase names for technical documentation files
+3. Be consistent within each category
+4. Always use `README.md` (uppercase) for directory-level documentation
+
+## Examples
+
+### Project-Level Documentation (Uppercase)
+
+- README.md
+- CONTRIBUTING.md
+- LICENSE.md
+- CHANGES.md
+- CODE_OF_CONDUCT.md
+- DEVELOPERS.md
+- STORAGE_TESTING.md
+- THREADING.md
+
+### Technical Documentation (Lowercase)
+
+- scalingStrategy.md
+- statistics.md
+- architecture.md
+- implementation-details.md
+
+By following these conventions, we maintain consistency and make it easier for contributors to find the right documentation.
+
+## Documentation Troubleshooting
+
+This section covers common documentation-related issues and their solutions.
+
+### Fix for "process.memoryUsage is not a function" Error in Vitest
+
+#### Issue
+During test runs with Vitest, the following error was occurring:
+
+```
+TypeError: process.memoryUsage is not a function
+ ❯ VitestTestRunner.onAfterRunSuite node_modules/vitest/dist/runners.js:150:95
+```
+
+This error was happening because Vitest was trying to use `process.memoryUsage()` to log heap usage statistics, but this function was not available in the current environment.
+
+#### Solution
+The issue was fixed by disabling the heap usage logging in the Vitest configuration:
+
+In `vitest.config.ts`, changed:
+```typescript
+// Show test statistics
+logHeapUsage: true,
+```
+
+To:
+```typescript
+// Show test statistics
+logHeapUsage: false,
+```
+
+#### Explanation
+The `logHeapUsage` option in Vitest attempts to use Node.js's `process.memoryUsage()` function to track and report memory usage during test runs. However, this function might not be available in all environments, particularly in certain browser-like environments or when using specific Node.js versions or configurations.
+
+By setting `logHeapUsage: false`, we prevent Vitest from attempting to call this function, which resolves the error while still allowing tests to run successfully.
+
+#### Verification
+After making this change, the tests run without any unhandled errors, confirming that the issue has been resolved.
+
+### Common Documentation Issues and Solutions
+
+#### Issue: Inconsistent Markdown Formatting
+
+**Symptoms**: Inconsistent heading levels, list formatting, or code block syntax across documentation files.
+
+**Solution**: 
+- Use a markdown linter to enforce consistent formatting
+- Follow the project's markdown style guide
+- Use the same heading structure across similar documents
+
+#### Issue: Broken Links in Documentation
+
+**Symptoms**: Links to other documentation files or sections within files don't work.
+
+**Solution**:
+- Use relative links for references to other files in the repository
+- Use anchor links for references to sections within the same file
+- Regularly check for broken links, especially after moving or renaming files
+
+#### Issue: Outdated Documentation
+
+**Symptoms**: Documentation describes features or APIs that have changed or been removed.
+
+**Solution**:
+- Update documentation as part of the same PR that changes the code
+- Add a "Last Updated" date to documentation files
+- Regularly review and update documentation
+
+#### Issue: Missing Documentation
+
+**Symptoms**: Features or APIs lack documentation, making them difficult to use.
+
+**Solution**:
+- Require documentation for new features as part of the PR review process
+- Create documentation templates for common types of documentation
+- Identify and prioritize documentation gaps