**chore(archive): remove outdated documentation and summaries**

- Deleted the following obsolete files:
  - `CHANGES.md`, `changes-summary.md`, `CHANGES_SUMMARY.md`: Contained redundant or outdated change logs and implementation summaries.
  - `COMPATIBILITY.md`: Detailed compatibility behavior no longer relevant after environment detection updates.
  - `fix-documentation.md`: Addressed a resolved issue regarding `process.memoryUsage` errors in testing.
  - `DIMENSION_MISMATCH_SUMMARY.md`: Provided a legacy summary of resolved embedding dimension mismatch issues.
  - `demo.md`: Documented an outdated demo process for testing Brainy features.
  - `CONCURRENCY_IMPLEMENTATION_SUMMARY.md`: Summarized already-documented concurrency features.
  - `IMPLEMENTATION_SUMMARY.md`: Detailed an obsolete implementation of optional model bundling.

- Purpose:
  - Streamline and declutter archive by removing redundant or outdated documentation.
  - Align repository with current feature set and documentation standards.

docs/technical/ENVIRONMENT_TESTING.md

@@ -0,0 +1,97 @@
+# Testing Brainy Across Different Environments
+
+This document provides instructions for testing Brainy's cache detection functionality across different environments.
+
+## Testing in Node.js Environment
+
+To test Brainy in a Node.js environment:
+
+1. Build the project:
+   ```bash
+   npm run build
+   ```
+
+2. Run the Node.js test script:
+   ```bash
+   node test-cache-detection.js
+   ```
+
+3. Expected output:
+   ```
+   Brainy: Successfully patched TensorFlow.js PlatformNode at module load time
+   Applied TensorFlow.js patch via ES modules in setup.ts
+   Brainy running in Node.js environment
+   Creating BrainyData instance...
+   BrainyData instance created successfully!
+   Test completed successfully!
+   ```
+
+## Testing in Browser Environment
+
+To test Brainy in a browser environment:
+
+1. Build the project:
+   ```bash
+   npm run build
+   ```
+
+2. Start a local web server:
+   ```bash
+   npx http-server -p 8080
+   ```
+
+3. Open the browser test page:
+   ```
+   http://localhost:8080/test-browser-cache-detection.html
+   ```
+
+4. Click the "Run Test" button on the page.
+
+5. Expected results:
+   - The page should display success messages
+   - No errors should appear in the browser console
+   - You should see "BrainyData instance created successfully!" and "Test completed successfully!"
+
+## Testing in Web Worker Environment
+
+To test Brainy in a Web Worker environment:
+
+1. Build the project:
+   ```bash
+   npm run build
+   ```
+
+2. Start a local web server:
+   ```bash
+   npx http-server -p 8080
+   ```
+
+3. Open the worker test page:
+   ```
+   http://localhost:8080/test-worker-cache-detection.html
+   ```
+
+4. Click the "Run Test" button on the page.
+
+5. Expected results:
+   - The page should display success messages from the worker
+   - No errors should appear in the browser console
+   - You should see "BrainyData instance created successfully!" and "Test completed successfully!"
+
+## Compatibility Notes
+
+Brainy's cache detection has been designed to work across all environments:
+
+1. **Node.js Environment**:
+   - Uses fixed default memory values (8GB total, 4GB free) for cache size calculation
+   - This approach ensures compatibility with ES modules
+
+2. **Browser Environment**:
+   - Uses navigator.deviceMemory API when available
+   - Falls back to conservative defaults when the API is not available
+
+3. **Worker Environment**:
+   - Uses a more conservative approach to cache sizing
+   - Automatically detects the worker environment and adjusts accordingly
+
+The cache manager automatically detects the environment and adjusts its behavior to ensure optimal performance in each context.