fix(tests): Stabilize tests and document chokidar-inspired Node watcher architecture

readme.hints.md

@@ -71,6 +71,57 @@ The `WriteStabilizer` class replaces chokidar's built-in write stabilization:
 - **Deno**: Works on all versions with `Deno.watchFs()`
 - **Bun**: Uses Node.js compatibility layer
 
+### Architecture (v6.3.0+) - Chokidar-Inspired
+
+The Node.js watcher has been refactored with elegant patterns inspired by [chokidar](https://github.com/paulmillr/chokidar):
+
+**DirEntry Class:**
+- Tracks directory contents with proper disposal
+- Encapsulates file tracking and inode management
+- `dispose()` method freezes object to catch use-after-cleanup bugs
+
+**Throttler Pattern:**
+- More sophisticated than simple debounce
+- Tracks count of suppressed events
+- Returns `false` if already throttled, `Throttler` object otherwise
+- Used for change events to prevent duplicate emissions
+
+**Atomic Write Handling:**
+- Unlink events are queued with 100ms delay
+- If add event arrives for same path within delay, unlink is cancelled
+- Emits single `change` event instead of `unlink` + `add`
+- Handles editor atomic saves elegantly
+
+**Closer Registry:**
+- Maps watch paths to cleanup functions
+- Ensures proper resource cleanup on stop
+- `addCloser()` / `runClosers()` pattern
+
+**Event Constants Object:**
+```typescript
+const EV = {
+  ADD: 'add',
+  CHANGE: 'change',
+  UNLINK: 'unlink',
+  ADD_DIR: 'addDir',
+  UNLINK_DIR: 'unlinkDir',
+  READY: 'ready',
+  ERROR: 'error',
+} as const;
+```
+
+**Configuration Constants:**
+```typescript
+const CONFIG = {
+  MAX_RETRIES: 3,
+  INITIAL_RESTART_DELAY: 1000,
+  MAX_RESTART_DELAY: 30000,
+  HEALTH_CHECK_INTERVAL: 30000,
+  ATOMIC_DELAY: 100,
+  TEMP_FILE_DELAY: 50,
+} as const;
+```
+
 ### Robustness Features (v6.1.0+)
 
 The Node.js watcher includes automatic recovery mechanisms based on learnings from [chokidar](https://github.com/paulmillr/chokidar) and known [fs.watch issues](https://github.com/nodejs/node/issues/47058):
@@ -155,10 +206,20 @@ Example log output:
 pnpm test
 ```
 
+Test files:
+- **test.basic.ts** - Core functionality (add, change, unlink events)
+- **test.inode.ts** - Inode change detection, atomic writes
+- **test.stress.ts** - Rapid modifications, many files, interleaved operations
+
 Tests verify:
 - Creating Smartwatch instance
 - Adding glob patterns
-- Receiving 'add' events for new files
+- Receiving 'add', 'change', 'unlink' events
+- Inode change detection (delete+recreate pattern)
+- Atomic write pattern (temp file + rename)
+- Rapid file modifications (debouncing)
+- Many files created rapidly
+- Interleaved add/change/delete operations
 - Graceful shutdown
 
 ## Dev Dependencies