Add jqhtml component API clarification for LLM agents

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Co-Authored-By: Claude <noreply@anthropic.com>

docs/CLAUDE.dist.md

@@ -668,6 +668,74 @@ on_create() {
 
 **Double-render**: If `on_load()` modifies `this.data`, component renders twice (defaults → populated).
 
+### Component API - CRITICAL FOR LLM AGENTS
+
+This section clarifies common misunderstandings. Read carefully.
+
+**DOM Access Methods:**
+
+| Method | Returns | Purpose |
+|--------|---------|---------|
+| `this.$` | jQuery | Root element of component (stable, survives redraws) |
+| `this.$sid('name')` | jQuery | Child element with `$sid="name"` (always returns jQuery, even if empty) |
+| `this.sid('name')` | Component or null | Child component instance (null if not found or not a component) |
+| `this.$.find('.class')` | jQuery | Standard jQuery find (use when `$sid` isn't appropriate) |
+
+**WRONG:** `this.$el` - This does not exist. Use `this.$`
+
+**The reload() Paradigm - MANDATORY:**
+
+```
+reload() = on_load() → render() → on_ready()
+render() = template redraw only (NO on_ready)
+```
+
+**LLM agents must ALWAYS use `reload()`, NEVER call `render()` directly.**
+
+When you need to refresh a component after a mutation (add, edit, delete), call `this.reload()`. Yes, this makes another server call via `on_load()`. This is intentional. The extra round-trip is acceptable - our server is fast and the paradigm simplicity is worth it.
+
+**WRONG approach (do NOT do this):**
+```javascript
+// ❌ BAD - Trying to be "efficient" by skipping server round-trip
+async add_item() {
+    const new_item = await Controller.add({name: 'Test'});
+    this.data.items.push(new_item);  // ERROR: Cannot modify this.data outside on_load
+    this.render();  // WRONG: Event handlers will break, on_ready won't run
+}
+```
+
+**CORRECT approach:**
+```javascript
+// ✅ GOOD - Clean, consistent, reliable
+async add_item() {
+    await Controller.add({name: 'Test'});
+    this.reload();  // Calls on_load() to refresh this.data, then on_ready() for handlers
+}
+```
+
+**Event Handlers - Set Up in on_ready():**
+
+Event handlers must be registered in `on_ready()`. Since `on_ready()` runs after every `reload()`, handlers automatically reattach when the DOM is redrawn.
+
+```javascript
+on_ready() {
+    this.$sid('save_btn').click(() => this.save());
+    this.$sid('delete_btn').click(() => this.delete());
+}
+```
+
+**WRONG:** Event delegation to avoid `reload()`. If you find yourself writing `this.$.on('click', '[data-sid="btn"]', handler)` to "survive" render calls, you're doing it wrong. Use `reload()` and let `on_ready()` reattach handlers.
+
+**this.data Modification Rules (ENFORCED):**
+
+- `on_create()`: Set defaults only (e.g., `this.data.items = []`)
+- `on_load()`: Fetch and assign from server (e.g., `this.data.items = await Controller.list()`)
+- **Everywhere else**: Read-only. Attempting to modify `this.data` outside these methods throws an error.
+
+**on_render() - LLM Should Not Use:**
+
+`on_render()` exists for human developers doing performance optimization. LLM agents should pretend it doesn't exist. Use `on_ready()` for all post-render DOM work.
+
 ### Loading Pattern
 
 ```javascript