diff --git a/docs/plans/improve-ui-ux.md b/docs/plans/improve-ui-ux.md
index 7bc903c..7f121c8 100644
--- a/docs/plans/improve-ui-ux.md
+++ b/docs/plans/improve-ui-ux.md
@@ -1,43 +1,64 @@
-# Plan: Improve UI/UX of All Examples (Issue #51)
+# Plan: Improve UI/UX — Todos as Showcase + Shared CSS + CSP Compliance
 
-## Problem
+## Context
 
-The examples lack visual polish and consistency. Content stretches too wide, buttons are oversized for their context, controls are spread across multiple rows wasting vertical space, and each example feels like it was built by a different person. Additionally, there are inline styles/JS violating CLAUDE.md and missing accessibility attributes. The goal is to produce cohesive, production-quality examples with tight visual design and establish guidelines for future apps.
+The examples lack visual consistency, have CSP violations (inline JS/styles), and the `livetemplate.css` in the client repo is underutilized (only 25 lines of CSS custom property defaults). The todos example should become the flagship showcase for the main README, demonstrating LiveTemplate's top features with minimal, readable code. UX extends to code readability — templates should be standard HTML with lvt attributes only when truly needed.
 
-## Approach
+This plan supersedes the previous UI/UX improvement plan with the latest library capabilities (client v0.8.19), CSP compliance, and showcase-first approach.
 
-1. Use livetemplate/client/livetemplate.css to create common visual utilities (narrow container, compact buttons, visually-hidden)
-2. Apply visual improvements to every template: narrow focused layout, compact action buttons, single-row toolbars, breathing space
-3. Clean up code hygiene: remove inline styles/JS, fix accessibility
-4. Update CLAUDE.md with established visual and coding standards
-5. Verify all tests still pass
+**Prerequisites**: Before starting implementation, update all dependencies to their latest versions:
+- `github.com/livetemplate/livetemplate` — latest release
+- `github.com/livetemplate/lvt` — latest pseudo-version
+- `@livetemplate/client` — latest release (currently v0.8.19)
 
----
-
-## Visual Design Principles
+Run `go get -u` in each example's `go.mod` and update CDN script tags to pin the latest client version.
 
-These apply to ALL examples:
+---
 
-1. **Narrow, focused layout** — All examples are single-purpose apps. Constrain content to ~640px max-width for a focused feel with breathing space on wider screens.
-2. **Single-row toolbars** — Group related controls (search + sort, action buttons) into one horizontal row using `<fieldset role="group">` or `<nav>`.
-3. **Compact action buttons** — Inline action buttons (delete, toggle, remove) should be small, not full-height Pico buttons. Use a `.compact` utility class.
-4. **Consistent card structure** — Every example: `<article>` card with `<hgroup>` header (title + subtitle), content, optional footer.
-5. **Visual hierarchy** — Primary actions get prominent buttons; secondary/destructive actions get `outline` or `secondary` styling and smaller size.
-6. **Breathing space** — Let Pico's natural spacing work; don't stack multiple full-width elements unnecessarily.
+## Progress Tracker
+
+| # | Task | Status | Depends On |
+|---|------|--------|------------|
+| 1 | Extend `livetemplate.css` with semantic utilities + chat styles | ⬜ | — |
+| 2 | Publish CSS in client `package.json` files array | ⬜ | 1 |
+| 3 | Todos template: CSP fix, layout, showcase lvt-* features | ⬜ | 1 |
+| 4 | Todos Go code: simplify toggle, serve CSS | ⬜ | 3 |
+| 5 | Fix all other templates (universal + per-example) | ⬜ | 1 |
+| 6 | Go controller changes (notepad Change(), CSS serving) | ⬜ | 5 |
+| 7 | Update CLAUDE.md with new constraints | ⬜ | 3, 5 |
+| 8 | Update README with showcase section | ⬜ | 3 |
+| 9 | Run `./test-all.sh`, fix breakage | ⬜ | all above |
+| 10 | Record two-tab demo GIF | ⬜ | 9 |
+| 11 | Clean up stale binaries (todos-components, todos-progressive, profile-progressive) | ⬜ | — |
 
 ---
 
-## Phase 1: Use Shared CSS (`livetemplate.css`)
+## Phase 1: Shared CSS Infrastructure
+
+### 1a. Extend `livetemplate.css` (in client repo)
 
-Use `../client/livetemplate.css` (relative to examples root) with reusable utilities:
+Keep existing CSS custom property defaults, add semantic utilities that all examples share:
 
 ```css
+/* === Existing: lvt-fx:* directive defaults === */
+:root {
+  --lvt-scroll-behavior: auto;
+  --lvt-scroll-threshold: 100;
+  --lvt-highlight-duration: 500;
+  --lvt-highlight-color: #ffc107;
+  --lvt-animate-duration: 300;
+}
+
+/* === Layout === */
+
 /* Narrow container for focused, single-purpose apps */
 :root {
   --pico-container-max-width: 640px;
 }
 
-/* Compact action buttons for inline use in tables and toolbars */
+/* === Utility Classes === */
+
+/* Compact buttons/inputs for inline use in tables and toolbars */
 .compact {
   --pico-form-element-spacing-vertical: 0.25rem;
   --pico-form-element-spacing-horizontal: 0.5rem;
@@ -58,162 +79,347 @@ Use `../client/livetemplate.css` (relative to examples root) with reusable utili
   border: 0;
 }
 
-/* Inline form — no margin, for embedding in tables/toolbars */
+/* Zero-margin form for embedding in tables/toolbars */
 .inline {
   margin: 0;
 }
+
+/* === Chat / Message List === */
+
+/* Scrollable message container */
+.messages {
+  border: 1px solid var(--pico-muted-border-color);
+  border-radius: var(--pico-border-radius);
+  padding: 1rem;
+  height: 400px;
+  overflow-y: auto;
+  background: var(--pico-card-background-color);
+  margin-bottom: 1rem;
+}
+
+/* Individual message card */
+.message {
+  padding: 0.75rem;
+  margin-bottom: 0.5rem;
+  border-radius: var(--pico-border-radius);
+  border-left: 3px solid var(--pico-muted-border-color);
+  background: var(--pico-background-color);
+}
+
+/* Own message highlight */
+.message.mine {
+  background: var(--pico-primary-background);
+  border-left-color: var(--pico-primary);
+}
 ```
 
-**Rationale**: These four utilities address the core visual problems:
-- `--pico-container-max-width: 640px` → narrow focused layout (breathing space on wide screens)
-- `.compact` → smaller buttons for inline actions (delete, toggle, remove)
-- `.visually-hidden` → accessible hidden labels
-- `.inline` → forms embedded in table cells/toolbars without extra margin
+### 1b. Update client `package.json`
 
-All examples will link this via npm.
+Add `"livetemplate.css"` to the `files` array so it's published to npm:
+
+```json
+"files": [
+  "dist/**/*",
+  "livetemplate.css",
+  "README.md",
+  "LICENSE"
+]
+```
+
+### 1c. Serving pattern for examples
+
+Each example's `main.go` serves the CSS locally. Add a helper in `e2etest` or use `http.ServeFile`:
+
+```go
+http.HandleFunc("/livetemplate.css", func(w http.ResponseWriter, r *http.Request) {
+    http.ServeFile(w, r, "../client/livetemplate.css")  // relative to example dir
+})
+```
+
+Templates link it conditionally:
+```html
+{{ if .lvt.DevMode }}
+  <link rel="stylesheet" href="/livetemplate.css">
+{{ else }}
+  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@livetemplate/client@latest/livetemplate.css">
+{{ end }}
+```
 
 ---
 
-## Phase 2: Universal HTML & Visual Fixes (All Templates)
+## Phase 2: Todos as Showcase
+
+### Critical files
+- `todos/todos.tmpl`
+- `todos/controller.go`
+- `todos/state.go`
+- `todos/main.go`
+- `todos/todos_test.go`
+
+### 2a. CSP fix — checkbox toggle (line 83 of todos.tmpl)
+
+**Before** (CSP violation):
+```html
+<form method="POST" name="toggle">
+  <input type="hidden" name="id" value="{{ .ID }}" />
+  <input type="checkbox" {{ if .Completed }}checked{{ end }}
+    onchange="this.form.requestSubmit()" aria-label="Toggle completion" />
+  <button type="submit" name="toggle" hidden>Toggle</button>
+</form>
+```
+
+**After** (CSP-safe, using existing `lvt-on:change`):
+```html
+<input type="checkbox"
+  {{ if .Completed }}checked{{ end }}
+  lvt-on:change="toggle"
+  data-id="{{ .ID }}"
+  aria-label="Toggle completion" />
+```
+
+The entire form wrapper, hidden input, and hidden button are eliminated. The `data-id` standard attribute passes the todo ID to the `Toggle()` action via `ctx.GetString("id")`.
+
+**Controller change** (`controller.go` Toggle method): Update to read `id` from data attributes instead of form data. The `lvt-on:change` event delegation collects `data-*` attributes automatically.
+
+### 2b. HTML hygiene
+
+1. Remove `data-theme="light"` from `<html>` tag
+2. Add `<meta name="color-scheme" content="light dark">` to `<head>` — enables automatic dark mode via Pico CSS
+3. Remove entire `<style>` block — `.visually-hidden` now in shared CSS
+4. Link shared CSS in `<head>`
+5. Standardize `<title>` to `Todo App — LiveTemplate`
+6. Verify `lang="en"` is present
+
+### 2c. Layout improvements
+
+1. **Stats into hgroup subtitle**: Move stats from separate `{{ template "stats" }}` into the article header as part of `<hgroup>`:
+   ```html
+   <hgroup>
+     <h1>{{ .Title }}</h1>
+     <p>Total: <strong>{{ .TotalCount }}</strong> · Completed: <strong>{{ .CompletedCount }}</strong> · Remaining: <strong>{{ .RemainingCount }}</strong></p>
+   </hgroup>
+   ```
+
+2. **Combine search + sort into one row**:
+   ```html
+   <div class="grid">
+     {{ template "search-form" . }}
+     {{ template "sort-select" . }}
+   </div>
+   ```
+
+3. **Compact delete buttons**: `class="compact secondary outline"` on delete buttons in table
+4. **Compact pagination**: `class="compact"` on prev/next buttons
+5. **Compact clear completed**: `class="compact secondary outline"` instead of full-width
+6. **Inline forms in table cells**: `class="inline"` on forms inside `<td>`
+
+### 2d. Showcase features (Tier 2 lvt-* attributes)
+
+These demonstrate LiveTemplate's key capabilities with minimal code:
+
+1. **Form reset on success** — clears input after adding a todo:
+   ```html
+   <form method="POST" name="add" lvt-el:reset:on:add:success>
+   ```
+
+2. **Entry animations** — new todo rows fade in:
+   ```html
+   <tr data-key="{{ .ID }}" lvt-fx:animate="fade">
+   ```
+
+3. **Highlight on toggle** — visual flash when a todo's status changes:
+   ```html
+   <tr data-key="{{ .ID }}" lvt-fx:animate="fade" lvt-fx:highlight="flash">
+   ```
 
-Apply to ALL 10 templates:
+4. **Loading states on buttons** — aria-busy during server round-trip:
+   ```html
+   <button type="submit" name="add"
+     lvt-el:setAttr:on:add:pending="aria-busy:true"
+     lvt-el:setAttr:on:add:done="aria-busy:false"
+     {{.lvt.AriaDisabled "text"}}>Add</button>
+   ```
 
-1. **Add `lang="en"`** to `<html>` where missing (6 templates)
-2. **Add `<meta name="color-scheme" content="light dark">`** to all `<head>` blocks
-3. **Remove `data-theme="light"`** from todos template
-4. **Link shared CSS**: `<link rel="stylesheet" href="/livetemplate.css">` in all templates. In production use npmjs cdn css
-5. **Serve shared CSS**: Add `http.Handle("/livetemplate.css", ...)` in each example's main.go (or via the testing framework). In production use npmjs cdn css.
-6. **Standardize `<title>`**: Use `App Name — LiveTemplate` pattern
-7. **Use `<hgroup>`** for title + subtitle combinations consistently
+5. **Dark mode** — automatic via `<meta name="color-scheme" content="light dark">` + removing `data-theme="light"`. No code changes needed; Pico CSS handles the OS preference.
+
+### 2e. Revised todos.tmpl template sketch
+
+The final template should demonstrate these features in this Tier breakdown:
+
+**Tier 1 (standard HTML):**
+- `<form method="POST" name="add">` → Add() action
+- `<button name="confirmDelete">` → ConfirmDelete() action
+- `<button name="clearCompleted">` → ClearCompleted() action
+- `<button name="prevPage">` / `<button name="nextPage">` → pagination
+- `<input type="search" name="query">` → Change() for live search
+- `<select name="sort_by">` → Change() for live sort
+- `{{ .lvt.ErrorTag "text" }}`, `{{ .lvt.AriaInvalid "text" }}`, `{{ .lvt.AriaDisabled "text" }}` → validation
+- `{{ template "lvt:modal:confirm:v1" }}`, `{{ template "lvt:toast:container:v1" }}` → components
+- `{{ .lvt.DevMode }}` → conditional script/CSS loading
+
+**Tier 2 (lvt-* attributes, used sparingly):**
+- `lvt-on:change="toggle"` — checkbox toggle without inline JS (CSP fix)
+- `lvt-el:reset:on:add:success` — form auto-clear on success
+- `lvt-fx:animate="fade"` — entry animation on new rows
+- `lvt-fx:highlight="flash"` — visual feedback on toggled rows
+- `lvt-el:setAttr:on:add:pending="aria-busy:true"` — loading state on Add button
+- `lvt-el:setAttr:on:add:done="aria-busy:false"` — clear loading state
+
+This is 6 lvt attributes total, each solving a real interaction problem that standard HTML cannot express.
+
+### 2f. New in v0.8.19: `data-lvt-target` for cross-element targeting
+
+The client v0.8.19 adds `data-lvt-target` — `lvt-el:` methods can operate on a *different* element:
+- `data-lvt-target="#id"` → targets `document.getElementById(id)`
+- `data-lvt-target="closest:selector"` → targets `element.closest(selector)`
+
+**Potential use in todos**: A "focus search" keyboard shortcut could use this. However, since focusing an input isn't an `lvt-el:` method (it's `setAttr`, `addClass`, etc.), this is better left as a future enhancement unless a `focus` method is added to `lvt-el:`. For now, document `data-lvt-target` in the Tier 2 table as available.
+
+**Useful for other examples**: The login example could use `data-lvt-target` for modal/dialog interactions without server round-trips. These are optional enhancements beyond this plan's scope.
 
 ---
 
-## Phase 3: Per-Example Visual & Code Fixes
-
-### 3a. `counter/counter.tmpl` — Visual Overhaul
-**Current**: Counter value is plain `<p>Counter: X</p>`, 3 full-width buttons in grid.
-**Improved**:
-- Wrap in `<article>` with `<hgroup>` (title + "Real-time counter with WebSocket" subtitle)
-- Make counter value visually prominent: `<p><strong>Counter: <data>{{.Counter}}</data></strong></p>`
-- Use `<fieldset role="group">` for buttons instead of `<div class="grid">` — renders as a compact single-row toolbar
-- Add `lang="en"`, `color-scheme` meta
-
-### 3b. `todos/todos.tmpl` — Compact Controls, Tighter Layout
-**Current**: Add form → stats → search → sort dropdown → table → pagination → clear completed. Very vertical.
-**Improved**:
-- Remove `<style>` block, link shared CSS
-- Remove `data-theme="light"`
-- **Combine search + sort into one row**: Use `<div class="grid">` with search input + sort select side by side
-- **Stats as subtitle**: Move stats into `<hgroup>` as `<p>` subtitle, not a separate section
-- **Compact delete buttons**: Add `class="compact secondary"` to delete buttons in table
-- **Compact pagination**: Smaller previous/next buttons with `class="compact"`
-- **Clear completed**: Make it a `class="compact secondary outline"` button, not full-width
-
-### 3c. `chat/chat.tmpl` — Reduce CSS, Compact Input
-**Current**: ~50 lines custom CSS, full-width send button separate from input.
-**Improved**:
-- Replace `.stats` div → `<small>` element (Pico handles the styling)
-- Replace `.input-form` grid → `<fieldset role="group">` (compact input+button on one line)
-- Replace `.empty-state` → `<small>` 
-- Keep message container `.messages` CSS (genuine Tier 2 need for scrollable area with `lvt-fx:scroll`)
-- Keep `.message` styles but minimize — use Pico variables
-- Remove `body { padding: 1rem; }` — Pico's container handles this
-- Wrap in `<article>` for consistent card structure
-- Add `<hgroup>` with title + online status
-
-### 3d. `flash-messages/flash.tmpl` — Single Toolbar
-**Current**: "Clear All" and "Simulate Error" as two full-width buttons in a grid, full-width "Add Item" button.
-**Improved**:
-- **Combine add form**: Use `<fieldset role="group">` for input + "Add" button on one line
-- **Action toolbar**: Use `<nav>` or `<fieldset role="group">` for "Clear All" + "Simulate Error" as compact buttons in one row
-- **Compact remove buttons**: `class="compact secondary outline"` in item table
-- Add `<hgroup>` with title + subtitle
-- Add `lang="en"`, `color-scheme` meta
-- Move the info blockquote to a `<details>` accordion (saves vertical space — user can expand if curious)
-
-### 3e. `progressive-enhancement/progressive-enhancement.tmpl` — Table Layout, No Custom CSS
-**Current**: Custom `<style>` block with `.completed`, `.empty-state`, `.todo-item`, `.js-mode`. Each item is a flex row.
-**Improved**:
-- **Remove entire `<style>` block**
-- **Table layout**: Convert todo items to `<table>` rows: checkbox | title | date | delete
-- `.completed` class → `<s>` element (per CLAUDE.md)
-- `.empty-state` → `<p><small>...</small></p>`
-- **Compact toggle/delete buttons**: `class="compact secondary outline"` / `class="compact contrast outline"`
-- **Remove JS mode indicator** script — keep only `<noscript>` block
-- Use `<fieldset role="group">` for add form (input + button on one line)
+## Phase 3: Fix All Other Examples
+
+### Universal fixes (all 9 remaining templates)
+
+1. Add `lang="en"` to `<html>` where missing (counter, flash-messages, progressive-enhancement, ws-disabled, shared-notepad, live-preview)
+2. Add `<meta name="color-scheme" content="light dark">` to all `<head>` blocks
+3. Link shared CSS (`/livetemplate.css`) in all templates
+4. Standardize `<title>` to `Name — LiveTemplate` format
+5. Use `<hgroup>` for title + subtitle combinations
+6. Wrap content in `<article>` for consistent card structure where missing
+7. Serve `/livetemplate.css` in all `main.go` files
+
+### Per-example fixes
+
+**counter/counter.tmpl:**
+- Use `<fieldset role="group">` for buttons instead of `<div class="grid">`
+- Add `<hgroup>` with subtitle "Real-time counter with WebSocket"
+- Make counter value prominent: `<data>{{.Counter}}</data>`
+
+**chat/chat.tmpl:**
+- Remove entire `<style>` block (~50 lines) — all styles now in shared CSS
+- Replace `.input-form` grid → `<fieldset role="group">` for input+send
+- Replace `.stats` div → `<small>` element
+- Replace `.empty-state` div → `<p><small>...</small></p>`
+- Wrap in `<article>` with `<hgroup>` (title + online count)
+- Remove `body { padding: 1rem; }` — container handles this
+
+**flash-messages/flash.tmpl:**
+- Use `<fieldset role="group">` for input + Add button
+- Use `<nav>` or `<fieldset role="group">` for Clear All + Simulate Error (compact)
+- Add `class="compact secondary outline"` to remove buttons
+- Move info blockquote into `<details>` accordion
 - Add `<hgroup>` with title + subtitle
 
-### 3f. `ws-disabled/ws-disabled.tmpl` — Table Layout, No Inline Styles
-**Current**: 5 inline `style` attributes, flex layout for bookmarks.
-**Improved**:
-- **Replace ALL inline styles** with Pico semantic HTML
-- **Table layout**: Convert bookmarks to `<table>` rows: link + URL | delete
-- **Compact delete buttons**: `class="compact contrast outline"`
-- Empty state: `<p><small>No bookmarks yet. Add one above!</small></p>`
-- Use `<fieldset role="group">` for add form (label input + URL input on one row? or keep grid but tighter)
-- Add `<hgroup>` with title + subtitle
-- Add `lang="en"`, `color-scheme` meta
-
-### 3g. `shared-notepad/notepad.tmpl` — Remove Inline JS
-**Current**: `oninput="..."` for char count, footer inside `<form>`.
-**Improved**:
-- **Remove inline JS**: Add `Change()` method to Go controller for reactive char count
-- **Restructure**: Move save button into a `<fieldset role="group">` below textarea (button right-aligned, compact)
-- Char count as `<small>` below textarea, updated server-side
-- Add `lang="en"`, `color-scheme` meta
-
-### 3h. `avatar-upload/avatar-upload.tmpl` — Remove Custom JS, Clean Layout
-**Current**: Custom JS event listeners, outdated footer.
-**Improved**:
-- **Remove custom JavaScript** event listeners (framework handles upload events natively)
-- **Fix footer**: Remove outdated "LiveTemplate v0.3.0" reference
-- **Compact save button**: Profile forms don't need a full-width save button — use `class="compact"` or keep full-width (it's the primary action, so full-width is OK)
-- Avatar display: Keep as-is (simple img/mark pattern works)
-- Add `color-scheme` meta
-
-### 3i. `live-preview/preview.tmpl` — Minor Polish
-**Current**: Clean and simple. Missing `lang="en"`.
-**Improved**:
-- Add `lang="en"`, `color-scheme` meta
+**progressive-enhancement/progressive-enhancement.tmpl:**
+- **Remove entire `<style>` block** (`.js-mode`, `.completed`, `.empty-state`, `.todo-item` classes)
+- **Remove inline `<script>` block** (lines 94-97) — CSP violation
+- Remove JS mode indicator markup entirely; keep only `<noscript>` block
+- Convert todo items to `<table>` layout (rows: checkbox | title | date | delete)
+- Replace `.completed` class → `<s>` element for completed items
+- Replace `.empty-state` → `<p><small>...</small></p>`
+- Use `<fieldset role="group">` for add form
+- Add `class="compact"` to toggle/delete buttons
+
+**ws-disabled/ws-disabled.tmpl:**
+- **Remove all 5 inline `style` attributes** (CSP violation)
+- Convert bookmarks to `<table>` layout (rows: link+URL | delete)
+- Use `class="compact contrast outline"` on delete buttons
+- Use `class="inline"` on delete forms
+- Empty state: `<p><small>No bookmarks yet.</small></p>`
+
+**shared-notepad/notepad.tmpl:**
+- **Remove `oninput="..."`** inline JS handler — CSP violation
+- Add `Change()` method to Go controller for reactive char count (server-side)
+- The existing `lvt-form:preserve` stays (Tier 2, genuinely needed)
+- Add `lang="en"`, color-scheme meta
+
+**avatar-upload/avatar-upload.tmpl:**
+- **Fix outdated footer**: Remove "LiveTemplate v0.3.0" reference
+- Add color-scheme meta
+
+**live-preview/preview.tmpl:**
+- Add `lang="en"`, color-scheme meta
 - Add `<hgroup>` with subtitle "Type to see a live preview"
-- Link shared CSS
 
-### 3j. `login/templates/auth.html` — Minor Polish
-**Current**: Already well-structured with proper form patterns.
-**Improved**:
-- Add `color-scheme` meta
-- Link shared CSS (for narrow container benefit)
-- Compact logout button: `class="compact contrast"` (it's a secondary action)
+**login/templates/auth.html:**
+- Add color-scheme meta
+- Make logout button `class="compact contrast"` (secondary action)
 
 ---
 
 ## Phase 4: Go Controller Changes
 
-### 4a. `shared-notepad/main.go`
-- Add `Change()` method to handle real-time textarea input
-- Calculate char count server-side: `state.CharCount = len([]rune(state.Content))`
-- The Change() method enables auto-wired input bindings — textarea changes trigger server-side char count update
+### 4a. shared-notepad controller
+
+Add `Change()` method to replace inline JS char count:
+```go
+func (c *NotepadController) Change(state NotepadState, ctx *livetemplate.Context) (NotepadState, error) {
+    if ctx.Has("content") {
+        state.Content = ctx.GetString("content")
+        state.CharCount = len([]rune(state.Content))
+    }
+    return state, nil
+}
+```
+
+### 4b. todos controller
 
-### 4b. All examples — serve shared CSS
-- Each example's main.go serves `/livetemplate.css` at runtime via `http.ServeFile` pointing to `../client/livetemplate.css`
-- Templates link it with `<link rel="stylesheet" href="/livetemplate.css">`
-- For production/CDN, the CSS would be published alongside the client JS package. In production use npmjs cdn css.
+Update `Toggle()` to work with `lvt-on:change` data attributes:
+- The `data-id` attribute gets collected by the event delegator as `id` in the action data
+- `ctx.GetString("id")` continues to work
+- Remove the `ToggleInput` struct usage if form data shape changes
+- The checkbox's `checked` state is NOT sent — Toggle() flips the DB value, same as before
+
+### 4c. All examples — serve CSS
+
+Each `main.go` gets:
+```go
+http.HandleFunc("/livetemplate.css", e2etest.ServeCSS) // or ServeFile
+```
+
+If `e2etest.ServeCSS` doesn't exist, add it to the testing package alongside `ServeClientLibrary`, pointing to the client package's `livetemplate.css`.
 
 ---
 
-## Phase 5: Update CLAUDE.md Guidelines
+## Phase 5: Update CLAUDE.md
 
-Add new sections:
+### Add: CSP Compliance (new section, critical constraint)
 
-### Shared CSS
 ```
-- ALL examples link `livetemplate.css` for shared utilities
+## CSP Compliance
+
+All templates must be compatible with `Content-Security-Policy: script-src 'self'`:
+
+- NEVER use inline event handlers (`onchange`, `oninput`, `onclick`, etc.)
+- NEVER use `<style>` blocks in templates — all CSS in `livetemplate.css`
+- NEVER use inline `<script>` blocks (except the conditional client library loader)
+- NEVER use inline `style` attributes (except `<ins>`/`<del>` block pattern)
+- Use `lvt-on:{event}` attributes instead of inline JS event handlers
+- Use `Change()` method for reactive input handling
+```
+
+### Add: Shared CSS section
+
+```
+## Shared CSS
+
+All examples link `livetemplate.css` for shared utilities:
 - Served at `/livetemplate.css` (dev) or CDN (production)
-- Contains: narrow container, .compact buttons, .visually-hidden, .inline forms
+- Contains: narrow container (640px), `.compact` buttons, `.visually-hidden`,
+  `.inline` forms, `.messages`/`.message` for chat-style UIs
+- Do NOT add example-specific CSS to livetemplate.css — only reusable patterns
 ```
 
-### HTML Boilerplate Standard
-```html
+### Add: HTML Boilerplate Standard
+
+```
+## HTML Boilerplate
+
+Every template must use this boilerplate:
+
 <!DOCTYPE html>
 <html lang="en">
 <head>
@@ -222,58 +428,164 @@ Add new sections:
     <meta name="color-scheme" content="light dark">
     <title>App Name — LiveTemplate</title>
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css">
-    <link rel="stylesheet" href="/livetemplate.css"> #In production use npmjs cdn css using devmode
+    {{ if .lvt.DevMode }}
+    <link rel="stylesheet" href="/livetemplate.css">
+    {{ else }}
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@livetemplate/client@latest/livetemplate.css">
+    {{ end }}
 </head>
 ```
 
-### Visual Layout Standard
-- Wrap content in `<main class="container">` (narrow 640px via shared CSS)
-- Use `<article>` as the primary card container
-- Use `<hgroup>` for title + subtitle: `<hgroup><h1>Title</h1><p>Subtitle</p></hgroup>`
-- Group related controls in single-row toolbars: `<fieldset role="group">` or `<nav>`
+### Add: Visual Layout Standard
+
+```
+## Visual Layout
+
+- Wrap content in `<main class="container">` (640px via shared CSS)
+- Use `<article>` as primary card container
+- Use `<hgroup>` for title + subtitle
+- Group related controls: `<fieldset role="group">` or `<div class="grid">`
+- Inline forms in tables: `class="inline"`
+- Compact action buttons: `class="compact secondary"` or `class="compact contrast outline"`
+- Empty states: `<p><small>Message</small></p>`
+- Completed items: `<s>` element (not CSS classes)
+```
+
+### Update: Tier 2 Constructs table
+
+Add to existing table:
+```
+| `lvt-on:change` | Checkbox/input change without inline JS | Todo toggle |
+| `lvt-el:reset:on:{action}:success` | Form auto-clear on success | Add form |
+| `lvt-el:setAttr:on:{action}:pending` | Loading state during round-trip | Submit button |
+| `data-lvt-target` | Cross-element targeting for lvt-el: methods | Modal open/close, dropdown toggle |
+```
+
+---
+
+## Phase 6: README Showcase
+
+Add a showcase section at the top of `README.md`, before the Progressive Complexity table:
+
+```markdown
+## Showcase: Todo App
+
+![Todo App Demo](docs/assets/todos-demo.gif)
+
+The todo app demonstrates LiveTemplate's core features in ~150 lines of Go + ~80 lines of HTML:
+
+- **Real-time sync** — open two tabs as the same user; changes appear instantly via `Sync()`
+- **Standard HTML forms** — `<form method="POST" name="add">` routes to `Add()` with zero configuration
+- **Live search & sort** — `Change()` auto-wires input events with 300ms debounce
+- **Validation** — `ErrorTag`, `AriaInvalid`, `AriaDisabled` template helpers
+- **Components** — modal confirmation dialogs and toast notifications
+- **Entry animations** — `lvt-fx:animate="fade"` on new rows
+- **Loading states** — `lvt-el:setAttr:on:pending="aria-busy:true"` for visual feedback
+- **Dark mode** — automatic via `<meta name="color-scheme" content="light dark">`
+- **Progressive enhancement** — works without JavaScript via HTTP POST fallback
+
+**Left tab**: Add, search, sort, and paginate todos
+**Right tab**: Same user — watch changes sync in real-time
+```
+
+### Two-tab demo GIF
+
+Record with screen capture (Kap, ffmpeg, or similar):
+1. Split screen: two browser windows side by side, both at `localhost:8080`
+2. Both logged in as `alice`
+3. Demo sequence:
+   - Tab A: Add "Buy groceries" → appears in Tab B via Sync(), fade animation
+   - Tab B: Toggle complete → strikethrough appears in Tab A, highlight flash
+   - Tab A: Search "buy" → filters in Tab A only (independent per-tab)
+   - Tab B: Delete with modal confirmation → disappears from Tab A
+   - Show toast notifications appearing in both tabs
+   - Toggle dark mode (OS preference or browser devtools)
+
+Save GIF to `docs/assets/todos-demo.gif`.
+
+---
+
+## Phase 7: Tests
+
+### Test adjustments expected
+
+**todos/todos_test.go** (1213 lines):
+- Checkbox toggle: selectors change from `form[name=toggle] input[type=checkbox]` to `input[type=checkbox][lvt-on\\:change]` or similar
+- If stats move into hgroup, update text matching
+- If delete buttons get `class="compact"`, selectors still work (name-based)
+- Pagination button selectors still work (name-based: `button[name=prevPage]`)
+- Form reset behavior: verify input clears after add
+
+**Other tests**: Selector changes for restructured HTML (div → table, class removal, etc.)
+
+### Verification
+
+```bash
+# Run full test suite
+./test-all.sh
+
+# Individual example testing during development
+cd todos && go test -v -run TestTodosE2E
+cd chat && go test -v -run TestChatE2E
+# ... etc for each modified example
+```
+
+---
+
+## Phase 8: Cleanup
 
-### Button Sizing
-- Primary actions: full-width or auto-width Pico buttons
-- Inline/table actions (delete, toggle, remove): `class="compact"` + `secondary outline` or `contrast outline`
-- Forms inside tables/toolbars: `class="inline"` to remove margin
+- Remove stale binary directories: `todos-components/`, `todos-progressive/`, `profile-progressive/`
+- Verify `.gitignore` excludes binary artifacts
 
-### Form Pattern Standard
-- Use `<fieldset role="group">` for inline input+button groups (e.g., add forms, search bars)
-- Place `{{.lvt.ErrorTag}}` immediately after the input it validates
-- Consistent empty states: `<p><small>Message here</small></p>`
+---
+
+## New Constraints for Future Examples (CLAUDE.md additions summary)
 
-### List/Item Display Standard
-- Use `<table>` for item lists with actions (consistent column layout)
-- Use `<s>` for completed/struck-through items
-- Use `hidden` attribute for conditional visibility
+1. **CSP compliance is mandatory** — no inline JS, no inline styles, no `<style>` blocks
+2. **All CSS goes in shared `livetemplate.css`** — if a new pattern is needed, add it there; never in templates
+3. **Dark mode by default** — always include `<meta name="color-scheme" content="light dark">`
+4. **Use `lvt-on:change` for immediate input responses** instead of inline `onchange`/`oninput`
+5. **Use `Change()` for debounced input responses** instead of inline JS
+6. **Use `lvt-el:` for client-side reactions** (form reset, loading states) instead of custom JS
+7. **Use `lvt-fx:` for visual polish** (animations, highlights) instead of CSS animations
+8. **Standard HTML boilerplate** — lang, color-scheme, title format, shared CSS link are all mandatory
 
 ---
 
-## Phase 6: Verify Tests
+## New lvt Attribute Suggestions
 
-Run `./test-all.sh` to ensure all examples still pass. Test adjustments likely needed for:
-- Element selectors changed (e.g., `div.todo-item` → `tr`, `div.grid button` → `fieldset[role=group] button`)
-- Text content changes (e.g., titles with " — LiveTemplate" suffix)
-- New DOM structure affecting chromedp queries
-- Removed JS mode indicator in progressive-enhancement
+No new attributes are needed for the current plan. All CSP violations are solvable with existing attributes:
+
+| CSP Violation | Solution | Existing Attribute |
+|---|---|---|
+| `onchange="this.form.requestSubmit()"` | `lvt-on:change="toggle"` + `data-id` | `lvt-on:{event}` (v0.8.13+, data-* collection v0.8.19) |
+| `oninput="..."` for char count | `Change()` method (server-side) | Auto-wired by framework |
+| Inline `<script>` for mode indicator | Remove indicator; keep `<noscript>` | N/A — just remove the JS |
+
+**Future consideration**: If more examples need "auto-submit on input change" (form-level, not action-level), consider `lvt-form:auto-submit` as a convenience attribute. But for now, `lvt-on:change` covers the use case.
 
 ---
 
-## Todos Summary
+## New Semantic CSS Suggestions for livetemplate.css
+
+Beyond what's in Phase 1, consider these for future additions (not in this plan's scope):
 
-| ID | Title | Dependencies |
+| Pattern | CSS | Use Case |
 |---|---|---|
-| `shared-css` | Create livetemplate.css with visual utilities | — |
-| `serve-css` | Add CSS serving to all examples' main.go | `shared-css` |
-| `fix-counter` | Counter: fieldset button group, hgroup, HTML fixes | `serve-css` |
-| `fix-todos` | Todos: compact controls, combined search+sort, remove custom CSS | `serve-css` |
-| `fix-chat` | Chat: reduce CSS, fieldset input, article wrapper | `serve-css` |
-| `fix-flash` | Flash: single toolbar, compact buttons, details accordion | `serve-css` |
-| `fix-progressive` | Progressive: table layout, remove all custom CSS/JS | `serve-css` |
-| `fix-ws-disabled` | WS-disabled: table layout, remove all inline styles | `serve-css` |
-| `fix-notepad` | Notepad: remove inline JS, add Change() method | `serve-css` |
-| `fix-avatar` | Avatar: remove custom JS, fix footer | `serve-css` |
-| `fix-live-preview` | Live-preview: hgroup, HTML fixes | `serve-css` |
-| `fix-login` | Login: compact logout, color-scheme | `serve-css` |
-| `update-claude-md` | Add visual + coding guidelines to CLAUDE.md | all fixes |
-| `verify-tests` | Run test-all.sh and fix any test breakage | all fixes |
+| `.truncate` | `overflow: hidden; text-overflow: ellipsis; white-space: nowrap;` | Long text in table cells |
+| `.fade-in` | `animation: lvt-fade-in var(--lvt-animate-duration, 300ms)` | Manual fade-in without `lvt-fx:animate` |
+| `.message-header` | `font-size: 0.85rem; margin-bottom: 0.25rem; opacity: 0.8;` | Chat message headers |
+| `.message-time` | `float: right;` | Timestamp alignment in messages |
+
+These can be added later as needed. The Phase 1 CSS covers all immediate needs.
+
+---
+
+## Implementation Order (recommended)
+
+1. **Start in client repo**: extend CSS, update package.json
+2. **Todos example**: template + controller + main.go + tests — get the showcase working first
+3. **Other examples**: apply universal fixes, then per-example fixes, test each
+4. **CLAUDE.md + README**: update docs
+5. **Demo GIF**: record after everything passes
+6. **Cleanup**: remove stale binaries