--- name: apply-theme-3d7fe97afac1 description: Use when applying a brand theme configuration to the app. Reads theme_config.json and updates Dart theme files with new colors, gradients, logos, and animation effects. --- # Apply Theme Skill Reads `assets/config/theme_config.json` generated by `/brand-theme` and applies it to the Flutter app's theme system. ## When to Use - After running `/brand-theme` to generate a config - User asks to "apply the theme", "update theme from config", or "implement the brand colors" - User invokes `/apply-theme` directly ## Prerequisites - `assets/config/theme_config.json` must exist (generated by `/brand-theme`) - If it doesn't exist, instruct user to run `/brand-theme` first ## Process Overview 1. Read and validate `theme_config.json` 2. Update color definitions in `lib/core/theme/app_colors.dart` 3. Update gradients in `lib/core/theme/gradients.dart` 4. Update logo paths 5. Update app name, caption, and welcome message in `lib/core/constants/app_constants.dart` 6. Implement animation effects based on style preset 7. Verify the app builds successfully ## Step 1: Read Configuration Read `assets/config/theme_config.json` and validate structure: ```json { "brand": { "name": "...", "appName": { "light": "...", "dark": "..." }, "caption": { "light": "...", "dark": "..." }, "welcomeMessage": "...", "logo": { "light": "...", "dark": "..." } }, "colors": { "primary": "#...", "secondary": "#...", "accent": "#..." }, "animation": { "style": "neon|cosmic|minimal|professional|playful" }, "modes": { "default": "dark|light|system" } } ``` **Validation checks:** - Primary color is valid hex - Logo paths are provided - Animation style is one of the valid presets - App name and caption are provided (or default to brand.name) ## Step 2: Update app_colors.dart File: `lib/core/theme/app_colors.dart` ### Color Mapping Map config colors to the app's color system. Generate both light and dark variants. **From config primary color, derive:** For **dark mode** (if primary is the accent color): - `_darkPrimary` = config primary - `_darkPrimaryForeground` = contrasting color (white or dark based on luminance) - `_darkSecondary` = config secondary (or derive complementary) - `_darkAccent` = config accent (or derive triadic) - `_darkBackground` = deep dark version of primary (10% lightness) - `_darkCard` = slightly lighter than background (15% lightness) - `_darkMuted` = desaturated primary at 20% lightness - `_darkMessageBubbleOwn` = primary at 30% lightness For **light mode**: - `_lightPrimary` = config primary - `_lightPrimaryForeground` = white (or dark if primary is light) - `_lightBackground` = white or very light tint of primary - `_lightCard` = off-white or very light gray - `_lightMessageBubbleOwn` = config primary ### Logo Paths Update lines 97-98 in app_colors.dart: ```dart static const String lightLogo = '[CONFIG_LIGHT_LOGO]'; static const String darkLogo = '[CONFIG_DARK_LOGO]'; ``` **Logo Sizing Note:** - The welcome screen (`lib/features/chat/presentation/widgets/welcome_hero_screen.dart`) displays the logo at `height: 120` - **Prefer emblem/icon-only logos** - full logos with text appear oversized at this height - If logo appears too large, verify an emblem-only asset is being used ### Color Generation Algorithm ``` Given primary hex color: 1. Convert to HSL 2. For dark mode derived colors: - Background: H same, S * 0.3, L = 5% - Card: H same, S * 0.3, L = 8% - Muted: H same, S * 0.2, L = 15% - Border: H same, S * 0.2, L = 12% 3. For light mode derived colors: - Background: white (#FFFFFF) - Card: H same, S * 0.05, L = 98% - Muted: H same, S * 0.1, L = 96% 4. For foreground/text colors: - If primary luminance > 0.5: use dark text - If primary luminance <= 0.5: use light text ``` ## Step 3: Update gradients.dart File: `lib/core/theme/gradients.dart` Generate gradient variations from the config colors: ```dart // Primary gradient - 3 stops from lighter to darker static const darkPrimaryGradient = LinearGradient( colors: [ Color(0xFF[LIGHTER_PRIMARY]), // +10% lightness Color(0xFF[PRIMARY]), // config primary Color(0xFF[DARKER_PRIMARY]), // -10% lightness ], stops: [0.0, 0.5, 1.0], ); ``` Apply same pattern to: - `darkPrimaryGradient` / `lightPrimaryGradient` - `darkSecondaryGradient` / `lightSecondaryGradient` - `darkAccentGradient` - `primaryButtonGradient` - `secondaryButtonGradient` ## Step 4: Update App Constants File: `lib/core/constants/app_constants.dart` Update the app name, caption, and related strings from the config: ```dart // App Information static const String appName = '[CONFIG_APPNAME_LIGHT]'; // Light theme name static const String appNameDark = "[CONFIG_APPNAME_DARK]"; // Dark theme name static const String appCaption = '[CONFIG_CAPTION_LIGHT]'; // Light theme caption static const String appCaptionDark = '[CONFIG_CAPTION_DARK]'; // Dark theme caption ``` **Mapping from config:** - `appName` = `brand.appName.light` (or `brand.name` if not specified) - `appNameDark` = `brand.appName.dark` (or `brand.name` if not specified) - `appCaption` = `brand.caption.light` (or "Powered by AI" if not specified) - `appCaptionDark` = `brand.caption.dark` (or same as light if not specified) **Note:** The welcome message (`brand.welcomeMessage`) is used in `chat_home_page.dart` via the app name constants. Updating `appName` and `appNameDark` will automatically update the welcome message format: "Welcome to {appName}!" ## Step 5: Implement Animation Effects Based on `animation.style` from config, create or update animation widgets. ### CRITICAL: Follow Existing Codebase Patterns All effects MUST follow these patterns from the existing codebase: #### Pattern 1: Theme Brightness Detection ```dart final isDark = Theme.of(context).brightness == Brightness.dark; ``` #### Pattern 2: AppColors Extension Access ```dart final appColors = Theme.of(context).extension()!; final colorScheme = Theme.of(context).colorScheme; ``` #### Pattern 3: Dynamic Color Selection (from speech_to_text_widget.dart) ```dart List _buildGlowColors() { final isDark = Theme.of(context).brightness == Brightness.dark; final appColors = context.appColors; if (isDark) { return isActive ? [ colorScheme.primary.withOpacity(0.8), colorScheme.secondary.withOpacity(0.6), appColors.accent.withOpacity(0.4), ] : [ appColors.mutedForeground.withOpacity(0.3), appColors.mutedForeground.withOpacity(0.2), ]; } // Light theme with reduced intensity... } ``` #### Pattern 4: Use AppConstants for Animation Values Reference: `lib/core/constants/app_constants.dart` ```dart static const Duration glowAnimationDuration = Duration(milliseconds: 2000); static const double glowBorderSize = 2.0; static const double speechGlowSizeListening = 12.0; static const double speechGlowSizeIdle = 6.0; ``` #### Pattern 5: Existing Packages to Use - **glowy_borders** - `AnimatedGradientBorder` for neon glow effects - **flutter_animate** - `.animate().fadeIn().scale().shimmer()` chains - **CustomPainter** - For particle/starfield effects (see `particles_widget.dart`) - **AnimationController + AnimatedBuilder** - For wave/pulse effects #### Pattern 6: Particles Widget Reference See `lib/shared/widgets/particles_widget.dart` for starfield implementation: ```dart ParticlesWidget( quantity: 50, color: appColors.primary, // Theme-aware staticity: 50, size: 0.4, ) ``` ### Effect Implementation Patterns Reference: https://github.com/flutterfx/flutterfx_widgets #### cosmic style Create `lib/shared/widgets/effects/cosmic_background.dart`: - Animated starfield using CustomPainter - Subtle parallax on mouse/touch movement - Use `flutter_animate` for particle fade effects #### neon style Create `lib/shared/widgets/effects/border_beams.dart`: - Animated gradient border using `glowy_borders` package - Pulsing glow effect synced with primary color - Use config primary color for the beam color #### minimal style - No new widgets needed - Ensure existing `BlurFade` transitions are subtle (duration: 200ms, blur: 2.0) #### professional style Create `lib/shared/widgets/effects/fancy_card.dart`: - Elevated card with subtle shadow animation - Hover state with slight scale and shadow increase - Clean, understated motion #### playful style Create `lib/shared/widgets/effects/particle_burst.dart`: - Confetti/particle effect on interactions - Use chart colors from config for particle variety - Bouncy spring animations ### Effect File Structure ``` lib/shared/widgets/effects/ ├── cosmic_background.dart # For cosmic style ├── border_beams.dart # For neon style ├── fancy_card.dart # For professional style ├── particle_burst.dart # For playful style └── effects_provider.dart # Exports based on active style ``` ### effects_provider.dart Template ```dart import 'package:flutter/material.dart'; enum AnimationStyle { cosmic, neon, minimal, professional, playful } // Current active style from config const AnimationStyle activeStyle = AnimationStyle.[CONFIG_STYLE]; class EffectsProvider { static Widget wrapWithBackground(Widget child) { switch (activeStyle) { case AnimationStyle.cosmic: return CosmicBackground(child: child); case AnimationStyle.neon: return BorderBeamsBackground(child: child); case AnimationStyle.professional: return FancyCardBackground(child: child); case AnimationStyle.playful: return FlickeringGridBackground(child: child); case AnimationStyle.minimal: default: return child; } } static Widget wrapWithLoadingEffect(Widget child) { // Similar switch for loading indicators } } ``` ## Step 6: Verify Build After making all changes: 1. Run `flutter analyze` to check for errors 2. Run `flutter build web --wasm` to verify build succeeds 3. Report any issues found **IMPORTANT:** If testing via the backend server (http://localhost:8000): - The server serves static files from `build/web` - After rebuilding, **restart the server** to serve the new build - Kill existing server: `lsof -ti :8000 | xargs kill -9` - Start fresh: `cd backend && uv run python app.py` ## Output Summary After applying theme, display: ``` Theme applied successfully! Updated files: - lib/core/theme/app_colors.dart (colors + logos) - lib/core/theme/gradients.dart (gradient variations) - lib/core/constants/app_constants.dart (app name + caption) - lib/shared/widgets/effects/ (animation widgets) Brand applied: - App Name: [NAME] - Caption: [CAPTION] - Welcome: [WELCOME_MESSAGE] Colors applied: - Primary: [HEX] - Secondary: [HEX] - Accent: [HEX] Animation style: [STYLE] Next steps: - Run `flutter build web --wasm` to rebuild - Restart the backend server to serve the new build - Test the app at http://localhost:8000 ``` ## Rollback If issues occur, the skill should: 1. Keep original files backed up (git handles this) 2. Provide instructions to revert: `git checkout -- lib/core/theme/` ## File Modification Checklist Before completing, verify these files were updated: - [ ] `lib/core/theme/app_colors.dart` - Color constants and logo paths - [ ] `lib/core/theme/gradients.dart` - Gradient definitions - [ ] `lib/core/constants/app_constants.dart` - App name, caption, welcome message - [ ] `lib/shared/widgets/effects/` - Animation effect widgets (if style != minimal) - [ ] Verify `flutter analyze` passes - [ ] Commit changes with descriptive message ## Error Handling **Config file not found:** ``` theme_config.json not found at assets/config/theme_config.json Run /brand-theme first to generate the configuration. ``` **Invalid color format:** ``` Invalid color "[value]" in config. Expected hex format like #FF5F46. Please fix the config file or run /brand-theme again. ``` **Build fails after changes:** ``` Build failed after applying theme. Errors: [error details] You can revert changes with: git checkout -- lib/core/theme/ Then review the config and try again. ``` --- Source attribution: David-Li0406 Original project: https://github.com/David-Li0406/meta-skill-evloving/blob/ca3a335628981df10c36e00cb9850df2c247ab9a/skill-flow/data/skills-refined-36k/skillsmp/apply-theme/SKILL.md License: Apache-2.0 License information: https://www.apache.org/licenses/LICENSE-2.0 Original upstream instructions; downloaded from Mega AI Hub. ## Upstream license notice Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. 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See the License for the specific language governing permissions and limitations under the License. # Mega AI Hub resource metadata Creator / publisher: David-Li0406 Original project: https://github.com/David-Li0406/meta-skill-evloving/blob/ca3a335628981df10c36e00cb9850df2c247ab9a/skill-flow/data/skills-refined-36k/skillsmp/apply-theme/SKILL.md Attribution basis: Source repository record Fields of work: Design, Development & Engineering Roles: Frontend Developer, Product Designer, UX Designer Specialties: Frontend, Mobile Tools: Dart Country applicability: Country not specified Classification basis: Source catalog labels Instruction SHA-256: 5289ab2253351dd1eead8a4f8831ba6f16201487cc22cfae30115e39790454fb