v2.4.0

Added

• Debug workflow: added fec-debug slash command with type-based routing, fec-debugger agent for complex diagnostic scenarios, and fec-debug-framework skill with a 5-step diagnostic methodology.
• 6 new skills: fec-performance-optimization (Core Web Vitals, memory leaks, performance budgets), fec-source-driven-development (evidence-based decisions with official-docs verification), fec-state-management (state architecture patterns), fec-typescript-type-safety (type safety enforcement), fec-dependency-upgrade (upgrade planning), fec-responsive-layout (responsive layout strategy), and fec-tailwind-design-system (Tailwind-based design system implementation).
• 2 new integration skills: fec-api-integration and fec-motion-interaction.
• Example prompts library: added docs/example-prompts.md and docs/zh-CN/example-prompts.md with scenario-based prompt catalogs covering skills, agents, commands, design workflows, testing, maintenance, and runtime setup; linked from all README variants.
• UI design system generator: added design-system.mjs generator with product rules, style archetypes, UX quality and Stack UI rules data packages; supports --persist and --page flags to write MASTER.md and page overrides.

Changed

• Agent renaming: renamed 8 agents from fec-frontend-* to shorter fec-* prefix; replaced fec-frontend-code-review skill with fec-code-review.
• Skill consolidation: merged fec-interface-polish and fec-ui-design-direction into a unified fec-ui-design skill covering both product-level visual direction and detail-level polish.
• UI design enhancement: enhanced fec-ui-design with design-system generation, Master/Page overrides, chart UX, color rhythm, visual texture, anti-generic polish, and visual identity checks.
• Skill taxonomy: refined from 4 to 7 categories — implementation-capability, testing, review-quality, design-ui, legacy-migration, maintenance-docs; updated README tables across all 5 locales.
• Unified planning entry: merged /fec-test-plan into /fec-plan, which now auto-routes to implementation or test strategy based on user intent; updated all README variants, openclaw docs, example prompts, project structure, and marketplace metadata (9 → 8 commands).
• Rules naming: renamed all template shared rules with fec- prefix for consistent naming convention; updated README, CHANGELOG, agents, commands, skills, installers, and tests.
• Skill descriptions: refined skill descriptions, prompt examples, and README formatting; clarified fec-storybook-component-doc scope to component documentation, design-system presentation, and isolated state previews.

Fixed

• Skill relations: decoupled skill relations from agent navigation to prevent incorrect cross-references.

Removed

• /fec-build-fix slash command and fec-build-fixer agent — superseded by the new debug workflow.
• /fec-test-plan slash command — test-planning intent is now handled by /fec-plan.
• fec-interface-polish and fec-ui-design-direction skills — merged into fec-ui-design.