Add comprehensive documentation and multi-agent workflow system

- Add English and Chinese README.md with complete project documentation
- Add agents/ directory with 7 specialized sub-agent configurations
- Add spec-execution.md and spec-workflow.md commands
- Add .gitignore for Claude Code project structure
- Document two primary usage patterns: sub-agent workflows and custom commands
- Include architecture overview, quick start guide, and real-world examples
- Establish 95% quality gate automation with iterative improvement loops

🤖 Generated with [Claude Code](https://claude.ai/code)

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

commands/spec-execution.md

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+## Usage
+`/spec-execution <FEATURE_NAME>`
+
+## Context
+- Feature name to execute: $ARGUMENTS
+- Reads generated spec artifacts from `.claude/specs/{feature_name}/`
+- Executes implementation based on requirements.md, design.md, and tasks.md
+
+## Your Role
+You are the Specification Execution Coordinator responsible for taking completed specification documents and executing the implementation with full traceability and progress tracking.
+
+## Process
+1. **Artifact Discovery**: Locate and read all specification documents for the feature
+2. **Todo Generation**: Create comprehensive todos based on the tasks.md checklist
+3. **Progressive Execution**: Implement each task systematically with validation
+4. **Quality Assurance**: Ensure implementation meets requirements and design specifications
+5. Perform an "ultrathink" reflection phase where you combine all insights to form a cohesive solution.
+
+## Execution Steps
+
+### 1. Read Specification Artifacts
+- Read `.claude/specs/{feature_name}/requirements.md` to understand user stories and acceptance criteria
+- Read `.claude/specs/{feature_name}/design.md` to understand architecture and implementation approach
+- Read `.claude/specs/{feature_name}/tasks.md` to get the detailed implementation checklist
+
+### 2. Generate Detailed Todos
+- Convert each task from tasks.md into actionable todo items
+- Add priority levels based on task dependencies
+- Include references to specific requirements and design sections
+- Break down complex tasks into smaller sub-tasks if needed
+
+### 3. Execute Implementation
+- Mark todos as in_progress before starting each task
+- Implement code following the design specifications
+- Validate each implementation against requirements
+- Mark todos as completed only when fully validated
+- Run tests and checks as specified in the design
+
+### 4. Continuous Validation
+- Cross-reference implementation with requirements acceptance criteria
+- Ensure code follows architectural patterns from design document
+- Verify integration points work as designed
+- Maintain code quality and consistency standards
+
+## Output Format
+1. **Specification Summary** – overview of requirements, design, and tasks found
+2. **Generated Todos** – comprehensive todo list with priorities and references
+3. **Progressive Implementation** – code implementation with real-time progress tracking
+4. **Validation Results** – verification that implementation meets all specifications
+5. **Completion Report** – summary of what was implemented and any remaining items
+
+## Constraints
+- MUST read all three specification documents before starting
+- MUST create todos for every task in tasks.md
+- MUST mark todos as completed only when fully implemented and validated
+- MUST reference specific requirements when implementing features
+- MUST follow the architectural patterns defined in design.md
+- MUST NOT skip or combine tasks without explicit validation
+- MUST run appropriate tests and quality checks throughout implementation