feat: Add comprehensive security coding expert agents with improved descriptions

[ChanMeng666]

This PR adds three new security-focused coding expert agents with shortened descriptions and improved clarity:

New Agents Added

• backend-security-coder.md: Specialized in backend security coding practices
• frontend-security-coder.md: Focused on frontend security implementations
• mobile-security-coder.md: Dedicated to mobile app security coding

Key Improvements

• Shortened descriptions to 2-3 lines to match repository standards
• All agents use \model: opus\ for security-critical tasks
• Clear differentiation from existing \security-auditor.md:
• These agents focus on hands-on coding and implementation
• \security-auditor\ focuses on high-level auditing and assessment
• Complete mobile agent file with all sections properly formatted
• Comprehensive coverage of platform-specific security patterns

Use Cases

• Backend Security Coder: API security, database protection, authentication systems
• Frontend Security Coder: XSS prevention, CSP implementation, DOM security
• Mobile Security Coder: WebView security, biometric auth, cross-platform security

These agents enhance the existing security capabilities and provide specialized expertise for different development domains while maintaining clear boundaries with existing security tools.

[Bortus-AI]

Nice. Trying these out now

[wshobson]

Request Changes - PR #62 Review

Thank you for contributing these security-focused agents. While they provide valuable coverage, several issues need addressing:

Critical Issues

1. Incomplete file: mobile-security-coder.md is truncated at line 153, missing Response Approach and Example Interactions sections
2. Model inconsistency: Consider using model: opus instead of sonnet for security-critical agents (matching security-auditor.md)

Required Improvements

• Shorten descriptions to 2-3 lines to match repository standards
• Address overlap with existing security-auditor.md - please add clear differentiation or consolidate
• Add use-case boundaries: Specify when to use these agents vs existing security-auditor

Minor Fixes

• Remove repetitive phrasing in behavioral traits (backend-security-coder.md:89-90)
• Complete the mobile agent's cross-platform examples

Please fix the truncated file and address the model/overlap concerns. The agents show promise but need these refinements before merging.

[ChanMeng666]

Request Changes - PR #62 Review

Thank you for contributing these security-focused agents. While they provide valuable coverage, several issues need addressing:

Critical Issues

1. Incomplete file: mobile-security-coder.md is truncated at line 153, missing Response Approach and Example Interactions sections
2. Model inconsistency: Consider using model: opus instead of sonnet for security-critical agents (matching security-auditor.md)

Required Improvements

• Shorten descriptions to 2-3 lines to match repository standards
• Address overlap with existing security-auditor.md - please add clear differentiation or consolidate
• Add use-case boundaries: Specify when to use these agents vs existing security-auditor

Minor Fixes

• Remove repetitive phrasing in behavioral traits (backend-security-coder.md:89-90)
• Complete the mobile agent's cross-platform examples

Please fix the truncated file and address the model/overlap concerns. The agents show promise but need these refinements before merging.

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Hi @wshobson , I have made the corresponding updates based on your revision requests. 👌

[wshobson]

Thanks for your contribution @ChanMeng666 . Looks great!