Add CONTRIBUTING guidelines with AI usage & review policy

[Copilot]

Adds comprehensive contributing guidelines to the repository with explicit policy permitting AI tools (including GitHub Copilot) under human supervision, disclosure, and security/licensing safeguards.

What's Added

This PR introduces a complete .github/CONTRIBUTING.md file that provides:

• Comprehensive contribution workflow covering the entire process from fork to merge
• Explicit AI tools policy that encourages responsible use of GitHub Copilot and other AI assistants
• Clear development guidelines including branching strategy, commit conventions, and code quality standards
• Detailed setup instructions specific to DeyWeaver's Node.js/TypeScript/Genkit stack
• Security best practices for handling API keys and sensitive data

Key Features

AI Tools Policy

The guide explicitly allows and encourages AI tool usage under these conditions:

• Human supervision and review of all AI-generated code
• Full understanding required before submission
• Disclosure requirement for substantial AI-generated sections (>50 lines)
• Security validation and license compliance verification
• Quality standards maintained for AI-assisted contributions

Pull Request Integration

• Added AI assistance disclosure checkbox to PR checklist
• Provided complete template for documenting AI tool usage
• Clear guidelines for reviewing AI-generated contributions

Developer Experience

• Step-by-step setup instructions using project's actual tech stack
• Conventional Commits examples with DeyWeaver-specific scenarios
• Branching strategy aligned with common open source practices
• Comprehensive issue reporting and feature request guidelines

Structure

The guide includes all essential sections:

• Getting Started (Node.js v18+, npm, Google AI API setup)
• Branching Strategy (feature/, fix/, docs/, chore/ conventions)
• Code Style & Quality (TypeScript, ESLint placeholders)
• Security & Secrets (no-commit policy for API keys)
• Communication Channels (GitHub Issues as primary)
• Attribution recognizing project creator Aryan Singh

Implementation Notes

• Uses TODO comments for project-specific details that need future clarification
• Maintains friendly, welcoming tone consistent with project culture
• Provides placeholder for Code of Conduct (none currently exists)
• Includes complete Table of Contents for easy navigation
• Safe from sensitive data exposure

This establishes a solid foundation for community contributions while explicitly supporting modern AI-assisted development workflows under proper human oversight.

This pull request was created as a result of the following prompt from Copilot chat.

Add a comprehensive contributing guide to the repository.

Goal:
Create a CONTRIBUTING.md (preferred path: .github/CONTRIBUTING.md) that documents how to contribute and explicitly allows the use of AI tools (including GitHub Copilot) under proper human supervision, review, and disclosure.

Deliverables:

1. New file: .github/CONTRIBUTING.md (create .github directory if missing).
2. Content sections:
   • Welcome / Overview
   • Code of Conduct (link if CODE_OF_CONDUCT.md exists; else placeholder)
   • Getting Started (prerequisites, clone, install commands with TODO placeholders if unknown)
   • Project Structure (with TODO placeholders if structure cannot be inferred)
   • Branching Strategy (feature/, fix/, docs/, chore/ naming)
   • Issue Reporting (what to include: steps, expected vs actual, environment)
   • Feature Requests (encourage discussion before large changes)
   • Development Workflow (fork/clone, branch, code, tests, format, PR)
   • Code Style & Quality (formatting, linting, types – placeholders if not present)
   • Commit Message Guidelines (Conventional Commits, examples)
   • Testing (how to run tests – placeholder if unknown)
   • Pull Request Guidelines (description, link issues, checklist)
   • Security & Secrets (no secrets, responsible disclosure placeholder)
   • Use of AI Tools & GitHub Copilot (explicit policy: allowed if human-reviewed, understood, disclosed for large sections, license respected, validated for security/performance, no sensitive prompt data)
   • Documentation (update README and inline docs when behavior changes)
   • Release Process (placeholder)
   • Communication Channels (issues, placeholders for others)
   • Attribution & Credits
   • Acknowledgment (agreement to guidelines & AI review disclosure)

Special Requirements:

• Explicit section titled "Use of AI Tools & GitHub Copilot" with bullet list conditions.
• Include PR checklist referencing AI review requirement.
• Provide example commit messages and PR description snippet.
• Use clear Markdown headings (##) and bullet lists.
• Safe from secrets; no sensitive data.

Implementation Notes:

• If an existing CONTRIBUTING file is found (.github/CONTRIBUTING.md or CONTRIBUTING.md), merge new sections without deleting unique existing info; otherwise create new.
• If CODE_OF_CONDUCT.md exists, link it; else add placeholder encouraging respectful behavior.
• Use TODO comments where repo-specific commands or tools cannot be inferred.
• Friendly, concise tone.

Acceptance Criteria:

• File renders properly.
• All required sections present (with TODOs where unknown).
• Explicit AI usage allowance under supervision & review.
• PR opened with clear title and summary referencing AI policy addition.

PR Title Suggestion:
Add CONTRIBUTING guidelines with AI usage & review policy

PR Body Summary Suggestion:
Adds comprehensive contributing guide (workflow, branching, issues, commits, testing, PR checklist) and explicit policy permitting AI (including GitHub Copilot) under human supervision, disclosure, and security/licensing safeguards.

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