Add CLAUDE.md and AGENTS.md for AI-assisted development guidance

[varadarajan-tw]

Document repository architecture, common commands, destination/action patterns, development workflows, and testing conventions to help Claude Code work effectively in this monorepo.

Testing

N/A

• Added unit tests for new functionality
• Tested end-to-end using the local server
• [If destination is already live] Tested for backward compatibility of destination. Note: New required fields are a breaking change.
• [Segmenters] Tested in the staging environment
• [Segmenters] [If applicable for this change] Tested for regression with Hadron.

Security Review

Please ensure sensitive data is properly protected in your integration.

• Reviewed all field definitions for sensitive data (API keys, tokens, passwords, client secrets) and confirmed they use type: 'password'

New Destination Checklist

• Extracted all action API versions to verioning-info.ts file. example

[Copilot]

Pull request overview

This pull request adds comprehensive AI-assisted development documentation to help Claude Code and other AI agents work effectively with the Action Destinations monorepo. The documentation provides detailed guidance on repository architecture, common commands, development workflows, testing patterns, and best practices.

Changes:

• Added CLAUDE.md with comprehensive repository documentation covering architecture, commands, patterns, and best practices
• Added AGENTS.md as a reference file to point AI tools to CLAUDE.md

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
CLAUDE.md	Comprehensive AI development guide covering repository structure, commands, architecture patterns, error handling, testing conventions, and PR guidelines
AGENTS.md	Reference pointer to CLAUDE.md for AI agent tools

[Copilot]

The AGENTS.md file appears to contain the full content of CLAUDE.md instead of just a reference to it. According to the diff, this file should only contain the text "CLAUDE.md" on line 1, which would serve as a pointer for AI tools. However, the actual file contains the entire CLAUDE.md documentation. This duplication creates a maintenance issue where both files would need to be updated for any changes.

[Copilot]

The file path for the browser destination registry is incorrect. The path should be packages/destinations-manifest/src/index.ts (note the /src/ directory), not packages/destinations-manifest/index.ts. This is where browser-mode destinations are registered.

Suggested change

	- **browser-destinations** (`packages/browser-destinations`): Device-mode (client-side) destinations. New destinations must be registered in `packages/destinations-manifest/index.ts`.
	- **browser-destinations** (`packages/browser-destinations`): Device-mode (client-side) destinations. New destinations must be registered in `packages/destinations-manifest/src/index.ts`.

[Copilot]

The file path for the browser destination registry is incorrect. The path should be packages/destinations-manifest/src/index.ts (note the /src/ directory), not packages/destinations-manifest/index.ts.

Suggested change

	- `packages/destinations-manifest/index.ts`: Browser destination registry
	- `packages/destinations-manifest/src/index.ts`: Browser destination registry