Add REVIEW.md for Claude Code automated reviews

Author: paulbalaji

REVIEW.md

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+# Code Review Guidelines
+
+## Code Quality
+
+- Logic errors and potential bugs
+- Error handling and edge cases
+- Code clarity and maintainability
+- Adherence to existing patterns in the codebase
+- **Use existing utilities** - Search codebase before adding new helpers
+- **Prefer `??` over `||`** - Preserves zero/empty string as valid values
+
+## Architecture
+
+- Consistency with existing architecture patterns
+- Breaking changes or backward compatibility issues
+- API contract changes
+- **Deduplicate** - Move repeated code/types to shared files
+- **Extract utilities** - Shared functions belong in utils packages
+
+## Testing
+
+- Test coverage for new/modified code
+- Edge cases that should be tested
+- **New utility functions need unit tests**
+
+## Performance
+
+- Gas efficiency (for Solidity changes)
+- Unnecessary allocations or computations
+
+## Registry-Specific
+
+- **Warp ID format** - Must be `{SYMBOL}/{label}` (e.g., `USDC/ethereum-arbitrum`)
+- **Address provenance** - Note source of address changes (monorepo PR, deployment tx)
+- **Changeset required** - Include changeset for version bumps
+- **YAML keys alphabetical** - ESLint enforces sorted keys
+- **No Node.js in main src/** - Only `src/fs/` can import Node.js modules
+- **Deterministic ordering** - Sort arrays/maps before processing