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Need: The Gmail integration had several parsing issues that were causing data loss and workflow incompatibilities: 1. Email recipient parsing only captured the first recipient, losing CC/BCC and multiple TO recipients 2. Email body parsing was inconsistent between blocks, sometimes showing "This email does not contain a readable body" for valid emails 3. Type mismatches between blocks caused serialization issues when connecting them in workflows (lists being converted to string representations like "[\"email@example.com\"]") # Changes 🏗️ 1. Enhanced Email Model: - Added cc and bcc fields to capture all recipients - Changed to field from string to list for consistency - Now captures all recipients instead of just the first one 2. Improved Email Parsing: - Updated GmailReadBlock and GmailGetThreadBlock to parse all recipients using getaddresses() - Unified email body parsing logic across blocks with robust multipart handling - Added support for HTML to plain text conversion - Fixed handling of emails with attachments as body content 3. Fixed Block Compatibility: - Updated GmailSendBlock and GmailCreateDraftBlock to accept lists for recipient fields - Added validation to ensure at least one recipient is provided - All blocks now consistently use lists for recipient fields, preventing serialization issues 4. Updated Test Data: - Modified all test inputs/outputs to use the new list format for recipients - Ensures tests reflect the new data structure # Checklist 📋 For code changes: - I have clearly listed my changes in the PR description - I have made a test plan - I have tested my changes according to the test plan: - Run existing Gmail block unit tests with poetry run test - Create a workflow that reads emails with multiple recipients and verify all TO, CC, BCC recipients are captured - Test email body parsing with plain text, HTML, and multipart emails - Connect GmailReadBlock → GmailSendBlock in a workflow and verify recipient data flows correctly - Connect GmailReplyBlock → GmailSendBlock and verify no serialization errors occur - Test sending emails with multiple recipients via GmailSendBlock - Test creating drafts with multiple recipients via GmailCreateDraftBlock - Verify backwards compatibility by testing with single recipient strings (should now require lists) - Create from scratch and execute an agent with at least 3 blocks - Import an agent from file upload, and confirm it executes correctly - Upload agent to marketplace - Import an agent from marketplace and confirm it executes correctly - Edit an agent from monitor, and confirm it executes correctly # Breaking Change Note: The to field in GmailSendBlock and GmailCreateDraftBlock now requires a list instead of accepting both string and list. Existing workflows using strings will need to be updated to use lists (e.g., ["email@example.com"] instead of "email@example.com"). --------- Co-authored-by: Zamil Majdy <zamil.majdy@agpt.co>