opencode export outputs messages in wrong order for long sessions

[jchuder]

Description

opencode export <session_id> outputs messages in wrong order for long sessions. The first part of the conversation appears in the middle or end of the export.

Root cause: Session.messages() uses result.reverse() which only reverses the alphabetical order from Storage.list(). Message IDs are random strings (e.g., msg_19b9ed* vs msg_b9946c*), so alphabetical order ≠ chronological order.

Plugins

None

OpenCode version

1.1.8

Steps to reproduce

1. Create a long session with 100+ messages over multiple hours/days
2. Run opencode export <session_id>
3. Check the message order — early messages appear in the middle or end instead of the beginning

Screenshot and/or share link

N/A

Operating System

macOS

Terminal

Ghostty

[github-actions]

This issue might be a duplicate of or related to existing issues. Please check:

• old messages disappear #7380: old messages disappear - related to message persistence in long sessions
• Cannot scroll to beginning of long conversations (message limit hardcoded to 100) (#6138) #6137: Cannot scroll to beginning of long conversations - also affects long session handling
• feat: virtualized scrolling + paginated message loading for long sessions #6548: feat: virtualized scrolling + paginated message loading - proposes solutions for long session message handling

These issues are related to message ordering/handling in long sessions but may have different root causes. Feel free to ignore if your specific case differs from these.