bufio.Scanner: token too long

[yudgnahk]

Description

I got this issue. The opencode is quite lagging. And the response can't be displayed properly. But the agent is still running.

OpenCode version

0.15.19

Steps to reproduce

1. I have a plan folder with 10 phases and 10 checklists.
2. At the end of each message, I ask to update the checklist.
3. And I opened just one session for 4 phases, and I'm in phase 5.

I think it's because the I/O buffer is over range. Then it causes the lagging.

Screenshot and/or share link

Operating System

macOS 15.7.1

Terminal

iTerm2

[github-actions]

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

• Opencode stuck after token too long #3409: Both report the same "bufio.Scanner: token too long" error, with OpenCode becoming unresponsive and getting stuck on "Generating" or having display issues. The underlying problem appears to be the same - the bufio.Scanner hitting limits when processing large amounts of data/tokens.

Feel free to ignore if none of these address your specific case.

[rekram1-node]

closing as duplicate of #3409, I will try to figure this bug out today