Infinite compaction loop on every response even with empty session

[GraveEaterMadison]

recording_2026-06-07_08.25.46.mp4

Description

OpenCode enters an infinite compaction loop immediately after any message, even "hi" with zero config, no skills, no agents, no commands, and no AGENTS.md/CLAUDE.md files. Every response triggers Build → Compaction → Build → Compaction indefinitely.

Plugins

No response

OpenCode version

1.16.2

Steps to reproduce

1. Fresh install with no config
2. Open OpenCode
3. Type "hi"
4. Observe infinite Build/Compaction loop

Screenshot and/or share link

Operating System

Arch linux

Terminal

kitty

[github-actions]

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

• Infinite Build ↔ Compaction loop after task completion #31111: Infinite Build ↔ Compaction loop after task completion (very similar symptom)
• OpenCode immediately enters auto-compaction loop and stops generating responses #30680: OpenCode immediately enters auto-compaction loop and stops generating responses (same behavior on fresh session)
• bug(session): infinite compaction loop when compression fails to reduce context #27924: bug(session): infinite compaction loop when compression fails to reduce context (same loop pattern)
• OpenCode immediately triggers “Input exceeds context window” and auto-compaction in empty sessions after latest update #27315: OpenCode immediately triggers compaction in empty sessions after latest update (similar empty-session scenario)

If your issue is distinct from all of the above, please add a comment explaining how it differs so maintainers can keep it open.