Agent terminates/stops prematurely mid-task without explicit error [v1.18.20]

Description

OpenCode agent stops prematurely during long-running tasks, without any error message. The session may display "Task completed" or exit silently, but the actual goal is not achieved. This occurs frequently when the agent is performing multiple tool calls, during context compaction, or after a subagent returns. No explicit error is shown in the console. This issue has been reported in several earlier versions and appears to persist in v1.18.20.

Plugins

No custom plugins installed.

OpenCode version

1.18.20

Steps to reproduce

1. Start OpenCode with a goal that involves multiple steps (e.g., a multi‑turn analysis or a task requiring several tool calls and context processing).
2. Allow the agent to execute; observe it performing actions, possibly triggering context compaction.
3. Notice that the agent stops before the goal is reached – often after a compaction cycle or after a subagent call.
4. The session ends without any error message; the console may show "Task completed" even though the work is unfinished.

Screenshot and/or share link

N/A – no screenshot available

Operating System

Ubuntu 26.04

Terminal

bash