'Plan' agent does not adhere to the plan rule. #11441
Description
Description
The 'Plan' agent does not adhere to the planning only rule, and start making code changes. This does not always happen but it does start making code changes occasionally.
Plugins
No response
OpenCode version
v1.1.43
Steps to reproduce
- to enter plan mode, then prompt agents to work on planning a few turns.
- Without explicitly telling the agent to make code changes, it start doing it on its own.
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Operating System
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Terminal
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Reacted by Alikhan Oitan, Ozgur Dogan Ugurlu, xmready and Tom Faulkner
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github-actions commentedon Jan 31, 2026
This issue might be a duplicate of existing issues. Please check:
planagent runs amock and starts writing #10057:planagent runs amock and starts writingFeel free to ignore if none of these address your specific case.
oitan commentedon Feb 16, 2026
confirming this for OpenCode v1.2.5
ozozozd commentedon Mar 5, 2026
Confirming as well.
I am under the impression that the decision to write or not remains with the model. In other words, the plan contract isn't enforced by OpenCode's architecture, it's expected to be respected by the LLM.
xmready commentedon Mar 20, 2026
I'm also confirming this. Sometimes plan mode asks me for permission before creating /tmp directories and files and sometimes it just does it. Whatever the guardrails are, they need to be made more sturdy.
github-actions commentedon Jul 3, 2026
To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.