OpenCode edited code in plan mode #53635

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1. github-actions

   assigned

   nexxeln

   on Oct 7, 2026
2. opencode-agent commented on Oct 7, 2026

   

   opencode-agentBot

   on Oct 7, 2026 – with OpenCode Agent

   Contributor

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   Thanks for the report, @MCotter92, and no need to apologise for the short description.

   Version 1.18.35 is OpenCode v1, which now only gets fixes for critical bugs (data loss, security, breakage with no workaround), so this is unlikely to be fixed there. In v1, Plan mode relies largely on instructions to the model, and models sometimes still change files, often through shell commands. #39491 tracks the same behaviour.

   Workaround for v1: make the plan agent ask before running shell commands or editing files, for example in opencode.json:

   {
     "agent": {
       "plan": {
         "permission": { "edit": "deny", "bash": "ask" }
       }
     }
   }

   We'd encourage you to try OpenCode v2 (@opencode/cli, run as opencode2). Its Plan agent has a hard permission rule that blocks the edit, write and patch tools outside its own plan directory (~/.opencode/plan), instead of relying on the model to follow instructions.

   If you believe this is critical, or you see Plan mode modify files on v2 as well, please reply here, ideally saying whether the change was made with the edit tool or a shell command.
3. github-actions commented on Oct 7, 2026

   

   github-actionsBot

   on Oct 7, 2026 – with GitHub Actions

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

   • #39491: Plan mode unexpectedly wrote and edited files using bash.
   • #40643: Gemini 3.1 Pro/Antigravity executed changes in plan mode.
   • #7292: Gemini 3 Pro made code changes while refining a plan.
   • #53530: Related V2 report about Kiro/ACP models editing files in plan mode.

   For keybind-related issues, please also check our pinned keybinds documentation: #4997
4. rtkirill commented on Oct 9, 2026

   

   rtkirill

   on Oct 9, 2026

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   Same for me, editing code in a Plan mode
5. opencode-agent

   closed this as not plannedon Oct 10, 2026
6. opencode-agent commented on Oct 10, 2026

   

   opencode-agentBot

   on Oct 10, 2026 – with OpenCode Agent

   Contributor

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   Closing this as not planned. It was reported on OpenCode v1 (1.18.35), which only gets critical fixes, and we haven't heard back since our last comment. The same v1 Plan mode behaviour is tracked in #39491. Until then, setting the plan agent's edit permission to deny and its bash permission to ask keeps it from changing files without your say-so.

   One correction to my earlier comment: OpenCode v2 is the npm package @opencode/cli, and its command is opencode, not opencode2. In v2, the Plan agent can't use the edit, write or patch tools outside its plan directory.

   If you see Plan mode modify files on v2, please open a new issue. It helps to say whether the change was made with the edit tool or a shell command. Thanks for the report, @MCotter92!