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Planning mode: subagents can trigger plan_exit, plan not shown before build switch, question text renders as plain text #18515
Description
Description
Three issues with the experimental planning mode:
-
Subagents can escape plan mode: When the plan agent spawns subagents (explore/general), those child sessions have access to
plan_exit, allowing them to accidentally trigger a switch to build mode. A user could then accidentally confirm, putting the session into build mode prematurely. -
Plan not shown before asking to proceed: When
plan_exitis called, the question just says "Plan at X is complete. Would you like to switch?" but doesn't show the plan content. The user must blindly decide whether to approve. -
Question text renders as plain text: The question dock renders
question.questionas raw text, not markdown. Even if the plan content were included, it would display unformatted — no headers, lists, code blocks, etc.
Steps to reproduce
- Enable experimental plan mode (
OPENCODE_EXPERIMENTAL_PLAN_MODE=1) - Start a planning session — the plan agent spawns explore subagents
- Observe that subagents can call
plan_exitand offer to switch to build mode - When the plan agent completes and calls
plan_exit, the question dock shows a generic message without the plan content - Any markdown in question text (headers, code, lists) appears as raw plain text
OpenCode version
Latest dev
Operating System
Linux
Activity
github-actions commentedon Mar 21, 2026
This issue might be a duplicate of existing issues. Please check:
BYK commentedon Mar 21, 2026
Good catch — point 3 (question text rendered as plain text instead of markdown) overlaps with #12781.
Our PR #18516 fixes this for the web UI by using the
Markdowncomponent in both the live question dock (session-question-dock.tsx) and historical question display (message-part.tsx). The TUI side (#12781 also mentions terminal rendering) is not addressed here.Points 1 and 2 (subagent plan escape + plan content not shown in exit prompt) are unique to this issue.
github-actions commentedon Jul 4, 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.
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