Description

Three issues with the experimental planning mode:

1. 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.

2. Plan not shown before asking to proceed: When plan_exit is 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.

3. Question text renders as plain text: The question dock renders question.question as raw text, not markdown. Even if the plan content were included, it would display unformatted — no headers, lists, code blocks, etc.

Steps to reproduce

1. Enable experimental plan mode (OPENCODE_EXPERIMENTAL_PLAN_MODE=1)
2. Start a planning session — the plan agent spawns explore subagents
3. Observe that subagents can call plan_exit and offer to switch to build mode
4. When the plan agent completes and calls plan_exit, the question dock shows a generic message without the plan content
5. Any markdown in question text (headers, code, lists) appears as raw plain text

OpenCode version

Latest dev

Operating System

Linux