Plan Editor Task-Switch Stability Requirements

Overview

The Plan panel can remain open while a user selects another task. The UI system owns the editor and search-control lifecycle during that task change. The tasks system continues to own plan data and task selection.

Terminology

Available plan editor: The mounted editor for the selected task that can accept plan-search actions.
Plan-search action: A query update, query clear, next-match action, or previous-match action from the Plan panel.

Requirements

REQ-UI-PLAN-EDITOR-TASK-SWITCH-001: Stable editor replacement

Intent: Keep task navigation usable while Kandev replaces the plan editor.

User story: As a Kandev user, I want to switch tasks while the Plan panel is open, so that an outgoing editor cannot break the selected task page.

Acceptance criteria

AC-UI-PLAN-EDITOR-TASK-SWITCH-001.1: When a user selects another task while the Plan panel is mounted, the selected task page shall remain usable.
AC-UI-PLAN-EDITOR-TASK-SWITCH-001.2: During editor replacement, a plan-search action shall run only against the available plan editor.
AC-UI-PLAN-EDITOR-TASK-SWITCH-001.3: If no plan editor is available, a plan-search action shall not cause the task page to show its recovery screen.
AC-UI-PLAN-EDITOR-TASK-SWITCH-001.4: After the selected task editor is available, plan search shall update queries and navigate matches in that editor.
AC-UI-PLAN-EDITOR-TASK-SWITCH-001.5: A plan-comment command shall run only against the available plan editor.

Out of scope

Changing task selection, plan persistence, or saved Dockview layouts.
Changing Plan panel layout, touch controls, or responsive composition.
Changing the route error boundary or its recovery screen.
Changing optional voice services or analytics scripts.

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