Document temporarily disabled kanban cancel column in CLAUDE.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -6,6 +6,23 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 **⚠️ DO NOT auto-commit code changes.** Always ask the user before committing. Only create commits when the user explicitly requests it with commands like "commit this work" or "create a commit".
 
+## Temporarily Disabled Features
+
+### Kanban Cancel Column (disabled)
+
+The "Cancelled" column has been temporarily hidden from the kanban board API response to reduce UI clutter. The underlying code is preserved and can be re-enabled by searching for `TEMPORARILY DISABLED - Cancel column hidden from kanban` in `internal/repositories/task_repo.go`.
+
+**What's disabled:**
+- Cancel column not returned in kanban API responses (`/api/tasks/` and `/api/tasks/by-residence/:id/`)
+- `GetCancelledTasks()` query not executed
+
+**What's preserved:**
+- `ColumnCancelled` constant in categorization
+- `CancelledHandler` and `ArchivedHandler` in categorization chain
+- `IsCancelled()` predicate
+- `GetCancelledTasks()` function
+- All database models and fields (`is_cancelled`, `is_archived`)
+
 ## Required Reading Before Task-Related Work
 
 **STOP! Before writing ANY task-related code, you MUST read:**