diff --git a/src/trpc/routers/task.ts b/src/trpc/routers/task.ts
index 6c3c4a1..a52eeb8 100644
--- a/src/trpc/routers/task.ts
+++ b/src/trpc/routers/task.ts
@@ -131,14 +131,16 @@ export function taskProcedures(publicProcedure: ProcedureBuilder) {
       .input(z.object({ initiativeId: z.string().min(1) }))
       .query(async ({ ctx, input }) => {
         const taskRepository = requireTaskRepository(ctx);
-        return taskRepository.findByInitiativeId(input.initiativeId);
+        const tasks = await taskRepository.findByInitiativeId(input.initiativeId);
+        return tasks.filter((t) => t.category !== 'decompose');
       }),
 
     listPhaseTasks: publicProcedure
       .input(z.object({ phaseId: z.string().min(1) }))
       .query(async ({ ctx, input }) => {
         const taskRepository = requireTaskRepository(ctx);
-        return taskRepository.findByPhaseId(input.phaseId);
+        const tasks = await taskRepository.findByPhaseId(input.phaseId);
+        return tasks.filter((t) => t.category !== 'decompose');
       }),
 
     approveTask: publicProcedure