diff --git a/packages/api/src/__tests__/timeline-allocation-mutation-support.test.ts b/packages/api/src/__tests__/timeline-allocation-mutation-support.test.ts
index 097b215..dd2b30e 100644
--- a/packages/api/src/__tests__/timeline-allocation-mutation-support.test.ts
+++ b/packages/api/src/__tests__/timeline-allocation-mutation-support.test.ts
@@ -5,9 +5,6 @@ import {
   buildTimelineAllocationEntryUpdate,
   buildTimelineAllocationMetadata,
   buildTimelineBatchShiftAuditChanges,
-  buildTimelineQuickAssignAssignmentInput,
-  buildTimelineQuickAssignMetadata,
-  calculateTimelineAllocationPercentage,
   shiftTimelineAllocationWindow,
   validateTimelineAllocationDateRanges,
 } from "../router/timeline-allocation-mutation-support.js";
@@ -39,43 +36,6 @@ describe("timeline allocation mutation support", () => {
       )).toThrowError(TRPCError);
   });
 
-  it("rounds allocation percentages and clamps them to 100", () => {
-    expect(calculateTimelineAllocationPercentage(3.9)).toBe(49);
-    expect(calculateTimelineAllocationPercentage(9)).toBe(100);
-  });
-
-  it("builds source metadata for quick assign operations", () => {
-    expect(buildTimelineQuickAssignMetadata("quickAssign")).toEqual({ source: "quickAssign" });
-    expect(buildTimelineQuickAssignMetadata("batchQuickAssign")).toEqual({ source: "batchQuickAssign" });
-  });
-
-  it("builds assignment create payloads for quick assign flows", () => {
-    expect(
-      buildTimelineQuickAssignAssignmentInput({
-        resourceId: "resource_1",
-        projectId: "project_1",
-        startDate: new Date("2026-04-01T00:00:00.000Z"),
-        endDate: new Date("2026-04-05T00:00:00.000Z"),
-        hoursPerDay: 6,
-        role: "Engineer",
-        roleId: "role_1",
-        status: "PROPOSED",
-        source: "quickAssign",
-      }),
-    ).toEqual({
-      resourceId: "resource_1",
-      projectId: "project_1",
-      startDate: new Date("2026-04-01T00:00:00.000Z"),
-      endDate: new Date("2026-04-05T00:00:00.000Z"),
-      hoursPerDay: 6,
-      percentage: 75,
-      role: "Engineer",
-      roleId: "role_1",
-      status: "PROPOSED",
-      metadata: { source: "quickAssign" },
-    });
-  });
-
   it("shifts and clamps allocation windows for each batch-shift mode", () => {
     expect(
       shiftTimelineAllocationWindow({
diff --git a/packages/api/src/__tests__/timeline-allocation-quick-assign-support.test.ts b/packages/api/src/__tests__/timeline-allocation-quick-assign-support.test.ts
new file mode 100644
index 0000000..65ecd18
--- /dev/null
+++ b/packages/api/src/__tests__/timeline-allocation-quick-assign-support.test.ts
@@ -0,0 +1,45 @@
+import { describe, expect, it } from "vitest";
+import {
+  buildTimelineQuickAssignAssignmentInput,
+  buildTimelineQuickAssignMetadata,
+  calculateTimelineAllocationPercentage,
+} from "../router/timeline-allocation-quick-assign-support.js";
+
+describe("timeline allocation quick assign support", () => {
+  it("rounds allocation percentages and clamps them to 100", () => {
+    expect(calculateTimelineAllocationPercentage(3.9)).toBe(49);
+    expect(calculateTimelineAllocationPercentage(9)).toBe(100);
+  });
+
+  it("builds source metadata for quick assign operations", () => {
+    expect(buildTimelineQuickAssignMetadata("quickAssign")).toEqual({ source: "quickAssign" });
+    expect(buildTimelineQuickAssignMetadata("batchQuickAssign")).toEqual({ source: "batchQuickAssign" });
+  });
+
+  it("builds assignment create payloads for quick assign flows", () => {
+    expect(
+      buildTimelineQuickAssignAssignmentInput({
+        resourceId: "resource_1",
+        projectId: "project_1",
+        startDate: new Date("2026-04-01T00:00:00.000Z"),
+        endDate: new Date("2026-04-05T00:00:00.000Z"),
+        hoursPerDay: 6,
+        role: "Engineer",
+        roleId: "role_1",
+        status: "PROPOSED",
+        source: "quickAssign",
+      }),
+    ).toEqual({
+      resourceId: "resource_1",
+      projectId: "project_1",
+      startDate: new Date("2026-04-01T00:00:00.000Z"),
+      endDate: new Date("2026-04-05T00:00:00.000Z"),
+      hoursPerDay: 6,
+      percentage: 75,
+      role: "Engineer",
+      roleId: "role_1",
+      status: "PROPOSED",
+      metadata: { source: "quickAssign" },
+    });
+  });
+});
diff --git a/packages/api/src/router/timeline-allocation-mutation-support.ts b/packages/api/src/router/timeline-allocation-mutation-support.ts
index 81713e1..4f09ec8 100644
--- a/packages/api/src/router/timeline-allocation-mutation-support.ts
+++ b/packages/api/src/router/timeline-allocation-mutation-support.ts
@@ -1,5 +1,4 @@
 import { Prisma } from "@capakraken/db";
-import { AllocationStatus } from "@capakraken/shared";
 import { TRPCError } from "@trpc/server";
 
 export type TimelineBatchShiftMode = "move" | "resize-start" | "resize-end";
@@ -32,39 +31,6 @@ export function buildTimelineAllocationMetadata(input: {
   return { metadata, includeSaturday };
 }
 
-export function calculateTimelineAllocationPercentage(hoursPerDay: number): number {
-  return Math.min(100, Math.round((hoursPerDay / 8) * 100));
-}
-
-export function buildTimelineQuickAssignMetadata(source: "quickAssign" | "batchQuickAssign") {
-  return { source } satisfies Record<string, unknown>;
-}
-
-export function buildTimelineQuickAssignAssignmentInput(input: {
-  resourceId: string;
-  projectId: string;
-  startDate: Date;
-  endDate: Date;
-  hoursPerDay: number;
-  role: string;
-  roleId?: string | undefined;
-  status: AllocationStatus;
-  source: "quickAssign" | "batchQuickAssign";
-}) {
-  return {
-    resourceId: input.resourceId,
-    projectId: input.projectId,
-    startDate: input.startDate,
-    endDate: input.endDate,
-    hoursPerDay: input.hoursPerDay,
-    percentage: calculateTimelineAllocationPercentage(input.hoursPerDay),
-    role: input.role,
-    ...(input.roleId !== undefined ? { roleId: input.roleId } : {}),
-    status: input.status,
-    metadata: buildTimelineQuickAssignMetadata(input.source),
-  };
-}
-
 export function validateTimelineAllocationDateRanges(
   ranges: Array<{ startDate: Date; endDate: Date }>,
 ): void {
diff --git a/packages/api/src/router/timeline-allocation-procedure-support.ts b/packages/api/src/router/timeline-allocation-procedure-support.ts
index 79a2ba4..c0aa181 100644
--- a/packages/api/src/router/timeline-allocation-procedure-support.ts
+++ b/packages/api/src/router/timeline-allocation-procedure-support.ts
@@ -9,9 +9,9 @@ import {
 } from "../sse/event-bus.js";
 import {
   assertTimelineDateRangeValid,
-  buildTimelineQuickAssignAssignmentInput,
   validateTimelineAllocationDateRanges,
 } from "./timeline-allocation-mutation-support.js";
+import { buildTimelineQuickAssignAssignmentInput } from "./timeline-allocation-quick-assign-support.js";
 import { applyTimelineBatchAllocationShift } from "./timeline-allocation-shift-support.js";
 
 export async function createTimelineQuickAssignment(
diff --git a/packages/api/src/router/timeline-allocation-quick-assign-support.ts b/packages/api/src/router/timeline-allocation-quick-assign-support.ts
new file mode 100644
index 0000000..471fae1
--- /dev/null
+++ b/packages/api/src/router/timeline-allocation-quick-assign-support.ts
@@ -0,0 +1,34 @@
+import { AllocationStatus } from "@capakraken/shared";
+
+export function calculateTimelineAllocationPercentage(hoursPerDay: number): number {
+  return Math.min(100, Math.round((hoursPerDay / 8) * 100));
+}
+
+export function buildTimelineQuickAssignMetadata(source: "quickAssign" | "batchQuickAssign") {
+  return { source } satisfies Record<string, unknown>;
+}
+
+export function buildTimelineQuickAssignAssignmentInput(input: {
+  resourceId: string;
+  projectId: string;
+  startDate: Date;
+  endDate: Date;
+  hoursPerDay: number;
+  role: string;
+  roleId?: string | undefined;
+  status: AllocationStatus;
+  source: "quickAssign" | "batchQuickAssign";
+}) {
+  return {
+    resourceId: input.resourceId,
+    projectId: input.projectId,
+    startDate: input.startDate,
+    endDate: input.endDate,
+    hoursPerDay: input.hoursPerDay,
+    percentage: calculateTimelineAllocationPercentage(input.hoursPerDay),
+    role: input.role,
+    ...(input.roleId !== undefined ? { roleId: input.roleId } : {}),
+    status: input.status,
+    metadata: buildTimelineQuickAssignMetadata(input.source),
+  };
+}