diff --git a/packages/api/src/router/computation-graph-resource-snapshot.ts b/packages/api/src/router/computation-graph-resource-snapshot.ts
new file mode 100644
index 0000000..b3968c5
--- /dev/null
+++ b/packages/api/src/router/computation-graph-resource-snapshot.ts
@@ -0,0 +1,127 @@
+import {
+  calculateSAH,
+  getMonthRange,
+  DEFAULT_CALCULATION_RULES,
+} from "@capakraken/engine";
+import type { CalculationRule, SpainScheduleRule, WeekdayAvailability } from "@capakraken/shared";
+import type { TRPCContext } from "../trpc.js";
+import { loadResourceGraphAvailability } from "./computation-graph-resource-availability.js";
+
+export type ResourceGraphInput = {
+  resourceId: string;
+  month: string;
+};
+
+export async function loadResourceGraphSnapshot(
+  ctx: { db: TRPCContext["db"] },
+  input: ResourceGraphInput,
+) {
+  const [year, month] = input.month.split("-").map(Number) as [number, number];
+  const { start: monthStart, end: monthEnd } = getMonthRange(year, month);
+
+  const resource = await ctx.db.resource.findUniqueOrThrow({
+    where: { id: input.resourceId },
+    select: {
+      id: true,
+      displayName: true,
+      eid: true,
+      fte: true,
+      lcrCents: true,
+      chargeabilityTarget: true,
+      countryId: true,
+      federalState: true,
+      metroCityId: true,
+      availability: true,
+      country: { select: { id: true, code: true, name: true, dailyWorkingHours: true, scheduleRules: true } },
+      metroCity: { select: { id: true, name: true } },
+      managementLevelGroup: { select: { id: true, name: true, targetPercentage: true } },
+    },
+  });
+
+  const dailyHours = resource.country?.dailyWorkingHours ?? 8;
+  const scheduleRules = resource.country?.scheduleRules as SpainScheduleRule | null;
+  const targetPct = resource.managementLevelGroup?.targetPercentage ?? (resource.chargeabilityTarget / 100);
+
+  const availability = resource.availability as WeekdayAvailability | null;
+  const weeklyAvailability: WeekdayAvailability = availability ?? {
+    monday: dailyHours,
+    tuesday: dailyHours,
+    wednesday: dailyHours,
+    thursday: dailyHours,
+    friday: dailyHours,
+    saturday: 0,
+    sunday: 0,
+  };
+
+  const assignments = await ctx.db.assignment.findMany({
+    where: {
+      resourceId: input.resourceId,
+      startDate: { lte: monthEnd },
+      endDate: { gte: monthStart },
+      status: { in: ["CONFIRMED", "ACTIVE", "PROPOSED"] },
+    },
+    select: {
+      id: true,
+      hoursPerDay: true,
+      startDate: true,
+      endDate: true,
+      dailyCostCents: true,
+      status: true,
+      project: {
+        select: {
+          id: true,
+          name: true,
+          shortCode: true,
+          budgetCents: true,
+          winProbability: true,
+          utilizationCategory: { select: { code: true } },
+        },
+      },
+    },
+  });
+
+  const availabilitySummary = await loadResourceGraphAvailability({
+    db: ctx.db,
+    resource,
+    weeklyAvailability,
+    monthStart,
+    monthEnd,
+  });
+
+  let calcRules: CalculationRule[] = DEFAULT_CALCULATION_RULES;
+  try {
+    const dbRules = await ctx.db.calculationRule.findMany({
+      where: { isActive: true },
+      orderBy: [{ priority: "desc" }],
+    });
+    if (dbRules.length > 0) {
+      calcRules = dbRules as unknown as CalculationRule[];
+    }
+  } catch {
+    // table may not exist yet
+  }
+
+  const sahResult = calculateSAH({
+    dailyWorkingHours: dailyHours,
+    scheduleRules,
+    fte: resource.fte,
+    periodStart: monthStart,
+    periodEnd: monthEnd,
+    publicHolidays: availabilitySummary.publicHolidayStrings,
+    absenceDays: availabilitySummary.absenceDateStrings,
+  });
+
+  return {
+    assignments,
+    calcRules,
+    dailyHours,
+    monthEnd,
+    monthStart,
+    resource,
+    sahResult,
+    scheduleRules,
+    targetPct,
+    weeklyAvailability,
+    ...availabilitySummary,
+  };
+}
diff --git a/packages/api/src/router/computation-graph-resource.ts b/packages/api/src/router/computation-graph-resource.ts
index 8167386..ac0f540 100644
--- a/packages/api/src/router/computation-graph-resource.ts
+++ b/packages/api/src/router/computation-graph-resource.ts
@@ -1,90 +1,25 @@
-import {
-  calculateSAH,
-  getMonthRange,
-  DEFAULT_CALCULATION_RULES,
-} from "@capakraken/engine";
-import type { CalculationRule, SpainScheduleRule, WeekdayAvailability } from "@capakraken/shared";
-import type { TRPCContext } from "../trpc.js";
 import { buildResourceAllocationSummary } from "./computation-graph-resource-allocation.js";
-import { loadResourceGraphAvailability } from "./computation-graph-resource-availability.js";
 import { readResourceBudgetGraph } from "./computation-graph-resource-budget.js";
 import { buildResourceGraphSnapshot } from "./computation-graph-resource-graph.js";
-
-type ResourceGraphInput = {
-  resourceId: string;
-  month: string;
-};
+import {
+  loadResourceGraphSnapshot,
+  type ResourceGraphInput,
+} from "./computation-graph-resource-snapshot.js";
 
 export async function readResourceGraphSnapshot(
-  ctx: { db: TRPCContext["db"] },
+  ctx: Parameters<typeof loadResourceGraphSnapshot>[0],
   input: ResourceGraphInput,
 ) {
-  const [year, month] = input.month.split("-").map(Number) as [number, number];
-  const { start: monthStart, end: monthEnd } = getMonthRange(year, month);
-
-  const resource = await ctx.db.resource.findUniqueOrThrow({
-    where: { id: input.resourceId },
-    select: {
-      id: true,
-      displayName: true,
-      eid: true,
-      fte: true,
-      lcrCents: true,
-      chargeabilityTarget: true,
-      countryId: true,
-      federalState: true,
-      metroCityId: true,
-      availability: true,
-      country: { select: { id: true, code: true, name: true, dailyWorkingHours: true, scheduleRules: true } },
-      metroCity: { select: { id: true, name: true } },
-      managementLevelGroup: { select: { id: true, name: true, targetPercentage: true } },
-    },
-  });
-
-  const dailyHours = resource.country?.dailyWorkingHours ?? 8;
-  const scheduleRules = resource.country?.scheduleRules as SpainScheduleRule | null;
-  const targetPct = resource.managementLevelGroup?.targetPercentage ?? (resource.chargeabilityTarget / 100);
-
-  const avail = resource.availability as WeekdayAvailability | null;
-  const weeklyAvailability: WeekdayAvailability = avail ?? {
-    monday: dailyHours, tuesday: dailyHours, wednesday: dailyHours,
-    thursday: dailyHours, friday: dailyHours, saturday: 0, sunday: 0,
-  };
-
-  const assignments = await ctx.db.assignment.findMany({
-    where: {
-      resourceId: input.resourceId,
-      startDate: { lte: monthEnd },
-      endDate: { gte: monthStart },
-      status: { in: ["CONFIRMED", "ACTIVE", "PROPOSED"] },
-    },
-    select: {
-      id: true,
-      hoursPerDay: true,
-      startDate: true,
-      endDate: true,
-      dailyCostCents: true,
-      status: true,
-      project: {
-        select: {
-          id: true,
-          name: true,
-          shortCode: true,
-          budgetCents: true,
-          winProbability: true,
-          utilizationCategory: { select: { code: true } },
-        },
-      },
-    },
-  });
-
   const {
     absenceDateStrings,
     absenceDayEquivalent,
     absenceDays,
     absenceHoursDeduction,
+    assignments,
     baseAvailableHours,
     baseWorkingDays,
+    calcRules,
+    dailyHours,
     effectiveAvailableHours,
     effectiveHoursPerWorkingDay,
     effectiveWorkingDays,
@@ -92,55 +27,32 @@ export async function readResourceGraphSnapshot(
     holidayExamples,
     holidayScopeBreakdown,
     holidayScopeSummary,
+    monthEnd,
+    monthStart,
     publicHolidayCount,
     publicHolidayHoursDeduction,
-    publicHolidayStrings,
     publicHolidayWorkdayCount,
     resolvedHolidays,
-    sickDayCount,
-    vacationDayCount,
-  } = await loadResourceGraphAvailability({
-    db: ctx.db,
     resource,
-    weeklyAvailability,
-    monthStart,
-    monthEnd,
-  });
-
-  let calcRules: CalculationRule[] = DEFAULT_CALCULATION_RULES;
-  try {
-    const dbRules = await ctx.db.calculationRule.findMany({
-      where: { isActive: true },
-      orderBy: [{ priority: "desc" }],
-    });
-    if (dbRules.length > 0) {
-      calcRules = dbRules as unknown as CalculationRule[];
-    }
-  } catch {
-    // table may not exist yet
-  }
-
-  const sahResult = calculateSAH({
-    dailyWorkingHours: dailyHours,
+    sahResult,
     scheduleRules,
-    fte: resource.fte,
-    periodStart: monthStart,
-    periodEnd: monthEnd,
-    publicHolidays: publicHolidayStrings,
-    absenceDays: absenceDateStrings,
-  });
-
-  const assignmentSummary = buildResourceAllocationSummary({
-    assignments,
-    effectiveAvailableHours,
-    monthStart,
-    monthEnd,
-    resourceLcrCents: resource.lcrCents,
-    resourceFte: resource.fte,
+    sickDayCount,
     targetPct,
+    vacationDayCount,
     weeklyAvailability,
+  } = await loadResourceGraphSnapshot(ctx, input);
+
+  const allocationSummary = buildResourceAllocationSummary({
+    assignments,
     absenceDays,
     calcRules,
+    effectiveAvailableHours,
+    monthEnd,
+    monthStart,
+    resourceFte: resource.fte,
+    resourceLcrCents: resource.lcrCents,
+    targetPct,
+    weeklyAvailability,
   });
   const { nodes: budgetNodes, links: budgetLinks } = await readResourceBudgetGraph(
     ctx.db,
@@ -176,17 +88,17 @@ export async function readResourceGraphSnapshot(
     baseAvailableHours,
     effectiveAvailableHours,
     effectiveHoursPerWorkingDay,
-    totalWorkingDaysInMonth: assignmentSummary.totalWorkingDaysInMonth,
-    totalAllocHours: assignmentSummary.totalAllocHours,
-    totalAllocCostCents: assignmentSummary.totalAllocCostCents,
-    totalChargeableHours: assignmentSummary.totalChargeableHours,
-    totalProjectCostCents: assignmentSummary.totalProjectCostCents,
-    hasRulesEffect: assignmentSummary.hasRulesEffect,
-    dailyCostCents: assignmentSummary.dailyCostCents,
-    avgHoursPerDay: assignmentSummary.avgHoursPerDay,
-    utilizationPct: assignmentSummary.utilizationPct,
-    forecast: assignmentSummary.forecast,
-    chargeableHours: assignmentSummary.chargeableHours,
+    totalWorkingDaysInMonth: allocationSummary.totalWorkingDaysInMonth,
+    totalAllocHours: allocationSummary.totalAllocHours,
+    totalAllocCostCents: allocationSummary.totalAllocCostCents,
+    totalChargeableHours: allocationSummary.totalChargeableHours,
+    totalProjectCostCents: allocationSummary.totalProjectCostCents,
+    hasRulesEffect: allocationSummary.hasRulesEffect,
+    dailyCostCents: allocationSummary.dailyCostCents,
+    avgHoursPerDay: allocationSummary.avgHoursPerDay,
+    utilizationPct: allocationSummary.utilizationPct,
+    forecast: allocationSummary.forecast,
+    chargeableHours: allocationSummary.chargeableHours,
     budgetNodes,
     budgetLinks,
     resolvedHolidays: resolvedHolidays.map((holiday) => ({
@@ -196,7 +108,7 @@ export async function readResourceGraphSnapshot(
       calendarName: holiday.calendarName,
       sourceType: holiday.sourceType ?? null,
     })),
-    assignmentBreakdown: assignmentSummary.assignmentBreakdown,
+    assignmentBreakdown: allocationSummary.assignmentBreakdown,
     absenceDayEquivalent,
   });
 }