fix(curator): preserve active sprint on reads

scripts/curator-onboarding-reconcile.test.ts

@@ -6,6 +6,7 @@ import {
   decideCuratorSprintReconciliation,
   resolveCuratorSprintAccess,
   shouldReconcileCuratorSprint,
+  shouldRebaseCuratorSprintForOnboardingContext,
 } from "../src/v1/curator/curator-store.js";
 import { templateSetFor, trialDaysFor } from "../src/v1/curator/task-registry.js";
 
@@ -51,6 +52,26 @@ const startDate = "2026-07-13";
 const studentFingerprint = curatorSprintPlanFingerprint({ startDate, variantId: "student_recent_grad", durationDays: 2, access: "trial" });
 const experiencedFingerprint = curatorSprintPlanFingerprint({ startDate, variantId: "experienced_professional", durationDays: 2, access: "trial" });
 const experiencedPlan = curatorSprintTaskPlan({ startDate, variantId: "experienced_professional", durationDays: 2, access: "trial" });
+assert.equal(
+  shouldRebaseCuratorSprintForOnboardingContext({
+    existingStartDate: "2026-07-14",
+    focusDate: "2026-07-15",
+    onboardingContextProvided: true,
+    existingCompatible: true,
+  }),
+  false,
+  "a normal sprint read with onboarding context must preserve the active sprint across days",
+);
+assert.equal(
+  shouldRebaseCuratorSprintForOnboardingContext({
+    existingStartDate: "2026-07-14",
+    focusDate: "2026-07-15",
+    onboardingContextProvided: true,
+    existingCompatible: false,
+  }),
+  true,
+  "changed onboarding compatibility may replace the existing sprint without resetting its calendar identity",
+);
 assert.notEqual(studentFingerprint, experiencedFingerprint, "ICP changes must change the compatibility fingerprint");
 assert.equal(shouldReconcileCuratorSprint(
   { access: "trial", durationDays: 2, variantId: "student_recent_grad", planFingerprint: studentFingerprint },

src/v1/curator/curator-store.ts

@@ -141,6 +141,20 @@ export function decideCuratorSprintReconciliation(
   };
 }
 
+export function shouldRebaseCuratorSprintForOnboardingContext(input: {
+  existingStartDate?: string;
+  focusDate: string;
+  onboardingContextProvided: boolean;
+  existingCompatible: boolean;
+}) {
+  return Boolean(
+    input.onboardingContextProvided
+      && input.existingStartDate
+      && input.existingStartDate !== input.focusDate
+      && !input.existingCompatible,
+  );
+}
+
 function accessChoiceFromContext(context: Record<string, unknown> | undefined): "trial" | "full" | undefined {
   const preferences = context && context.preferences && typeof context.preferences === "object" && !Array.isArray(context.preferences)
     ? context.preferences as Record<string, unknown>
@@ -751,7 +765,16 @@ async function loadSprintState(
   const existingDuration = latestPayload?.durationDays === 7 ? 7 : latestPayload?.durationDays === 2 ? 2 : undefined;
   const existingAccess = latestPayload?.access === "full" ? "full" : latestPayload?.access === "trial" ? "trial" : undefined;
   const existingFingerprint = typeof latestPayload?.planFingerprint === "string" ? latestPayload.planFingerprint : undefined;
-  const rebaseExistingForCompletion = Boolean(onboardingContextOverride && existingStartDate && existingStartDate !== todayDate);
+  const existingCompatible = Boolean(
+    existingStartDate && existingVersion === CURATOR_PLAN_VERSION && existingVariant
+      && existingDuration === desired.durationDays && existingAccess === desired.access,
+  );
+  const rebaseExistingForCompletion = shouldRebaseCuratorSprintForOnboardingContext({
+    existingStartDate,
+    focusDate: todayDate,
+    onboardingContextProvided: Boolean(onboardingContextOverride),
+    existingCompatible,
+  });
   const reuseDecision = existingStartDate && existingVersion && existingDuration && existingAccess
     ? resolveAgedTrialReuse({
       existing: { startDate: existingStartDate, version: existingVersion, durationDays: existingDuration, access: existingAccess },