Sync public snapshot from freebuff-private

Source: CodebuffAI/freebuff-private@a88c66ae1d551cfaf7845dfd8ba53d70e0e2e275

Author: github-actions[bot]

bun.lock

@@ -23,6 +23,11 @@ describe('free-promotion spend windows', () => {
         from: new Date(Date.parse(free.at)).toISOString(),
         to: new Date(Date.parse(back.at)).toISOString(),
       },
+      {
+        modelId: FREEBUFF_SOLAR_PRO_4_MODEL_ID,
+        from: '2026-09-09T15:49:00.000Z',
+        to: '2099-01-01T00:00:00.000Z',
+      },
     ])
   })
 
@@ -34,6 +39,8 @@ describe('free-promotion spend windows', () => {
     // The instant the price goes back to 5, spend counts again — with no
     // deploy, which is the point of deriving this from the schedule.
     expect(isFreePromotionSpendAt(solar, new Date('2026-09-08T00:00:00-07:00'))).toBe(false)
+    expect(isFreePromotionSpendAt(solar, new Date('2026-09-09T15:48:59.999Z'))).toBe(false)
+    expect(isFreePromotionSpendAt(solar, new Date('2026-09-09T15:49:00Z'))).toBe(true)
   })
 
   it('exempts nothing else', () => {

common/src/constants/__tests__/freebuff-free-promotions.test.ts

@@ -5,8 +5,8 @@ export const SOLAR_REGULAR_OFFER = {
   tagline: 'Limited-time trial',
 } as const
 
-// The customer offer is September 5–7, Pacific time. These transitions travel
-// with the server quote so idle clients can update even during a slow refresh.
+// These transitions travel with the server quote so idle clients can update
+// even during a slow refresh. Preserve past prices for historical accounting.
 export const SOLAR_PRICE_CHANGES = [
   {
     at: '2026-09-05T00:00:00-07:00',
@@ -19,6 +19,12 @@ export const SOLAR_PRICE_CHANGES = [
     modelId: FREEBUFF_SOLAR_PRO_4_MODEL_ID,
     ...SOLAR_REGULAR_OFFER,
   },
+  {
+    at: '2026-09-09T15:49:00Z',
+    modelId: FREEBUFF_SOLAR_PRO_4_MODEL_ID,
+    price: 0,
+    tagline: '0 Freebucks',
+  },
 ] as const
 
 export function solarOfferAt(now: number = Date.now()) {

common/src/constants/freebuff-solar-promo.ts

@@ -13,14 +13,15 @@ import {
 const solar = 'upstage/solar-pro4'
 const start = Date.parse('2026-09-05T07:00:00Z')
 const end = Date.parse('2026-09-08T07:00:00Z')
+const restored = Date.parse('2026-09-09T15:49:00Z')
 const quoteBeforeStart = () => ({
   ...freebucksFixture(0, { [solar]: SOLAR_REGULAR_OFFER.price }),
   priceNotices: { [solar]: SOLAR_REGULAR_OFFER.tagline },
   priceChanges: [...SOLAR_PRICE_CHANGES],
 })
 
 describe('announced Freebucks price changes', () => {
-  it('keeps a serialized quote coherent at both boundaries without mutating balances or the input', () => {
+  it('keeps a serialized quote coherent at every boundary without mutating balances or the input', () => {
     const quote = JSON.parse(JSON.stringify(quoteBeforeStart()))
     expect(applyFreebucksPriceChanges(quote, start - 1)).toBe(quote)
     const free = applyFreebucksPriceChanges(quote, start)
@@ -33,15 +34,20 @@ describe('announced Freebucks price changes', () => {
     expect(expired.balance).toBe(0)
     expect(expired.daily).toEqual(quote.daily)
     expect(expired.wallet).toEqual(quote.wallet)
-    expect(nextFreebucksPriceChange(expired)).toBe(Infinity)
+    expect(nextFreebucksPriceChange(expired)).toBe(restored)
+    const freeAgain = applyFreebucksPriceChanges(expired, restored)
+    expect(freeAgain.prices[solar]).toBe(0)
+    expect(freeAgain.priceNotices[solar]).toBe('0 Freebucks')
+    expect(nextFreebucksPriceChange(freeAgain)).toBe(Infinity)
     expect(quote.prices[solar]).toBe(5)
-    expect(quote.priceChanges).toHaveLength(2)
+    expect(quote.priceChanges).toHaveLength(3)
   })
 
-  it('catches up across both transitions, even when a delayed response lists them out of order', () => {
+  it('catches up across all transitions, even when a delayed response lists them out of order', () => {
     const quote = quoteBeforeStart()
     quote.priceChanges.reverse()
     expect(applyFreebucksPriceChanges(quote, end).prices[solar]).toBe(5)
+    expect(applyFreebucksPriceChanges(quote, restored).prices[solar]).toBe(0)
   })
 
   it('does not add an unpriced model or invent metadata on older server responses', () => {