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Found it. The 401s come from a race in the session refresh: two tabs call refreshSession() at once, and the second one writes a stale cookie over the fresh one.

Read 3 files

Edited lib/auth/session.ts

I put a single-flight lock around the refresh, so only one request rotates the token, and the cookie is written with SameSite=Lax after the swap completes.

Ran 2 commands

Auth is green. Moving on to cursor pagination for /api/orders.

Edited api/orders/route.ts

const page = await db.orders.findMany({
  where: { userId, id: { lt: cursor } },
  orderBy: { id: 'desc' },
  take: limit + 1,
});

4m 50s · 11.9k tokens · Running tools…

Type / for commands

+Auto ▾Opus 5.5Medium

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zsh · ~/work/api

$ npx vachi-claude

✓ Vachi is on for Claude Code

$ claude

✳ Claude Code

> refactor the checkout handler

● Read src/checkout.ts (214 lines)

● Grep "handleCheckout" (3 files)

● Edit src/checkout.ts

● Bash npm test (42 passed)

vachi

Session Usage Savings83% saved · est. value in API credits $1081.09

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Session Usage Savings83% saved · est. value in API credits $1081.09

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Session Usage Savings83% saved · est. value in API credits $1081.09

Ask Claude

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checkout.ts · api-gateway

checkout.ts

✳ Claude Code

vachi

Session Usage Savings83% saved · est. value in API credits $1081.09

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your weekly review · jul 6 – jul 12

Your biggest week this month

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Auth tests migrated to the new runner

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From the founder

How my love of building
for my son led to Vachi.

Claude Code has empowered me to take on ambitious projects I would have never started otherwise. One of the crazier ones was upgrading an old toy robot, Cozmo, into a smart play companion for my five-year-old.

Like most parents, I could only work after bedtime. But too many of those nights began with me waiting out the five-hour reset.

I could have upgraded to the 20x plan. But a decade at Google and Netflix trained me to see constraints as systems problems. So I started analyzing Claude Code requests and experimenting with ways to get more useful work from my subscription.

Before I knew it, an attempt to reclaim an hour had turned into something bigger.

The name Vachi blends my son’s name with my dog’s. This is close to my heart.

I hope Vachi also gives you an hour back.

Achal · dad · founder, vachi

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Cozmo, the toy robot I upgraded into a play companion for my son — Cozmo · the project that started Vachi

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Get 2X usagefrom your Claude plan

Context lifecycleSmart cachingModel routing

We paginate stale context

Extended caching windows

Turn-level model routing

Zero data retention,nothing hits disk

For the builders

Works on Claude Code in your

Terminal

Desktop App

VS Code

You getmore usage,usage insights,and a weekly review.

More work per window

Analyze your usage patterns

Your week, written up

Start free,one line install

Get more donewith Fable.

Keep yourflow state.

Freedom fromlimit tracking.

How my love of buildingfor my son led to Vachi.

Be Unstoppable.

Zero data retention,
nothing hits disk

You get

Get more done
with Fable.

Keep your
flow state.

Freedom from
limit tracking.

How my love of building
for my son led to Vachi.