The Sandbox Brief

A weekly read on the sandbox world

Every Friday, what actually moved across AI, enterprise and regulatory sandboxes, with a take on why it matters and the links worth your time. Written by Eve Harper. Neutral on vendors, and every number is sourced.

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The EU AI Act's sandbox deadline arrives

August 2 was the statutory date for every EU member state to have an AI regulatory sandbox operational. The reality on the ground is uneven.

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A developer-platform week: Twilio and Shopify

Twilio ships US Branded Calling GA and WhatsApp tooling; Shopify updates the Hydrogen developer preview.

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Cloudflare's Sandbox SDK hits a 1.0 preview, and Devin moves in

Cloudflare ships a Sandbox SDK 1.0 preview and runs Cognition Devin on its Containers; Modal ships 1.5.3.

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The FCA's AI sandbox opens its second cohort, with GPUs and Claude

The UK regulator launches cohort 2 of its Supercharged Sandbox: 199 applications, 21 firms, GPU infrastructure, and access to Claude.

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Modal tightens the SDK, Plaid keeps iterating

Modal 1.5.2 adds workspace APIs and a blocking volume reload; Plaid extends Identity Verification, Investments and Transactions.

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Plaid rebuilds its mobile SDKs from the ground up

Plaid ships a Kotlin Android SDK and an Expo-based React Native SDK, and the Android footprint drops about 74%.

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A quiet week, and what 'quiet' tells you

No day-precise sandbox news landed this week, so a short, honest note on reading the gaps between announcements.

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AWS makes AgentCore Harness GA, and Daytona closes its source

Big cloud and scrappy startup moved in opposite directions: AWS shipped a managed microVM agent runtime, Daytona took its code closed.

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The Sandbox Brief

What moved in the sandbox world, every Friday.

Pricing changes, new entrants, benchmark refreshes and one sharp take from Eve Harper. Read by engineers choosing where their agents and apps run. No fluff. Read the archive.

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