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TENSORLAKE·ENGINEERING LOG / VOL. 04·EST. 2024

Engineering log.

Dispatches from the Tensorlake runtime team — how we build the sandbox layer under five million agent workloads, the research that shapes it, and what we shipped this week.

EDITIONQ4 · 2026
POSTS50
AUTHORS18
EngineeringOct 14, 2026·6 min read·◆ FEATURED

A sandbox that holds a whole environment

Tensorlake is now a built-in sandbox provider in Scale AI’s AgentEnv Framework.

SW
Shanshan WangApplied AI · Tensorlake
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23 POSTS · UPDATED DAILY
Oct 14, 2026Engineering

A sandbox that holds a whole environmentTensorlake is now a built-in sandbox provider in Scale AI’s AgentEnv Framework.

Shanshan WangApplied AI · Tensorlake6 minSep 16, 2026Engineering

Run multi-container agent evals on Tensorlake with HarborHarbor 0.23.0 can run Docker Compose tasks on Tensorlake. Each task boots as one MicroVM with a Docker daemon inside, so an agent’s MCP server, database, browser, or game server runs next to it as its own container.

Shanshan WangApplied AI · Tensorlake7 minAug 29, 2026Engineering

Dynamic Firewall Policies for Sandboxes.Every Tensorlake sandbox that carries a network policy sits behind an egress firewall on the host. A walk through the enforcement path, plus two recent improvements: live policy updates and per-connection hostname checks.

Salvador GironèsSoftware Engineer · Tensorlake12 minAug 26, 2026Engineering

Strengthening agent evaluation environments.Tensorlake Sandboxes now support dynamic network policies in Harbor: public, allowlist, or no-network per trial phase, switched on a running sandbox without a restart.

Shanshan WangApplied AI · Tensorlake4 minJul 30, 2026Engineering

Build Your Own CI infrastructureYou get a GitHub runner, and you get a GitHub runner...

David CalaveraSoftware Engineer · Tensorlake5 minJul 28, 2026Product

Introducing Tensorlake BYOC: Serverless Sandboxes in Your Private CloudRun Tensorlake Sandboxes on compute you own across AWS, GCP, Azure, CoreWeave, Nebius, and bare metal. Same APIs, images, and SDKs as Tensorlake Cloud, with compute, storage, and workload traffic inside your own network.

Diptanu Gon ChoudhuryCEO / Co-founder5 minJul 22, 2026Engineering

Run Devin Outposts on Tensorlake Sandboxes.Cognition keeps the agent loop; execution runs inside a Tensorlake sandbox you control. We built the integration, and you can clone and run it today.

Shanshan WangApplied AI · Tensorlake7 minJul 13, 2026Engineering

Firecracker disk snapshots in O(changed bytes), not O(disk size)We added copy-on-write image layering inside Firecracker's block device, and the disk got faster, not slower. Snapshots pause the VM for tens of milliseconds and cost only what changed, so a running Postgres barely notices them, at any disk size.

Diptanu Gon ChoudhuryCEO / Co-founder10 minJul 9, 2026Engineering

Zero-copy TLS ingress with kTLS and splice(2) for sandboxes

Diptanu Gon ChoudhuryCEO & Co-founder8 minJun 24, 2026Engineering

Accelerating Harbor with Tensorlake.Tensorlake runs the real task Docker images for Harbor on microVM sandboxes. On Terminal-Bench 2.1 the oracle passes all 89 tasks in 36m 44s — every image published, cold starts in seconds.

Shanshan WangApplied AI · Tensorlake6 min
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