Stacks/Coding agent

Cognition Devin cloud agents

Cognition's post on building Devin's cloud agents is a case against 'just containerize a CLI agent.' Sessions run in dedicated microVMs; full VM state is snapshotted so work can pause for hours or days and resume; and orchestration, governance, and integrations each get a dedicated team. The company argues that persistence across CI and code review is what makes unattended engineering work possible.

Use case

Cloud software-engineering agents that work unattended across the async gaps of real development — opening a PR, waiting on CI, responding to review, and pushing follow-up commits

Category

Coding agent

Team size

not stated

Orchestrator / framework

A custom orchestration layer that the authors say took over three quarters of dedicated engineering and can manage thousands of concurrent VMs, including provisioning, demand prediction, crash recovery, and teardown. Each agent session runs on a dedicated microVM with its own kernel and isolated storage, networking, and compute — work they say took more than a year of hypervisor engineering.

Memory

Full machine state is snapshotted at the hypervisor level — memory, process trees, and filesystem — so compute can shut down while the agent is idle and the session can resume exactly where it left off when a CI result or review comment arrives.

Evals

The post does not describe a formal eval harness. It does report customer outcomes at Itaú (nearly 17,000 engineers, eleven months in): migrations 5 to 6x faster, auto-remediation of 70% of static-analysis security vulnerabilities, and 2x test coverage.

Observability

The authors describe a tamper-evident audit trail, identity chaining, and access scoping as required governance, and say they staff a dedicated team for each of orchestration, governance, and integrations.

Monthly cost

not stated

Models

not stated

Observability tools

not stated

Other tools

Dedicated microVMsFull browser and desktop applications inside the VM

Source

https://cognition.com/blog/what-we-learned-building-cloud-agents

The Cognition Team · Apr 22, 2026