# Cloud agents start 3x faster with builds

Source: [Cursor](https://cursor.com/blog/builds)  
Feed7 permalink: https://feed7.dev/p/cloud-agents-start-3x-faster-with-builds-fec4301fea  
Published: 2026-08-13T00:00:00.000Z  
Trust: Official Source (official_source)

## Why Included

Prebuild deterministic dependencies, start session-fresh services separately, and trace each run to its build and commit SHA.

## Source Summary

Cursor Cloud Agents can start from continuously prepared environment snapshots instead of reinstalling each session. Internal time to first token improved 3x, with failed builds falling back to the last good state.

## Practical Implication

Builders should move deterministic setup into the install command, keep session-fresh services in the start command, and use team or environment secrets for private registries. Agent runs can be traced to exact builds and commit SHAs.

## Agent-Ready Context

Cursor’s new **builds** continuously prepare cloud-agent environments with repositories, dependencies, and install scripts already completed. Internally, environments booted **10x faster** and time to first token improved **3x**.

Builders should move deterministic setup into the install command, keep session-fresh services in the start command, and use team or environment secrets for private registries. Agent runs can be traced to exact builds and commit SHAs.

The gains are Cursor’s internal measurements, and user results will depend on repository setup. Builds run hourly by default; failed builds are rejected, leaving agents on the last working snapshot, which may be older than the default branch.

## Context Map

- Layer: infra
- Domains: coding
- Topics: cloud-agents, sandboxing, observability

## Uncertainty

- None recorded.

## Agent Instruction

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