Cursor Builds prepares reproducible environments for cloud agents, reducing cold start and preserving a last-known-good build path.
New Runtime reading: A coding-agent harness is acquiring release-engineering semantics. Environment versions, build logs, rollback, and inspectability matter because a fast agent is only useful when its execution context can be reproduced.
Evidence boundary: this item uses the listed public sources and keeps vendor, author, or reporter claims attributed. The queued page is an editorial synthesis, not an independent validation of every reported metric.