AWS's Mind-Blowing New AI Agent 'Kiro' Can Code Autonomously for Days
Source: Dev.to
Overview
At AWS re:Invent 2025 (Nov 30 – Dec 5, Las Vegas), Amazon Web Services introduced a new class of “frontier agents” that can operate autonomously for hours or even days. The flagship of this lineup is Kiro, an autonomous virtual developer designed to tackle software‑development tasks with minimal human oversight.
Key Features
- Team‑style learning – Kiro scans existing codebases, tooling (e.g., Datadog, Figma) and workflows to infer a team’s coding conventions and standards.
- Spec‑driven development – The agent generates code while prompting humans for confirmation or corrections on assumptions, gradually building detailed specifications.
- Persistent context – Unlike many AI assistants that lose state after a session, Kiro retains memory across days, enabling it to continue multi‑day projects without repeated input.
- End‑to‑end execution – Kiro can identify a complex issue spanning multiple systems, devise a solution, write the necessary code, and iterate on the implementation autonomously.
Real‑World Impact
When assigned a multifaceted fix, Kiro can independently determine the required changes, produce the code, and refine it through self‑guided testing cycles. This capability promises to accelerate development timelines and reduce the need for constant human supervision on long‑running tasks.
Early Adoption
Early users such as the Commonwealth Bank of Australia and SmugMug have reported significant productivity gains. AWS states that Kiro’s performance improves over time as it deepens its understanding of a team’s codebase and processes, effectively acting as an extension of the development team.