Kiro: Automatic V2 agent upgrades on by default at V3 session start

What changed

5 points

1. 1

   This release turns on automatic V2 agent upgrades by default, and the upgrades apply when a V3 session starts.

   Official wording · c1

   This release turns on automatic V2 agent upgrades by default when a V3 session starts

2. 2

   ACP clients that declare terminal authentication can sign in to Kiro from a terminal in this release. A capable client opens a terminal sign-in flow.

   Official wording · c2 c4

   lets ACP clients that declare terminal authentication sign in to Kiro from a terminal

   a capable client opens a terminal sign-in flow

3. 3

   Custom agents built for V2 keep working on V3, and no manual upgrade run is needed.

   Official wording · c3

   Custom agents built for V2 keep working on V3 without a manual upgrade run

4. 4

   The release also draws Mermaid node shapes and nested subgraphs. This release adds a KIRORUNTIMEDIR override for the bundled runtime. This release also tidies the V3 approval prompts.

   Official wording · c5 c6 c7

   It also draws Mermaid node shapes and nested subgraphs

   adds a KIRORUNTIMEDIR override for the bundled runtime

   tidies V3 approval prompts

5. 5

   Fixes in this release cover fullscreen scrolling, click targeting in fullscreen, and the Homebrew upgrade hint.

   Official wording · c8

   Fixes cover fullscreen scrolling, click targeting in fullscreen, and the Homebrew upgrade hint.

Change details

Fields in this table are taken verbatim from the official text.

Version timeline

Published updates for this tool on this site, newest official date first.

1. 2026-10-30CurrentAutomatic V2 agent upgrades on by default at V3 session start
2. 2026-10-21Four models generally available with full Kiro support

About this tool

Kiro

Kiro is an agentic coding tool focused on spec-driven development, turning requirements into designs and tasks before implementation and checks.

CategoriesAI Coding

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