Kiro 2.26.1

2.26.1 Sep 30, 2026 Workflows, Classic Migration Guidance, and V3 Approval Safeguards Run reusable, multi-step Workflows in V3, get clear guidance when Classic sessions start, and use stricter approval checks for files, tools, and shells. Kiro CLI 2.26.0 adds opt-in Workflows for reusable, multi-step tasks and helps Classic users identify what to change before moving to the terminal UI. V3 also tightens approval checks for Hook and Language Server Protocol (LSP) file writes, for MCP tools and shell commands in untrusted workspaces, and for approvals that change while an action waits. Run multi-step Workflows In a V3 session, open /settings , choose Features , and enable Workflows , then restart Kiro CLI to apply the change. Then ask Kiro to create a Workflow from the outcome you want, or launch a recipe with /workflow run , and use the /workflow commands to inspect and manage runs. Learn more -> Move from Classic to the terminal UI Classic sessions now show a deprecation notice. If a flag, environment variable, or saved setting launched Classic, the notice identifies it and points to guidance for switching to the terminal UI. Learn more -> Improvements Fixes Patches Sep 28, 2026 Models Claude Opus 5.5 Now Available Claude Opus 5.5 brings stronger agentic coding and clearer communication than Opus 5 at a 2.0x credit multiplier, down from Opus 5's 2.2x. Claude Opus 5.5 is now available with experimental support across the Kiro IDE, CLI, Crew, and Web for Pro, Pro+, Pro Max, and Power customers in us-east-1 (IAD) and eu-central-1 (FRA). Anthropic reports stronger performance on long, complex coding tasks and clearer communication than prior models. Claude Opus 5.5 includes a 1M-token context window and has a 2.0x credit multiplier . To load the latest model list, restart the IDE or CLI, run kirocrew restart for Crew, or refresh Web in your browser. Learn more -> Sep 28, 2026 2.25.0 CLI Power Management, V3 Output Styles, and Fullscreen Scroll Speed Install and uninstall Powers from chat or the command line, choose V3 output styles, tune fullscreen scrolling, and automate session teardown with a new Hook. This release lets you manage Powers from a local V3 session or without starting chat, customize how V3 responds, and tune fullscreen scrolling. V3 also adds a SessionEnd Hook, while model notices, session loading, terminal rendering, authentication, and security receive reliability updates. Install and uninstall Powers In a local V3 session, run /powers install <name|path> to add a Power from the catalog or a local directory, and /powers uninstall <name> to remove one. Kiro refreshes the available Powers immediately so the current session can use the updated set. To manage Powers without starting chat, run kiro-cli powers install <name|path> or kiro-cli powers uninstall <name> . Learn more -> Choose a V3 output style Open /settings in a V3 session to choose how Kiro formats its responses. The available choices include output styles supplied by upgraded agents, so each agent can offer styles suited to its work. Learn more -> Tune fullscreen scrolling Open /settings display , select Full Screen , and set Scroll speed to move the transcript by 1, 2, or 3 rows per mouse-wheel event. The default is 2 rows. The new Full Screen screen also contains the existing Start fullscreen setting. Learn more -> Run a Hook when a V3 session ends Use the new SessionEnd trigger to run a Hook when a V3 session shuts down. This gives your session-level automation a reliable teardown event for cleanup and other end-of-session tasks. Learn more -> Improvements Fixes Sep 24, 2026 1.1.70 IDE Configurable Terminal Timeouts, Clickable File Links, and Agent Focus Session Restore IDE 1.1.70 lets you set a default timeout for local agent commands, opens Markdown links to workspace files in the editor, and keeps Agent Focus file and folder context aligned with the active project. Restored Agent Focus sessions now