Kiro

Models: Kimi K3 now available in Kiro

IDE: Markdown Review, What's New Announcements, and Workflow Step Notifications

This release brings Markdown Review to every Kiro IDE user, so you can comment on Markdown files in your workspace and send the comments to Kiro in one batch. It also adds a What's new announcement br…

Models: Claude Sonnet 4 reaches end of life

Claude Sonnet 4 has reached end of life in Kiro as of October 14, 2026. If your work depends on it, choose another available model before continuing. Claude Sonnet 5.5 is the latest Sonnet model. See…

CLI: Mermaid Diagram in Chat

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IDE: Local Command Sandbox, Start Saved Workflows from Chat, and Live Tab Status: Limit what agent-run shell commands can reach, start saved Workflows from chat, and see live session status on editor tabs.

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CLI: Local Command Sandbox and Local Autonomous Mode: Use the local command sandbox and autonomous mode in V3, load MCP tools on demand, and keep V3 configuration under KIRO_HOME.

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Web: Model Fallback, Workflow Step Models, and Session Reopen Previews

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CLI: Switch to V3 at Chat Start and Model Fallback Notices

This release shows a startup prompt inviting you to switch to V3 as part of a gradual rollout. It also adds V3 model fallback notices, keeps more of your V2 agent access when you upgrade agents to V3,…

General: Kiro is now in scope for FedRAMP Class C

Kiro is now in scope for FedRAMP Class C in the US East (N. Virginia) Region. US government agencies, contractors, and other organizations whose workloads are subject to FedRAMP Class C requirements c…

Models: Claude Opus 5.5 now available in AWS GovCloud (US): Claude Opus 5.5 is available in the Kiro IDE and CLI across both AWS GovCloud (US) Regions.

Models: Claude Sonnet 5.5 now available in AWS GovCloud (US): Claude Sonnet 5.5 is available in the Kiro IDE and CLI across both AWS GovCloud (US) Regions.

CLI: Memory Across Chat Sessions: In local V3 sessions, Kiro can learn useful context from your work and recall it in later chat sessions, with controls for memory access and automatic updates.

Kiro CLI 2.29.0 introduces Memory for local V3 sessions, so Kiro can carry useful context from your work, such as a repository's commands and conventions, into later chat sessions instead of asking yo…

IDE: Workflow Feedback, Power Search, and Flexible Hook Matching

This release adds a feedback link for Workflows, fixes several chat, terminal, and source control issues, and improves workflow reliability, spec-only commands, and Hook matching.

IDE 1.2.56: Workflows, Safer Untrusted Workspaces, and Enterprise Sign-In Controls

Workflow Feedback, Power Search, and Flexible Hook Matching. Learn more ->

CLI: Switch to 3.0 from Classic, Category-Based Hook Matching, and Steadier V3 Sessions: Switch an interactive Classic session to 3.0, match V3 Hooks by tool category, and improve reliability in long V3 sessions.

Kiro CLI 2.28.0 offers Classic users a path to switch to 3.0 without leaving their terminal, lets V3 Hooks match tool categories, and makes long V3 chats more reliable.

IDE 1.2.37: Workflows, Safer Untrusted Workspaces, and Enterprise Sign-In Controls

IDE 1.2.37 tightens local-state access on macOS and Linux, preserves completed work during interruptions, and combines model search with effort controls.

Models: Claude Sonnet 5.5 Now Available

Claude Sonnet 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). It's Anthrop…

CLI: Workflow Delegation, Live Steering Context, and Saved Prompt Commands: Choose how V3 delegates with Workflows, include live file and folder context in Steering, and invoke saved prompts as slash commands.

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Web: Introducing Workflows in Kiro Web: Run reusable, multi-step agent plans in Kiro Web cloud sessions, inspect and guide every step, and keep working in the parent conversation.

Workflows are now available as an opt-in feature in Kiro Web cloud sessions. They run reusable, multi-step agent plans in the background while you continue working in the parent conversation.

CLI: 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.

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IDE: Workflows, Safer Untrusted Workspaces, and Enterprise Sign-In Controls: Run reusable multi-agent Workflows in the background, apply stronger safeguards to Kiro configuration, and manage enterprise sign-in options.

IDE 1.2 introduces Workflows, strengthens safeguards for untrusted workspaces, and adds enterprise controls for sign-in methods. This release also reworks session details, keeps enterprise traffic in…

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 repo…

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, ses…

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…

Crew: Live Settings, Durable Work, and Broader Pull Request Watches

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IDE 1.1.70: Agent Artifacts and Native ARM64 Builds

Configurable Terminal Timeouts, Clickable File Links, and Agent Focus Session Restore. Learn more ->

CLI: Session-Wide Tool Approval, Session Dashboard Controls, and Environment Isolation: Use session-wide tool approval in V3, combine session dashboard filters, and control which environment variables your chats and tools inherit.

This release adds session-wide tool approval to V3 and makes /sessions controls easier to discover and combine. Project .env files no longer load automatically into chat sessions, MCP servers, or tool…

Web: Reasoning Effort and a Grouped Timeline

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CLI: Reasoning Controls and Cloud Sessions: Configure thinking and effort from /model and start V3 cloud sessions before connecting a repository.

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Models: Claude Fable 5.1 Preview Begins Rolling Out to Kiro Enterprise

Claude Fable 5.1 is beginning to roll out in Preview across Kiro clients for Kiro Enterprise organizations. Anthropic's most capable agentic coding model traces problems to root causes, maintains cont…

CLI: Fullscreen Chat and Streamlined Sessions: Expand chat to a dedicated terminal screen, browse a streamlined V3 session dashboard, and keep long sessions running reliably.

This release adds fullscreen chat for interactive TUI and Lite sessions, streamlines the V3 session dashboard, and improves reliability during long-running work.

Models: GPT-5.6 Sol, Terra, and Luna upgraded to 1M context window

GPT-5.6 Sol, Terra, and Luna now support a 1M token context window, up from 272K, in the Kiro IDE, CLI, and Web. Entire codebases, long-form documents, and extended multi-turn agent histories fit in a…

IDE: Agent Artifacts and Native ARM64 Builds

IDE 1.1 lets agents produce durable artifacts you can review and return to, adds native ARM64 builds for Windows and Linux, and updates the editor foundation to Code OSS 1.131. Compacted conversations…

CLI 2.21.4: Session Dashboard, Configuration Panel, and Cloud Sync

Session Search Scope, V2 Harness Flag, and Unified Settings Keyboard. Learn more ->

CLI: Session Search Scope, V2 Harness Flag, and Unified Settings Keyboard: Choose whether session search covers agent responses, run a single session on the V2 harness, and move through every settings menu with the same keys.

This version lets you choose what session search covers, adds a flag that selects the V2 agent harness for a single run, and gives every settings menu the same keyboard behavior.

Crew: Remote Crews, Agent Harnesses, and Apps Launchpad

Kiro Crew 0.6.0 lets you choose the harness behind a session, start work on a connected remote crew, and let crew members dispatch workers of their own. Chat is quieter and easier to resume, long-runn…

Web: Kiro Web Is Now Generally Available

Build, delegate, and steer development work with Kiro Web from your browser. Explore ideas collaboratively, shape work with Specs, or hand off a task end to end. Learn more ->

Web: Use Cloud Configuration in Local Sessions

Configuration Sync can now carry your cloud configuration into new local Kiro IDE and CLI sessions. On the Configuration Sync page, enable Apply your cloud configuration to local sessions to load your…

IDE 1.0.437: Agent Focus, Permissions, Custom Agents, and More

Cloud Configuration, Synced Powers, and Agent Focus Reliability. Learn more ->

General: Export Kiro usage metrics to OpenTelemetry

Account administrators can now send per-user Kiro usage metrics to their OpenTelemetry-compatible observability platform. Monitor adoption, engagement, and credit consumption by user and model without…

General: Kiro adds ISO/IEC 27001:2022 coverage

Kiro is included in the defined scope of AWS's ISO/IEC 27001:2022 certification. This gives security, procurement, and vendor-risk teams independently verified evidence they can use when evaluating Ki…

IDE: Cloud Configuration, Synced Powers, and Agent Focus Reliability

With Cloud configuration enabled, your supported personal configuration appears across the IDE and Agent Focus, and cloud-synced Powers are ready to try from the installed list. This version also keep…

CLI: Session Dashboard, Configuration Panel, and Cloud Sync: Browse and manage local and cloud sessions, inspect configured resources, and apply cloud configuration to new local V3 sessions.

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Web: Pick a Branch When You Pick a Repository

You no longer have to start from the default branch. When you select a GitHub or GitLab repository for a session, choose the branch to work from right in the selector. The agent clones that branch and…

Crew: AWS Control, Session Tabs, and Agent Coordination

This version gives your AWS account a control room, lets administrators publish one security policy across a fleet, and makes parallel work easier to manage with persistent session tabs. Local dictati…

IDE: Third-Party Extension Compatibility and More Reliable MCP Sign-In

This version lets third-party extensions work alongside Kiro, adds support for the latest MCP protocol revision with more reliable sign-in, reduces extension host crashes during large agent responses,…

Web: Sessions Name Themselves

New sessions now get a descriptive, agent-generated title based on what you're working on, replacing the generic default. The title appears in the session header and sidebar as soon as it's ready. Ren…

IDE 1.0.395: Agent Focus, Permissions, Custom Agents, and More

Third-Party Extension Compatibility and More Reliable MCP Sign-In. Learn more ->

CLI: Full-Screen Spec Task Execution and Preserve Scrollback

This release gives V3 spec runs a full-screen task execution view with real-time progress and task scope selection. The new Preserve scrollback toggle keeps terminal history available through overflow…

Crew: First-Class Windows and Linux, a Secrets Vault, and a Code-Editing Dashboard

This version makes Windows and Linux first-class installs, moves your secrets out of the config file and into an encrypted vault, and turns the dashboard into a place to edit code, not just discuss it…

Web: Organize Sessions into Groups

Keep a growing session list manageable by grouping related sessions. Create a group in the sidebar or on the sessions page, move sessions in and out, and rename or dissolve a group at any time.

CLI: Spec Review Mouse Support and Automatic Stream Recovery

This release brings mouse support to the spec review screen. Under the hood, a stream idle watchdog, automatic retries with backoff, and a 60-minute streaming timeout mean a dropped connection or a th…

Web: Recent Repositories in the Repository Selector

The repository selector now shows a Recent section at the top once you've used a couple of repositories, so getting back to one you were just working in takes a click instead of scrolling the full lis…

IDE: Permission Improvements and Configured Windows Shells

This version keeps ignored files out of search results, improves filesystem and command permission rules, and runs agent commands in your configured terminal profile on Windows.

IDE 1.0.337: Agent Focus, Permissions, Custom Agents, and More

Permission Improvements and Configured Windows Shells. Learn more ->

Crew: Crew Mode, a Built-in Agent Browser, and Wider Platform Support

This version lets the agent run several threads of your work at once, drives a real browser inside the dashboard, and broadens the desktop lineup with a native Linux ARM64 build and first-class Window…

Web: Access Kiro Web with Okta or Microsoft Entra ID

Your team can now access Kiro Web through the Okta or Microsoft Entra ID integration you already use. After an administrator configures access, users only need to sign in. This capability is available…

IDE 1.0.309: Agent Focus, Permissions, Custom Agents, and More

Nested AGENTS.md and Long-Session Efficiency. Learn more ->

IDE: Nested AGENTS.md and Long-Session Efficiency

Add AGENTS.md files throughout your workspace to give Kiro instructions scoped to each directory tree. This version also lowers idle resource use, preserves more context in long sessions, and improves…

CLI: Voice Mode, Opt-In Cloud Sessions, and Spec Review

This release lets you talk to Kiro instead of typing: /voice dictates your prompts with on-device transcription. Spec runs gain a review screen for reading phase documents and staging line comments, a…

CLI: Cloud Sessions Preview and Smarter Command Menus

This release introduces cloud sessions in preview: run your session in a managed cloud sandbox with --cloud, disconnect while the agent keeps working, and resume from any machine. The slash command me…

IDE: Cloud Sessions and Agent Focus Mode Upgrades

This version brings Cloud Sessions to Agent Focus Mode as a preview and gives the sessions rail a collapsible icon-only view, attention cards you can answer in place, and back/forward navigation. It a…

IDE 1.0.293: Agent Focus, Permissions, Custom Agents, and More

Cloud Sessions and Agent Focus Mode Upgrades. Learn more ->

IDE: Agent Plugin Support and Session Pinning

This version supports Powers packaged in the open Agent Plugin format and reworks the Agent Focus Mode session rail with pinning, Kiro CLI hand-off, and in-app updates. It also moves Kiro to Code OSS…

IDE 1.0.288: Agent Focus, Permissions, Custom Agents, and More

Agent Plugin Support and Session Pinning. Learn more ->