IDE changelog

This release adds support for signing in to Kiro IDE with Okta or Microsoft Entra ID credentials.

Enterprise SSO with Okta and Entra ID

Enterprise teams can now connect Okta or Microsoft Entra ID alongside AWS IAM Identity Center, giving organizations flexibility in how they manage user access. Developers sign in to the IDE with their existing corporate credentials. User and group synchronization happens automatically through SCIM provisioning. Configure your IdP once and it works across both Kiro IDE and CLI. Learn more ->

This release brings powerful new ways to customize and extend Kiro's agentic capabilities. Define your own specialized subagents, import portable skill packages from the community, and intercept tool invocations with new hook triggers. Enterprise customers also get new governance controls for web tools.

Custom Subagents

Define your own specialized agents to handle specific tasks in your workflow. Create a markdown file in ~/.kiro/agents (global) or .kiro/agents (workspace) with a system prompt and optional attributes like model selection, tool access, and MCP server integration. Kiro automatically selects the right custom agent based on its description, or you can invoke one explicitly. Learn more ->

Agent Skills

Import and create portable instruction packages following the open Agent Skills standard. Skills bundle instructions, scripts, and templates that Kiro activates on-demand when relevant to your task. Share skills across projects or import them from the community. Learn more ->

Pre and Post Tool Use Hooks

New hook triggers let you intercept agent tool invocations. Pre Tool Use hooks can block certain tools or provide additional context before execution. Post Tool Use hooks enable logging, code formatting, or follow-up instructions after a tool runs. Filter by tool categories (read, write, shell, web) or specific tool names with wildcard support. Learn more ->

Web Tools Governance

Pro-tier customers using IAM Identity Center can now control web tools access for their organization. Administrators can disable web search and web fetch tools from the AWS console under Settings > Shared settings. Learn more ->

Custom Extension Registry

Point Kiro at your organization's private extension registry instead of the default Open VSX marketplace. Configure a limited set of vetted extensions for your team by updating the extensionsGallery settings in product.json. Deploy across your organization using MDM or endpoint management. Learn more ->

This release introduces web tools for searching and fetching content from the internet, enhanced hooks with new action types, subagents for parallel task execution, and improved supervised mode with per-file review capabilities.

Web tools

Kiro can now search the web and fetch content from URLs directly in chat. Use web tools to look up current documentation, find the latest library versions, or research solutions to technical problems. This keeps your development workflow in one place without switching to a browser.

Contextual hooks

Introducing contextual hooks with two new triggers: Prompt Submit and Agent Stop. These hooks fire at key moments in the agent workflow, letting you inject context or run commands before the agent acts. Choose between Agent Prompt actions to instruct the agent with natural language, or Shell Command actions to run commands locally without consuming credits.

Subagents

Introducing subagents for parallel task execution. Kiro can now run multiple tasks simultaneously or delegate to specialized subagents. Two built-in subagents are available: a context gatherer for exploring projects and a general-purpose agent for parallelizing tasks. Each subagent has its own context window, keeping the main agent context clean. Use subagents to investigate multiple data sources in parallel, analyze GitHub issues across repositories, or extend your context window limits without requiring summarization.

Enhanced Supervised Mode

Supervised mode now offers granular control over code changes with per-file review capabilities. When Kiro makes changes to multiple files, you can review each file individually and selectively accept or reject changes. This turn-based approach works in both vibe chat and spec chat sessions, giving you full visibility into each modification.

This release introduces Powers for dynamic MCP tool loading, conversation summarization to manage context windows, and slash commands for quick access to hooks and steering files.

Powers

Introducing Powers, a new way to give Kiro's agent instant expertise for any framework or tool. Powers package MCP servers, steering files, and hooks into reusable bundles that activate on-demand based on your conversation context. Instead of loading all MCP tools upfront and overwhelming your context window, powers load dynamically when you mention relevant keywords. Browse curated powers from launch partners including Datadog, Dynatrace, Figma, Neon, Netlify, Postman, Supabase, Stripe, and more—or create your own.

Summarization

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Adds automatic conversation summarization to manage long conversations. When your conversation reaches 80% of the model's context window limit, Kiro automatically summarizes previous messages to bring context usage back below the limit. A new context usage meter in the chat panel shows what percentage of the model's context is being used.

Slash commands

Introducing slash commands for quick access to hooks and steering files directly from the chat input. Type / to see available commands and execute them instantly. Hooks with manual triggers and steering files configured with manual inclusion appear in the slash command menu, letting you run tests, sync documentation, or pull in specific guidance on demand.

This release adds support for enterprise billing where administrators can onboard large teams to Kiro, provides the capability to revert to the results of a previous conversation through checkpointing, adds support for multi-root workspaces, and introduces property-based testing with Kiro.

Spec correctness with property-based tests

Introduces property-based testing (PBT) to generate evidence for verification of spec requirements. Unlike unit tests, PBTs run hundreds of times with randomly generated inputs to detect edge cases.

Enterprise support

Launches support for enterprise users in Kiro IDE. Profile selection when multiple profiles are configured (auto-select default profile if only one profile exists), new dashboard for enterprise users, in-chat alerts, usage metering and summaries, enterprise governance of telemetry and MCP settings.

Kiro CLI

Introducing the Kiro CLI. Kiro CLI leverages the Auto agent to deliver results in your terminal, and takes you from natural language, to code, to deployment. Kiro CLI supports different agent modes, MCPs, steering files, and custom agents. Install on macOS or Linux:

Multi-root workspace support

With multi-root workspace support, a single Kiro workspace can have multiple roots, e.g., a single workspace that contains both /users/bob/my-project and /shared/utils/auth as top-level folders.

Checkpointing

Support for checkpointing which allows users to revert to the results of a previous conversation in Kiro. This feature enables developers to undo changes made by AI agents and return to a previous state of their workspace, while providing visibility into what changed and guidance on next steps.

Settings for context providers

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Adds experimental settings to control the Codebase (#codebase) allowing users to opt-in to this CPU-intensive indexing feature.

Chat file context line ranges

Adds capabilities to the chat context provider for files to use line ranges in order to focus context to either a single line in a file or line range.

Kiro web dashboard

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Access app.kiro.dev to manage your account, track usage statistics, and modify subscription settings through the web interface.

This release expands MCP capabilities with remote server support and one-click installation, introduces global steering rules and project-specific agent configuration, and refines agent workflows with improved hook execution, command trust, and targeted file context.

Remote MCP Support

Connect to MCP servers hosted anywhere on the internet via Streamable HTTP, accessing cloud services and APIs without local installation.

Global Steering Rules

Define global steering rules that apply across all your workspaces.

AGENTS.md Support

Support for the AGENTS.md standard to define guidelines, coding standards and architectural patterns. Add an AGENTS.md file to the global steering file location (~/.kiro/steering/), or to the root folder of your workspace, and they will get picked up by Kiro automatically.

One-Click MCP Installation

Simplified MCP server setup with automatic installation—get started with MCP tools faster than ever. View servers →

Environment Variable Expansion in MCP

Use environment variables in your MCP server configurations for flexible, environment-specific setups.

Targeted File Context in specs

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Reference specific line ranges when adding files to context (e.g., #[[file:src/utils/helper.ts:10-25]]), giving you precise control over what the agent sees and enabling more focused implementations.

This release introduces dev server support with background processes, spec context provider and MVP task workflows, enhanced MCP controls, and per prompt usage tracking with notifications.

Spec MVP Tasks UX

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Choose your development pace during spec creation. When the agent generates tasks, select "Keep optional tasks (faster MVP)" to mark tests and documentation as optional (✱), or "Make all tasks required" for comprehensive coverage from the start. Optional tasks remain visible throughout the workflow, letting you focus on core features first

Spec Context in Chat

Use #spec in chat to reference your spec files directly. The agent now understands your spec context, providing more accurate responses during development

Dev server support

Long-running commands like npm run dev, build watchers, and test runners now start in the background automatically. The agent detects these processes, returns control to you immediately, and continues tracking them—no more blocked terminals

Per prompt credit consumption insights

You can now see how many credits each prompt consumed, right in the chat panel.

Proactive Usage Notifications

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Get intelligent alerts about your credit usage patterns to help you stay informed and avoid surprises

This release brings spec task management, intelligent code diagnostics, AI-powered commit messages, and refined agent interactions to streamline your development process.

New Features

• Support for Sonnet 4.5 (experimental): You can now send your prompts to Sonnet 4.5 via the chat box. Sonnet 4.5 is also available in Auto, our agent which uses a variety of task-specific foundation models under the hood

• Spec MVP tasks: During spec creation, you can now mark tasks (including unit tests) as optional to prioritize core features while keeping comprehensive task lists

• Diagnostics Tool: Added diagnostics tool to provide agent with syntax, type, and semantic errors, improving agent accuracy and reducing lint errors

• Git Commit Message Generation: Draft commit messages using the agent directly from the source control pane with a single click. Learn more →

• Repetitive Tool Use Detection: Agent now detects repetitive tool usage patterns and prompts users to continue or stop, optimizing credit consumption

• Unified Credits System improvements: Unified credits system with Auto agent capabilities enhancements and bug fixes. This feature provides users a single credit pool and streamlined usage tracking. Learn more →

This release addresses critical security vulnerabilities and bug fixes.

Security Improvements

• V8 Engine Security: Merge Chromium 138.0.7204.251 to address CVE-2025-10585, a zero-day vulnerability addressing type confusion issue in V8 JavaScript and WebAssembly engine.

• Command Execution Security: Fixed vulnerability on PowerShell that could allow malicious commands to execute without user confirmation

Bug Fixes

• License Access: Fixed render issue in License page

This release brings Auto, our new agent, enhanced usage tracking, and editor improvements to elevate your development experience.

New Features

Note: These features are rolling out gradually between now and October 1st, and users will be migrated to a single pool of credits and new limits. Your limits will reset to the new monthly plan limits once migrated.

• Auto: Added Auto to the model options. Auto is an agent that uses a mix of different frontier models such as Sonnet 4 combined with specialized models, and optimization techniques such as intent detection, caching, and more

• Unified Limits: Support for new paid plans with unified limits and fractional credit consumption

• Usage Dashboard: Support to view usage based on single Kiro credit pool

• Usage Meter: Add credit consumption status bar item to allow easier usage tracking

Bug Fixes and Improvements

• Editor Upgrade: Upgraded editor to CodeOSS 1.103.2

• Account Management: Enable Kiro account deletion for BuilderID

• Authentication: Improvements to login reliability and logout flow for better signing experience

• UI Improvements: Hide trust command UI on command cancellation