Changelog

This release improves agent reliability when creating and overwriting long files. We fixed a bug that prevented the agent from recovering from failures, improving overall stability.

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 →

User Experience Improvements

• Long Running Commands: Enhanced executeBash tool to detect and avoid commands like dev servers, test runners, interactive commands etc.

• Usage Meter: Usage meter now properly refreshes when switching between accounts within the same session

• Credit Usage Persistence: Improved credit usage tracking across account switches and session management

• Context Popup Positioning: Improved positioning of the context popup triggered by # in chat - now consistently appears at the top-left of the input container

• Theme Compatibility: Enhanced visibility of the overage toggle and improved account dashboard access in Light High Contrast, Kiro Light, Light+, and Quiet Light themes

Bug Fixes and Improvements

• Remote Workspace Reliability: Fixed issues with extension loading in untrusted workspaces when connecting to remote hosts

• Updated Model Selection Setting: Introduced new kiroAgent.modelSelection setting, replacing the deprecated kiroAgent.agentModelSelection for model management

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

This release includes editor performance improvements, enhanced reliability, and bug fixes to enhance your development experience.

Performance & Reliability

• Code OSS v1.100.3 Upgrade: Updated to Code OSS v1.100.3 that adds improved stability and performance improvements

• Faster Response Times: Optimized request handling makes interactions more efficient and improves performance

• Improved Session Management: Enhanced backend processing reduces interruptions and allows for longer continuous work sessions

Enhanced User Experience

• Enhanced Tool Call Recovery: When tool invocations result in repeated failures, Kiro now prompts for your intervention instead of continuing indefinitely, protecting your usage limits and preventing loops

• Enhanced Security Patterns: Expanded detection of dangerous shell commands with improved pattern recognition. Risky commands require manual review unless you explicitly trust them. Learn more about security patterns →

• Model Update: Removed Claude Sonnet 3.7 from the model selector and set Claude Sonnet 4 as the default for all users. Sonnet 4 delivers improved performance and capabilities across all interactions.

Bug Fixes

• Git Repository Initialization: Fixed issue that prevented Git setup for new projects without existing repositories

• Model Selection Persistence: Fixed chat model selection not being saved when restarting Kiro IDE

This release brings key improvements to accessibility, account management, and overall platform reliability.

🎟️ Waitlist Code Support

Kiro is now accessible to more developers through waitlist codes. If you have an waitlist code, you can register and start building with AI-powered development workflows alongside our growing community.

💳 Paid Plans Now Available

Paid plans are now live, giving you access to higher usage limits. Choose the plan that fits your development needs and scale your AI-powered workflows.

📊 Usage Tracking & Billing Dashboard

Introducing comprehensive usage tracking to help you monitor your Kiro consumption. The new billing dashboard displays real-time spec and vibe request usage, plan management options, and overage controls for paid plans.

Additional Improvements

Security & Trust

• Enhanced Command Trust: Improved handling of piped commands (ls -la | grep ".js") with clearer trust requirements for command chains.

• Workspace Protection: Improved file system tool restrictions to better prevent accidental external modifications

• Command Boundary: Commands with potentially dangerous patterns now require manual approval unless explicitly trusted.

Performance & Reliability

• Automatic Retries: Failed backend requests are automatically retried for improved reliability

• Optimized Model Efficiency: Improvements to optimize frontier model usage with Sonnet

User Experience

• Light Mode Improvements: Resolved theming issues for better visual consistency

• Clearer Login Errors: More helpful error messages when authentication fails

Kiro, a new agentic IDE that helps you do your best work with spec-driven development.

Features

Specs

Structured artifacts that formalize the development process for complex features in your application. Learn more

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Hooks

Set up event-driven automation like updating documentation or generating tests on events such as file save. Learn more

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Steering

Define steering files to guide agent behaviors. Learn more

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Agentic chat

Build features from chat. Turn on Autopilot mode for hands-off execution or approve each change manually. Learn more

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MCP

Integrate with your favorite tools and services. Learn more

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