This is an unsupported preview build of the feature/cloudformationLsp branch of AWS Toolkit.

Install

1. Download the respective plugin zip from the assets below
2. In the IDE, go to Settings -> Plugins
3. Click on Install plugin from disk and select the downloaded zip

Changes

3.105-SNAPSHOT (2026-03-04)

• (Feature) CloudFormation LSP: View and browse CloudFormation stacks and change sets in the AWS Toolkit tool window
• (Feature) Add opt-in prompt for anonymous usage telemetry by CloudFormation Language Server
• (Feature) Add validate and deploy functionality and actions toolbar to CloudFormation Language Server panel
• (Feature) Adds CloudFormation Language Server (LSP) integration to the AWS Toolkit, providing intelligent editing features for CloudFormation templates.
• (Feature) Add the stack resource panel to the CloudFormation tool window. This allows the user to quickly view the logical ID, physical ID, resource type, and status for all of the resources in their stack
• (Feature) Add the stack outputs panel to the CloudFormation tool window. This allows the user to view the key, value, description, and export name for all of the outputs in their stack
• (Feature) Add the resource node in the CloudFormation explorer tab. This node contains the functionality to add/remove resource types from the list, refresh resources, import/clone the resource template state, and copy the stack information of a resource to the clipboard.
• (Feature) Add the stack view panel. Users can right click on a stack name to bring up the panel. The overview panel shows stack name, status, stack ID, description, create time, update time, and status reason.
• (Feature) Added a dropdown in the validation worfklow to allow users to select from opened valid cloudformation template files. The user will still also have the option to browse through all files.