AWS Serverless Application Model (SAM) Snippets for VS Code

YAML snippets for AWS Serverless Application Model (SAM) resources, common Lambda configurations, parameters, conditions, and intrinsic functions in Visual Studio Code.

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Most infrastructure changes look harmless until next month's AWS bill lands. CloudBurn analyzes the cost impact of your AWS CDK changes right in the GitHub pull request, so expensive mistakes get caught during code review, while a fix is still a one-line change.

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Install the free CDK Diff PR Commenter GitHub Action in the repository where you build your AWS CDK infrastructure

Then install the CloudBurn GitHub App on the same repository

From then on, every PR with infrastructure changes gets a comment with your CDK diff analysis, and CloudBurn adds a cost report next to it:

Monthly cost impact: whether this change raises or lowers your AWS bill, and by how much

Per-resource breakdown: which resources drive the change, old versus new monthly cost

Region-aware pricing: rates match the region your infrastructure actually deploys to

Cost review happens inside code review, so you optimize as you code, while the context is still fresh.

CloudBurn is free during beta. After launch, a free Community plan (1 repository, unlimited users) stays available.

Features

Adds support for the following SAM resource types:

    AWS::Serverless::Api
    AWS::Serverless::Application
    AWS::Serverless::CapacityProvider
    AWS::Serverless::Connector
    AWS::Serverless::Function
    AWS::Serverless::GraphQLApi
    AWS::Serverless::HttpApi
    AWS::Serverless::LayerVersion
    AWS::Serverless::MicrovmImage
    AWS::Serverless::NetworkConnector
    AWS::Serverless::SimpleTable
    AWS::Serverless::StateMachine
    AWS::Serverless::WebSocketApi

Includes editable intrinsic functions and conditions, plus String, Number, CommaDelimitedList, and SSM parameter snippets.
Adds short templates for ZIP functions, image functions, and HTTP API events.
Generates full resource property scaffolds from a pinned AWS SAM schema, with documentation links and required-property annotations.
Available on the Open VSX Registry for Gitpod support.

Usage

Open a .yaml or .yml file and select YAML as its language mode. Type a prefix and choose its completion, or press Ctrl+Space to open suggestions. Use Tab and Shift+Tab to move between placeholders.

Prefix	Inserts	Placement
`sam` or `sam-template`	Minimal SAM template with an inline Lambda function	Empty file
`sam-function-zip`	Function using local source code	`Resources`
`sam-function-image`	Function using an ECR image	`Resources`
`sam-http-event`	HTTP API event	Function `Events`
`sam-parameter-string`	String parameter	`Parameters`
`sam-parameter-number`	Numeric parameter	`Parameters`
`sam-parameter-list`	Comma-delimited list parameter	`Parameters`
`sam-parameter-ssm`	SSM parameter reference	`Parameters`
`serverless-function` or `serverless-function-full`	Full Function property scaffold	`Resources`

Other resource prefixes use the same pattern, such as serverless-api and serverless-connector. Existing resource, condition, and intrinsic prefixes are preserved; conditions and intrinsics also have sam- aliases.

Full property scaffolds include optional and alternative settings. Remove unused properties and fill in their values before deployment. For example, use the ZIP or image variant to avoid mixing CodeUri, InlineCode, and ImageUri. Snippets respect the editor's indentation settings.

sam-length, sam-to-json-string, and sam-for-each require AWS::LanguageExtensions. When combining it with SAM, list AWS::LanguageExtensions before AWS::Serverless-2016-10-31 in Transform. sam-get-stack-output inserts the long form of Fn::GetStackOutput for resource property values.

AWS CloudFormation Snippets for VS Code

If you use AWS CloudFormation to manage your infrastructure as code, check out the CloudFormation Snippets VS Code extension. This extension provides comprehensive coverage, including snippets for:

All AWS CloudFormation resources
All AWS Serverless Application Model (SAM) resource types

The snippets support both YAML and JSON CloudFormation templates, streamlining your infrastructure development workflow.

Key features include:

Autocomplete by simply typing the resource name (e.g., ec2-instance)
Intrinsic functions, conditions, and a wide variety of parameter types
Placeholders for quick navigation within each resource
Inline documentation links for each resource
Automatic weekly updates with the latest CloudFormation Resource Specification

Support

If you have a feature request or an issue, please let me know on Github

Author

Danny Steenman