Developer changelog updates for Jun 30, 2026

Summary

CloudFormation now performs automatic pre‑deployment validation on CreateStack and UpdateStack operations, catching errors before resources are provisioned

Summary

Adds CloudFormation and CDK "express" mode that completes stack operations as soon as resources are configured, bypassing long stabilization checks.

Summary

Added dynamic connection scaling for IAM database authentication, letting auth request rates grow with instance resources

Summary

Introduces managed in‑place Slurm major version upgrades for existing PCS clusters, allowing jumps up to three versions ahead.

Summary

Added dual‑stack mode enabling Neptune clusters to accept IPv4, IPv6, or both connections

Summary

Amazon ElastiCache adds T4g node types in Africa (Cape Town), APJ (Jakarta, Osaka), and AWS GovCloud (US‑East, US‑West) regions.

Summary

Added SendRcsMessage API enabling rich media (cards, carousels, images, videos) and interactive suggestion buttons for RCS in all 22 supported countries.

Summary

Seer can hand off issue analysis to a GitHub Copilot agent, generating a pull request in one click.

Summary

Added microsecond‑accurate time on 26 additional EC2 instance types across all commercial regions via Amazon Time Sync Service.

Summary

Announces general availability of Amazon WorkSpaces for AI agents, letting agents securely access and operate legacy desktop applications without code changes.

Summary

General availability of Anthropic's Claude Sonnet 5 model in GitHub Copilot.

Summary

Introduce "reservations‑then‑balanced" AZ distribution strategy for EC2 Auto Scaling groups

Summary

Introduces Capability Insights, an open‑source, self‑hosted dashboard for viewing AWS regional capabilities within your own VPC.

Summary

Added container attribute‑based firewall rules for Amazon EKS and Amazon ECS, allowing policies based on namespace, cluster name, labels, and container instance attributes.

Summary

Introduce branch rulesets to enforce minimum code coverage thresholds on pull requests

Summary

Added a sidebar table of contents to release pages for easier navigation.

Summary

Introduces container image caching for SageMaker Inference, pre‑pulling large model images to halve scale‑out startup latency.

Summary

Introduces the AI Security Best Practices standard in AWS Security Hub CSPM with 31 automated controls for AI workloads.

Summary

Integrates GitHub Copilot Agent into JetBrains AI Assistant, enabling Copilot features within JetBrains IDEs.

Summary

Introduces public preview of open source license compliance for enterprises

Summary

IAM Identity Center now lets customer‑managed applications act as trusted token issuers to discover user accounts/roles and retrieve temporary credentials programmatically.

Summary

Claude Sonnet 5 is now available on AWS through Amazon Bedrock and Claude Platform, offering unified access with AWS billing and authentication.

Summary

Added serverless model customization (SFT, DPO, RFT) for Gemma 4 E4B and 31B models

Summary

Announces GA of EC2 C9g and C9gd compute‑optimized instances powered by 5th‑gen Graviton5 processors

Summary

AWS launches Interconnect - last mile, a fully managed service for linking branch offices, data centers, and remote sites to AWS with a few clicks.

Summary

Dependabot stops automatically generating .npmrc settings for private npm registries.

Summary

GitHub will retain data for closed Dependabot security alerts for a defined period starting August 25, 2026.

Summary

Introduce access restrictions to several public API endpoints, requiring authentication or specific permissions.

Summary

Claude Opus 4.8 is now offered on AWS GovCloud (US) through Amazon Bedrock.

Summary

Added OpenAI GPT-5.4 (272K context, 1.2x credit multiplier) to Kiro in AWS GovCloud US-West for complex reasoning, coding, and multi-step agentic workflows.

Summary

Adds DDoS Protection client SDKs for C# and Unity, offering token‑based authentication and per‑player traffic limits to safeguard multiplayer sessions.

Summary

Admins can set a per‑user AI credit budget for each member of a cost center

Summary

CloudWatch pipelines now can process and enrich OpenTelemetry metrics during ingestion.

Summary

Multiple AWS services (e.g., Bedrock Agents Classic, Cognito Sync, SageMaker AI features) are moving to maintenance mode and will be inaccessible to new customers after July‑August 2026.

Summary

Added support for writing SQL query results to intermediate tables within a collaboration

Summary

Added support for Team MCPs in team marketplaces