ST-2026-129 · SDKs, clients & toolchains
AWS Copilot CLI reaches end of support
AWS ended support for the Copilot CLI on 12 June 2026; the open-source project remains available, but AWS no longer provides new features or security updates.
Previous state
AWS maintained and supported the Copilot CLI for deploying and operating containerised applications.
Current state
The project remains available as open source, but AWS no longer supplies new features or security updates and points users to Amazon ECS Express Mode or AWS CDK Layer 3 constructs.
Affected users
Who needs to care
Teams relying on AWS Copilot CLI for ECS application definition, deployment and operational workflows.
Required response
What to do
Assess unsupported-use risk, preserve deployment state, and plan migration to ECS Express Mode, AWS CDK Layer 3 constructs or another maintained workflow.
Evidence boundary
What the source does not prove
End of AWS support is not deletion of the repository and does not cause already deployed Copilot-managed resources to fail automatically.
Lifecycle history
Dated event sequence
- End of support announced
AWS published the support-end date and replacement directions.
- AWS support ended
New features and security updates from AWS ceased.
Evidence ledger
First-party sources
- 01Amazon Web Services — Announcing the end of support for the AWS Copilot CLI
Official support-lifecycle announcement · 2026-03-06
Open official source ↗