What changed
AWS extended the DevOps Agent release-testing preview so teams can target DevOps Agent Skills and supply AGENTS.md instructions while the agent runs automated UI and REST API tests against deployed applications.
Why it matters
Release tests can now carry repository-specific procedures into browser and API execution. That makes instruction provenance, test identity, environment scope and the final deployed state part of the release gate rather than incidental prompt context.
What to do
Create one read-only skill and a narrowly scoped AGENTS.md file for a disposable application. Run a UI and API test, inspect the generated plan and credentials, deny an out-of-scope action, and independently verify the application and test-environment state before allowing the result to gate a release.
Caveat
Release management remains a preview, and AWS documents the capability rather than an independent accuracy or security result. Skills and AGENTS.md can carry unsafe or stale instructions; generated tests can miss regressions or change state if credentials and environments are too broad.