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AWS bedrock-agentcore documentation change

Service: bedrock-agentcore · 2026-05-16 · Documentation low

File: bedrock-agentcore/latest/devguide/release-notes.md

Summary

Added documentation for new Bring-Your-Own File System feature supporting S3/EFS mounts.

Security assessment

Purely additive feature announcement without security context. No evidence of security issue remediation or vulnerability disclosure.

Diff

diff --git a/bedrock-agentcore/latest/devguide/release-notes.md b/bedrock-agentcore/latest/devguide/release-notes.md
index 4f6142cb8..5d1c5ee52 100644
--- a//bedrock-agentcore/latest/devguide/release-notes.md
+++ b//bedrock-agentcore/latest/devguide/release-notes.md
@@ -14,0 +15,4 @@ We recommend subscribing to the RSS feed so updates to these notes are delivered
+### Harness: Bring-Your-Own File System (Amazon S3 Files and Amazon EFS)
+
+AgentCore harnesses now support Amazon S3 Files and Amazon EFS access points alongside managed session storage. Attach access points at `CreateHarness` or `UpdateHarness` time and the harness mounts them into every session at a path you specify. Use S3 Files for round-trip with an S3 bucket, EFS for low-latency shared storage, or combine up to five mounts on a single harness. See [Filesystem](https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/harness-memory.html#harness-filesystem).
+