V0.21.9 - Dagger — ContextQMD

v0.21.9 - 2026-08-25

Added SSHFS-backed volumes, allowing remote filesystems to be mounted into containers without copying their contents into Dagger's content store by @sipsma in https://github.com/dagger/dagger/pull/13462

Container.withDirectory and Directory.withDirectory no longer restore by @sipsma in https://github.com/dagger/dagger/pull/13848
deleted nested files after execs remove and recreate an ancestor directory.
Engine client enumeration no longer blocks behind another session's by @sipsma in https://github.com/dagger/dagger/pull/13542
initialization or teardown, preventing Cloud keeper heartbeats from stalling and live engines from being suspended.
Session teardown now runs in the background after the main client disconnects, by @sipsma in https://github.com/dagger/dagger/pull/13681
preventing shutdown responses from timing out while the engine releases session-owned cache results.
The engine now bounds retained DAGQL cache metadata independently of disk by @sipsma in https://github.com/dagger/dagger/pull/13846
usage by pruning cold persisted results when the structural estimate exceeds its configured limit. This may mitigate metadata growth at scale while preserving active and engine-lifetime cache roots.
Registry protocol probes no longer appear as scary errors in progress output by @vito in https://github.com/dagger/dagger/pull/13410
when image pulls or publishes succeed, while genuine registry failures remain visible.
Registry authentication no longer invalidates downstream container cache reuse across sessions when applied before or after Container.from by @sipsma in https://github.com/dagger/dagger/pull/13901