V0.21.8 - Dagger — ContextQMD

v0.21.8 - 2026-07-29

Changeset diffs are now computed from filesystem metadata instead of full-content comparison, significantly speeding up diff computation for large directories. by @marcosnils in https://github.com/dagger/dagger/pull/13615

Dockerfile build layer caching so unrelated build-context changes no longer bust the cache: COPY-ed directories now get a content-based cache identity, re-keying downstream steps only when copied content actually changes. by @marcosnils in https://github.com/dagger/dagger/pull/13765
The --x-release CLI re-exec so _EXPERIMENTAL_DAGGER_RUNNER_HOST is preserved (with a warning) instead of being stripped, and clarified its startup message to avoid implying it runs from any build. by @tiborvass in https://github.com/dagger/dagger/pull/13752
Silent SDK sessions no longer retain frontend telemetry in memory while Cloud and OTLP export remain enabled. DAGGER_SILENT is now honored as the equivalent of --silent. by @sipsma in https://github.com/dagger/dagger/pull/13762