dagger

v0.21.5 Feature

This release adds 2 notable features for engineering teams evaluating rollout.

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Topics

agents cache ci-cd containers devops docker

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graphql workflows

Summary

AI summary

Updates v0.21.5 - 2026-06-10, What to do next?, and https://docs.dagger.io across a mixed release.

Changes in this release

Type	Severity	Summary	CVE
Feature	Low	Added expand option to container.exists Added expand option to container.exists Source: llm_adapter@2026-06-10 Confidence: high	—
Feature	Low	Support both Dang v1 and v2, routed by module engineVersion Support both Dang v1 and v2, routed by module engineVersion Source: llm_adapter@2026-06-10 Confidence: high	—
Performance	Medium	Prune local cache during disk pressure Prune local cache during disk pressure Source: granite4.1:30b@2026-06-10-audit Confidence: low	—
Performance	Medium	Persist trivial core objects Persist trivial core objects Source: granite4.1:30b@2026-06-10-audit Confidence: low	—
Bugfix
Bugfix	Medium	Correct namespaced type-name mangling and cross-dependency interface dispatch in Dang Correct namespaced type-name mangling and cross-dependency interface dispatch in Dang Source: llm_adapter@2026-06-10 Confidence: high	—
Bugfix	Medium	Surface exec errors correctly on the Bun runtime in the TypeScript SDK Surface exec errors correctly on the Bun runtime in the TypeScript SDK Source: llm_adapter@2026-06-10 Confidence: high	—
Bugfix	Medium	Ignore host xattrs for local filesync import identity Ignore host xattrs for local filesync import identity Source: llm_adapter@2026-06-10 Confidence: high	—
Bugfix	Medium	Don't shallow-clone the user's repo for git telemetry labels Don't shallow-clone the user's repo for git telemetry labels Source: llm_adapter@2026-06-10 Confidence: high	—
Bugfix	Medium	Preserve pending lazy container parents Preserve pending lazy container parents Source: llm_adapter@2026-06-10 Confidence: high	—
Bugfix	Medium	Preserve withChanges parent layers Preserve withChanges parent layers Source: llm_adapter@2026-06-10 Confidence: high	—
Bugfix	Medium	Treat incomplete image metadata as cache miss Treat incomplete image metadata as cache miss Source: llm_adapter@2026-06-10 Confidence: high	—
Bugfix	Medium	Cache registry image metadata Cache registry image metadata Source: llm_adapter@2026-06-10 Confidence: low	—
Bugfix	Low	Fix snapshot owner lease attach/remove race Fix snapshot owner lease attach/remove race Source: granite4.1:30b@2026-06-10-audit Confidence: low	—
Bugfix	Low	Follow source symlinks when copying directory contents in layercopy Follow source symlinks when copying directory contents in layercopy Source: granite4.1:30b@2026-06-10-audit Confidence: low	—
Refactor	Low	Don't require id field for interface conformance in Dang Don't require id field for interface conformance in Dang Source: granite4.1:30b@2026-06-10-audit Confidence: low	—
Refactor	Low	Use module-local check names for scale-out Use module-local check names for scale-out Source: granite4.1:30b@2026-06-10-audit Confidence: low	—

Full changelog

v0.21.5 - 2026-06-10

Added

Added expand option to container.exists by @alexcb in https://github.com/dagger/dagger/pull/13310
Support both Dang v1 and v2, routed by module engineVersion by @vito in https://github.com/dagger/dagger/pull/13388

Changed

Prune local cache during disk pressure by @sipsma in https://github.com/dagger/dagger/pull/13375
Persist trivial core objects by @sipsma in https://github.com/dagger/dagger/pull/13387

Fixed

Correct namespaced type-name mangling and cross-dependency interface dispatch in Dang by @vito in https://github.com/dagger/dagger/pull/13377
Surface exec errors correctly on the Bun runtime in the TypeScript SDK by @marcosnils in https://github.com/dagger/dagger/pull/13395
Ignore host xattrs for local filesync import identity by @sipsma in https://github.com/dagger/dagger/pull/13389
Don't shallow-clone the user's repo for git telemetry labels by @marcosnils in https://github.com/dagger/dagger/pull/13363
Preserve pending lazy container parents by @sipsma in https://github.com/dagger/dagger/pull/13365
Preserve withChanges parent layers by @dagger-codex[bot] + @shykes in https://github.com/dagger/dagger/pull/13342
Treat incomplete image metadata as cache miss by @sipsma in https://github.com/dagger/dagger/pull/13346
Cache registry image metadata by @dagger-codex[bot] + @shykes in https://github.com/dagger/dagger/pull/13341
Don't require id field for interface conformance in Dang by @vito in https://github.com/dagger/dagger/pull/13318
Use module-local check names for scale-out by @dagger-codex[bot] + @tiborvass in https://github.com/dagger/dagger/pull/13329
Fix snapshot owner lease attach/remove race by @sipsma in https://github.com/dagger/dagger/pull/13321
Follow source symlinks when copying directory contents in layercopy by @marcosnils in https://github.com/dagger/dagger/pull/13326

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