dagger check and SDKs add fail-fast support

Introduced 2026-04-09 · score 0.92

HOW TO USE IT

When validating a repository, run `dagger check --failfast` to cancel remaining checks after the first failure.

WHY THIS HELPS

Stop a Dagger check run after a failure when validating a repository.

BEFORE THIS CHANGE

By default, every check runs so all failures are reported.

REQUIREMENTS AND LIMITATIONS

• Version: v0.20.4
• --failfast: Cancel remaining checks on the first failure.
• Docs conflict: The current CLI reference documents `--fail-fast`; the v0.20.4 release note and official checking page document `--failfast`. Used the release-era spelling.

FIRST-PARTY EVIDENCE

• https://github.com/dagger/dagger/releases/tag/v0.20.4
• https://docs.dagger.io/cli/checking/

Check the installed version and the source before using it. Entry JSON

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