v4.0.0-beta.1

v4.0.0-beta.1 (2026-04-22)

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Changed in v4

• The following experiments are now default behaviour (promoted):
  • normalised-upload-paths
  • override-zero-exit-on-cancel
  • resolve-commit-after-checkout
  • propagate-agent-config-vars
• Remove allow-artifact-path-traversal experiment
• Remove deprecated Docker support
• spawn-with-priority is now a string, removing the descending-spawn-priority experiment #3821 (@moskyb)
• Newline after meta data get #3835 (@moskyb)
• Remove deprecated CLI flags #3834 (@moskyb)
• Remove deprecated plugin env vars #3852 (@DrJosh9000)

Changed in v3 since v3.123.1

Added

• SIGKILL is now supported as a cancel signal, and can be used to interrupt processes on Windows that absorb Ctrl-Break without exiting
  #3814 (@DrJosh9000)
• feat: add metrics to record histogram of chunk sizes and compressed size #3833 (@wolfeidau)
• feat: migrate to github.com/klauspost/compress/gzip for optimized deflate #3832 (@wolfeidau)

Fixed

• fix: More consistent protected env vars #3838 (@DrJosh9000)
• fix: Hide detached-HEAD advice #3851 (@DrJosh9000)
• fix: set PTY raw mode before process start #3837 (@lox)

Internal

• fix: Make TestChunksIntervalSeconds less flaky #3850 (@DrJosh9000)
• chore: rename mise config and add tasks #3839 (@lox)
• Removal manual gates from deployment process #3830 (@zhming0)
• Normalise HTTP status-based retry policies across the agent #3827 (@moskyb)

v3.123.1

v3.123.1 (2026-04-17)

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Fixed

• Fix --glob-resolve-follow-symlinks regression #3828 (@zhming0)
• Prevent snapshot logic if command phase isn't included #3825 (@DrJosh9000)
• Per-agent snapshot clones for git mirrors #3789 (@DrJosh9000)

Internal

• E2E test coverage for bulk artifacts upload/download #3824 (@zhming0)
• Dependabot updates: #3816, #3817, #3818, #3819 (@dependabot[bot])

v3.123.0

v3.123.0 (2026-04-14)

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Added

• Add zip archive support for plugins #3713 (@adnowakodbx1)
• Support PowerShell 7 #3759 (@markmssd)
• Allow K8s container start timeout to be configured #3820 (@zhming0)
• Make checkout retry attempt configurable, increasing default retry #3822 (@zhming0)

Fixed

• Fix incorrect check in TestAnnotateMaxBodySize, clean up assert #3810 (@DrJosh9000)
• Compile badChars regexp once #3811 (@DrJosh9000)
• Refactor ArtifactBatchCreator to use iterator #3812 (@zhming0)

Internal

• Release script #3806 (@swebb)
• Dependabot updates: #3813 (@dependabot[bot])

v3.122.0

v3.122.0 (2026-04-09)

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Tip

🎉 ✨ Streaming job dispatch (General Availability): Starting this version, Agent's default endpoint has been changed to https://agent-edge.buildkite.com/v3, we expect this to vastly accelerate job acceptance latency.

Changed

• Streaming Job Dispatch is now enabled by default: the default agent API endpoint has been changed from https://agent.buildkite.com/v3 to https://agent-edge.buildkite.com/v3 #3808 (@zhming0)

v3.121.1

v3.121.1 (2026-04-08)

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Change

• Map executor setup failures to exit_status -1 #3769 (kainanpeace666)

Fix

• Don't send commit metadata when BUILDKITE_SKIP_CHECKOUT is set #3790 (swebb)

Security

• Go 1.25.9 #3805 (swebb)

Dependency updates

• build(deps): bump docker/library/golang from 1.25.8 to 1.25.9 in /.buildkite in the container-images group across 1 directory #3804 (dependabot[bot])
• build(deps): bump cloud.google.com/go/kms from 1.26.0 to 1.27.0 #3799 (dependabot[bot])
• build(deps): bump the cloud-providers group across 1 directory with 6 updates #3797 (dependabot[bot])
• build(deps): bump github.com/buildkite/go-buildkite/v4 from 4.17.0 to 4.18.0 #3798 (dependabot[bot])
• build(deps): bump the container-images group across 5 directories with 1 update #3796 (dependabot[bot])
• build(deps): bump the otel group with 5 updates #3795 (dependabot[bot])
• build(deps): bump github.com/buildkite/go-buildkite/v4 from 4.16.0 to 4.17.0 #3787 (dependabot[bot])
• build(deps): bump the cloud-providers group with 8 updates #3786 (dependabot[bot])
• build(deps): bump the container-images group across 3 directories with 1 update #3785 (dependabot[bot])

v3.121.0

v3.121.0 (2026-03-25)

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Tip

In order to make Git Mirrors more reliable, checkouts using a mirror can now be dissociated from the mirror. This approach still avoids fetching objects from the remote if they are present the mirror, but stores a copy of the objects in the checkout, preventing the checkout from becoming corrupted through entirely normal operation of the mirror.
To opt into this behaviour set the flag --git-mirror-checkout-mode=dissociate or agent environment variable BUILDKITE_GIT_MIRROR_CHECKOUT_MODE=dissociate.

Added

• Add GCP KMS Signing #3660 (@tomowatt)
• Support for dissociated clones of git mirrors #3775, #3788 (@DrJosh9000)
• Add --subject-claim flag to oidc request-token #3784 (@zero51)

Changed

• Job logger trace correlation #3782 (@aapzu)

v3.120.3

v3.120.3 (2026-03-24)

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Tip

🎉 ✨ Streaming job dispatch (Public Preview): Version 3.120.0 adds opt-in support for a new streaming connection between agents and Buildkite, significantly reducing job acceptance latency for self-hosted agents. To try it, start your agent with --endpoint https://agent-edge.buildkite.com/v3, for example:

buildkite-agent start --endpoint https://agent-edge.buildkite.com/v3

You may alternatively use the environment variable BUILDKITE_AGENT_ENDPOINT or edit your buildkite-agent.cfg to contain endpoint=https://agent-edge.buildkite.com/v3.

This capability is in public preview and will become the default in a future release. If you have any feedback or run into issues, please reach out to support@buildkite.com.

Fixed

• A-1020: make connect.CodeInternal error recoverable for pings stream #3780 (@zhming0)

Internal

• Update/clarify supported Windows versions #3776 (@petetomasik)

Dependency updates

• build(deps): bump the cloud-providers group with 2 updates #3777 (@dependabot[bot])
• build(deps): bump the container-images group across 5 directories with 1 update #3778 (@dependabot[bot])
• build(deps): bump the container-images group across 1 directory with 2 updates #3779 (@dependabot[bot])

v3.120.2

v3.120.2 (2026-03-23)

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Fixed

• Send HTTP/2 ping frames to keep streaming connections open #3773 (@moskyb)

Internal

• Update readme supported macOS versions #3772 (@DrJosh9000)

v3.120.1

v3.120.1 (2026-03-17)

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Tip

🎉 ✨ Streaming job dispatch (Public Preview): Version 3.120.0 adds opt-in support for a new streaming connection between agents and Buildkite, significantly reducing job acceptance latency for self-hosted agents. To try it, start your agent with --endpoint https://agent-edge.buildkite.com/v3, for example:

buildkite-agent start --endpoint https://agent-edge.buildkite.com/v3

You may alternatively use the environment variable BUILDKITE_AGENT_ENDPOINT or edit your buildkite-agent.cfg to contain endpoint=https://agent-edge.buildkite.com/v3.

This capability is in public preview and will become the default in a future release. If you have any feedback or run into issues, please reach out to support@buildkite.com.

Fixed

• Adds API_KEY values to the redacted list #3761 (@mcncl)
• fix: Support []string fields in ReadFromEnvironment #3767 (@DrJosh9000)

Internal

• Trigger docs-draft-writer pipeline on merge to main #3760 (@omehegan)

Dependency updates

• build(deps): bump the container-images group across 1 directory with 2 updates #3764 (@dependabot[bot])
• build(deps): bump the container-images group across 5 directories with 2 updates #3766 (@dependabot[bot])
• build(deps): bump the golang-x group with 3 updates #3762 (@dependabot[bot])
• build(deps): bump the cloud-providers group with 8 updates #3765 (@dependabot[bot])

v3.120.0

v3.120.0 (2026-03-13)

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Tip

🎉 ✨ Streaming job dispatch (Public Preview): This release adds opt-in support for a new streaming connection between agents and Buildkite, significantly reducing job acceptance latency for self-hosted agents. To try it, start your agent with --endpoint https://agent-edge.buildkite.com/v3, for example:

buildkite-agent start --endpoint https://agent-edge.buildkite.com/v3

You may alternatively use the environment variable BUILDKITE_AGENT_ENDPOINT or edit your buildkite-agent.cfg to contain endpoint=https://agent-edge.buildkite.com/v3.

This capability is in public preview and will become the default in a future release. If you have any feedback or run into issues, please reach out to support@buildkite.com.

Note

The minimum version of Go used to build the agent is now Go 1.25.

Fixed

• fix: Make submodule clone config an agent config #3752 (@DrJosh9000)
• fix: prevent header times scan panic after stop #3740 (@lox)
• fix: handle multiple lifecycle hooks without closed pipe reuse #3741 (@lox)
• fix: potential deadlock in baton #3754 (@DrJosh9000)
• fix: Use targetPath helper and tempfile for Azure Blob download #3751 (@DrJosh9000)

Internal

• Add feature detection for streaming pings #3757 (@moskyb)
• chore: Apply other go fixes #3756 (@DrJosh9000)
• chore: use WaitGroup.Go where possible #3755 (@DrJosh9000)

Dependency updates

• build(deps): bump the container-images group across 5 directories with 1 update #3749 (@dependabot[bot])
• Upgrade to Go 1.25 and update all dependencies #3750 (@DrJosh9000)