v6.51.0

v6.51.0 (2025-12-12)

Changed

• Update buildkite/lifecycled to v3.5.0 #1687 (renovate[bot])
• Update buildkite-agent to v3.115.1 #1685 (renovate[bot])
• Update buildkite-agent to v3.115.0 #1684 (renovate[bot])
• Update buildkite-agent to v3.114.1 #1682 (renovate[bot])
• chore(deps): update buildkite plugin docker-compose to v5.12.1 #1680 (renovate[bot])

Added

• Add configurable Docker garbage collection #1659 (JoeColeman95)

Internal

• fix: ensure AMI metadata is set for copy step when builds are skipped #1689 (scadu)
• Fix versions.ps1 matching in Renovate config #1688 (scadu)
• Fix Renovate for tooling using versions.{sh,ps1} scripts #1686 (scadu)
• Do not rebuild Stack AMI when not needed #1681 (scadu)

Agent Changelog

v3.115.1 (2025-12-12)

Full Changelog

Fixes

• PS-1491: Fix double retry issue for k8s mode bootstrap #3628 (@zhming0)

Internal

• PB-1023: remove old kubernetes bootstrap setup #3629 (@zhming0)
• chore(deps): update zstash to v0.6.0 and update progress callback #3630 (@wolfeidau)
• feat: add support for concurrent save and restore operations #3627 (@wolfeidau)

v3.115.0 (2025-12-10)

Full Changelog

Added

• --changed-files-path for pipeline upload, which allows users to specify a list of files changed for if_changed computation #3620 (@pyrocat101)

Fixes

• Further fixes to custom bucket artifact uploads/downloads #3615 (@moskyb)

Internal

• Dependabot updates #3618 #3619 #3622 #3623 #3621 (@dependabot[bot])

v3.114.1 (2025-12-05)

Full Changelog

Fixed

• Fix issue where artifacts uploaded to customer-managed s3 buckets could not be downloaded #3607 (@moskyb)

Internal

• Add an end-to-end testing framework! #3611 #3610 #3609 #3608 #3606 #3604 #3599 (@DrJosh9000)
• Dependency updates #3601 #3600 (@dependabot[bot])
• Update MIME types #3603 (@DrJosh9000)

v6.50.0

v6.50.0 (2025-11-26)

Changed

• Handle missing Docker config in disk space check by @JoeColeman95 in #1679

Internal

• Update changelog for the v6.49.0 release by @scadu in #1678

Upgrading

Perform a CloudFormation stack update with the following URL:
https://s3.amazonaws.com/buildkite-aws-stack/v6.50.0/aws-stack.yml

If you want to launch a new stack, you can use this link (make sure not to use your production AWS account, create a new one for CI):

v6.49.0

v6.49.0 (2025-11-25)

Changed

• Update buildkite-agent to v3.114.0 #1677 (renovate[bot])
• Update ecr plugin to v2.11.0 #1672 (petetomasik)

Added

• Add BuildkiteQueue and AgentsPerInstance tags to Agent Autoscaling groups #1675 (fd-jonathanlinn)

Internal

• chore: add a pr template #1674 (mcncl)
• Update changelog for upcoming release v6.48.0 #1670 (scadu)

Agent Changelog

v3.114.0 (2025-11-25)

Full Changelog

Added

• feat: add agent metadata to OTEL trace attributes #3587 (@pyrocat101)

Fixed

• Fix for the agent sometimes failing to disconnect properly when exiting - agent pool: Send error after disconnecting #3596 (@DrJosh9000)

Internal

• internal/redact: Add another test with minor cleanup #3591 (@DrJosh9000)
• Run gofumpt as part of CI #3589 (@moskyb)

Dependency updates

• build(deps): bump the cloud-providers group with 7 updates #3593 (@dependabot[bot])
• build(deps): bump the container-images group across 5 directories with 1 update #3594 (@dependabot[bot])
• build(deps): bump the container-images group across 1 directory with 2 updates #3595 (@dependabot[bot])
• build(deps): bump golang.org/x/crypto from 0.44.0 to 0.45.0 #3590 (@dependabot[bot])

Upgrading

Perform a CloudFormation stack update with the following URL:
https://s3.amazonaws.com/buildkite-aws-stack/v6.49.0/aws-stack.yml

If you want to launch a new stack, you can use this link (make sure not to use your production AWS account, create a new one for CI):

v6.48.0

v6.48.0 (2025-11-19)

Changed

• Update buildkite-agent to v3.113.0 #1662 (renovate[bot])

Added

• Add option to create VPC endpoints #1665 (scadu)
• Custom Instance Roles #1660 (JoeColeman95)
• Add InstanceScaleInProtection parameter to stack #1666 (JoeColeman95)

Internal

• Actually make base images private #1658 (scadu)
• Make base AMI private #1657 (scadu)
• Revert "Don't rebuild Stack AMI when not needed" #1669 (scadu)
• Fix: skip publish when only templates change #1664 (scadu)
• Fix Stack AMI builds #1663 (scadu)
• Don't rebuild Stack AMI when not needed #1661 (scadu)
• Update changelog for upcoming release v6.47.0 #1655 (scadu)

Agent Changelog

v3.113.0

Compare Source

Full Changelog

Added

• Add Prometheus /metrics handler and some basic metrics #​3576 (@​DrJosh9000)

Fixed

• Fix the pipeline upload --reject-secrets flag not rejecting secrets #​3580 (@​moskyb)
• Fix idle tracking for agents that never received jobs #​3579 (@​scadu)

Internal

• Clarify agent idlemonitor states in comment #​3582 (@​DrJosh9000)
• Put secret scan error into exit message #​3581 (@​DrJosh9000)

Dependency updates

• build(deps): bump the golang-x group with 3 updates #​3583 (@​dependabot[bot])
• build(deps): bump the cloud-providers group with 7 updates #​3584 (@​dependabot[bot])

v3.112.0

Compare Source

Full Changelog

Added

• Add Prometheus /metrics handler and some basic metrics #​3576 (@​DrJosh9000)

Fixed

• Fix the pipeline upload --reject-secrets flag not rejecting secrets #​3580 (@​moskyb)
• Fix idle tracking for agents that never received jobs #​3579 (@​scadu)

Internal

• Clarify agent idlemonitor states in comment #​3582 (@​DrJosh9000)
• Put secret scan error into exit message #​3581 (@​DrJosh9000)

Dependency updates

• build(deps): bump the golang-x group with 3 updates #​3583 (@​dependabot[bot])
• build(deps): bump the cloud-providers group with 7 updates #​3584 (@​dependabot[bot])

Upgrading

Perform a CloudFormation stack update with the following URL:
https://s3.amazonaws.com/buildkite-aws-stack/v6.48.0/aws-stack.yml

If you want to launch a new stack, you can use this link (make sure not to use your production AWS account, create a new one for CI):

v6.47.0

v6.47.0 (2025-11-12)

Fixed

• fix(aws-stack): add BuildkiteTerminateInstanceOnDiskFull to ParameterGroups and Windows env #1635 (ivannalisetska)
• Add missing params to ParameterGroups #1637 (petetomasik)

Added

• Add support for arm64 buildkite-agent-scaler #1653 (scadu)
• Add new param for S3 secrets plugin #1638 (petetomasik)

Internal

• Move versioning and update renovate config #1654 (JoeColeman95)
• Separate cleanup of CFn stacks & service roles #1650 (lucaswilric)
• Missed a usage when renaming 'deleted_counter' #1651 (lucaswilric)
• Deregister old, private AMIs - unless they are shared with other AWS accounts #1648 (lucaswilric)
• Add centralized version management with Renovate automation #1639 (JoeColeman95)
• chore(deps): update buildkite-agent to v3.111.0 #1636 (renovate[bot])
• Update changelog for v6.46.0 release #1634 (scadu)

Dependencies

• chore(deps): bump golang.org/x/sys from 0.37.0 to 0.38.0 #1649 (dependabot[bot])
• chore(deps): update dependency go to v1.25.4 #1641 (renovate[bot])
• chore(deps): update docker/compose to v2.40.3 #1644 (renovate[bot])
• chore(deps): update session-manager-plugin to v1.2.707.0 #1642 (renovate[bot])
• chore(deps): update goss-org/goss to v0.4.9 #1645 (renovate[bot])
• chore(deps): update docker/buildx to v0.29.1 #1647 (renovate[bot])
• Update aws-cli to v2.31.32 #1640 (renovate[bot])
• Update buildkite/lifecycled to v3.4.0 #1646 (renovate[bot])
• Update buildkite plugin docker-compose to v5.12.0 #1643 (renovate[bot])

Full Changelog: v6.45.0...v6.46.0

Upgrading

Perform a CloudFormation stack update with the following URL:
https://s3.amazonaws.com/buildkite-aws-stack/v6.47.0/aws-stack.yml

If you want to launch a new stack, you can use this link (make sure not to use your production AWS account, create a new one for CI):

v6.46.0

v6.46.0 (2025-11-04)

Changed

• chore(deps): update buildkite-agent to v3.110.0 by @renovate[bot] in #1632

Internal

• chore: remove unused workflow file by @mcncl in #1628
• chore(deps): update buildkite plugin docker-compose to v5.11.0 by @renovate[bot] in #1626
• Fix Renovate custom manager for buildkite-agent by @scadu in #1631
• chore: remove notes from Renovate's PR by @scadu in #1633

Agent Changelog

v3.110.0

Compare Source

Full Changelog

Added

• Configurable chunks interval #​3521 (@​catkins)
• Inject OpenTelemetry context to all child processes #​3548 (@​zhming0)
  • This is done using environment variables. This may interfere with existing OTel environment variables if they are manually added some other way.
• Add --literal and --delimiter flags to artifact upload #​3543 (@​DrJosh9000)

Changed

Various improvements and fixes to do with signal and cancel grace periods, and signal handling, most notably:

• When cancelling a job, the timeout before sending a SIGKILL to the job has changed from cancel-grace-period to signal-grace-period (--signal-grace-period-seconds flag, BUILDKITE_SIGNAL_GRACE_PERIOD_SECONDS env var) to allow the agent some extra time to upload job logs and mark the job as finished. By default, signal-grace-period is 1 second shorter than cancel-grace-period. You may wish to increase cancel-grace-period accordingly.
• When SIGQUIT is handled by the bootstrap, the exit code is now 131, and it no longer dumps a stacktrace.
• The recently-added --kubernetes-log-collection-grace-period flag is now deprecated. Instead, use --cancel-grace-period.
• When running the agent interactively, you can now Ctrl-C a third time to exit immediately.
• In Kubernetes mode, the agent now begins shutting down on the first SIGTERM. The kubernetes-bootstrap now swallows SIGTERM with a logged message, and waits for the agent container to send an interrupt.
• When the agent is cancelling jobs because it is stopping, all jobs start cancellation simultaneously. This allows the agent to exit sooner when multiple workers (--spawn flag) are used.
  See #​3549, #​3547, #​3534 (@​DrJosh9000)

Fixed

• Refresh checkout root file handle after checkout hook #​3546 (@​zhming0)
• Bump zzglob to v0.4.2 to fix uploading artifact paths containing ~ #​3539 (@​DrJosh9000)

Internal

• Docs: Add examples for step update commands for priority and notify attributes #​3532 (@​tomowatt)
• Docs: Update URLs in agent cfg comments #​3536 (@​petetomasik)

Dependency updates

• Upgrade Datadog-go to v5.8.1 to work around mod checksum issues #​3538 (@​dannyfallon)
• build(deps): bump the container-images group across 3 directories with 2 updates #​3545 (@​dependabot[bot])
• build(deps): bump gopkg.in/DataDog/dd-trace-go.v1 from 1.74.6 to 1.74.7 #​3544 (@​dependabot[bot])
• build(deps): bump github.com/gofrs/flock from 0.12.1 to 0.13.0 #​3523 (@​dependabot[bot])
• build(deps): bump docker/library/golang from 1.24.8 to 1.24.9 in /.buildkite in the container-images group across 1 directory #​3542 (@​dependabot[bot])
• build(deps): bump the cloud-providers group across 1 directory with 6 updates #​3541 (@​dependabot[bot])
• build(deps): bump the container-images group across 3 directories with 1 update #​3540 (@​dependabot[bot])
• build(deps): bump the golang-x group with 5 updates #​3525 (@​dependabot[bot])

v3.109.1

Compare Source

Full Changelog

Added

• Configurable chunks interval #​3521 (@​catkins)
• Inject OpenTelemetry context to all child processes #​3548 (@​zhming0)
  • This is done using environment variables. This may interfere with existing OTel environment variables if they are manually added some other way.
• Add --literal and --delimiter flags to artifact upload #​3543 (@​DrJosh9000)

Changed

Various improvements and fixes to do with signal and cancel grace periods, and signal handling, most notably:

• When cancelling a job, the timeout before sending a SIGKILL to the job has changed from cancel-grace-period to signal-grace-period (--signal-grace-period-seconds flag, BUILDKITE_SIGNAL_GRACE_PERIOD_SECONDS env var) to allow the agent some extra time to upload job logs and mark the job as finished. By default, signal-grace-period is 1 second shorter than cancel-grace-period. You may wish to increase cancel-grace-period accordingly.
• When SIGQUIT is handled by the bootstrap, the exit code is now 131, and it no longer dumps a stacktrace.
• The recently-added --kubernetes-log-collection-grace-period flag is now deprecated. Instead, use --cancel-grace-period.
• When running the agent interactively, you can now Ctrl-C a third time to exit immediately.
• In Kubernetes mode, the agent now begins shutting down on the first SIGTERM. The kubernetes-bootstrap now swallows SIGTERM with a logged message, and waits for the agent container to send an interrupt.
• When the agent is cancelling jobs because it is stopping, all jobs start cancellation simultaneously. This allows the agent to exit sooner when multiple workers (--spawn flag) are used.
  See #​3549, #​3547, #​3534 (@​DrJosh9000)

Fixed

• Refresh checkout root file handle after checkout hook #​3546 (@​zhming0)
• Bump zzglob to v0.4.2 to fix uploading artifact paths containing ~ #​3539 (@​DrJosh9000)

Internal

• Docs: Add examples for step update commands for priority and notify attributes #​3532 (@​tomowatt)
• Docs: Update URLs in agent cfg comments #​3536 (@​petetomasik)

Dependency updates

• Upgrade Datadog-go to v5.8.1 to work around mod checksum issues #​3538 (@​dannyfallon)
• build(deps): bump the container-images group across 3 directories with 2 updates #​3545 (@​dependabot[bot])
• build(deps): bump g...

v6.45.0

What's Changed

• chore(deps): update dependency go to v1.25.3 by @renovate[bot] in #1609
• Update changelog for v6.44.0 release by @JoeColeman95 in #1623
• stack_deployed_by > stack-deployed-by by @JoeColeman95 in #1624
• Bumping AWS CLI version to 2.31.26 by @JoeColeman95 in #1625

Full Changelog: v6.44.0...v6.45.0

v6.44.0

What's Changed

• chore: bump agent to v3.108.0 by @mcncl in #1613
• chore(deps): bump golang.org/x/sys from 0.36.0 to 0.37.0 by @dependabot[bot] in #1616
• Update changelog for v6.43.0 release by @petetomasik in #1615
• Fix typo'd claim by @petetomasik in #1617
• Fix failure scenarios when EC2 metadata service unavailable by @petetomasik in #1620
• Adding stack_deployed_by and updating README by @JoeColeman95 in #1622

Full Changelog: v6.43.0...v6.44.0

v6.43.0

Note

We've identified an issue with how our docker-compose plugin interacts with the ecr-login Docker credential helper in our ecr plugin.
This release disables AWS ECR Credential Helper as the default login method for the ecr plugin while we investigate.

v6.43.0 (2025-10-09)

Changed

• Add signing parameters to cfn template by @moskyb in #1263

Fixed

• Fix/disable EnableECRCredentialHelper parameter by @petetomasik in #1614

Documentation

• Update changelog for v6.42.0 release by @petetomasik in #1612

Full Changelog

v6.42.0

v6.42.0 (2025-10-07)

Changed

• Cleanup base AMI build logic by @scadu in #1597
• Fix missing refresh_authorized_keys.timer by @scadu in #1604
• Allow ECR Credential Helper to be disabled by @petetomasik in #1600
• Support cross-account SSM Parameter Store paths by @petetomasik in #1605
• Allow configurable Docker default bridge networks by @petetomasik in #1608
• Support arm64 arch for Lambda functions by @petetomasik in #1606

Internal

• Update golang Docker tag to v1.25 by @renovate[bot] in #1610
• Updates to clarify BootstrapScriptUrl and AgentEnvFileUrl Stack params by @petetomasik in #1611
• Update changelog for v6.41.6 release #1602 (scadu)

Full Changelog: v6.41.6...v6.42.0