Bump version and changelog for v3.120.0

[DrJosh9000]

v3.120.0 (2026-03-13)

Full Changelog

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)