0.4 release tracker

[dulinriley]

This issue will track progress and release notes for the 0.4 release.
Expected release date: March 19, 2026
Planned Changes

• RDMA
  • Support for AWS EFA
  • Potentially support for ROCm RDMA
  • RDMA - Refactor the manager actor so it can support multiple backends (fallback to TCP, support EFA). #2571 Unified API to make it easier to port to other hardware or TCP backend
• Observability
  • Add more structured live status data to distributed SQL telemetry  #2448 Native per-job dashboard compatible with OSS, based on telemetry gathered from the whole monarch job
  • Perfetto traces for OSS
  • mesh admin API and reference tui/cli/etc. #2803 Admin Terminal UI
  • Persist live SQL telemetry data after job ends for post-mortem debugging #2977
• Kubernetes
  • Support for just-in-time provisioning of pods
  • Add out-of-cluster support for KubernetesJob #2657 External gateway for an out-of-cluster client to drive a job
• Large scale barrier reproducible benchmark. #2800 Reproducible benchmark for large-scale barrier, along with improvements to the performance of this barrier
• Implement ProcSpawner RFC. #2548 New ProcSpawner API for supporting processes spawned by other mechanisms, such as processes spawned in a Docker container

Comments can be added for notable completed tasks / PRs that don't fall into the above categories

[dulinriley]

For release notes: #2656 was merged which deletes the monarch.utils package. There is a direct replacement for the only function it provided, change:

from monarch.utils import setup_env_for_distributed

to

from monarch.spmd import setup_torch_elastic_env_async

There was a deprecation notice already on this function saying it would be removed in 0.3, which it wasn't. It is removed from 0.4

[dulinriley]

The dashboard is close to being ready for production: #2955

[dulinriley]

We're delaying the release by one week, it will now be on March 26, 2026. First release candidate will be put out on March 19, 2026