CMDx 2.0 is a full runtime rewrite focused on speed, ergonomics, and observability for service-object-style business logic.

Highlights:

Halts are ~2.5× faster, workflow failures ~3×, allocations down 50–80%.

• Faster runtime — frozen results, fiber-local chains, copy-on-write registries, and a slimmer hot path
• Cleaner task API — def work + Task.execute / execute!, declared outputs, around_execution, pattern matching on Result
• Saga-style workflows — automatic rollback across groups, parallel execution with :threads or :fibers, pluggable merge strategies
• Better failure handling — Fault.for? / .reason? / .matches? matchers you can rescue, retries with built-in jitter strategies (:exponential, :fibonacci, :decorrelated_jitter)
• First-class observability — telemetry pub/sub, correlation ids threaded through every task, structured logs out of the box
• Lighter footprint — stdlib only at runtime (no ActiveSupport), Ruby 3.3+

Manpages:

• Docs: https://drexed.github.io/cmdx/
• Repo: https://github.com/drexed/cmdx
• Migration guide: https://github.com/drexed/cmdx/blob/main/docs/v2-migration.md