Example: Parallel Workflow Steps

This example demonstrates parallel and matrix workflow control steps with needs, configurable output, and failure behavior.

Try It

Requires a POSIX shell, or WSL on Windows, because the example workflows run shell commands.

cd examples/parallel-steps

atmos workflow checks -f parallel
atmos workflow prefixed -f parallel
atmos workflow matrix -f parallel

What It Shows

• parallel runs independent child steps concurrently.
• needs makes one child wait for sibling steps.
• output.mode: grouped captures each child and prints labeled blocks.
• output.mode: prefixed streams child output live with line prefixes.
• matrix expands literal axes and runs generated shell steps through the same scheduler.