Package Structure

The compatibility boundary is intentionally smaller than the source tree.

Public modules

• openamundsen_da: version, six workflow operations, typed results and public exceptions
• openamundsen_da.api: single-domain workflow implementation used by the top-level exports
• openamundsen_da.observations: the two public observation preprocessors
• openamundsen_da.exceptions: exception hierarchy rooted at OpenAmundsenDAError

The installed console surface contains only openamundsen-da.

Internal modules

• core: model launching, forcing and shared execution utilities
• pipeline: preparation, execution, rendering and cleanup orchestration
• methods: observation operators, particle-filter stages, benchmarks and visualization
• io: strict path/config/model-grid adapters
• subdomain: distinct data assimilation and plain-model staged workflows
• util: shared validation, manifests, grid summaries and spatial helpers

Subdomain Python modules and lower-level method functions are internal. Their supported user interface is the umbrella command tree.

Filesystem ownership

The setup root owns shared openAMUNDSEN inputs. A project owns its YAML, steps, manifest and results. Generated steps and member directories are runtime data, not source configuration. See Configuration and Output Data.