## ADDED Requirements

### Requirement: Repository unit-test coverage meets the engineering baseline

The repository SHALL maintain at least 95% unit-test coverage for the
`eos_downloader` package when the unit-test suite is run with coverage enabled.

#### Scenario: Unit-test suite meets the threshold
- **WHEN** the maintainers run the unit-test suite with coverage for `eos_downloader`
- **THEN** the reported total coverage is at least 95%

#### Scenario: Newly added tests target uncovered logic
- **WHEN** a change is made to close a coverage gap
- **THEN** the added tests cover previously uncovered or weakly covered branches rather than only duplicating existing happy-path coverage

### Requirement: Hotspot modules are decomposed by responsibility

The implementation SHALL decompose the current high-complexity hotspot modules
into smaller, focused units so that CLI orchestration, download orchestration,
configuration mapping, and progress/reporting concerns are not all carried by a
single large implementation block.

#### Scenario: CLI download orchestration is split into focused units
- **WHEN** the `get` command flow is refactored
- **THEN** version resolution, option validation, artifact lookup, and post-download actions are implemented in focused units with clear responsibilities

#### Scenario: Shared helper internals are separated by concern
- **WHEN** shared helper/reporting code is reorganized
- **THEN** signal handling, progress reporting, and transfer orchestration are no longer implemented as one monolithic helper module

### Requirement: Refactoring preserves public behavior

The maintainability refactor SHALL preserve the current public CLI and library
behavior for supported workflows.

#### Scenario: Existing CLI workflows remain valid
- **WHEN** users invoke currently supported `ardl` commands and flags after the refactor
- **THEN** the commands continue to accept the same public inputs and produce the same outcomes, excluding incidental internal logging differences

#### Scenario: Existing library entry points remain usable
- **WHEN** downstream callers use the current public downloader and version-discovery entry points
- **THEN** those entry points remain available and continue to behave compatibly with their current contract

### Requirement: Shared EOS and CVP command logic avoids unsafe duplication

The CLI implementation SHALL centralize shared EOS and CVP command-path logic
where duplicated branching currently creates parallel maintenance paths.

#### Scenario: Shared validation and error handling are reused
- **WHEN** EOS and CVP command flows need the same validation or error-rendering behavior
- **THEN** that behavior is implemented through shared helpers instead of duplicated command branches

#### Scenario: Format-specific behavior remains explicit
- **WHEN** EOS- or CVP-specific behavior is still required
- **THEN** the shared orchestration keeps those format- or package-specific branches explicit rather than hiding them in generic abstractions
