Framework choice guide

base-cli is intentionally a lifecycle layer, not a replacement parser. The right choice depends on whether a project needs only argument parsing or also needs a repeatable operational contract around every invocation.

Comparison

Concern	Click	Typer	base-cli
Argument parsing and command trees	Core capability	Click-based, type-hint-friendly layer	Uses Click and can attach to Typer trees
Consistent per-run context	Consumer-defined	Consumer-defined	Context carries paths, config, logging, and cleanup
Logging and diagnostics	Application-defined	Application-defined	Structured stderr logging and persistent run metadata
Configuration policy	Application-defined	Application-defined	Consumer-owned CliProfile boundary with optional batteries
Cleanup and temporary state	Application-defined	Application-defined	Deterministic lifecycle hooks and per-run paths
Machine-readable contracts	Application-defined	Application-defined	Versioned JSON and record/output contracts
Best fit	A small or custom command surface	Typed Click applications	Production CLIs that need consistent operations across commands

This is a boundary comparison, not a feature-count ranking. Click and Typer remain the parser and command-definition choices; base-cli composes with them when the application also needs lifecycle, diagnostics, and compatibility contracts.

Five-minute evaluation

1. Install the wheel in a clean environment:

python -m pip install base-cli

1. Copy the minimal command and run its test suite.

2. Add one command-specific option and confirm that logs remain on stderr while command output remains on stdout.

3. Run the same command with --debug and --keep-temp, then inspect the run context and retained log paths.

4. If the application already uses Typer, install base-cli[typer] and follow the Typer adapter guide.

For a production migration checklist, continue with the adopter readiness guide.