1. _merge_config: track explicit fields instead of comparing to defaults
2. plan_install: let asset resolution errors propagate (fail loudly)
3. _install_binary/_install_appimage: use argv lists instead of shell strings
4. _find_module: narrow exception to OSError/YAMLError, raise ConfigError
5. _install_binary: use pkg.extract_dir to scope binary search
6. plan_install: raise FlowError when pkg type needs PM but none found
7. Frozen dataclasses: change mutable list fields to tuples throughout
8. Remove dead stream_shell method and unused Console import
9. Guard os.getuid() with hasattr for cross-platform safety
10. _parse_targets: raise ConfigError on malformed entries
11. Bootstrap modules: use shlex.quote on all interpolated values
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Delete old core modules (action, stow, process, system, variables),
old services (package_defs, ssh), and all tests for deleted code.
191 tests pass with the new codebase.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Complete rewrite of all core modules with proper abstractions:
- FlowError hierarchy with PlanConflict and ExecutionError
- Pure template substitution ($VAR, ${VAR}, {{expr}})
- XDG path constants
- Frozen PlatformInfo dataclass with context detection
- Console with color/quiet/TTY support
- Runtime primitives (CommandRunner, FileSystem, GitClient, SystemRuntime)
- Config loading with target parsing and manifest merging
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
