train()'s ~140-line hand-written flag->config translation (three different
ad hoc "more specific flag wins" patterns) and new_run()'s near-verbatim
copy are replaced by a shared FlagSpec/FLAG_SPECS table and
overrides_from_flags() in config.py, reused by both commands. This makes
the override/precedence logic directly unit-testable without CliRunner,
closing coverage gaps that had zero tests (e.g. --emb-dim/--conditioning
dual-axis fan-out, three of four WGAN knob legs, --stage2-generator
overriding --mode, router's stage1-only asymmetry).
No CLI flags, help text, or precedence semantics changed --
`giant train --help`/`giant new-run --help` are byte-identical before and
after, and all previously-passing CliRunner tests still pass unmodified.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
lars
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