* fix(config): warn on unrecognized keys in config.json instead of silent drop (#1535)
loadConfig() silently ignores any config.json keys not in its known
set, leaving users confused when their settings have no effect. Add a
stderr warning listing unrecognized top-level keys so the problem
surfaces immediately.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(config): derive known keys from VALID_CONFIG_KEYS instead of hardcoded set
Address review feedback: replace hardcoded KNOWN_CONFIG_KEYS with
programmatic derivation from config-set's VALID_CONFIG_KEYS (single
source of truth). New config keys added to config-set are automatically
recognized by loadConfig without a separate update. Add sync test
verifying all VALID_CONFIG_KEYS entries pass without warning.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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