Captures the design skeleton, hypotheses, and open questions for the
hybrid (rule-based first → AI fallback) Korean date-phrase extractor.
Schema impact, prompt change, UX copy, and library tradeoffs are
sketched but deferred — formalization waits for slice v0.4 dogfood
Pass and the H1 (time-phrase frequency ≥ 30%) check in week-1 retro.
Cross-link added to dogfood-strategy daily-metric table so the H1
data is collected during dogfood, and to README docs map.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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