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feat(l0): flag text that cannot follow a theme - #6
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An emoji is painted from the colour font with its colours baked in, so `draw_text.color` never reaches it. A card that uses one as an icon renders correctly under exactly the polarity its author had on screen, and is invisible under the other — white plates on cream, in the case that surfaced it. This cost real measurement time to find. Four separate judge verdicts said "white icons vanish on cream" while an experiment assumed the palette was at fault and spent two rounds tuning it; the icons were never icon widgets, they were `TextRow(text: "🍽")`, and no palette can tint them. `UiL0Report` gains a `lints` channel, separate from `diagnostics` on purpose: a lint that could refuse a card would be a rule, and this is not a rule. The card is valid and will realize. It is just not portable, and nothing else in the pipeline can tell you so. Swept over the 967-card corpus it flags 81 cards and 138 glyphs — mostly 🌳, ☕ and 🍽 standing in for icons — and refuses none of them. Latin, CJK, accents, em dashes and ellipses are monochrome and carry no lint. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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An emoji is painted from the colour font with its colours baked in, so
draw_text.colornever reaches it. A card using one as an icon renders correctly under exactly the polarity its author had on screen, and is invisible under the other.How this surfaced
Four separate blind judge verdicts said "white icons vanish on cream" during a palette-transfer experiment. Two rounds were spent tuning the palette on the assumption it was at fault. The icons were never icon widgets — they were:
No palette can tint that. The experiment was measuring a defect it could not fix.
What's added
UiL0Reportgains alintschannel, separate fromdiagnosticson purpose: a lint that could refuse a card would be a rule, and this is not a rule. The card is valid and will realize — it just isn't portable, and nothing else in the pipeline can say so.Only the pictographic blocks are swept (plus U+FE0F, the "render in colour" selector). Latin, CJK, accents, em dashes and ellipses are monochrome and take the theme's ink correctly.
Measured on the corpus
🌳(44),☕(43),🍽(27)Two tests: an emoji card is flagged but stays valid; ordinary Latin/CJK/accented text carries no lint.
examples/lint_check.rsruns it over any set of cards.Note: 3 pre-existing failures in
tests/profile.rs(catalog/TOML drift) are unrelated and present onmainbefore this change.🤖 Generated with Claude Code