Semiotic Files

Added

• Stream suggestion for ordinal and value charts — suggestStreamCharts now registers BarChart, GroupedBarChart, StackedBarChart, PieChart, DonutChart, BigNumber, and GaugeChart. A keyed { brand, revenue } schema and a single-row aggregate both return charts instead of an empty list.
• StreamSchema.shape and keyFields — first-class changelog semantics (append / keyed / aggregate) plus a key field role distinct from category.
• Audience, stretch, and exclusions on stream suggestion — suggestStreamCharts takes audience, returns { suggestions, excluded, stretchSuggestions }, and explainStreamCapabilityFit is the diagnostic alias.
• suggestStreamDashboard and AudienceProfile.dashboard layout policy (cell budget, lead families, density, window preference).
• applyChangelog maps insert/upsert/update/retract batches onto a realtime handle. T-digest percentiles and HyperLogLog distinct counts are opt-in on WindowAccumulator.
• Staleness source state — StalenessConfig.state / settling so a stopped or failed source reads Stopped/Failed, not Stale.
• Controlled-data SSR for RealtimeLineChart, RealtimeHeatmap, RealtimeHistogram, RealtimeSwarmChart, and RealtimeWaterfallChart.
• RealtimeLineChart.seriesAccessor, top-level pulse / decay / staleness on Scatterplot (and Bubble/ConnectedScatterplot), and a canvas linkedHover worked example.
• Registered intent phrases and composed-intent communicativeActForIntent resolution.

Changed

• LineChart direct labels share measured placement across browser, SSR, and static rendering, with accessible fallback content and layout evidence.
• Keyed path transitions use pointIdAccessor to preserve point identity and intro clipping during updates.
• Event-time reordering and fixed-window retention use priority queues; session events update their existing statistics and sketches directly. T-digest compression is batched by pending observations, and HyperLogLog maintains its estimator incrementally for constant-time distinct readouts.
• Accessibility auditing uses generated chart-name and text-prop metadata. Unused validation catalogs can be removed from AI and chart imports.
• suggestStreamCharts return type — now { suggestions, excluded, stretchSuggestions } instead of an array. Migration: const { suggestions } = suggestStreamCharts(...).
• StreamChartCapability.importPath is a free string so wrappers can declare their own library.
• Throughput accepts a rows-per-second number as well as the low/medium/high bands.
• capacity / capacityMode alias windowSize / windowMode so "window" can mean the aggregation window.
• semiotic/ai/core re-exports audience types, stream capability types, and RealtimeFrameHandle is also exported from semiotic/xy.

Fixed

• RealtimeLineChart aggregate handles expose new rows immediately after push, pushMany, flush, and clear, including within React batches.
• Large event-time releases and t-digest merges avoid JavaScript argument limits that previously caused stack-overflow errors.
• Realtime server rendering preserves fixed domains, heatmap aggregation, aggregate envelopes, mark styles, category colors, and retention aliases. The category-color correction also applies to TemporalHistogram.
• RealtimeLineChart aggregates each seriesAccessor group independently in both React and server renders, including bands and per-series retention.
• Stream inference excludes timestamps and incompatible field kinds from measures. Dashboard stretch panels honor the requested intents, allow-list, and budget, and include unused candidates.
• Changelog coalescing preserves last-event order, and upserts restore keys evicted earlier in the same bounded-buffer batch.
• T-digest quantiles interpolate between centroid centers, correcting biased medians for small windows.
• Server bundles register scene builders without loading canvas painters; browser frames still load their painters when needed. Production bundles preserve tree-shaking annotations, and chart descriptions share a small intent registry without importing the full inference catalog.