Issue 1 – Bar charts blank/lines only:
- Silent fall-through on unsupported chart_types (donut, stacked_bar, area)
now raises ValueError instead of producing axes-only output
- Zero-width bars on duplicate/single dates fixed via sorted-gap calculation
- Donut chart type added (ring with percentage labels)
- Pie/donut routing now triggers on any() instead of all()
Issue 2 – Axis controls not applying:
- AxisSpec gains date_min/date_max (x-axis clamping via prompts)
- y-bounds no longer silently widened when user sets min_val/max_val
- Tick clamping: ticks outside user range are dropped not widened
- New dual_y_axis layout with independent left/right Y-axes and y_axis_side per series
- Endpoint Y-axis labels (min/max) always render even when spacing is tight
Issue 3+4 – Font fallback & InDesign compatibility:
- Replace CairoSVG with Playwright/headless Chromium for PNG and PDF export
- Chromium honours @font-face base64 data URIs → Roboto Condensed in all exports
- PDF output contains embedded TTF subsets and real text operators (selectable
in InDesign/Illustrator, no path-outlining, consistent across regions)
- FastAPI lifespan manages persistent Playwright browser instance
Issue 5 – Stroke weight drift:
- All stroke_width values now carry explicit "px" unit suffix
- SVG root gets width="…px" height="…px" so 1 SVG px = 0.75 PDF pt exactly
AI improvements:
- Prompts document date_min/date_max, scale_kind, dual_y_axis, donut
- Rule 9 softened: user-specified ranges are honoured even if they crop data
- Refinement uses deep-merge so tick_interval/min_val/date_min are never
accidentally reset to None when Claude modifies unrelated fields
- New donut few-shot example added
Library upgrades: anthropic 0.84→0.97, fastapi 0.135→0.136,
pandas 3.0.1→3.0.2, pydantic 2.12→2.13, uvicorn 0.41→0.46;
cairosvg removed, playwright 1.58.0 added.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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