llms-full.txt@apps/web/public git:20261019.8e49964A

Immutable. This exact content never changes and is served at /api/v1/blob/3fe921b4a1eb93c5.

# markvis (full)

Quantitative Markdown charts. Path: fence | GFM | HTML comment → parser → Chart IR → SVG + table fallback.

## Grammar

1. Optional `markvis: 2`
2. CORE headers: `type`, `title`, `theme`, `palette`, `surface`, `unit`, `x`, `y`, `series`
3. Type-local encodings when legal: `layout`, `innerRadius`, `min`, `max`, `orient`, `role`, `target`
4. Blank line
5. CSV or GFM table with a header row

Language tags `chart`, `markvis`, `vis` share one parser.

## Types (CORE)

| type | notes |
| --- | --- |
| bar | keep row order; optional `layout`; optional `orient: horizontal` |
| line | multi-series via `series`; keep row order; optional `layout`; empty y is a gap |
| area | same order rule as line; optional `layout`; empty y is a gap |
| scatter | numeric x and y; repeated rows stay |
| pie | values ≥ 0; do not normalize to 100; optional `innerRadius`; empty y is E_MISSING_VALUE |
| hist | continuous x; table keeps raw rows; repeated samples stay |
| heatmap | x cat × series cat, y intensity; long form; series required; empty y is missing, not zero |
| funnel | x stage, y ≥ 0; centered bands narrow from each value to the next; label to the right; series ignored |
| waterfall | x step, y signed delta; optional `role` column; totals are not inferred from the label |
| radar | x spoke, y ≥ 0; optional series; one shared scale; missing spoke is a gap |
| gauge | one row (a second row is E_DUP_KEY); omit max → 100; series ignored |
| sankey | x source, series target (required), y flow ≥ 0; one thickness scale; a cycle is E_SANKEY_CYCLE |
| treemap | x label, y ≥ 0; optional series parent; two levels max |
| dumbbell | x category, y number; series required with exactly two values; first hollow, second filled; missing value is a gap |
| bullet | x label, y actual; optional `target` column; optional `min` / `max`; series ignored |
| boxplot | x category, y one observation per row; optional series; type-7 quartiles; under five values shows points |
| calendar | x YYYY-MM-DD date, y number; one row per day; optional `min` / `max`; bad date is E_BAD_DATE |

## Encodings

| field | legal on | values | omit |
| --- | --- | --- | --- |
| layout | bar line area | grouped \| stacked \| percent | grouped |
| innerRadius | pie | [0, 1] | theme PIE_INNER_RATIO (explicit 0 = solid) |
| min | gauge, heatmap, bullet, calendar | number | gauge 0; heatmap and calendar data min; bullet min(0, data) |
| max | gauge, heatmap, radar, bullet, calendar | number | gauge 100; heatmap and calendar data max; radar data max; bullet data max |
| orient | bar | horizontal \| vertical | vertical |
| role | waterfall | column of delta \| total \| subtotal | every row is a delta |
| target | bullet | column of numbers | no target marker |

Wrong type / bad value → E_UNKNOWN_FIELD + table. Do not invent donut, stacked-bar, sunburst, or chord type ids. Gauge with both min and max set requires min < max.

`surface` optional: `light` (default, no canvas fill) | `dark` | `export`. Dark and export paint their own paper.

## Errors (stable codes)

E_UNKNOWN_TYPE, E_TYPE_TYPO, E_JSON_DATA, E_MISSING_HEADER, E_EMPTY_DATA, E_EXTRA_COLUMN, E_DUP_COLUMN, E_UNKNOWN_FIELD, E_PIE_NEGATIVE, E_NEGATIVE_VALUE, E_YAML_TABLE_CONFLICT, E_EMPTY_FENCE, E_UNKNOWN_THEME, E_UNKNOWN_PALETTE, E_BAD_VERSION, E_BAD_NUMBER, E_MISSING_VALUE, E_DUP_KEY, E_SANKEY_CYCLE, E_BAD_DATE.

Optional `theme:` grammar pack: folio|highcharts|shadcn|docs|ant|recharts|graphite (default folio).
Optional `palette:` color table: ink|porcelain|warm|cool|vivid (omit → theme default colors). Theme ≠ palette.

Invalid → table + one-line error. Never drop recovered rows.

## Examples

See examples/valid/01–08 (canonical) and SPEC.md. Natural-language → fence: examples/prompts.md.

## Product boundaries

No chart runtimes in core. No JSON-as-default data. Do not invent donut / sunburst / chord / stacked-bar as type ids. Structure diagrams stay outside this language. The catalog is the seventeen types in the table above. See docs/TYPES.md.