valid | boolean | yes | True when the source has no errors. When false, nothing was drawn: fix the errors and call again. |
kind | string | null | yes | The diagram kind, or null when the header could not be read. |
errors | Diagnostic[] | yes | Every error found in one pass, each with line, column, and a hint. Empty when valid. |
errors[].code | "E100" | "E101" | "E110" | "E111" | "E120" | "E121" | "E122" | "E123" | "E124" | "E125" | "E130" | "E131" | "E132" | "E133" | "E134" | "E135" | "E136" | "E137" | "E138" | "E139" | "E140" | "W200" | "W201" | "W202" | "W203" | "W204" | "W205" | "W206" | "W207" | "W500" | "M100" | "M101" | "M102" | "M103" | "M104" | "M110" | "M200" | "M201" | "M202" | "M203" | "M204" | "M205" | "M206" | "M207" | "M208" | "M209" | "M210" | "M211" | "M212" | "M213" | "M214" | "M215" | "M216" | "M217" | "M218" | "E300" | "E301" | "E302" | "E303" | "E304" | "W300" | "W301" | "W302" | "W303" | "M120" | "M220" | "M221" | "M222" | "E340" | "E341" | "E342" | "E343" | "E344" | "E345" | "W320" | "W321" | "W322" | "W323" | "M240" | "M241" | "M242" | "E360" | "E361" | "E362" | "E363" | "E364" | "E365" | "E366" | "E367" | "W330" | "W331" | "W332" | "W333" | "W334" | "M250" | "M251" | "E400" | "E401" | "E402" | "E403" | "W350" | "W351" | "W352" | "W353" | "M270" | "M271" | "E420" | "E421" | "E422" | "E423" | "E424" | "W360" | "W361" | "W362" | "W363" | "W364" | "M180" | "M280" | "M281" | "M282" | "E320" | "E321" | "E322" | "E323" | "E324" | "E325" | "E326" | "E327" | "E328" | "E329" | "E330" | "W310" | "W311" | "W312" | "W313" | "W314" | "M130" | "M131" | "M132" | "M230" | "M231" | "M232" | "M233" | "M234" | "M235" | "M236" | "M237" | "M238" | "E380" | "E381" | "E382" | "E383" | "W340" | "W341" | "W342" | "W343" | "M260" | "I100" | "I101" | "I102" | "I103" | "I104" | "I105" | "I200" | "I201" | "I202" | "I203" | "I204" | "I206" | "R100" | "R101" | "R200" | "R201" | "R202" | "R203" | "R204" | "R205" | "R206" | "R207" | "S100" | "S200" | "S101" | "S102" | "S103" | "S104" | "S201" | "S202" | "S203" | yes | Stable code to branch on; E-codes are errors, W-codes are warnings. |
errors[].severity | "error" | "warning" | yes | Errors stop rendering; warnings never do. |
errors[].message | string | yes | What is wrong, in one sentence. |
errors[].line | integer | yes | 1-based line in the submitted source. minimum 1. |
errors[].column | integer | yes | 1-based column in that line. minimum 1. |
errors[].length | integer | yes | Number of characters the problem covers. minimum 1. |
errors[].hint | string | null | yes | A concrete suggestion for fixing it, or null. |
warnings | Diagnostic[] | yes | Quality warnings for a valid diagram: too dense, too wide, text cut, unconnected nodes, and suggestions for an icon or a group type. Empty when invalid. |
warnings[].code | "E100" | "E101" | "E110" | "E111" | "E120" | "E121" | "E122" | "E123" | "E124" | "E125" | "E130" | "E131" | "E132" | "E133" | "E134" | "E135" | "E136" | "E137" | "E138" | "E139" | "E140" | "W200" | "W201" | "W202" | "W203" | "W204" | "W205" | "W206" | "W207" | "W500" | "M100" | "M101" | "M102" | "M103" | "M104" | "M110" | "M200" | "M201" | "M202" | "M203" | "M204" | "M205" | "M206" | "M207" | "M208" | "M209" | "M210" | "M211" | "M212" | "M213" | "M214" | "M215" | "M216" | "M217" | "M218" | "E300" | "E301" | "E302" | "E303" | "E304" | "W300" | "W301" | "W302" | "W303" | "M120" | "M220" | "M221" | "M222" | "E340" | "E341" | "E342" | "E343" | "E344" | "E345" | "W320" | "W321" | "W322" | "W323" | "M240" | "M241" | "M242" | "E360" | "E361" | "E362" | "E363" | "E364" | "E365" | "E366" | "E367" | "W330" | "W331" | "W332" | "W333" | "W334" | "M250" | "M251" | "E400" | "E401" | "E402" | "E403" | "W350" | "W351" | "W352" | "W353" | "M270" | "M271" | "E420" | "E421" | "E422" | "E423" | "E424" | "W360" | "W361" | "W362" | "W363" | "W364" | "M180" | "M280" | "M281" | "M282" | "E320" | "E321" | "E322" | "E323" | "E324" | "E325" | "E326" | "E327" | "E328" | "E329" | "E330" | "W310" | "W311" | "W312" | "W313" | "W314" | "M130" | "M131" | "M132" | "M230" | "M231" | "M232" | "M233" | "M234" | "M235" | "M236" | "M237" | "M238" | "E380" | "E381" | "E382" | "E383" | "W340" | "W341" | "W342" | "W343" | "M260" | "I100" | "I101" | "I102" | "I103" | "I104" | "I105" | "I200" | "I201" | "I202" | "I203" | "I204" | "I206" | "R100" | "R101" | "R200" | "R201" | "R202" | "R203" | "R204" | "R205" | "R206" | "R207" | "S100" | "S200" | "S101" | "S102" | "S103" | "S104" | "S201" | "S202" | "S203" | yes | Stable code to branch on; E-codes are errors, W-codes are warnings. |
warnings[].severity | "error" | "warning" | yes | Errors stop rendering; warnings never do. |
warnings[].message | string | yes | What is wrong, in one sentence. |
warnings[].line | integer | yes | 1-based line in the submitted source. minimum 1. |
warnings[].column | integer | yes | 1-based column in that line. minimum 1. |
warnings[].length | integer | yes | Number of characters the problem covers. minimum 1. |
warnings[].hint | string | null | yes | A concrete suggestion for fixing it, or null. |
summary | string | null | yes | One-line description of the diagram, usable as alt text; null when invalid. |
outline | string[] | yes | The diagram as plain text in reading order, to check it says what you meant; empty when invalid. |
outlineTruncated | boolean | yes | True when the summary level cut the outline short. Call again with detail "full" to read all of it. |
size | Size | null | yes | Natural size of the laid-out diagram; null when invalid. |
quality | Quality | no | How clean the picture looks (score, grade, measures) and up to three changes that would help; read it instead of looking. Absent when invalid. |
quality.score | integer | yes | 0 to 100; 100 is a picture with nothing to fix. The same diagram always gets the same score. minimum 0; maximum 100. |
quality.grade | "clean" | "fair" | "cluttered" | yes | clean is 85 or more, fair 60 or more, cluttered below. |
quality.measures | object | yes | What the score is made from: crossings, lineOverBox, labelOverlaps, smallestTextPx (in an 880px column), aspectRatio, emptySpace (0 to 1), longestLine (px), detour (1 is straight), the counts of boxes, lines, labels, series, and slices, and any measure the kind adds. |
quality.hints | string[] | yes | Up to three changes, the one worth most first, each naming the statement or option to edit. |
quality.line | string | yes | The grade, the score, and the first hint in one line. |
notices | Note[] | no | Information notes, such as an icon alias drawn as the real icon; absent when there is none. |
notices[].code | string | yes | A stable code, such as I122 for an icon alias. |
notices[].severity | "info" | yes | A note never stops a drawing and is not a warning. |
notices[].message | string | yes | |
notices[].line | integer | yes | minimum 1. |
notices[].column | integer | yes | minimum 1. |
notices[].length | integer | yes | minimum 1. |
notices[].hint | string | null | yes | The text to write instead. |
renders | object[] | yes | One picture per requested color scheme, light first; empty when invalid, when svg is never, and when every picture was left out (see picturesOmitted). |
renders[].theme | "light" | "dark" | yes | The color scheme this picture is drawn in. |
renders[].svg | string | yes | Self-contained SVG markup with an accessible title and description. |
renders[].size | Size | yes | Natural size of a rendered diagram in px. |
renders[].size.width | integer | yes | Width in px. minimum 1. |
renders[].size.height | integer | yes | Height in px. minimum 1. |
picturesOmitted | object | no | Present only when pictures were left out because the answer would have been too big for an AI client to read in one piece. |
picturesOmitted.themes | ("light" | "dark")[] | yes | The color schemes whose pictures were left out. |
picturesOmitted.characters | integer | yes | How many characters the pictures left out came to. |
picturesOmitted.limit | integer | yes | The most characters one answer may hold before the pictures are left out. |
picturesOmitted.why | string | yes | Why they were left out, and what to do. |
viewUrl | string | no | A link that shows a valid diagram in a browser; give it to the person who wants to look. The source is in the part after #, never sent to a server, but anyone with the link can read it. Absent when too long; next says so. |
pngUrl | string | no | The viewUrl with &download=png: opening it in a browser saves the diagram as a PNG for Slack, email, or a wiki. The PNG is drawn in the person's browser, not on a server, so it is a link to open, not an image address to embed. Absent when too long. |
svgUrl | string | no | The viewUrl with &download=svg: a person opens it to download the SVG. Not a file address for curl; use saveCommand. Absent when too long. |
saveCommand | string | no | Run in a shell to save the SVG into the repository: the CLI decodes the link locally, fetches nothing, and embeds the source. Set --out to the path; add --theme dark for dark. Absent when too long. |
next | string | yes | The next step in one sentence. |