Like an unset axis, a cleared maximum was written as 0 and could
collapse the layer (CodeRabbit review on #1152).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Checked by importing synthetic files into the incumbent (Drafts > Import,
black-box) and against a "Save local copy" of a synthetic document.
- Images are named and referenced by the SHA-1 of their bytes. With
SHA-256 names, any file with an image failed to import ("Internal error
during import").
- Component sets hold their property definitions, variant properties
included (stateGroupPropertyValueOrders); each variant has its own copy
of each definition (parentPropDefId) and its variantPropSpecs, and its
layers and instances name that copy. Definitions and values also travel
as varValue; text values carry their lines; layers get componentPropRefs
next to the parameter consumption map. Before, sets came in without
variant properties and with their other properties unbound.
- An axis without a maximum size is written as infinite: 0 collapsed
auto layout frames with only a maximum width.
- Compound weights are spelt the way font families name their faces
("SemiBold"; "Semi Bold" in Inter): text in Libre Franklin Semi Bold was
a missing font there and wasn't drawn.
- The kiwi encoder writes infinite floats.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
An auto layout frame a .fig records no primary-axis sizing for hugs on
that axis (auto layout sized it by its content before that axis could be
fixed) instead of turning fixed; an instance that records no auto layout
takes its main's; REST frames whose sizing modes are left out hug (the
documented default); text hugs by its resize mode (auto width both axes,
auto height its height) instead of coming in fixed.
Figma stores where a numbered list starts counting on each text line
(listStartOffset; a list shown as "2." has offset 1). The import dropped
it, so every list counted from 1.
A paragraph's list settings now carry a start number (written only when
set, so older files open and save unchanged). Numbering counts on from
it where a list starts; items that go on counting ignore it. The .fig
import reads it, the .fig export writes it on a list's first line, and
plain paragraphs drop it. Toggling a list off ignores differing starts.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Instances write what they change from their main as an override addressed by the
main's id (size, name, paints), what follows from that for their layers as derived
data (size, place, outline, colours their variables give), and a scale factor when
they were scaled as a whole; layers of a nested instance swapped for another
component keep their overrides. Variable collections, modes and variables are nodes
on a hidden page; paints, gradient stops, effects, layout grids and layer fields
name the variables bound to them, and frames and pages the modes they set. Shared
styles are nodes there too, linked from the layers that use them. Variable-width
strokes say their reach on each side of the path. The import reads all of it back
(style definitions and unused styles, variable order and scopes, bindings on paint
lists, stops, effects and grids, page modes, text bindings, width profiles).
An experimental, best-effort `.fig` export, so work done in FigCraft can be handed back as a `.fig` file. It is written from the same public format write-ups the importer uses and is the inverse of the importer's mapping. Only round trips through FigCraft's own importer are verified; other apps may not open every file.
- **Encoder** (`crates/format/src/fig/kiwi.rs`): the kiwi encoder that test fixtures used is now shipped code. It never panics and checks every value against the schema: unknown fields or enum names, missing struct fields, wrong types, out-of-range numbers and non-finite floats are errors, and NULs inside strings are dropped. Varints and floats are written exactly the way the decoder reads them. `Schema::parse` reads the compact text schema form, and the importer's tests use it too.
- **Writer** (`crates/format/src/fig/export.rs`): writes the zip (`canvas.fig`, `meta.json`, `thumbnail.png`, `images/<hash>`). `canvas.fig` holds the fig-kiwi header, then a raw-deflate binary schema and a raw-deflate message (flate2's pure-Rust backend, already in the tree; no new dependencies). The schema covers only the fields we write. The canvas, images, blobs, node count and nesting depth are capped, and floats are made finite before they are written.
- **Mapping:** pages; frames, groups, sections, rectangles, ellipses (arcs), polygons, stars, lines and vectors (vector network blobs with per-point radius, mirroring and caps, plus fill outlines); text with styled runs (UTF-16 indexed) and list types; slices; boolean groups; solid, gradient and image paints (image bytes included); strokes; effects; corners; constraints; masks; auto layout, including grids with tracks and cells; child layout; layout grids; export settings; components, component sets and their properties. Instances are written as their main plus the fields their layers change, by id path. This covers nested instances and swaps, and fields the main sets but the instance clears. Prototype interactions (triggers, navigation and overlay actions, transitions, easing), scrolling and flow starts are included. Everything skipped is reported in a warnings list: style links, variables, comments, Dev Mode data, plugin data, guides, slots, brush and width-profile strokes, pattern fills, image adjustments, variable and conditional actions, and more.
- **Import fixes found by the round trips** (`map.rs`): ellipse arcs, boolean operation types and component set descriptions are now read. Durations are read as whole milliseconds, because seconds stored as 32-bit floats used to truncate by 1 ms.
- **File writes:** a failed write no longer leaves its `.tmp-figcraft` file behind. The junk-parameter sweep found this.
- **Commands and UI:**
- `file.export {format: "fig"}`, or any path ending in `.fig`, writes the whole file and returns `warnings`. Without a path it returns base64 `data`.
- File > Export... has a new "The whole file" section with a ".fig (experimental)" row. A note under it says other apps may not open every exported file. After export, a toast reports how many kinds of content were left out.
- `figcraft-cli export --format fig` (or `-o x.fig`) and `convert` to `.fig` print the warnings as `note:` lines.
- MCP's `export` accepts `format: "fig"` and passes the warnings through.
- New UI strings have English and Spanish entries.
- **Docs:** file-format-parity.md has a new export section covering what is written, what is skipped, and that only round trips through our own importer are verified. Also updated: mcp.md, cli.md, gaps.md (gap 1), target-app-parity.md and ROADMAP.md. Grading is kept low. Import/export goes to 86%/58% and file formats to 60%. The file-exchange discount stays at x0.85, because nothing shows that another app opens these files.
