io-figma

name

io-figma

description

Guides work on the Figma I/O package (@grida/io-figma, packages/grida-canvas-io-figma/). Covers the fig-kiwi binary parser, Kiwi→REST→Grida conversion pipeline, fig2grida CLI, REST API JSON conversion, and testing with clipboard/fig/REST fixtures. Use when adding node type support, fixing conversion bugs, extending fig2grida, working on the fig-kiwi parser, writing tests for Figma import, or debugging clipboard paste failures after a Figma update.

Figma I/O — @grida/io-figma

Package: packages/grida-canvas-io-figma/

Architecture

.fig bytes / HTML clipboard
  → fig-kiwi parser       (fig-kiwi/)          low-level, zero-opinion
  → NodeChange[]          (Kiwi schema types)
  → iofigma.fromKiwi*()   (lib.ts)              Kiwi → Grida node

Figma REST API JSON
  → iofigma.fromRest*()   (lib.ts)              REST → Grida node

Orchestration:
  fig2grida-core.ts       — browser-safe: input detection, page loop, pack
  fig2grida.ts            — CLI wrapper (Node.js only, uses fs + process.argv)

Key invariant: The Kiwi path converts to REST format first (Kiwi → REST → Grida). lib.ts is the single source of truth for node conversion; it does not know the input origin.

Output: Grida format (.grida ZIP — FlatBuffers + images). See io-grida skill for format details, Rust loading, and round-trip testing.

fig2grida Input Formats

fig2grida(input) in fig2grida-core.ts auto-detects the input:

Input	Detection	Path
.fig bytes	ZIP without document.json, or raw Kiwi	fig-kiwi parser
REST archive ZIP	ZIP containing document.json (+ optional images/)	REST JSON path
REST JSON bytes	Starts with {	REST JSON path
REST JSON object	Non-Uint8Array object	REST JSON path

The REST JSON path (extractCanvases) accepts multiple response shapes:

• { document: { type: "DOCUMENT", children: [CANVAS, …] } } — full GET /v1/files/:key
• { document: { type: "CANVAS", children: […] } } — single-page node fetch
• { nodes: { "id": { document: … }, … } } — GET /v1/files/:key/nodes?ids=…
• { type: "DOCUMENT", children: … } — document node directly
• { type: "CANVAS", children: … } — single CANVAS node
• { children: […] } — bare object with children

Public APIs (both in fig2grida-core.ts):

• fig2grida(input, options?) → .grida ZIP bytes (Fig2GridaResult)
• restJsonToGridaDocument(json, options?) → in-memory Document + assets (no ZIP packing)

Key Files

File	Role
lib.ts	All iofigma.from* converters (Kiwi→REST and REST→Grida)
fig2grida-core.ts	Orchestrator (.fig, REST JSON, REST ZIP)
fig2grida.ts	CLI entry point (Node.js only)
fig-kiwi/index.ts	Low-level parser public API
fig-kiwi/blob-parser.ts	Vector network + commands blob decoding
fig-kiwi/schema.ts	Kiwi type definitions (NodeChange, Message, …)

References

Path	What
.ref/figma/	Kiwi schema (fig.kiwi, fig.kiwi.d.ts), extraction tool (fig2kiwi.ts), Figma REST & Plugin API typings
docs/wg/feat-fig/glossary/fig.kiwi.md	Deep-dive: node types, vector blob format, GROUP/FRAME detection, text/font mapping
packages/grida-canvas-io-figma/README.md	Feature matrix, limitations, usage

Common Tasks

Add support for a new Figma property

1. Find the property in fig-kiwi/schema.ts (Kiwi) or REST JSON in fixtures/test-figma/.
2. Add mapping in lib.ts under the relevant iofigma.from* converter.
3. Add a test in __tests__/ against an existing fixture.

Debug a clipboard paste failure

Clipboard issues = Figma changed their Kiwi schema.

1. Save the failing HTML clipboard as a fixture.
2. Run readHTMLMessage(html) → inspect raw Message.
3. Diff parsed NodeChange[] against fig-kiwi/schema.ts.
4. Update schema.ts (field changes) or blob-parser.ts (blob layout changes).

Run fig2grida

pnpm --filter @grida/io-figma fig2grida input.fig
npx tsx packages/grida-canvas-io-figma/fig2grida.ts input.fig --pages 0,2
npx tsx packages/grida-canvas-io-figma/fig2grida.ts input.fig --info

Figma API token

figma_archive.py requires a Figma Personal Access Token. The script checks FIGMA_TOKEN then X_FIGMA_TOKEN env vars, or accepts --x-figma-token on the CLI. It fails fast with a clear error if none is set.

The root .env file is not a standard part of this project — it may not exist on every machine. Never read .env directly (for security reasons). Instead, if a token is needed and not already in the environment, ask the user to provide one and have them export it:

export FIGMA_TOKEN=figd_...

Create REST API fixtures

Use scripts/figma_archive.py. See the script header for full documentation, output layout, and --export behaviour.

python .agents/skills/io-figma/scripts/figma_archive.py \
  --filekey <KEY> --archive-dir fixtures/test-figma/community/<name>

# With oracle PNGs (nodes must have export presets in Figma)
python .agents/skills/io-figma/scripts/figma_archive.py \
  --filekey <KEY> --archive-dir fixtures/test-figma/rest-api/local/<name> --export

Refig — correctness testing against Figma's renderer

For end-to-end correctness of the Figma import pipeline (does our Grida render of a Figma file match Figma's own render?), use the refig flow: oracle PNGs from Figma's Images API + @grida/reftest (developed in the engine repo: https://github.com/gridaco/nothing/tree/main/packages/grida-reftest) for the diff/score/report. Suites live in the engine repo's gitignored local corpus (fixtures/local/refig/<name>.<filekey>/ — local-only, machine-local by definition). See the engine repo's render-reftest skill, section "Figma — the refig reftest pipeline": https://github.com/gridaco/nothing/blob/main/.agents/skills/render-reftest/SKILL.md.

When debugging a conversion bug with a visible visual symptom, run the refig suite to locate the diverging nodes, then drill into lib.ts for the specific node type or property.

Tests

pnpm --filter @grida/io-figma test                              # all
pnpm --filter @grida/io-figma test -- __tests__/iofigma.kiwi.test.ts  # specific

Test file	Covers
iofigma.kiwi.test.ts	Kiwi clipboard → Grida
iofigma.kiwi.fig.test.ts	.fig file parsing
iofigma.kiwi.vector-network.test.ts	Vector network blob decoding
iofigma.kiwi.clipboard-overrides.test.ts	Component instance overrides
iofigma.kiwi.clipboard-components.test.ts	Component / instance clipboard
iofigma.kiwi.clipboard-text-overrides.test.ts	Text style overrides
iofigma.rest-api.no-geometry.test.ts	REST API (no geometry)
iofigma.rest-api.vector.test.ts	REST API vector paths
fig2grida.test.ts	End-to-end pipeline
fig-kiwi/__tests__/	Low-level parser units

Fixtures: fixtures/test-figma/rest-api/ (committed REST JSON), fixtures/test-figma/community/ (archived files), fixtures/local/ (gitignored, manual testing).

Known Limitations

• Component sets, FigJam nodes (STICKY, CONNECTOR, TABLE) not supported
• characterStyleOverrides / styleOverrideTable partially mapped from Kiwi
• Style/variable bindings not preserved
• Kiwi is undocumented — can break after Figma updates

Check the README's limitations section before writing new code. If lifting a limitation, update the README.

Verification

pnpm turbo typecheck --filter='./packages/grida-canvas-io-figma'
pnpm turbo test --filter='./packages/grida-canvas-io-figma'