openpencil/packages/docs/development/contributing.md
Danila Poyarkov 6545f20c53
Refactor architecture boundaries across core, app, and packages (#234)
* refactor(core): decompose editor factory and action modules

Split the monolithic editor factory and large action modules into focused
domain helpers:

- create.ts assembles context through bridge modules (clipboard,
  components, structure, undo) and delegates to graph-reads, graph-events,
  layout-runner, component-sync, and state factory
- structure.ts delegates to group, container-wrap, auto-layout-wrap,
  reorder, and state-toggle helpers
- selection.ts delegates to hit-test, overlays, container navigation,
  and read helpers
- clipboard.ts delegates to subtree-history, images, export, copy,
  fonts, and placement helpers
- shapes.ts delegates to pen actions and section-adopt
- components.ts delegates to focus and instances helpers
- alignment.ts delegates to flip-rotate helper
- text.ts uses explicit TextEditSession for snapshot comparison

New focused modules: nudge, variable-bindings, layout-mode,
page-viewports, tool-registry, color-space

Undo: history/position and history/snapshot helpers, hardened
batch/rollback with nested batch support and configurable limit

* refactor(core): split tool definitions by domain

Split the monolithic tool registry into domain-specific modules:

- read/ — selection, find, pages, fonts, components, nodes, query, jsx
- create/ — basic shapes, components, vector, JSX render
- modify/ — paint, effects, geometry, layout, state, text, update
- structure/ — basic, arrange, batch, hierarchy, replace, tree
- variables/ — bindings, collections, read, values
- vector/ — boolean, path, export, viewport
- analyze/ — colors, typography, spacing, clusters, diff, eval
- describe/ — summaries, tree, roles, layout-issues
- stock-photo/ — providers, requests, apply
- codegen/ — component-map, tokens

Split registry into core/extended tiers; refine schema and AI adapter

* refactor(core): restructure kiwi codec and instance overrides

Reorganize the Kiwi .fig codec into domain subdirectories:

- binary/ — codec, schema, protocol
- fig/ — file, import, parse (core, worker, transfer)
- node-change/ — convert, export-node, serialize, plugin-data
- instance-overrides/ — constraints, dsd, populate, props, resolve,
  symbol-overrides, symbol-props, sync, types

Vendored kiwi-schema/ left isolated

* refactor(core): split profiler, icons, IO, and add subpath exports

Profiler: speedscope-export, capture-session, hud-controller
Icons: api, svg, types, render, create-icons tool
IO: format registry and subpath exports
Canvas/color/text/vector: targeted cleanup

Add deliberate subpath exports: random, xpath, vector, color, canvas,
scene-graph, kiwi, design-jsx, io, tools, editor, layout, canvaskit,
profiler, text, lint, rpc, figma-api, constants

* refactor(vue): decompose canvas input, surface lifecycle, and controls

Canvas surface: gl-surface, kit-loader, render-loop, resize-observer

Canvas input handlers:
- move: drop-target, move-snap, duplicate-drag
- select: select-move, select-hover, select-hit
- resize: resize-rect, resize-vector, resize-start
- transform: rotation, marquee, pan, text-selection
- text-edit: navigation, clipboard, textarea lifecycle
- Shared: click-count, space-key, pan, pan-zoom, draw, raf-scheduler

Editor composition:
- commands split: actions, context, metadata, edit, selection, view
- menu-model split: command-groups, builders, types
- Gradient stop composable reuse in primitive root

Controls: fill, layout, typography, appearance, effects, stroke,
okhcl, prop-scrub, node-props, undo-batch, color-variable-binding
Variables/i18n/document/export helpers

Organize canvas, primitives, controls, editor, and variables into
cohesive module directories with package-local import aliases

Expose MenuActionNode/MenuSeparatorNode from public API

* refactor(app): split document IO, editor session, and automation bridge

Document IO: source-state, naming, writer, reload-source, reload-state,
imported-document, watch-targets, save-targets

Editor session: create, modules, types, accessors, computed, refs
Editor canvas: loader-overlay, collaboration-awareness,
context-selection, menu-actions, menu-model

Automation bridge: eval, tools, exports, files, selection, RPC fallback

AI/ACP: transport, map-update, permission, debug, chat effects/storage
Collab: awareness, graph-bindings, yjs-sync, follow, session, types
Shell keyboard: actions, bindings, clipboard, focus, nudging,
raw-events, registry, reserved, shortcuts, space-tool
Shell menu: app-menu, document-name, entry, files

Demo: colors, effects, helpers, section builders (components,
app-preview, effects, standalone, variables) — document.ts reduced
from 981 to 32 lines as pure orchestrator

Move app modules under src/app/ with organized domain structure:
editor, document, ai, collab, shell, automation, demo, tabs

* refactor(app): decompose UI components with provide/inject context

Split monolithic components using Reka UI-inspired namespace folders
with scoped provide/inject context — no prop drilling:

- CollabPanel/ — context, avatars, share, connected, join
- ColorPickerPanel/ — context, area, format, field groups, sliders
- MobileHud/ — context, action toast, tool badge, file menu, presence
- ProviderSettings/ — context, API key/type, endpoint, tokens, photos
- Toolbar/ — actions, types, desktop, mobile, tool button, flyout
- LayoutSection/ — types, auto-layout, flex, grid, padding, size, clip

Properties helpers: fill-okhcl adapter, fill-label, color-style-row
Menu: entry helpers, document-name rename, stale type removal

* refactor(mcp): split server into focused modules

- browser-rpc — WebSocket client management
- mcp-sessions — session lifecycle
- tool-output — response formatting
- tool-schema — Zod schema generation from ToolDefs
- jsx-preprocess — JSX source transformation
- result — result helpers
- tool-registration — MCP tool wiring
- auth — API key validation
- http-options — CORS/request handling
- stdio-bridge — stdio transport adapter

* refactor(cli): split analyze subcommands and shared helpers

- Analyze subcommands: clusters, colors, spacing, typography
- RPC data loading helper
- Migrate imports to targeted core subpath exports

* refactor(docs): split VitePress config and shared table component

Config helpers: sdk-sidebar, seo, labels, sidebars, locale-theme,
root-theme, locales

Shared SdkDataTable component replaces duplicated table markup in
SdkPropsTable, SdkEventsTable, and SdkSlotsTable

Update contributing and testing docs

* refactor(tauri): decompose desktop entrypoint

Split lib.rs into focused service modules:

- fig_container.rs — .fig archive/compression commands
- fonts.rs — font cache and system font enumeration
- menu.rs — native menu construction
- menu_events.rs — menu event dispatch and devtools toggle
- window.rs — main window show/focus lifecycle

* test: share domain test factories and migrate fixtures

New shared helpers:
- tests/helpers/scene.ts — makeSceneGraph factory
- tests/helpers/vector-network.ts — vertex/segment/network builders
- tests/helpers/fig-traversal.ts — all-node collection, type counts
- tests/helpers/undo.ts — undo test utilities
- tests/helpers/editor-history.ts — editor history test helpers

Migrate render, vector, fig-roundtrip, and undo tests to use shared
factories instead of inline fixture construction

* build: add structural lint rules, split vite config, update docs

Structural lint (oxlint.structure.json + lint/plugin.js):
- 20+ custom rules enforcing package boundaries, lifecycle patterns,
  naming conventions, and import discipline

Vite config split: raw-markdown, canvaskit-assets, pwa, server,
aliases, automation plugins

Remove legacy shims and utils superseded by SDK/core modules
Update AGENTS.md, CONTRIBUTING.md, eval-command docs, tsconfig

* fix(vue): normalize canvas directory casing and remove duplicate export

- Rename Canvas/ to canvas/ in git index to match #vue/canvas/* imports
  (PascalCase was correct for component primitives but canvas/ is a
  non-component domain directory)
- Remove duplicate ./random subpath export in core package.json

* fix: add #vue and #core Vite resolve aliases for dev server

* refactor(core): reduce remaining large modules

Split the remaining large core hotspots into cohesive domain modules while preserving public facades and behavior.

- Extract scene graph types, variables, node defaults, and vector-network helpers
- Decompose canvas renderer orchestration, state, paints, colors, lifecycle, labels, and delegated domain methods into renderer/ and labels/ subfolders
- Split Kiwi node-change, binary variable binding, layout, RPC, vector, JSX export, clipboard, design JSX, and Figma proxy helpers
- Replace collision-driven *Fn import aliases with namespace imports and enforce the pattern in lint

Validation:
- bun run check
- bun --filter @open-pencil/vue build
- bun run test:dupes

* fix(app): forward color input attrs

* fix(app): cover section drawing errors

* fix(editor): undo option-drag duplicates

* docs: document domain subfolder convention

* fix(app): handle undo redo on keydown

* refactor(app): dispatch shortcuts from keydown

* refactor: group prefixed domain modules

* refactor(app): use tinykeys for shortcuts

* refactor(core): group symbol override modules

* refactor(core): group fig kiwi container helper

* refactor(canvas): split overlay rendering modules

* refactor(vue): remove unused internal barrels

* fix(app): lay out demo components before instancing

* fix(app): restore demo badge spacing

* perf(canvas): split scene and overlay rendering

* refactor(vue): wrap wheel gesture lifecycle

* fix(canvas): wait for fonts before hiding loader

* docs: update unreleased changelog
2026-04-30 15:14:19 +03:00

3.8 KiB

Contributing

Project Structure

packages/
  core/              @open-pencil/core — engine (zero DOM deps)
    src/             Scene graph, renderer, layout, codec, kiwi, types
  cli/               @open-pencil/cli — headless CLI for .fig operations
    src/commands/    info, tree, find, export, eval, analyze
  mcp/               @open-pencil/mcp — MCP server for AI tools
    src/             stdio + HTTP (Hono) transports, 87 tools
src/
  components/        Vue SFCs (canvas, panels, toolbar, color picker)
    properties/      Property panel sections (Appearance, Fill, Stroke, etc.)
  composables/       Canvas input, keyboard shortcuts, rendering hooks
  stores/            Editor state (Vue reactivity)
  engine/            Re-export shims from @open-pencil/core
  kiwi/              Re-export shims from @open-pencil/core
  types.ts           Shared types (re-exported from core)
  constants.ts       UI colors, defaults, thresholds
desktop/             Tauri v2 (Rust + config)
tests/
  e2e/               Playwright visual regression
  engine/            Unit tests (bun:test)
docs/                VitePress documentation site

Development Setup

bun install
bun run dev          # Editor at localhost:1420
bun run docs:dev     # Docs at localhost:5173

Code Style

Tooling

Tool Command Purpose
oxlint bun run lint Linting (Rust-based, fast)
oxfmt bun run format Code formatting
tsgo bun run typecheck Type checking (Go-based TypeScript checker)

Run all checks:

bun run check

Conventions

  • File names — kebab-case (scene-graph.ts, use-canvas-input.ts)
  • Components — PascalCase Vue SFCs (EditorCanvas.vue, ScrubInput.vue)
  • Constants — SCREAMING_SNAKE_CASE
  • Functions/variables — camelCase
  • Types/interfaces — PascalCase

AI Agent Conventions

Developers and AI agents working on the codebase should read AGENTS.md in the repo root (view on GitHub). Covers rendering, scene graph, components & instances, layout, UI, file format, Tauri conventions, and known issues.

Making Changes

  1. Implement the change
  2. Run bun run check and bun run test
  3. Submit a pull request

Key Files

Core engine source lives in packages/core/src/. App-specific editor, document, AI, collaboration, shell, demo, and automation code lives under src/app/*; the Vue SDK owns reusable canvas/composable code under packages/vue/src/.

File Purpose
packages/core/src/scene-graph/ Scene graph: nodes, variables, instances, hit testing
packages/core/src/canvas/renderer.ts CanvasKit rendering pipeline
packages/core/src/layout.ts Yoga layout adapter
packages/core/src/scene-graph/undo.ts Undo/redo manager
packages/core/src/clipboard.ts Figma-compatible clipboard
packages/core/src/vector/ Vector network model
packages/core/src/io/formats/raster/render.ts Offscreen image export (PNG/JPG/WEBP)
packages/core/src/kiwi/binary/codec.ts Kiwi binary encoder/decoder
packages/core/src/kiwi/fig-import.ts .fig file import logic
packages/cli/src/index.ts CLI entry point
packages/core/src/tools/ Unified tool definitions split by domain (read, create, modify, structure, variables, vector, analyze)
packages/core/src/figma-api/ Figma Plugin API implementation
packages/mcp/src/server.ts MCP server factory
packages/cli/src/commands/ CLI commands (info, tree, find, export, eval, analyze)
src/app/editor/session/create.ts Editor session assembly
packages/vue/src/canvas/CanvasRoot.vue Canvas rendering composable
packages/vue/src/canvas/useCanvasInput.ts Mouse/touch input handling
src/app/shell/keyboard/use.ts Keyboard shortcut handling