* perf(canvas): bitmap cache during zoom/pan, fix save for large files - Add canvas-zoom-cache: captures pixel snapshot on first viewport change, draws cached bitmap with transform delta (~0.1ms vs ~15ms per frame). Refreshes snapshot every 200ms during continuous interaction. - Integrate zoom cache into wheel zoom and space+drag panning. - Set renderOnAddRemove: false on Fabric canvas to avoid per-object renders. - Remove depth/size LOD from viewport culling (zoom cache handles perf). - Rewrite syncCanvasPositionsToStore: single tree walk + single store set instead of per-object updateNode (was O(n²) with 200+ history pushes). - Unify save/save-as: .op files save in-place, non-.op triggers save-as. - Add Electron filePath storage for reliable native IPC saves. - Add error handling with fallback for all save paths. * feat(canvas): integrate CanvasKit for enhanced rendering and layout - Added support for CanvasKit WASM to improve rendering performance and capabilities. - Introduced a new SkiaCanvas component for rendering using CanvasKit. - Implemented spatial indexing with RBush for efficient hit testing in the Skia engine. - Enhanced text measurement and layout handling using Canvas 2D for accurate word wrapping. - Updated layout engine to accommodate badge and overlay nodes without affecting layout flow. - Bumped version from 0.3.3 to 0.3.4 to reflect these significant changes. * fix(electron): add graceful-fs to devDependencies for Node.js v25 compat (#38) * feat(figma): enhance instance override handling and derived data processing - Added support for symbol tree context in instance conversion. - Improved the application of instance overrides by filtering derived data to exclude nested instances. - Implemented a two-strategy approach for resolving overrides and derived data, accommodating both direct index mapping and expanded DFS for nested instances. - Updated FigmaSymbolOverride interface to extend FigmaNodeChange, enhancing the handling of overridable node properties. * refactor(canvas): remove loading state and enhance error handling in SkiaCanvas - Eliminated the loading state management from SkiaCanvas, simplifying the component. - Updated error handling to directly display error messages without loading indicators. - Adjusted the EditorLayout to directly render SkiaCanvas without suspense, improving performance. - Introduced drag-and-drop file handling in the canvas store for better user experience. - Enhanced Figma import dialog to auto-process pending files from drag-and-drop. * fix(ai): improve error messages for API authentication and connection issues - Updated error hints in chat.ts to provide clearer instructions for API authentication, including running "claude login" or setting the ANTHROPIC_API_KEY in settings.json. - Enhanced friendly error messages in connect-agent.ts to guide users on authentication steps when encountering connection errors. - Refactored resolve-claude-agent-env.ts to improve environment variable normalization, allowing for better handling of ANTHROPIC_CUSTOM_HEADERS and ensuring proper serialization of object values. * refactor(env): streamline environment variable reading and enhance settings handling - Renamed and refactored the function for reading Claude settings to improve clarity and maintainability. - Introduced a new function to read settings from both `settings.json` and `settings.local.json`, ensuring local settings take precedence. - Updated test setup to use the system's temporary directory for security tests, enhancing compatibility across environments. * feat(ai): add fallback models for third-party API proxies in connect-agent - Introduced FALLBACK_CLAUDE_MODELS to provide default model options when supportedModels() fails, enhancing connectivity with third-party API proxies. - Updated error handling in connectClaudeCode to return fallback models on specific connection errors, ensuring users can still connect and select a model. * chore: bump version from 0.3.4 to 0.4.0 in package.json * feat(ai): enhance prompt handling for basic-tier models - Introduced logic to inline system prompts into user messages for basic-tier models (e.g., MiniMax, GLM) to ensure proper instruction visibility. - Updated design modification and orchestrator functions to accommodate this change, improving interaction with third-party routers. - Added a utility function to strip non-standard XML-like tags from AI responses, enhancing JSON extraction reliability. * fix(server): add ESM-compatible __dirname polyfill (#42) - Add fileURLToPath/dirname polyfill to mcp-install.ts - Add fileURLToPath/dirname polyfill to mcp-server-manager.ts Fixes browser version crash with "__dirname is not defined" Fixes MCP over HTTP transport failure since v3.3 Closes #37 * fix(server): make MCP HTTP server survive parent process lifecycle (#43) ## Problem The MCP HTTP server process died when: 1. User closed the Settings/Agent dialog in the UI 2. User interacted with the editor canvas 3. Nitro server hot-reloaded or restarted 4. Electron app sent SIGTERM to Nitro on window close This made the MCP server unusable for HTTP transport, requiring users to keep the settings dialog open constantly. ## Root Cause Analysis The MCP server was spawned as a regular child process without detached mode. This created several fatal dependencies: 1. **Signal propagation**: Lines 29-34 registered handlers for SIGINT, SIGTERM, SIGHUP that killed the MCP process when the parent received these signals (e.g., Electron closing Nitro) 2. **Parent-child lifecycle binding**: Without detached mode, the child process is tied to the parent's event loop. Any parent instability (hot reload, dialog closure causing microtasks, etc.) could affect the child 3. **In-memory process tracking**: The mcpProcess variable was stored in module memory, so Nitro restarts/hot-reloads would lose track of the running server ## Solution 1. **Detached spawn mode**: Use `detached: true` + `unref()` to make the MCP process completely independent of the parent 2. **PID file persistence**: Track the process via files in /tmp instead of in-memory variables, surviving parent restarts 3. **Remove signal handlers**: Delete the SIGINT/SIGTERM/SIGHUP handlers that were killing the MCP process 4. **Cross-platform kill**: Use process.kill() instead of execSync with taskkill for safer process termination ## Testing ### Test Case 1: Settings Dialog Close - Open OpenPencil → Settings → Start MCP HTTP Server - Close settings dialog - Reopen settings → MCP server still running ✅ ### Test Case 2: Editor Interaction - Start MCP HTTP Server - Draw on canvas, create shapes, use all tools - Check MCP server status → Still running ✅ ### Test Case 3: Browser Version - Run `npx vite --port 3000` - Start MCP from browser UI - Close tab, reopen → Server still running ✅ ### Test Case 4: Electron App - Start MCP from installed app - Close app window - Reopen app → Server still running (tracked via PID file) ✅ ### Test Case 5: Stop/Restart Cycle - Start → Stop → Start again - Works correctly ✅ ## Files Changed - server/utils/mcp-server-manager.ts - Complete rewrite with detached mode - server/api/ai/mcp-install.ts - Add ESM __dirname polyfill Fixes #37 Co-authored-by: Kayshen Xu <kayshen.xu@gmail.com> * fix(canvas): respect node-level theme overrides during variable resolution (#41) Previously, resolveNodeForCanvas was called with a single activeTheme for all nodes, ignoring any per-node theme property. This meant nodes with theme: {"Mode": "Light"} would still render using Dark mode colors. This fix merges each node's theme property with the default activeTheme, allowing individual nodes to override theme axes for proper themed variable resolution. Fixes design documents where some panels need different theme variants than the default (e.g., Light mode components in a Dark mode document). Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: Kayshen Xu <kayshen.xu@gmail.com> * feat(ai): enhance text processing by stripping tool call blocks - Added a new function to strip fake tool call blocks emitted by basic-tier models, ensuring cleaner JSON extraction. - Updated the existing text processing flow to incorporate this new function, improving the handling of non-standard model artifacts. - Modified orchestrator prompts to disallow function calls and tool call syntax in JSON outputs, enhancing response consistency. * fix(server): resolve merge conflict and clean up ESM __dirname polyfill - Removed merge conflict markers from mcp-install.ts and mcp-server-manager.ts. - Ensured consistent implementation of ESM-compatible __dirname polyfill across both files. * feat(ai): add node availability check and HTTP fallback for MCP server installation - Implemented a function to check for the availability of Node.js on the system, enhancing compatibility for environments without Node.js. - Added a fallback mechanism to install the MCP server using an HTTP URL when Node.js is not found, ensuring functionality remains intact. - Updated the installation response to include a flag indicating if the HTTP fallback was used, allowing the UI to reflect the server status accurately. - Enhanced the agent settings dialog to synchronize the MCP server status when the HTTP server is auto-started. * refactor(canvas): replace Fabric.js with CanvasKit/Skia for enhanced rendering performance - Removed Fabric.js dependencies and related code, transitioning to CanvasKit/Skia as the primary canvas engine. - Updated documentation and README files to reflect the new canvas technology. - Adjusted data flow and component interactions to accommodate the new rendering engine. - Ensured backward compatibility by retaining legacy Fabric.js files for specific utilities until full removal is feasible. * refactor(canvas): update layout engine and remove Fabric.js dependencies - Enhanced the canvas layout engine by integrating Skia and CanvasKit, replacing Fabric.js references. - Improved type safety by refining type assertions and imports across various components. - Added a new function to retrieve canvas dimensions, defaulting to 800x600 if no engine is mounted. - Removed obsolete rendering logic related to Fabric.js, streamlining the layout indicator functionality. - Updated multiple components to utilize the new canvas size retrieval method, ensuring consistent behavior across the application. * fix(figma): resolve multiple .fig import rendering issues - Fix layout properties in preserve mode: only apply auto-layout (gap, padding, justify, align) for frames with stackMode, use absolute positioning for non-auto-layout frames - Reverse children order for auto-layout frames in preserve mode to match Figma's layout flow order (tree builder sorts descending for z-stacking but layout needs ascending) - Fix instance inlining: always inline symbol content when instance has no local children, regardless of override/derived data presence - Fix derived data mapping: use direct GUID matching (Strategy 0) when derived guidPath GUIDs are actual symbol node GUIDs, preventing the off-by-one size/transform misassignment from index-based mapping - Add styleIdForFill/styleIdForStrokeFill resolution: resolve fill style references to inline paints before tree building, fixing missing fills on 448+ nodes including active menu items and styled elements - Fix collectImageBlobs to detect JPEG/GIF/WebP in addition to PNG - Fix instance override application: apply overrides even when derived data is absent * fix(figma): skip opacity=0 nodes during import to fix breadcrumb visibility Nodes with opacity <= 0 are now skipped in convertChildren, along with all their descendants. This fixes the breadcrumb "Page / Page / Page" text showing through despite the parent items having opacity=0, since the Skia renderer does not propagate parent opacity to child nodes. * fix(figma): resolve styleIdForFill in instance override entries Style references (styleIdForFill, styleIdForStrokeFill) inside symbolOverrides were not being resolved to inline paints. This caused text nodes in overridden instances (e.g. "All Products" card on blue background) to retain the symbol's default colors instead of the instance-specific white fills. The resolveStyleReferences pre-processing step now iterates into each node's symbolData.symbolOverrides array and resolves style references there as well. * fix(figma): apply icon colors and fix arc rendering in .fig import - Fix donut chart missing segment: swap start/end angles when endingAngle < startingAngle instead of adding 2π, producing correct clockwise arc equivalents for counter-clockwise Figma arcs - Fix icon stroke thickness: scale strokeWeight proportionally in scaleTreeChildren, applyInstanceOverrides derived sizing, and convertVector for Lucide icons rendered smaller than 24×24 - Fix nested instance color overrides: build nestedOverrideMap from multi-guid override paths (e.g. instanceGuid/childGuid) and inject child-scoped overrides into nested INSTANCE symbolOverrides, enabling Dashboard Summary Card icons to receive white/blue stroke colors - Fix override-only instances: when derivedSymbolData is empty but symbolOverrides exist (e.g. sidebar icon instances with stroke color overrides but no size changes), fall through to direct GUID matching so stroke paints are correctly applied - Include strokePaints in hasVisualOverrides check so instances with stroke-only overrides are properly inlined with their symbol children * feat(canvas): add vector text rendering with bundled fonts for Figma import Replace bitmap text fallback with CanvasKit Paragraph API for true vector text rendering. Bundle 11 popular font families locally via @fontsource packages to ensure reliable rendering in regions where Google Fonts CDN is unavailable. Key changes: - SkiaFontManager: local-first font loading with Google Fonts fallback - Paragraph API rendering with caching, styled segments, and alignment - Fixed-width text tolerance to prevent unwanted line wrapping from font metric differences between Figma and CanvasKit - Auto-width text manual alignment offset (center/right) to avoid infinite layout width issues - Figma text mapper: support RAW lineHeight units - Figma import dialog: pre-load fonts after conversion * fix(canvas): align text centering with CanvasKit and improve font fallback - Replace Fabric.js FONT_SIZE_MULT (1.13) with actual paragraph height (fontSize * lineHeight) for cross-axis text centering, fixing icon vertical misalignment in horizontal layouts - Remove Fabric-specific optical correction (getTextOpticalCenterYOffset) since CanvasKit halfLeading handles this correctly - Add font fallback chain with separate Inter Ext family for latin-ext glyph coverage (₦ U+20A6 etc.) - Cache failed font loads to prevent repeated fetch attempts per frame - Skip Google Fonts requests for known system/proprietary fonts (PingFang SC, Microsoft YaHei, D-DIN-PRO, etc.) * fix(figma): recursive nested instance expansion and CJK font support - Fix 3 bugs in applyInstanceOverrides() that broke deeply nested Figma component instances (6+ levels): propagate multi-guid derivedSymbolData to nested instances, resolve virtual GUIDs via pkToNodeGuid map, and build nestedDerivedMap alongside nestedOverrideMap for recursive expansion - Bundle Noto Sans SC (chinese-simplified + latin subsets, 400/700 weights) for offline CJK vector text rendering without Google Fonts dependency - Add Noto Sans SC to font fallback chain for CJK glyph coverage - Add China CDN mirror (fonts.font.im) as fallback when Google Fonts is inaccessible, with 4s timeout on primary CDN - Increase .fig file size limits to 150MB compressed / 300MB decompressed * fix(canvas): enhance CJK font support and pre-load Noto Sans SC - Update SkiaEngine to pre-load Noto Sans SC alongside Inter for improved CJK glyph coverage in the font fallback chain, preventing rendering issues with system fonts. - Modify FigmaImportDialog to ensure Noto Sans SC is included when primary fonts are system fonts, ensuring proper rendering of CJK text. * refactor(figma): optimize instance override handling with full DFS strategy - Replace hybrid skip-INSTANCE and expanded DFS with a unified full DFS approach for handling all node types, including INSTANCE nodes. - Update the mapping logic to ensure correct localID assignments and improve the handling of overflow entries during instance expansion. - Enhance the overall structure and readability of the applyInstanceOverrides function by consolidating the traversal methods. * refactor(figma): improve layout mapping and instance override logic - Enhance the mapFigmaLayout function to conditionally set gap based on stackSpacing and justifyContent, ensuring compatibility with Figma's layout behavior. - Simplify the applyInstanceOverrides function by removing redundant logic and focusing on a unified full DFS approach for node mapping, improving clarity and performance. - Ensure derivedSymbolData is correctly replaced with nested data from outer instances, preventing incorrect merging of entries. * refactor(figma): enhance instance override logic with root-inclusive DFS - Introduce a root-inclusive depth-first search (DFS) to accurately detect and skip overrides targeting the symbol root during instance processing. - Update the applyInstanceOverrides function to improve clarity and performance by refining the handling of derived data and overrides. - Ensure that overrides targeting the root are excluded from child nodes, preventing incorrect application of overrides in nested instances. --------- Co-authored-by: Fini <fini.yang@gmail.com> Co-authored-by: Related8919 <191752213+Related8919@users.noreply.github.com> Co-authored-by: Hrijul Dey <44521405+hr1juldey@users.noreply.github.com> Co-authored-by: Claude <noreply@anthropic.com>
12 KiB
OpenPencil
A primeira ferramenta de design vetorial open-source nativa com IA do mundo.
Equipes de Agentes Concorrentes • Design-as-Code • Servidor MCP Integrado • Inteligência Multi-modelo
English · 简体中文 · 繁體中文 · 日本語 · 한국어 · Français · Español · Deutsch · Português · Русский · हिन्दी · Türkçe · ไทย · Tiếng Việt · Bahasa Indonesia
Clique na imagem para assistir ao vídeo de demonstração
Por que OpenPencil
🎨 Prompt → CanvasDescreva qualquer UI em linguagem natural. Veja-a aparecer no canvas infinito em tempo real com animação de streaming. Modifique designs existentes selecionando elementos e conversando. |
🤖 Equipes de Agentes ConcorrentesO orquestrador decompõe páginas complexas em sub-tarefas espaciais. Vários agentes de IA trabalham em diferentes seções simultaneamente — hero, features, footer — tudo em streaming paralelo. |
🧠 Inteligência Multi-ModeloAdapta-se automaticamente às capacidades de cada modelo. Claude recebe prompts completos com thinking; GPT-4o/Gemini desativam thinking; modelos menores (MiniMax, Qwen, Llama) recebem prompts simplificados para saída confiável. |
🔌 Servidor MCPInstalação com um clique no Claude Code, Codex, Gemini, OpenCode, Kiro ou Copilot CLIs. Faça design pelo seu terminal — leia, crie e modifique arquivos |
📦 Design-as-CodeArquivos |
🖥️ Roda em Qualquer LugarApp web + desktop nativo no macOS, Windows e Linux via Electron. Atualização automática a partir do GitHub Releases. Associação de arquivos |
Início Rápido
# Instalar dependências
bun install
# Iniciar servidor de desenvolvimento em http://localhost:3000
bun --bun run dev
Ou executar como aplicativo desktop:
bun run electron:dev
Design Nativo com IA
Do Prompt à UI
- Texto para design — descreva uma página e ela será gerada no canvas em tempo real com animação de streaming
- Orquestrador — decompõe páginas complexas em sub-tarefas espaciais para geração paralela
- Modificação de design — selecione elementos e descreva as alterações em linguagem natural
- Entrada de visão — anexe capturas de tela ou mockups para design baseado em referência
Suporte Multi-Agente
| Agente | Configuração |
|---|---|
| Claude Code | Sem configuração — usa o Claude Agent SDK com OAuth local |
| Codex CLI | Conectar nas Configurações do Agente (Cmd+,) |
| OpenCode | Conectar nas Configurações do Agente (Cmd+,) |
| GitHub Copilot | copilot login e depois conectar nas Configurações do Agente (Cmd+,) |
Perfis de Capacidade de Modelo — adapta automaticamente prompts, modo de thinking e timeouts por nível de modelo. Modelos de nível completo (Claude) recebem prompts completos; nível padrão (GPT-4o, Gemini, DeepSeek) desativam thinking; nível básico (MiniMax, Qwen, Llama, Mistral) recebem prompts simplificados de JSON aninhado para máxima confiabilidade.
Servidor MCP
- Servidor MCP integrado — instalação com um clique no Claude Code / Codex / Gemini / OpenCode / Kiro / Copilot CLIs
- Detecção automática de Node.js — se não instalado, recurso automático para transporte HTTP e início automático do servidor MCP HTTP
- Automação de design pelo terminal: leia, crie e modifique arquivos
.opvia qualquer agente compatível com MCP - Fluxo de design em camadas —
design_skeleton→design_content→design_refinepara designs multi-seção de maior fidelidade - Recuperação segmentada de prompts — carregue apenas o conhecimento de design necessário (schema, layout, roles, icons, planning, etc.)
- Suporte a múltiplas páginas — crie, renomeie, reordene e duplique páginas via ferramentas MCP
Geração de Código
- React + Tailwind CSS, HTML + CSS, CSS Variables
- Vue, Svelte, Flutter, SwiftUI, Jetpack Compose, React Native
Funcionalidades
Canvas e Desenho
- Canvas infinito com pan, zoom, guias de alinhamento inteligentes e snapping
- Retângulo, Elipse, Linha, Polígono, Caneta (Bezier), Frame, Texto
- Operações booleanas — união, subtração, interseção com barra de ferramentas contextual
- Seletor de ícones (Iconify) e importação de imagens (PNG/JPEG/SVG/WebP/GIF)
- Auto-layout — vertical/horizontal com gap, padding, justify, align
- Documentos com múltiplas páginas e navegação por abas
Sistema de Design
- Variáveis de design — tokens de cor, número e string com referências
$variable - Suporte a múltiplos temas — vários eixos, cada um com variantes (Claro/Escuro, Compacto/Confortável)
- Sistema de componentes — componentes reutilizáveis com instâncias e substituições
- Sincronização CSS — propriedades personalizadas geradas automaticamente,
var(--name)na saída de código
Importação do Figma
- Importe arquivos
.figpreservando layout, preenchimentos, traços, efeitos, texto, imagens e vetores
Aplicativo Desktop
- macOS, Windows e Linux nativos via Electron
- Associação de arquivos
.op— clique duplo para abrir, bloqueio de instância única - Atualização automática a partir do GitHub Releases
- Menu de aplicativo nativo e diálogos de arquivo
Stack Tecnológica
| Frontend | React 19 · TanStack Start · Tailwind CSS v4 · shadcn/ui |
| Canvas | CanvasKit/Skia (WASM, acelerado por GPU) |
| Estado | Zustand v5 |
| Servidor | Nitro |
| Desktop | Electron 35 |
| IA | Anthropic SDK · Claude Agent SDK · OpenCode SDK · Copilot SDK |
| Runtime | Bun · Vite 7 |
| Formato de arquivo | .op — baseado em JSON, legível por humanos, compatível com Git |
Estrutura do Projeto
src/
canvas/ Motor CanvasKit/Skia — desenho, sincronização, layout, guias, ferramenta caneta
components/ UI React — editor, painéis, diálogos compartilhados, ícones
services/ai/ Chat IA, orquestrador, geração de design, streaming
services/figma/ Pipeline de importação binária do Figma .fig
services/codegen Geradores de código React+Tailwind e HTML+CSS
stores/ Zustand — canvas, documento, páginas, histórico, IA, configurações
variables/ Resolução de tokens de design e gerenciamento de referências
mcp/ Ferramentas do servidor MCP para integração com CLI externo
uikit/ Sistema de kit de componentes reutilizáveis
server/
api/ai/ API Nitro — chat em streaming, geração, validação
utils/ Wrappers de cliente Claude CLI, OpenCode, Codex, Copilot
electron/
main.ts Janela, fork do Nitro, menu nativo, atualizador automático
preload.ts Ponte IPC
Atalhos de Teclado
| Tecla | Ação | Tecla | Ação | |
|---|---|---|---|---|
V |
Selecionar | Cmd+S |
Salvar | |
R |
Retângulo | Cmd+Z |
Desfazer | |
O |
Elipse | Cmd+Shift+Z |
Refazer | |
L |
Linha | Cmd+C/X/V/D |
Copiar/Recortar/Colar/Duplicar | |
T |
Texto | Cmd+G |
Agrupar | |
F |
Frame | Cmd+Shift+G |
Desagrupar | |
P |
Ferramenta caneta | Cmd+Shift+E |
Exportar | |
H |
Mão (pan) | Cmd+Shift+C |
Painel de código | |
Del |
Excluir | Cmd+Shift+V |
Painel de variáveis | |
[ / ] |
Reordenar | Cmd+J |
Chat IA | |
| Setas | Mover 1px | Cmd+, |
Configurações do agente | |
Cmd+Alt+U |
União booleana | Cmd+Alt+S |
Subtração booleana | |
Cmd+Alt+I |
Interseção booleana |
Scripts
bun --bun run dev # Servidor de desenvolvimento (porta 3000)
bun --bun run build # Build de produção
bun --bun run test # Executar testes (Vitest)
npx tsc --noEmit # Verificação de tipos
bun run electron:dev # Desenvolvimento com Electron
bun run electron:build # Empacotamento do Electron
Contribuindo
Contribuições são bem-vindas! Consulte o CLAUDE.md para detalhes de arquitetura e estilo de código.
- Faça fork e clone
- Crie uma branch:
git checkout -b feat/my-feature - Execute as verificações:
npx tsc --noEmit && bun --bun run test - Faça commit com Conventional Commits:
feat(canvas): add rotation snapping - Abra um PR contra
main
Roadmap
- Variáveis de design e tokens com sincronização CSS
- Sistema de componentes (instâncias e substituições)
- Geração de design com IA e orquestrador
- Integração com servidor MCP e fluxo de design em camadas
- Suporte a múltiplas páginas
- Importação do Figma
.fig - Operações booleanas (união, subtração, interseção)
- Perfis de capacidade multi-modelo
- Edição colaborativa
- Sistema de plugins
Contribuidores
Comunidade
Star History
Licença
MIT — Copyright (c) 2026 ZSeven-W