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openpencil/packages/core
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Danila Poyarkov 1dfd501d83
feat: name the call and list every problem in validation errors (#911) 
* feat: name the call and list every problem in validation errors

Tool arguments were checked with v.parse, whose error names only the first problem and neither the tool nor the argument, so a model that sent a wrong create_shape call read 'Expected string but received 42'. Tool arguments in Core, which AI chat, MCP, the CLI, and WebMCP all reach, the automation bridge's file commands, design JSX component properties, and gradient stops now throw a heading that names the call followed by v.summarize, which lists each issue with its path. parseToolArgs is exported for the app's own parses of tool arguments.

* test(design-jsx): pass a deliberately wrong property value through the types

The test checks what a script sees for a non-string instance property, which the Instance types reject at compile time.

* docs: say that MCP clients get the MCP SDK's validation report

The MCP SDK validates tool arguments against the registered schema before OpenPencil's handler runs, so an MCP client already received every problem with its path and does not see parseToolArgs' message.
2026-10-05 14:06:26 +00:00
..
assets
src feat: name the call and list every problem in validation errors (#911) 2026-10-05 14:06:26 +00:00
tests feat: name the call and list every problem in validation errors (#911) 2026-10-05 14:06:26 +00:00
AGENTS.md fix(core): draw gradient and image strokes as the paint they are (#868) 2026-10-04 13:25:45 +00:00
package.json feat(scene-graph)!: let a SceneGraph take its ID generator (#887) 2026-10-05 08:21:22 +00:00
README.md docs: route contributors through per-domain guides and ship npm license text (#785) 2026-09-29 01:02:06 +04:00
tsconfig.json fix: explain unsupported browsers instead of a blank window (#745) 2026-09-22 14:40:59 +04:00
tsconfig.test.json test(core): move the editor suite into the package (#792) 2026-09-30 10:22:42 +04:00
tsdown.config.ts fix(figma-api): validate effects like Figma (#794) 2026-09-30 21:18:20 +04:00

README.md

@open-pencil/core

Editor engine for OpenPencil: the CanvasKit (Skia WASM) renderer, Yoga layout, the framework-agnostic editor with undo and selection, the Figma Plugin API compatibility layer, the AI/MCP tool definitions, clipboard and vector conversion, and format-neutral document I/O.

It depends on @open-pencil/scene-graph, @open-pencil/pen, @open-pencil/kiwi, and @open-pencil/fig, and keeps browser DOM out so it runs in the app, the CLI, the MCP server, and headless scripts alike.

Import the root barrel or the targeted subpaths listed in package.json exports, for example @open-pencil/core/io, @open-pencil/core/geometry, and @open-pencil/core/canvaskit.

MIT License.