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The MCP server read one line, ran it and answered it before reading the next, so notifications/cancelled was never seen during a call and every request (even ping) waited behind a running export. - vectorcraft_doc::cancel: a thread-local cancel token and progress sink that long work polls. Checkpoints: PDF pages, PDF flattening, geometry bake, raster-effect flattening, drawing objects, raster artboards, and before any file is written. A cancelled command returns EngineError::Cancelled and changes nothing. - Server::serve reads on its own thread: notifications/cancelled drops a queued request or stops the running one (no reply, as the MCP spec says), engine-free requests (ping, the list methods, prompts/get) are answered at once, a request that would wait behind a call running for 2 s is refused with -32003 naming that call, and _meta.progressToken gets notifications/progress (page n of m). Queue and output are bounded. - The remote backend stops waiting for the app when the call is cancelled. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
72 lines
1.9 KiB
Rust
72 lines
1.9 KiB
Rust
//! VectorCraft's MCP server.
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//!
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//! [Model Context Protocol](https://modelcontextprotocol.io) over stdio: newline-delimited
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//! JSON-RPC 2.0, hand-written (no async runtime). The server exposes VectorCraft as a set of MCP
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//! tools and resources and forwards everything to a [`Backend`]:
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//!
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//! - [`Remote`] talks to a running desktop app through its loopback JSON-lines control channel
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//! (`vectorcraft --control 7979`): one `{"id","method","params"}` line in, one
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//! `{"id","ok","result"|"error"}` line out.
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//! - [`Headless`] hosts an in-process [`vectorcraft_engine::Session`] and implements the same
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//! control-channel method names itself (rendering screenshots with `vectorcraft-render`), so agents
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//! can draw and look at the result without a window.
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//!
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//! Entry points: [`Server::serve`] (stdio loop) and [`Server::handle_line`] (one message).
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#![forbid(unsafe_code)]
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mod backend;
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mod headless;
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mod intake;
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pub mod logging;
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mod prompts;
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mod resources;
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mod server;
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mod tools;
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pub use backend::{Backend, Remote};
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pub use headless::Headless;
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pub use prompts::{PROMPTS, PromptArg, PromptDef};
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pub use resources::{DOC_JSON_URI, DOC_URI, TEMPLATES};
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pub use server::{PROTOCOL_VERSION, Server};
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pub use tools::{ToolResult, call_tool, tool_definitions};
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/// Default control-channel address of the desktop app.
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pub const DEFAULT_ADDR: &str = "127.0.0.1:7979";
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#[cfg(test)]
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mod tests;
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#[cfg(test)]
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mod tests_batchdraw;
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#[cfg(test)]
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mod tests_concurrency;
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#[cfg(test)]
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mod tests_conventions;
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#[cfg(test)]
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mod tests_distortkeys;
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#[cfg(test)]
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mod tests_drawopts;
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#[cfg(test)]
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mod tests_exportas;
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#[cfg(test)]
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mod tests_fileio;
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#[cfg(test)]
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mod tests_freeform;
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#[cfg(test)]
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mod tests_gradient;
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#[cfg(test)]
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mod tests_limits;
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#[cfg(test)]
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mod tests_links;
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#[cfg(test)]
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mod tests_liquify;
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#[cfg(test)]
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mod tests_pen;
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#[cfg(test)]
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mod tests_persp;
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#[cfg(test)]
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mod tests_place;
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#[cfg(test)]
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mod tests_protocol;
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#[cfg(test)]
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mod tests_svg;
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