Plasmate

About Plasmate

Plasmate is an Apache-2.0 browser engine written in Rust and designed for agents rather than people. Its central idea is the Semantic Object Model, a projection of the DOM that keeps structure, content and interactive elements while discarding the styling, layout, accessibility attributes, event handlers and rendering state that exist to serve a human viewport. The project is careful to say this is not lossy compression but a different representation for a different consumer, and it is unusually disciplined about the claim: byte-reduction figures are presented as supporting evidence rather than as a token, cost, latency or task-success promise, benchmark results retain every attempted input and state the exact successful-sample denominator, and the public-web evidence set publishes its blocked and failed URLs alongside the successful ones. Alongside the engine is the Agent Web Protocol, a deliberately small wire format whose foundational v0.1 core has seven methods — hello, session create and close, page navigate, observe and act — against the several hundred in the Chrome DevTools Protocol, most of which exist for human-driven debugging and profiling. Release gates cover fixture contracts and supervised MCP sessions exercising actions, traces, replay refusal and failure containment. Plasmate is a W3C Community Group member and publishes MCP Registry metadata; current build is v0.6.0.

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