project
JavaScript engine compiled to WebAssembly, adopted in v0.8.29 to evaluate workspace configuration files with separate intrinsics and heap.
Pi shipped MCP in v0.99.0 using a sandbox that keeps tool schemas out of context, where three servers took 143,000 of Perplexity's 200,000 tokens. Other harnesses can copy the design if they are willing to host an interpreter that runs model-written code.
Reality
Pi made MCP a core feature in version 0.99.0 on September 29, 2026, after its creator Mario Zechner spent over a year arguing against the protocol. In Pi, models call MCP tools from JavaScript in a QuickJS sandbox, so tool schemas are not preloaded into context.
Reality
The Run SDK swaps eval's ambient authority for a worker-thread sandbox with narrow host functions and resumable interrupts. The replay semantics are the part to read twice.
Reality
tauri-plugin-bare-kit embeds Holepunch's Bare runtime in Tauri apps, autolinks native addons across five targets, and reduces the Rust requirement to one line. The boundary is further in than that sounds.
Reality
ProjectDiscovery says an audit of Markdown Preview Enhanced turned an ordinary repository file into arbitrary file write. Editor extensions run with developer privileges and go uninventoried.
Reality