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Pure Go mosh. Client and server. Wire-compatible with the standard C mosh implementation.

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Pure Go mosh client, server, and WASM build for the browser

Name: Pure Go mosh client, server, and WASM build for the browser
Availability: InStock
Author: rasengan

by rasengan·Apr 5, 2026·1 point·1 comment

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AI Analysis

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Pure Go mosh with WASM build running in browser terminals at unixshells.com.

Strengths

•Zero CGO dependencies—pure Go client and server with full protocol implementation
•Wire-compatible with C mosh, tested against reference implementation both ways
•WASM compilation enables instant web terminals with predictive local echo

Weaknesses

•Niche audience—most users just need the existing C mosh binary
•Only 2 GitHub stars suggests limited community adoption so far

Post Description

Go implementation of mosh (mobile shell) both client and server and wire-compatible with the core C implementation.

The full mosh protocol is implemented including but not limited to AES-128-OCB3, SSP transport with sequencing and retransmission, datagram fragmentation, protobuf state sync, local echo prediction, etc.

It compiles to WASM, which is how we run mosh in the browser at UnixShells.com (WebTransport (HTTP/3) carries the datagrams instead of UDP). This is how things feel instant, despite being wherever you are.

https://github.com/unixshells/mosh-go