Mist

Mist is the local DNS layer for Editor.Land. It resolves every *.editor.land domain to 127.0.0.1 so that all editor-internal service communication happens over loopback — no packet leaves the network interface for editor traffic.

Mist is implemented in Rust and in active development. The DNS server (Server.rs), zone resolver (Resolver.rs), zone authority (Zone.rs), forward security module (ForwardSecurity.rs), and integration tests are all confirmed present in the Mist repository.

The Problem Mist Solves

VS Code extensions, update checks, and telemetry endpoints all resolve against public DNS. Even with telemetry disabled, DNS queries can leak metadata about which extensions are installed and when the editor starts. There is no clean technical boundary between editor traffic and internet traffic.

Developers working on airgapped machines or behind strict firewalls face a different failure mode: DNS resolution hangs before timing out, and the editor stutters while waiting.

How Mist Works

Mist intercepts all DNS queries for the *.editor.land zone before they reach the system resolver. Every query resolves instantly to 127.0.0.1. The editor’s internal services communicate over loopback.

For domains outside the *.editor.land zone, Mist passes queries through to the system resolver unchanged. All other applications behave exactly as before.

Source Structure

Path	Role
`Source/Server.rs`	DNS server — listens for queries and dispatches to resolver (~5.8 KB)
`Source/Resolver.rs`	DNS resolver — zone lookup and response construction (~2 KB)
`Source/Zone.rs`	Zone authority — `*.editor.land` zone definitions (~3.5 KB)
`Source/ForwardSecurity.rs`	Forward security for pass-through queries (~1.2 KB)
`Source/lib.rs`	Crate root re-exports (~5.6 KB)
`tests/`	Integration tests

What Mist Enables

With Mist active, the editor starts and operates without any public DNS dependency. On airgapped machines, the editor works at full speed because it never waits for a DNS response from outside. On corporate networks, no outbound DNS traffic is visible from the editor process for editor-internal services.

Key Technologies

Rust, DNS-over-Loopback, Sandboxed Zone Resolution, Forward Security.