Observed arrival · 2026-09-12

Sonar puts names on your localhost ports

trysonar.dev Observed source

Editorial interest 79/100 Selection signal · not a rating of the site

An open-source macOS and Linux tool that tracks local ports by project, worktree, and coding-agent session.

Landing page captured for the 2026-09-12 issue.

Field notes

The project organizes local development activity around ownership rather than treating ports as anonymous process numbers. Its example follows an EADDRINUSE failure on port 5173, then proposes views for ports, owners, agents, logs, and remote activity. The page identifies the release as v0.1.0-beta.2 and supplies a Homebrew command, while describing MCP access for coding agents as part of the workflow.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

One card from the complete issue

Radio Range Becomes Geography

352,465 arrived 1,000 judged 983 catalogued Enter the complete issue