Harbormaster
ChatGPT pluginInspect local ports in Codex
Harbormaster runs in a local Codex task on the computer you want to inspect. It maps listening ports to their processes and projects, flags reservation collisions, records vanished services, and safely stops one explicitly selected process. Hosted ChatGPT cannot access your computer's process table.
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- No
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Movement
From our daily snapshots over the last 30 days.
Rank by placement
Rank in Developer tools
In its category
How this plugin compares with others in the same category. Positions are counted within the category, not across the whole directory.
Developer tools433rd of 751 by placement
| # | Plugin | Position | 7d |
|---|---|---|---|
| 431 | #5126 | 18places up | |
| 432 | #5128 | 53places down | |
| 433 | #5131 | 8places up | |
| 434 | #5136 | 22places up | |
| 435 | #5147 | 14places up |
More from Dimitri Stefanopoulos
All listings by Dimitri StefanopoulosExample prompts
- “In Codex, show me what is using my local ports.”
- “In Codex, who owns port 3000?”
- “In Codex, why did my dev server disappear?”
Skills
harbormaster
Diagnose local port collisions, identify the project or process holding a port, reserve ports, inspect service history, or safely free exactly one explicitly authorized local listener. Use for localhost conflicts, vanished dev servers, port ownership, reservations, and anti-killall process control.
- Categories
- Made by
- Dimitri Stefanopoulos · Website
- Sign-in
- On Install
- Capabilities
- Codex-local port intelligence, Collision prevention, Safe process control
- Availability
- Available
- Version
- 0.1.2
- Keywords
- ports, localhost, developer-tools, processes, diagnostics, dev-server
- Created
- August 25, 2026
- More info
- Sponsorship
- Promote this plugin