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asnar00
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py-stop-local

Stop a local Flask server on port 8080 using PID file or lsof.

1|Updated Jul 31, 2025
Search Tags:#process management#cleanup#server#Python#stop#local development#Flask
One-click install
npx skills add https://github.com/asnar00/miso --skill py-stop-local
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: py-stop-local
Source: https://github.com/asnar00/miso/tree/main/.claude/skills/py-stop-local
Command: npx skills add https://github.com/asnar00/miso --skill py-stop-local

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill provides a reliable way to stop a locally running Flask server, preventing "address already in use" errors and ensuring a clean shutdown. It automates the process of identifying and terminating the server process, saving you from manual lsof and kill commands.

Core Features & Use Cases

  • Clean Server Termination: Stops Flask servers running on port 8080, whether they were started in foreground or background mode.
  • Multiple Stop Methods: Utilizes a dedicated stop.sh script, lsof for process identification, or Ctrl+C for flexibility.
  • Use Case: Before restarting your Flask server with new code, use this skill to ensure the previous instance is fully shut down, avoiding port conflicts and ensuring a fresh start.

Quick Start

Stop the local Python Flask server.

Frequently Asked Questions about py-stop-local

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I stop a Flask server running on port 8080?▼

Stop a Flask server on port 8080 by using the provided stop.sh script, which terminates the process via PID file or lsof command. This prevents address-already-in-use errors and ensures clean shutdown for both foreground and background instances on macOS or Linux.

What causes 'address already in use' errors with Flask servers?▼

Address-already-in-use errors occur when a Flask server process remains running on port 8080 after shutdown. Gracefully stopping the previous instance clears the port and allows a fresh server start without conflicts.

Can I stop a Flask server if I don't have a PID file?▼

Yes, the Skill uses lsof to identify the Flask process on port 8080 when a server.pid file isn't available, providing fallback process identification on macOS and Linux environments.

How do I cleanly restart a Flask development server?▼

Before restarting Flask with new code, use this Skill to fully shut down the previous instance. Clean termination prevents port conflicts and ensures your updated code runs in a fresh environment.

Does this work for Flask servers running in the background?▼

Yes, this Skill handles both foreground and background Flask server instances on port 8080, using stop.sh automation or manual port-based termination for graceful shutdown in either mode.

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