dev-server

A command for starting a new Next.js development server, including handling occupied ports and leftover server processes. Next.js is a framework for building web applications with JavaScript or TypeScript.

In plain words
What is it for?
Running a Next.js project locally, detecting port conflicts, cleaning up existing processes, and optionally opening the project in a browser.
Why use it?
It reduces the manual work of finding a usable port and cleaning up old server state before local development.

Command for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/carmentacollective/carmenta/dev-server
Clone the repo
git clone --depth 1 https://github.com/carmentacollective/carmenta

Made for: Claude Code.

Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 881 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00022 $0.00881
Opus 5 $0.00011 $0.00441
Sonnet 5 $0.00004 $0.00176
Haiku 4.5 $0.00002 $0.00088

Measured 2d ago against content hash d80513fb2082, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

dev-server scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf .next

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s http://localhost:${PORT}/ > /dev/null
.claude/commands/dev-server.md · 135 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 135 lines · 22 tokens per session scan C d80513fb2082

Subscribe to this mod's changes

dev-server is a command published in the GitHub repository carmentacollective/carmenta (2 stars, last pushed 2mo ago), with no licence file. It adds 22 tokens to every session and 881 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 2 findings (recursive force delete, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.