dev-server-manager

An agent that controls the development server, which is the local program used to run a website while it is being built.

In plain words
What is it for?
Use it to manage the local server needed for running and testing frontend work.
Why use it?
It removes the need to start, stop, and manage the server manually during frontend testing.

Agent

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 agents/hemangjoshi37a/claude-code-frontend-dev/dev-server-manager
Clone the repo
git clone --depth 1 https://github.com/hemangjoshi37a/claude-code-frontend-dev
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,453 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 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 $0.00012 $0.02453
Opus 5 $0.00006 $0.01226
Sonnet 5 $0.00002 $0.00491
Haiku 4.5 $0.00001 $0.00245

Measured 2d ago against content hash 8166244f6e18, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

dev-server-manager scanned grade B 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

3. Check if port requires sudo (ports < 1024)

Makes network callslowCapability

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

curl -s -o /dev/null -w "%{http_code}" http://localhost:5173
agents/dev-server-manager.md · 358 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 · 358 lines · 12 tokens per session scan B 8166244f6e18

Subscribe to this mod's changes

dev-server-manager is an agent published in the GitHub repository hemangjoshi37a/claude-code-frontend-dev (33 stars, last pushed 7mo ago), with no licence file. It adds 12 tokens to every session and 2,453 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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