fullstack-builder

fullstack-builder is an agent for Claude Code from AshokNaik009/ashknk-marketplace. It costs 16 tokens per session (922 once invoked), scanned B, original, no licence file.

A specialised coding agent for building and maintaining full-stack applications, which include both a web interface and a server, using FastAPI and React.

In plain words
What is it for?
Developing and maintaining applications with FastAPI on the backend and React on the frontend.
Why use it?
It assigns work to an agent familiar with the project's main technologies instead of treating every task as generic coding.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the fullstack-ai-boilerplate plugin — 1 command, 1 agent shipped together

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/ashoknaik009/ashknk-marketplace/fullstack-builder
Clone the repo
git clone --depth 1 https://github.com/AshokNaik009/ashknk-marketplace

Made for: Claude Code.

Or install fullstack-ai-boilerplate, the plugin that ships this one along with the rest of its 1 command, 1 agent.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for fullstack-builder

README.md
[![agentmods](https://agentmods.dev/badge/agents/ashoknaik009/ashknk-marketplace/fullstack-builder.svg)](https://agentmods.dev/agents/ashoknaik009/ashknk-marketplace/fullstack-builder)
Your own site
<a href="https://agentmods.dev/agents/ashoknaik009/ashknk-marketplace/fullstack-builder"><img src="https://agentmods.dev/badge/agents/ashoknaik009/ashknk-marketplace/fullstack-builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 922 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 5.1 $0.00016 $0.00922
Opus 5 $0.00008 $0.00461
Sonnet 5 $0.00003 $0.00184
Haiku 4.5 $0.00002 $0.00092

Measured 5d ago against content hash b9dc80b25de3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade B, and why

fullstack-builder scanned grade B with 1 finding 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 5d 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.

Unrestricted tool accessmediumExcessive agency

A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.

tools: ['*']
fullstack-ai-boilerplate/agents/fullstack-builder.md · 144 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. 5d ago First seen · 144 lines · 16 tokens per session scan B b9dc80b25de3

Subscribe to this mod's changes

fullstack-builder is an agent published in the GitHub repository AshokNaik009/ashknk-marketplace (5 stars, last pushed 10mo ago), with no licence file. It adds 16 tokens to every session and 922 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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