upstage-builder

upstage-builder is a skill for Claude Code from UpstageAI/upstage-extensions-hub. It costs 145 tokens per session (2,786 once invoked), scanned A, original, MIT.

A guide for building applications and services with Upstage's Solar language models, embeddings, and document APIs. It covers agents, retrieval-augmented generation (RAG), pipelines, and web services.

In plain words
What is it for?
Use it to scaffold or deploy Upstage-based agents, RAG systems, pipelines, and web apps, including projects intended for Vercel.
Why use it?
It provides the project setup and delivery guidance needed when an application depends on Upstage, including environment variables and deployment choices.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: built for openclaw.

Part of the upstage-ai plugin — 9 skills shipped together

Good fit Use it to scaffold or deploy Upstage-based agents, RAG systems, pipelines, and web apps, including projects intended for Vercel.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/upstageai/upstage-extensions-hub/upstage-builder
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.

Any agent
npx skills add UpstageAI/upstage-extensions-hub --skill upstage-builder
Clone the repo
git clone --depth 1 https://github.com/UpstageAI/upstage-extensions-hub

Made for: Claude Code.

Or install upstage-ai, the plugin that ships this one along with the rest of its 9 skills.

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 upstage-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/upstageai/upstage-extensions-hub/upstage-builder/github.svg)](https://agentmods.dev/skills/upstageai/upstage-extensions-hub/upstage-builder)
Your own site
<a href="https://agentmods.dev/skills/upstageai/upstage-extensions-hub/upstage-builder"><img src="https://agentmods.dev/badge/skills/upstageai/upstage-extensions-hub/upstage-builder/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for upstage-builder

Your own site · 80×15
<a href="https://agentmods.dev/skills/upstageai/upstage-extensions-hub/upstage-builder"><img src="https://agentmods.dev/badge/skills/upstageai/upstage-extensions-hub/upstage-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 145 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,786 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00145 $0.02786
Opus 5 $0.00072 $0.01393
Sonnet 5 $0.00029 $0.00557
Haiku 4.5 $0.00015 $0.00279

Measured 11d ago against content hash 4d027d9df883, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

upstage-builder scanned grade A with 0 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 11d ago.

The scan reads SKILL.md. This mod also ships 6 executable files (examples/chat-example.py, examples/document-example.py, examples/rag-example.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/upstage-builder/SKILL.md · 249 lines

How it starts

The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.

upstage-builder — Upstage API and Webapp Delivery Skill

You are an expert at generating code that uses the Upstage API (api.upstage.ai). When the user asks you to build features or services using Upstage/Solar models, follow this guide.

For full webapp requests, do not stop at code generation. Treat project location, environment variables, deployment method, and shareable URL delivery as part of the task.

Webapp Setup Rules

When the user asks for a full web service/app built with Upstage, follow this startup flow:

  1. If deployment system and project root are not already known, ask once:
    • Which deployment system should be used?
    • Which project root should be used?
  2. If defaults are already configured, use them.
  3. For this installation, default to:
    • project root: /data/.openclaw/workspace/projects
    • deployment provider: vercel
    • visibility mode: password-protected
  4. Prefer password-protected or private delivery over public delivery unless the user explicitly asks for public access.
  5. Create one folder per app under the configured project root.
  6. Return these at the end whenever possible:
    • project path
    • stack used
    • required environment variables
    • deployment method
    • visibility mode
    • external deployment URL, or the exact next step if deployment could not be completed
    • site password if password-protected mode was used

Read references/webapp-workflow.md for the full project/deployment workflow.

Quick Start

Upstage APIs are OpenAI SDK compatible. Just change base_url:

from openai import OpenAI
import os

client = OpenAI(
    api_key=os.environ["UPSTAGE_API_KEY"],
    base_url="https://api.upstage.ai/v1"
)

response = client.chat.completions.create(
    model="solar-pro3",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

API Key: Always use os.environ["UPSTAGE_API_KEY"]. Never hardcode keys. Users get their key from console.upstage.ai.

Read the full file on GitHub · 249 lines

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. 11d ago First seen · 249 lines · 145 tokens per session scan A 4d027d9df883

Subscribe to this mod's changes

upstage-builder is a skill published in the GitHub repository UpstageAI/upstage-extensions-hub (10 stars, last pushed 4mo ago), licensed MIT. It adds 145 tokens to every session and 2,786 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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