prompt-library-for-startups

prompt-library-for-startups is a skill for Claude Code, Codex from awslabs/startups. It costs 218 tokens per session (2,424 once invoked), scanned A, original, Apache-2.0.

A searchable collection of AWS-curated copy-and-paste instructions for AI coding tools, plus some downloadable agents. It covers topics such as creating a first application, retrieval-augmented generation (answering from a document collection), security, costs, and AWS deployment.

In plain words
What is it for?
Finding prompts for MVP scaffolding, Bedrock-based chatbots, security reviews, cost checks, GPU quota requests, EKS deployments, and Well-Architected reviews, which assess an AWS workload against recommended practices.
Why use it?
It gives developers starting instructions for common AWS and AI tasks without requiring them to write every instruction from scratch. The index helps them find material by topic.

Skill for Claude CodeCodex ✓ vendor

Written for no agent in particular: nothing here depends on one. Also seen: mentions Claude Code.

Part of the aws-startup-advisor plugin — 9 skills, 6 agents, 1 hook, 4 MCP servers shipped together

Good fit Finding prompts for MVP scaffolding, Bedrock-based chatbots, security reviews, cost checks, GPU quota requests, EKS deployments, and Well-Architected reviews, which assess an AWS workload against recommended practices.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/awslabs/startups/prompt-library-for-startups
About the project

AWS Startups is an official AWS repository containing plugins, skills, tools, and other resources for people building startup products on Amazon Web Services. Its add-ons support startup-focused architecture, migration, and development work on AWS.

awslabs/startups · 17 stars · on GitHub

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 awslabs/startups --skill prompt-library-for-startups
Clone the repo
git clone --depth 1 https://github.com/awslabs/startups

Made for: Claude Code, Codex.

Or install aws-startup-advisor, the plugin that ships this one along with the rest of its 9 skills, 6 agents, 1 hook, 4 MCP servers.

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 prompt-library-for-startups

README.md
[![agentmods](https://agentmods.dev/badge/skills/awslabs/startups/prompt-library-for-startups/github.svg)](https://agentmods.dev/skills/awslabs/startups/prompt-library-for-startups)
Your own site
<a href="https://agentmods.dev/skills/awslabs/startups/prompt-library-for-startups"><img src="https://agentmods.dev/badge/skills/awslabs/startups/prompt-library-for-startups/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 prompt-library-for-startups

Your own site · 80×15
<a href="https://agentmods.dev/skills/awslabs/startups/prompt-library-for-startups"><img src="https://agentmods.dev/badge/skills/awslabs/startups/prompt-library-for-startups.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 218 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,424 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Prompt Injection · line 59
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium MCP Rug Pull · line 120
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
How audits are shown
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 $0.00218 $0.02424
Opus 5 $0.00109 $0.01212
Sonnet 5 $0.00044 $0.00485
Haiku 4.5 $0.00022 $0.00242

Measured 9d ago against content hash 26415e27a070, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

prompt-library-for-startups 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 9d 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.

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.

advisor/plugins/aws-startup-advisor/skills/prompt-library-for-startups/SKILL.md · 125 lines

How it starts

The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AWS Startups Prompt & Agent Library

Searchable index of AWS-curated prompts for AI coding tools (Kiro, Claude Code, Cursor, etc.) plus downloadable installable agents. Content is verbatim from aws.amazon.com/startups/prompt-library.

Last updated: 2026-07-22


Where to start

Open references/prompt-library.md — it's the index. Filter by the Keywords column (e.g., RAG, Security & Compliance, Cost Optimization, EKS, Beginner, Bedrock), then open the linked detail file under references/prompt-library/<slug>.md. Each detail file carries the full verbatim System Prompt plus a How to use? section where available.

The index has three sections:

  1. Prompts — searchable index — copy-paste prompts.
  2. Downloadable agents — installable agents that clone from a GitHub repo.
  3. Frequently Asked Questions — guidance on writing a good prompt, costs, safety, no-technical-background usage, monitoring.

Handing over a prompt — match the host context

You ARE already inside an AI coding agent (Claude Code / Kiro / Cursor / etc.). Don't tell the user to "paste this into your AI tool" — you ARE the AI tool.

When the user asks for a prompt:

  1. Read the index in references/prompt-library.md, filter by keyword, identify the matching slug.

  2. Open references/prompt-library/<slug>.md and read the full System Prompt.

  3. Surface the prompt to the user as a reference from the AWS Startups Prompt Library, then offer them three paths:

    "Here's the AWS Startups reference prompt for <task>. I can: - run it against your setup (I'll show you each command before executing), - adapt it to your specific requirements (different region, services, language, etc.), or - you can copy it as a starting point.

    How would you like to proceed?"

  4. Don't assume intent. Wait for the user's call (execute / adapt / copy) before acting.

Read the full file on GitHub · 125 lines

Files

What ships with it

30 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 125 lines · 218 tokens per session scan A 26415e27a070

Subscribe to this mod's changes

prompt-library-for-startups is a skill published in the GitHub repository awslabs/startups (17 stars, last pushed today), licensed Apache-2.0. It adds 218 tokens to every session and 2,424 once invoked, about $0.0011 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 2026-08-30.

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