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Hacathan_5: Skill for Claude Code

.claude/skills/building-chatgpt-apps/SKILL.md

building-chatgpt-apps is a skill for Claude Code from AbdullahMalik17/Hacathan_5. It costs 87 tokens per session (3,157 once invoked), scanned A, original, no licence file.

A guide for creating ChatGPT Apps with interactive widgets using the OpenAI Apps SDK and MCP servers. MCP servers provide the app’s connection to tools or data.

In plain words
What is it for?
Use it to create embedded widgets, set up the MCP server, pass response metadata, and build ChatGPT Apps in Developer Mode.
Why use it?
It explains how to build visual, interactive experiences inside ChatGPT instead of text-only responses.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is AbdullahMalik17/Hacathan_5's own configuration. It tells Claude Code how to work on Hacathan_5 itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Hacathan_5 configures →

not rated 9repo 8mo ago A scan 87 tokens no licence
View source ↗ AbdullahMalik17/Hacathan_5 hacathan5-4qk9qwxii-muhammad-abdullah-athars-projects.vercel.app
Reuse

Borrowing it

Nothing to install: this file belongs to AbdullahMalik17/Hacathan_5. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/AbdullahMalik17/Hacathan_5/main/.claude/skills/building-chatgpt-apps/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/AbdullahMalik17/Hacathan_5

Made for: Claude Code.

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 building-chatgpt-apps

README.md
[![agentmods](https://agentmods.dev/badge/skills/abdullahmalik17/hacathan_5/building-chatgpt-apps/github.svg)](https://agentmods.dev/skills/abdullahmalik17/hacathan_5/building-chatgpt-apps)
Your own site
<a href="https://agentmods.dev/skills/abdullahmalik17/hacathan_5/building-chatgpt-apps"><img src="https://agentmods.dev/badge/skills/abdullahmalik17/hacathan_5/building-chatgpt-apps/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 building-chatgpt-apps

Your own site · 80×15
<a href="https://agentmods.dev/skills/abdullahmalik17/hacathan_5/building-chatgpt-apps"><img src="https://agentmods.dev/badge/skills/abdullahmalik17/hacathan_5/building-chatgpt-apps.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 87 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,157 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00087 $0.03157
Opus 5.5 $0.00035 $0.01263
Sonnet 5.5 $0.00017 $0.00631
Haiku 4.5 $0.00009 $0.00316

Measured 2mo ago against content hash b8aff5d8b7f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

building-chatgpt-apps scanned grade A 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 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/verify.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.

Makes network callslowCapability

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

2. Verify ngrok tunnel is active: `curl https://your-url.ngrok-free.app/mcp`
.claude/skills/building-chatgpt-apps/SKILL.md · 504 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

Files

What ships with it

5 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. 2mo ago First seen · 504 lines · 87 tokens per session scan A b8aff5d8b7f8

Subscribe to this mod's changes

building-chatgpt-apps is a skill published in the GitHub repository AbdullahMalik17/Hacathan_5 (9 stars, last pushed 8mo ago), with no licence file. It adds 87 tokens to every session and 3,157 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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