A guide for building and updating apps that connect ChatGPT with MCP tools and views. It covers planning, setup, implementation, debugging, local development, deployment, and connection to ChatGPT.

It is for brainstorming app ideas, creating projects, adding tools or views, running development servers, fixing issues, deploying, and connecting apps to ChatGPT.

It gives developers one path through the many steps involved in taking a ChatGPT or MCP app from an idea to a working deployment.

How rorygeddes/luni_mcp configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to rorygeddes/luni_mcp. 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/rorygeddes/luni_mcp/main/.agents/skills/skybridge/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/rorygeddes/luni_mcp

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/rorygeddes/luni_mcp/skybridge/github.svg)](https://agentmods.dev/skills/rorygeddes/luni_mcp/skybridge)

Your own site

<a href="https://agentmods.dev/skills/rorygeddes/luni_mcp/skybridge"><img src="https://agentmods.dev/badge/skills/rorygeddes/luni_mcp/skybridge/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/rorygeddes/luni_mcp/skybridge"><img src="https://agentmods.dev/badge/skills/rorygeddes/luni_mcp/skybridge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 679 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00076	$0.00679
Opus 5.5	$0.00030	$0.00272
Sonnet 5.5	$0.00015	$0.00136
Haiku 4.5	$0.00008	$0.00068

Measured 2mo ago against content hash 070f9d4346a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skybridge 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 2mo 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.

.agents/skills/skybridge/SKILL.md · 47 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

14 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.

2mo ago First seen · 47 lines · 76 tokens per session scan A 070f9d4346a8

Subscribe to this mod's changes

skybridge is a skill published in the GitHub repository rorygeddes/luni_mcp (0 stars, last pushed 5mo ago), with no licence file. It adds 76 tokens to every session and 679 once invoked, about $0.0003 per session on Opus 5.5. 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.

Building agents

skybridge next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
skybridgerorygeddes/luni_mcp	Skill	0	5mo ago	none	A	76	Claude Code, Codex
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	yesterday	MIT	A	200	Claude Code, Codex
playwright-climicrosoft/playwright	Skill	100k	yesterday	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	today	MIT	A	36	Claude Code
systematic-debuggingobra/superpowers	Skill	314k	4d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code

luni_mcp: Skill for Claude Code