ibrews/ue5-mcp

"name": "ibrews"   },   "repository": "https://github.com/ibrews/ue5-mcp",

},   "repository": "https://github.com/ibrews/ue5-mcp",   "license": "MIT",

"repository": "https://github.com/ibrews/ue5-mcp",

**[Try Blueprint Reader in your browser →](https://ibrews.github.io/ue5-mcp/)** No installation or account. Paste raw text, add files, reopen a saved session, or import a BlueprintUE link automatically. Parsing stays in your browser; link i

[![Watch the 42-second Blueprint Reader trailer: real Blueprint nodes, the Claude story, a link import, and a compact brief.](docs/assets/blueprint-reader-trailer-poster.jpg)](https://ibrews.github.io/ue5-mcp/trailer/)

**[Watch the 42-second trailer](https://ibrews.github.io/ue5-mcp/trailer/)** · A visual story of overload → compact brief → focused understanding. Clarifying captions and original music; works muted. [Transcript and production notes](docs/t

The illustration shows the workflow. The numbers come from [this public graph](https://blueprintue.com/blueprint/6v52d8no/), checked with reader 0.2.2. The brief summarizes and omits detail; a saved session retains the original source for f

[Open the live reader](https://ibrews.github.io/ue5-mcp/) · [Install the agent skill](skills/blueprint-reader/README.md#1-install-once) · [Share the reader](docs/blueprint-reader-launch.md)

git clone https://github.com/ibrews/ue5-mcp.git

| Client | First prompt | |---|---| | Codex | `Use $blueprint-reader to explain https://blueprintue.com/blueprint/6v52d8no/ and identify missing context.` |

|---|---| | Codex | `Use $blueprint-reader to explain https://blueprintue.com/blueprint/6v52d8no/ and identify missing context.` | | Claude Code | `/blueprint-reader Explain https://blueprintue.com/blueprint/6v52d8no/ and identify missing c

| Codex | `Use $blueprint-reader to explain https://blueprintue.com/blueprint/6v52d8no/ and identify missing context.` |

| Claude Code | `/blueprint-reader Explain https://blueprintue.com/blueprint/6v52d8no/ and identify missing context.` |

git clone https://github.com/ibrews/ue5-mcp.git ~/.claude/skills/ue5-mcp

1. [Download this repo as a ZIP](https://github.com/ibrews/ue5-mcp/archive/refs/heads/main.zip)

- Unreal Engine 5.x (this skill covers 5.7 and 5.8 specifically; most content applies to earlier and later versions) - An MCP server exposing UE5 functionality. Options:   - **[Epic's official `ModelContextProtocol` plugin](https://dev.epic

- An MCP server exposing UE5 functionality. Options:   - **[Epic's official `ModelContextProtocol` plugin](https://dev.epicgames.com/documentation/en-us/unreal-engine)** — experimental, ships with UE 5.8, requires a source build of the engi

- **[Epic's official `ModelContextProtocol` plugin](https://dev.epicgames.com/documentation/en-us/unreal-engine)** — experimental, ships with UE 5.8, requires a source build of the engine.

If you like seeing this kind of thing get built and shared, [donations are always welcome](https://www.alexcoulombepresents.com/support) — they buy hardware, render time, and the freedom to keep giving most of this away.

- [MCP specification](https://modelcontextprotocol.io) — protocol-level reference

- [Unreal Engine Python API reference](https://dev.epicgames.com/documentation/en-us/unreal-engine/python-api/) — for `unreal.*` module surface

- [Unreal Engine 5 Editor scripting](https://dev.epicgames.com/documentation/en-us/unreal-engine/scripting-the-unreal-editor-using-python) — Epic's Python guide

- [Niagara documentation](https://dev.epicgames.com/documentation/en-us/unreal-engine/overview-of-niagara-effects-for-unreal-engine) — for Niagara-specific module / parameter concepts

- [MetaSound documentation](https://dev.epicgames.com/documentation/en-us/unreal-engine/metasounds-in-unreal-engine) — for audio graph semantics

Ready-to-adapt launch copy for Alex Coulombe Presents. These are drafts, not a record of posts sent. Link people to the [live browser reader](https://ibrews.github.io/ue5-mcp/) or [agent installation guide](https://github.com/ibrews/ue5-mcp

[Try Blueprint Reader](https://ibrews.github.io/ue5-mcp/)

[Try it](https://ibrews.github.io/ue5-mcp/)

- [Social preview card](../skills/blueprint-reader/assets/branding/social-card.png): a simple title, connected nodes and reading lens, with the established ivory/green palette. Both the reader and trailer Pages URLs include Open Graph/Twitt

- [42-second trailer](https://ibrews.github.io/ue5-mcp/trailer/): opens with the Claude story as source pages overwhelm an illustrated chat, shows an actual BlueprintUE import and Copy action, then follows the real widget connections with a

- [README / social graphic](assets/blueprint-reader-overview.png): workflow illustration, generated with the built-in image tool. The [generation prompt](assets/blueprint-reader-overview-prompt.txt) is included for reproducibility of the ar

- [Real interface screenshot](assets/blueprint-reader-local-ui.png): reader 0.2.2, 2026-10-21, the AI brief tab after ingesting Nicola's public [Extended dialogue system](https://blueprintue.com/blueprint/6v52d8no/).

Send people to **[ibrews.github.io/ue5-mcp](https://ibrews.github.io/ue5-mcp/)**. The website parses text and files locally in a browser worker. For automatic BlueprintUE imports, our Vercel helper fetches the linked export; graph parsing s

[Watch the 42-second trailer](https://ibrews.github.io/ue5-mcp/trailer/) · [Poster](../assets/blueprint-reader-trailer-poster.jpg) · [Try the reader](https://ibrews.github.io/ue5-mcp/)

- Captured on 2026-10-27 in the Codex in-app browser from the [live reader](https://ibrews.github.io/ue5-mcp/) and [BlueprintUE's graph view](https://blueprintue.com/render/6v52d8no/). Reader runtime: 0.3.1. The media revision does not chan

- Demo: [Extended dialogue system, posted by Nicola](https://blueprintue.com/blueprint/6v52d8no/), a publicly accessible export. The graph visuals and limited export/analysis excerpts are attributed to Nicola; the underlying Blueprint remai

<link rel="icon" href="../favicon-32.png" type="image/png" sizes="32x32">   <link rel="apple-touch-icon" href="../apple-touch-icon.png" sizes="180x180">   <link rel="canonical" href="https://ibrews.github.io/ue5-mcp/trailer/">

<link rel="apple-touch-icon" href="../apple-touch-icon.png" sizes="180x180">   <link rel="canonical" href="https://ibrews.github.io/ue5-mcp/trailer/">   <meta property="og:type" content="website">

<link rel="canonical" href="https://ibrews.github.io/ue5-mcp/trailer/">

<meta property="og:title" content="Blueprint Reader — Watch the 42-second trailer">   <meta property="og:description" content="From too much raw Blueprint code to a compact brief. See the real link import and graph inspection, then try it f

<meta property="og:description" content="From too much raw Blueprint code to a compact brief. See the real link import and graph inspection, then try it free in your browser.">   <meta property="og:url" content="https://ibrews.github.io/ue5

<meta property="og:url" content="https://ibrews.github.io/ue5-mcp/trailer/">

<meta property="og:image" content="https://ibrews.github.io/ue5-mcp/social-card.png">

<meta name="twitter:title" content="Blueprint Reader — 42-second trailer">   <meta name="twitter:description" content="Understand the graph. Keep the context small. See Blueprint Reader in action.">   <meta name="twitter:image" content="htt

<meta name="twitter:description" content="Understand the graph. Keep the context small. See Blueprint Reader in action.">   <meta name="twitter:image" content="https://ibrews.github.io/ue5-mcp/social-card.png">   <meta name="twitter:image:a

<meta name="twitter:image" content="https://ibrews.github.io/ue5-mcp/social-card.png">

<a class="button" href="../">Try Blueprint Reader →</a>       <a href="blueprint-reader-trailer.mp4" download>Download MP4</a>       <a href="https://github.com/ibrews/ue5-mcp/blob/main/docs/trailer/README.md#transcript">Read the transcript

<a href="blueprint-reader-trailer.mp4" download>Download MP4</a>       <a href="https://github.com/ibrews/ue5-mcp/blob/main/docs/trailer/README.md#transcript">Read the transcript</a>       <a href="https://github.com/ibrews/ue5-mcp">Source 

<a href="https://github.com/ibrews/ue5-mcp/blob/main/docs/trailer/README.md#transcript">Read the transcript</a>

<a href="https://github.com/ibrews/ue5-mcp">Source on GitHub</a>

</nav>     <p class="note">42 seconds · Captions on screen · Original music · No voiceover. Real BlueprintUE nodes and captured browser interactions, connected by motion graphics showing overload, a compact brief and focused inspection. Cha

<p class="note">42 seconds · Captions on screen · Original music · No voiceover. Real BlueprintUE nodes and captured browser interactions, connected by motion graphics showing overload, a compact brief and focused inspection. Chat/meter/wid

#!/usr/bin/env python3

#!/usr/bin/env python3

#!/usr/bin/env python3

**[Open Blueprint Reader in your browser →](https://ibrews.github.io/ue5-mcp/)** Free, no account or installation.

[![Watch the 42-second Blueprint Reader trailer.](../../docs/assets/blueprint-reader-trailer-poster.jpg)](https://ibrews.github.io/ue5-mcp/trailer/)

**[Watch the trailer](https://ibrews.github.io/ue5-mcp/trailer/)** · Real nodes and an actual link import, with motion showing source overload → compact brief → focused inspection. Clarifying captions and original music. [Transcript](../../

**A real example:** [this public 30-node graph](https://blueprintue.com/blueprint/6v52d8no/) produced a 1,336-byte brief from 81,358 bytes of source with reader 0.2.2. This is a summary, not lossless compression or a token-count guarantee. 

Open the [live browser edition](https://ibrews.github.io/ue5-mcp/) and click **Try a sample graph**, or paste your own Blueprint clipboard text. **Read Blueprint** stays neutral and disabled until the active input contains recognizable comp

git clone https://github.com/ibrews/ue5-mcp.git

New-Item -ItemType Directory -Force D:\GitHub | Out-Null Set-Location D:\GitHub git clone https://github.com/ibrews/ue5-mcp.git

Set-Location D:\GitHub git clone https://github.com/ibrews/ue5-mcp.git Set-Location D:\GitHub\ue5-mcp\skills\blueprint-reader

git clone https://github.com/ibrews/ue5-mcp.git

`~` means your user profile directory. These locations follow the [Codex local-skill documentation](https://developers.openai.com/codex/skills/) and [Claude Code personal-skill documentation](https://code.claude.com/docs/en/skills). Claude 

Use $blueprint-reader to explain https://blueprintue.com/blueprint/6v52d8no/.

/blueprint-reader Explain https://blueprintue.com/blueprint/6v52d8no/.

Open the `http://127.0.0.1:PORT` address printed in the terminal. Paste clipboard text, choose text files, reopen a saved session, or enter a public/unlisted BlueprintUE link. Use **Read Blueprint**, then **Copy AI brief**. This also works 

![Actual Blueprint Reader interface showing a BlueprintUE link, 30 nodes, 107 pins, an overview and the AI brief tab.](https://raw.githubusercontent.com/ibrews/ue5-mcp/main/docs/assets/blueprint-reader-local-ui.png)

Captured from reader 0.2.2 on 2026-10-21 using Nicola's public [Extended dialogue system](https://blueprintue.com/blueprint/6v52d8no/) export. This graph has no matches for the reader's supported improvement checks, and its missing ForEachL

Yes: **[ibrews.github.io/ue5-mcp](https://ibrews.github.io/ue5-mcp/)** is the browser edition. A `127.0.0.1` address still points to the optional local Node page on your own computer; it is not a shareable address.

For a no-install start, [open the live reader](https://ibrews.github.io/ue5-mcp/) and choose **Try a sample graph**. Its two branch outcomes deliberately enter the same destination; use **Inspect evidence** to see the exact pins.

node scripts/read-blueprint.mjs "https://blueprintue.com/blueprint/6v52d8no/"

The core reader and local page are free. Paid education, worked examples, review clinics and hands-on support are the intended complementary offering; no paid tier is needed to use this tool. No pricing or commercial service launch is annou

For a user who wants no installation, use the [browser edition](https://ibrews.github.io/ue5-mcp/). It parses raw text/files and saved sessions locally in a worker. Its BlueprintUE link mode fetches exports automatically through our hosted 

node scripts/read-blueprint.mjs "https://blueprintue.com/blueprint/ID/" --brief

Executable file

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">

#!/usr/bin/env python3

<div class="mode" role="group" aria-label="Source type"><button type="button" id="paste-mode" aria-pressed="true">Paste text</button><button type="button" id="link-mode" aria-pressed="false">BlueprintUE link</button></div>         <div id="

<div id="paste-input"><label for="source-text">Blueprint clipboard text or native graph JSON</label><textarea id="source-text" rows="11" spellcheck="false" placeholder="Begin Object Class=/Script/BlueprintGraph…&#10;    …&#10;End Object"></

<div id="link-input" hidden><label for="source-url">Public or unlisted BlueprintUE URL</label><input id="source-url" type="url" placeholder="https://blueprintue.com/blueprint/…/"><p class="hint">The export is fetched directly from Blueprint

import { startApp } from './app.js'; async function request(path, body) {   const response = await fetch(path, body ? { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) } : {});

Executable file

async function request(path, body) {   const response = await fetch(path, body ? { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) } : {});   const data = await response.json();

const response = await fetch(path, body ? { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) } : {});

inspect: params => request('/api/inspect?' + new URLSearchParams(params)),   async download(kind, id) {     const response = await fetch('/api/download?' + new URLSearchParams({ kind, id }));

async download(kind, id) {     const response = await fetch('/api/download?' + new URLSearchParams({ kind, id }));     if (!response.ok) throw new Error((await response.json()).error);

const response = await fetch('/api/download?' + new URLSearchParams({ kind, id }));

Executable file

Executable file

Executable file

Executable file

outputDirectory: 'public', functions: { 'api/blueprint.mjs': { maxDuration: 30 } } }, null, 2)); const { version } = JSON.parse(await readFile(root + 'package.json', 'utf8')); await writeFile(out + 'public/index.html', '<!doctype html><titl

const { version } = JSON.parse(await readFile(root + 'package.json', 'utf8')); await writeFile(out + 'public/index.html', '<!doctype html><title>Blueprint Reader fetch helper</title><p>BlueprintUE export fetching only. <a href="https://ibre

await writeFile(out + 'public/index.html', '<!doctype html><title>Blueprint Reader fetch helper</title><p>BlueprintUE export fetching only. <a href="https://ibrews.github.io/ue5-mcp/">Open Blueprint Reader</a>.</p>');

Executable file

export const ALLOWED_ORIGIN = 'https://ibrews.github.io';

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Live site: **https://ibrews.github.io/ue5-mcp/**. Version 0.3.0 introduced the static browser application; 0.3.1 adds automatic BlueprintUE imports through a dedicated fetch helper.

BlueprintUE does not permit direct cross-origin browser reads. `web/fetch-link.mjs` sends only a validated BlueprintUE URL to **https://blueprint-reader-fetch.vercel.app/api/blueprint**. The helper uses the same bounded HTTP fetching and HT

The page permits `connect-src https://blueprint-reader-fetch.vercel.app`, `script-src 'self'` and `worker-src 'self'`. The helper accepts GET/OPTIONS only, requires the exact `https://ibrews.github.io` Origin, validates the HTTPS BlueprintU

Upstream requests have a 20-second deadline, at most five fetch attempts across redirects, and a 32 MiB HTML cap. JSON responses are capped at 4 MiB, below [Vercel's 4.5 MB function limit](https://vercel.com/docs/functions/limitations). The

Open `http://127.0.0.1:8080/` for development. `dist/` is generated and ignored. The build bundles pinned dependencies, emits relative paths for project Pages hosting, copies MIT/third-party license notices and writes `version.json`. Use HT

The CLI uses UEBlueprint 3.0.0's ObjectEntity grammar without the browser renderer. Dependencies are pinned in package-lock.json. [UEBlueprint](https://github.com/barsdeveloper/ueblueprint) is MIT licensed; its 102 BlueprintGraph test expor

The live test fetches [Extended dialogue system](https://blueprintue.com/blueprint/6v52d8no/) and checks its HandleScriptFunction graph: 30 nodes, 107 pins, 18 execution and 20 data wires. This fixture can change or disappear; a live-test f

**Decision: do not enable binary `.uasset` import yet.** The unmodified [UnrealBPInspect v1.1.1](https://github.com/MarcedForLife/UnrealBPInspect/releases/tag/v1.1.1)

[UnrealBPInspect v1.1.1](https://github.com/MarcedForLife/UnrealBPInspect/releases/tag/v1.1.1)

The upstream [`read_package_header`](https://github.com/MarcedForLife/UnrealBPInspect/blob/f239a655f9194e47e2ee5e19c1c373731d0cefea/src/parser.rs#L92)

The upstream [UE 5.6+ coverage issue](https://github.com/MarcedForLife/UnrealBPInspect/issues/51)

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for (let hop = 0; hop < 5; hop++) {     const response = await fetchImpl(url, { redirect: 'manual', signal,       headers: { 'User-Agent': 'blueprint-reader/0.1 (+https://github.com/ibrews/ue5-mcp)', Accept: 'text/html' } });

const response = await fetchImpl(url, { redirect: 'manual', signal,       headers: { 'User-Agent': 'blueprint-reader/0.1 (+https://github.com/ibrews/ue5-mcp)', Accept: 'text/html' } });     if (response.status >= 300 && response.status < 40

headers: { 'User-Agent': 'blueprint-reader/0.1 (+https://github.com/ibrews/ue5-mcp)', Accept: 'text/html' } });

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#!/usr/bin/env node

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#!/usr/bin/env node

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#!/usr/bin/env node

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#!/usr/bin/env node

let current = null, busy = false;   return createServer(async (req, res) => {     const origin = `http://127.0.0.1:${req.socket.localPort}`;

return createServer(async (req, res) => {     const origin = `http://127.0.0.1:${req.socket.localPort}`;     const send = (status, body, type = 'application/json', extra = {}) => {

const origin = `http://127.0.0.1:${req.socket.localPort}`;

server.requestTimeout = 120000;   server.on('error', error => { console.error(error.message); process.exitCode = 1; });   server.listen(port, '127.0.0.1', () => console.log(`Blueprint Reader: http://127.0.0.1:${server.address().port}\nLocal

server.on('error', error => { console.error(error.message); process.exitCode = 1; });   server.listen(port, '127.0.0.1', () => console.log(`Blueprint Reader: http://127.0.0.1:${server.address().port}\nLocal only. Press Ctrl+C to stop.`)); }

server.listen(port, '127.0.0.1', () => console.log(`Blueprint Reader: http://127.0.0.1:${server.address().port}\nLocal only. Press Ctrl+C to stop.`));

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test('raw input stays local; link import sends only a canonical URL and ignores stale pasted text', async t => {   const url = 'https://blueprintue.com/blueprint/6v52d8no/';   const network = t.mock.method(globalThis, 'fetch', async (endpoi

const url = 'https://blueprintue.com/blueprint/6v52d8no/';   const network = t.mock.method(globalThis, 'fetch', async (endpoint, options) => {     assert.equal(new URL(endpoint).searchParams.get('url'), url);

await reader.ingest({ text: example });   assert.equal(network.mock.callCount(), 0);   await assert.rejects(reader.ingest({ url: 'https://evil.example/blueprint/a/' }), /Expected an HTTPS/);

assert.equal(network.mock.callCount(), 0);   await assert.rejects(reader.ingest({ url: 'https://evil.example/blueprint/a/' }), /Expected an HTTPS/);   await reader.ingest({ url: url + '?tracking=discarded#fragment', text: 'stale paste must 

await assert.rejects(reader.ingest({ url: 'https://evil.example/blueprint/a/' }), /Expected an HTTPS/);

test('link failures preserve prior graph and offer manual fallback; oversized/invalid helper responses fail', async () => {   const url = 'https://blueprintue.com/blueprint/6v52d8no/';

const url = 'https://blueprintue.com/blueprint/6v52d8no/';

await assert.rejects(fetchLinkedBlueprint(url, async () => new Response('x', { headers: { 'Content-Length': 5000000 } })), /too large/);   await assert.rejects(fetchLinkedBlueprint(url, async () => new Response('x'.repeat(4 * 1024 * 1024 + 

await assert.rejects(fetchLinkedBlueprint(url, async () => new Response('x'.repeat(4 * 1024 * 1024 + 1))), /too large/);   await assert.rejects(fetchLinkedBlueprint(url, async () => Response.json({ text: example, source: { url: 'https://evi

await assert.rejects(fetchLinkedBlueprint(url, async () => Response.json({ text: example, source: { url: 'https://evil.example/' } })), /Expected an HTTPS/);

await assert.rejects(fetchLinkedBlueprint(url, async () => Response.json({ text: example, source: { url: 'https://blueprintue.com/blueprint/other/' } })), /different Blueprint/);

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import { createHandler, ALLOWED_ORIGIN } from '../helper/handler.mjs'; import { fetchBlueprint } from '../scripts/fetch-blueprint.mjs'; const url = 'https://blueprintue.com/blueprint/example/';

import { fetchBlueprint } from '../scripts/fetch-blueprint.mjs'; const url = 'https://blueprintue.com/blueprint/example/'; const request = (value = url, options = {}) => new Request('https://helper.example/api/blueprint?url=' + encodeURICom

const url = 'https://blueprintue.com/blueprint/example/';

const request = (value = url, options = {}) => new Request('https://helper.example/api/blueprint?url=' + encodeURIComponent(value), {

let calls = 0;   const handler = createHandler(async () => { calls++; return { text: 'export', source }; });   for (const bad of ['http://blueprintue.com/blueprint/a/', 'https://evil.example/', 'https://blueprintue.com:8080/blueprint/a/', '

const handler = createHandler(async () => { calls++; return { text: 'export', source }; });   for (const bad of ['http://blueprintue.com/blueprint/a/', 'https://evil.example/', 'https://blueprintue.com:8080/blueprint/a/', 'https://user@blue

for (const bad of ['http://blueprintue.com/blueprint/a/', 'https://evil.example/', 'https://blueprintue.com:8080/blueprint/a/', 'https://user@blueprintue.com/blueprint/a/', 'https://blueprintue.com/profile/a/', 'https://127.0.0.1/blueprint/

}   assert.equal((await handler(request(url, { method: 'POST', body: 'private graph' }))).status, 405);   const denied = await handler(request(url, { headers: { Origin: 'https://evil.example' } }));

assert.equal((await handler(request(url, { method: 'POST', body: 'private graph' }))).status, 405);   const denied = await handler(request(url, { headers: { Origin: 'https://evil.example' } }));   assert.equal(denied.status, 403); assert.eq

const denied = await handler(request(url, { headers: { Origin: 'https://evil.example' } }));

test('shared fetcher revalidates redirects, caps streamed pages and decodes textarea once', async () => {   let calls = 0;   await assert.rejects(fetchBlueprint(url, async () => { calls++; return new Response(null, { status: 302, headers: {

let calls = 0;   await assert.rejects(fetchBlueprint(url, async () => { calls++; return new Response(null, { status: 302, headers: { Location: 'https://127.0.0.1/' } }); }), /Expected an HTTPS/);   assert.equal(calls, 1);

await assert.rejects(fetchBlueprint(url, async () => { calls++; return new Response(null, { status: 302, headers: { Location: 'https://127.0.0.1/' } }); }), /Expected an HTTPS/);

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test('only allowed BlueprintUE URL shapes are ready; input checks do not fetch them', () => {   for (const url of ['https://blueprintue.com/blueprint/6v52d8no/', 'https://www.blueprintue.com/render/test-1/?x=1#view']) {

for (const url of ['https://blueprintue.com/blueprint/6v52d8no/', 'https://www.blueprintue.com/render/test-1/?x=1#view']) {

assert.equal(inputProblem({ url }), null);   }   for (const url of ['https://blueprintue.com/', 'https://blueprintue.com/blueprint/', 'https://example.com/blueprint/test/',

}   for (const url of ['https://blueprintue.com/', 'https://blueprintue.com/blueprint/', 'https://example.com/blueprint/test/',     'http://blueprintue.com/blueprint/test/', 'https://blueprintue.com.evil.test/blueprint/test/',

for (const url of ['https://blueprintue.com/', 'https://blueprintue.com/blueprint/', 'https://example.com/blueprint/test/',

'http://blueprintue.com/blueprint/test/', 'https://blueprintue.com.evil.test/blueprint/test/',

'https://user:pass@blueprintue.com/blueprint/test/', 'https://blueprintue.com:444/blueprint/test/', 'not a link']) {

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const dir = await mkdtemp(join(tmpdir(), 'blueprint-session-')); t.after(() => rm(dir, { recursive: true, force: true }));   const path = join(dir, 'saved.json');   const sources = [{ text: raw, source: { name: 'test', url: 'https://invalid

const path = join(dir, 'saved.json');   const sources = [{ text: raw, source: { name: 'test', url: 'https://invalid.test/no-refetch', extraneous: true } }];   await saveSession(path, sources);

const sources = [{ text: raw, source: { name: 'test', url: 'https://invalid.test/no-refetch', extraneous: true } }];

await new Promise(resolve => server.listen(0, '127.0.0.1', resolve));   t.after(() => new Promise(resolve => { server.closeAllConnections(); server.close(resolve); }));   const origin = `http://127.0.0.1:${server.address().port}`;

t.after(() => new Promise(resolve => { server.closeAllConnections(); server.close(resolve); }));   const origin = `http://127.0.0.1:${server.address().port}`;   const post = (body, headers = {}) => fetch(origin + '/api/ingest', { method: 'P

const origin = `http://127.0.0.1:${server.address().port}`;   const post = (body, headers = {}) => fetch(origin + '/api/ingest', { method: 'POST', headers: { origin, 'content-type': 'application/json', ...headers }, body: JSON.stringify(bod

const post = (body, headers = {}) => fetch(origin + '/api/ingest', { method: 'POST', headers: { origin, 'content-type': 'application/json', ...headers }, body: JSON.stringify(body) });

const wrongHost = await new Promise((resolve, reject) => get(origin, { headers: { host: 'evil.test' } }, res => { res.resume(); resolve(res.statusCode); }).on('error', reject));   assert.equal(wrongHost, 403);   assert.equal((await post({ t

assert.equal(wrongHost, 403);   assert.equal((await post({ text: raw }, { origin: 'https://evil.test' })).status, 403);   assert.equal((await post({ url: 'file:///etc/passwd' })).status, 400);

assert.equal((await post({ text: raw }, { origin: 'https://evil.test' })).status, 403);

const res = await post({ text: raw, budget: 2000 }); assert.equal(res.status, 200);   const first = await res.json(); assert.equal(first.analysis.stats.nodes, 1); assert.ok(first.brief_bytes <= 2000); assert.doesNotMatch(first.brief, /Begin

const first = await res.json(); assert.equal(first.analysis.stats.nodes, 1); assert.ok(first.brief_bytes <= 2000); assert.doesNotMatch(first.brief, /Begin Object/);   const inspect = await (await fetch(`${origin}/api/inspect?id=${first.id}&

const inspect = await (await fetch(`${origin}/api/inspect?id=${first.id}&graph=s1:g1&node=Start`)).json(); assert.match(inspect.text, /Start/);

const saved = await (await fetch(`${origin}/api/download?id=${first.id}&kind=session`)).json(); assert.equal(saved.sources[0].text, raw);

assert.equal((await post({ text: 'invalid' })).status, 400);   assert.equal((await fetch(`${origin}/api/download?id=${first.id}&kind=brief`)).status, 200, 'failed parsing must preserve previous session');   const restored = await post({ fil

assert.equal((await fetch(`${origin}/api/download?id=${first.id}&kind=brief`)).status, 200, 'failed parsing must preserve previous session');

const restored = await post({ files: [{ session: saved }] }); assert.equal(restored.status, 200);   assert.equal((await restored.json()).analysis.stats.nodes, 1);   assert.equal((await fetch(`${origin}/api/download?id=${first.id}&kind=brief

assert.equal((await restored.json()).analysis.stats.nodes, 1);   assert.equal((await fetch(`${origin}/api/download?id=${first.id}&kind=brief`)).status, 404);   const page = await fetch(origin); assert.match(page.headers.get('content-securit

assert.equal((await fetch(`${origin}/api/download?id=${first.id}&kind=brief`)).status, 404);

const page = await fetch(origin); assert.match(page.headers.get('content-security-policy'), /frame-ancestors 'none'/);

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test('public BlueprintUE dialogue graph: real HTML extraction through connected graph', async () => {   const loaded = await fetchBlueprint('https://blueprintue.com/blueprint/6v52d8no/');

const loaded = await fetchBlueprint('https://blueprintue.com/blueprint/6v52d8no/');

#!/usr/bin/env python3

if len(data) < 52 or data[:4] != b'\xc1\x83\x2a\x9e':

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test('URL validation rejects unrelated hosts, credentials, and redirect escapes', async () => {   for (const url of ['http://blueprintue.com/blueprint/abc/', 'https://example.com/blueprint/abc/', 'https://blueprintue.com@evil.test/blueprint

for (const url of ['http://blueprintue.com/blueprint/abc/', 'https://example.com/blueprint/abc/', 'https://blueprintue.com@evil.test/blueprint/abc/', 'https://blueprintue.com:8080/blueprint/abc/']) assert.throws(() => blueprintURL(url));

await assert.rejects(fetchBlueprint('https://blueprintue.com/blueprint/abc/', async () => new Response(null, { status: 302, headers: { location: 'https://evil.test/' } })), /Expected an HTTPS/);

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import { mkdir, readFile, writeFile, copyFile, rm } from 'node:fs/promises';

for (const file of brandFiles.filter(file => file !== 'social-card.png')) replace(`href="/${file}"`, `href="./${file}"`); replace('src="/favicon.svg"', 'src="./favicon.svg"'); replace('</head>', `<link rel="canonical" href="https://ibrews.g

replace('src="/favicon.svg"', 'src="./favicon.svg"'); replace('</head>', `<link rel="canonical" href="https://ibrews.github.io/ue5-mcp/"> <meta property="og:type" content="website">

replace('</head>', `<link rel="canonical" href="https://ibrews.github.io/ue5-mcp/">

<meta property="og:title" content="Blueprint Reader — Understand the graph. Keep the context small."> <meta property="og:description" content="Turn Unreal Blueprint text or a BlueprintUE link into a compact brief for Codex or Claude. Free a

<meta property="og:description" content="Turn Unreal Blueprint text or a BlueprintUE link into a compact brief for Codex or Claude. Free and open source. Parsing stays in your browser."> <meta property="og:url" content="https://ibrews.githu

<meta property="og:url" content="https://ibrews.github.io/ue5-mcp/">

<meta property="og:image" content="https://ibrews.github.io/ue5-mcp/social-card.png">

<meta name="twitter:title" content="Blueprint Reader"> <meta name="twitter:description" content="Understand the graph. Keep the context small. Free, open source, in your browser."> <meta name="twitter:image" content="https://ibrews.github.i

<meta name="twitter:description" content="Understand the graph. Keep the context small. Free, open source, in your browser."> <meta name="twitter:image" content="https://ibrews.github.io/ue5-mcp/social-card.png"> <meta name="twitter:image:a

<meta name="twitter:image" content="https://ibrews.github.io/ue5-mcp/social-card.png">

replace('Runs on your computer', 'Parsing stays in your browser'); replace('Paste an export, drop in its macros, or bring a BlueprintUE link.', 'Paste an export, add its macros, or bring a BlueprintUE link.'); replace('</p></section>\n  <di

replace('Paste an export, drop in its macros, or bring a BlueprintUE link.', 'Paste an export, add its macros, or bring a BlueprintUE link.'); replace('</p></section>\n  <div class="workspace">', '</p><div class="actions"><button class="pri

replace('</p></section>\n  <div class="workspace">', '</p><div class="actions"><button class="primary" type="button" id="try-example">Try a sample graph</button><a href="https://github.com/ibrews/ue5-mcp/tree/main/skills/blueprint-reader#re

replace('</p></div>\n        <label class="file-zone"', '</p><button id="open-blueprintue" type="button" class="button">Open BlueprintUE ↗</button> <button id="use-copied-text" type="button" class="button">Use copied text instead</button></

replace('No AI API key. No Blueprint uploads. Pasted text stays in this local session; links contact BlueprintUE.', 'Pasted text and files stay in this tab. Link imports send the URL to our Vercel helper, which sees the export but does not 

replace('BLUEPRINT READER <span>', 'BLUEPRINT READER <a href="https://github.com/ibrews/ue5-mcp" target="_blank" rel="noopener noreferrer">Source on GitHub</a> <span>');

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export const FETCH_HELPER = 'https://blueprint-reader-fetch.vercel.app/api/blueprint';

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- [MCP specification](https://modelcontextprotocol.io) — protocol-level reference

- [Unreal Engine Python API reference](https://dev.epicgames.com/documentation/en-us/unreal-engine/python-api/) — for `unreal.*` module surface

- [Unreal Engine 5 Editor scripting](https://dev.epicgames.com/documentation/en-us/unreal-engine/scripting-the-unreal-editor-using-python) — Epic's Python guide

- [Niagara documentation](https://dev.epicgames.com/documentation/en-us/unreal-engine/overview-of-niagara-effects-for-unreal-engine) — for Niagara-specific module / parameter concepts

- [MetaSound documentation](https://dev.epicgames.com/documentation/en-us/unreal-engine/metasounds-in-unreal-engine) — for audio graph semantics