Ecosystem Graph

Everything I publish, on one interactive map: my GitHub profile, every public repo, the apps live on GitHub Pages, julianhilgemann.com and the channels around them, with every link between them. Because it checks each of those links, it also works as a link checker for all of it.

Open the graph →

What you see

Shape	Node
Orange hub	The GitHub profile (this account's profile README)
Blue sphere / dot	A public repo
Green diamond	A live site: julianhilgemann.com, a GitHub Pages app, another domain
Violet cube / square	A channel: LinkedIn, YouTube, email, Buy Me a Coffee
Grey dot	An external host (hidden by default)
Red cross	A repo that is linked but does not exist

Particles flow along each link in its direction. A link is one of: a hyperlink, an embedded image, a deploy (repo → its live site), a repo's About website, a git submodule, or a video's channel.

Link colours carry health: grey works, amber works only through a redirect (the old name of a renamed repo, which keeps redirecting only until a new repo takes that name), red is broken. The link problems button lists every one with the file and line, or the page, where it lives and, for renames, the URL to use instead.

Views: 3D (default on desktop), 2D (default on phones), and a list. Drag to orbit (3D) or pan (2D), scroll to zoom, click a node for its links, press / to search.

Deep links: #repo:fx_macro_platform opens a node, #health the link-health panel, and ?view=2d (or 3d, list) picks the view.

How it works

scripts/crawl.mjs builds graph.json from three sources:

1. Every public repo, through the GitHub API: metadata, the file tree, every README.md at any depth, and .gitmodules. GitHub links are resolved against the API (catching renamed repos) and against the target repo's file tree (catching links to files that no longer exist). Relative links inside a README are checked against the same tree.
2. The live sites: the sites in graph.config.json are crawled page by page, each Pages app by its home page.
3. Everything else gets one GET. Sites that block crawlers (LinkedIn) are listed but not checked.

A GitHub Action re-crawls every morning at 05:17 UTC and on every push, builds the Vite app and deploys it to GitHub Pages. Its token sees public repos only, so a private repo never reaches the published graph. Nothing is committed back: the live graph.json is always the latest crawl.

The page is plain JavaScript on 3d-force-graph (Three.js) and force-graph. Colours and type come from design-system, included as a git submodule, so the graph matches julianhilgemann.com.

Run it locally

git clone --recurse-submodules https://github.com/julianhilgemann/ecosystem_graph_app.git
cd ecosystem_graph_app
npm ci
npm run crawl               # needs GITHUB_TOKEN, or a logged-in gh CLI
npm run dev

npm run crawl -- --private also includes your private repos, for a look on your own machine. public/graph.json is gitignored, and CI always crawls fresh, so that file never reaches the published site.

Configure

graph.config.json:

• sites: websites to crawl page by page. hosts are the domains that count as the site, repo binds a custom domain to the repo that deploys it, seeds are the paths to start from.
• socials: channels to show even when nothing links to them yet, and the label to give them.
• edges: links the crawler cannot see, such as the website field of a LinkedIn profile: { "source": "<node id>", "target": "<node id>", "note": "…" }. Node ids are shown at the bottom of each node's panel.
• ignoreHosts: badge and image hosts that are not worth a node.
• uncheckedHosts: hosts that refuse crawlers; their links are drawn but not checked.

GitHub disables scheduled workflows in a repo with no activity for 60 days. If the crawl date in the page footer stops moving, re-enable the workflow under Actions, or run it by hand there.