How does PageSourceSearch know what rationality.training is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of rationality.training go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from rationality.training?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as rationality.training?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

rationality.training

Built with @clerk/ui 1.34.0, mermaid 12.0.0, @mathjax/mathjax-newcm-font 4.1.3, bromcom-ui 2.12.3, @blotoutio/providers-blotout-consent-sdk 1.73.0, dashjs 5.2.1, @marimo-team/frontend 0.25.0, @inkeep/cxkit-js 0.5.119, @reachfive/identity-core 1.42.0, @reachfive/identity-ui 2.1.0, jspdf 4.2.1, @cognigy/webchat 3.50.0 and more. 4 pages and 145 stored files, last crawled 2026-10-08.

rank 14,064,279 40 libraries 0 identifiers 33 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
@clerk/ui	1.34.0	2026-10-08
mermaid	12.0.0	2026-10-08
@mathjax/mathjax-newcm-font	4.1.3	2026-10-08
bromcom-ui	2.12.3	2026-10-08
@blotoutio/providers-blotout-consent-sdk	1.73.0	2026-10-08
dashjs	5.2.1	2026-10-08
@marimo-team/frontend	0.25.0	2026-10-08
@inkeep/cxkit-js	0.5.119	2026-10-08
@reachfive/identity-core	1.42.0	2026-10-08
@reachfive/identity-ui	2.1.0	2026-10-08
jspdf	4.2.1	2026-10-08
@cognigy/webchat	3.50.0	2026-10-08
twitter-widgets		2026-10-08
spectorjs	0.9.33	2026-10-08
@moveo-ai/web-client	0.117.0	2026-10-08
vditor	4.0.0	2026-10-08
volantis-static	0.0.1761982841160	2026-10-08
ovenplayer	0.10.54	2026-10-08
cytoscape	3.34.3	2026-10-08
graphql-playground-react	1.7.28	2026-10-08
@recogito/annotorious	2.7.14	2026-10-08
@tulipnpm/timekit_project_selector	2.1.4	2026-10-08
showdown-katex	0.8.0	2026-10-08
franken-ui	2.1.2	2026-10-08
@excalidraw/excalidraw	0.18.1	2026-10-08
@formio/js	5.6.1	2026-10-08
wsemi	1.9.3	2026-10-08
@talkjs/web-components	0.3.9	2026-10-08
@ant-design/x	2.9.0	2026-10-08
mori-chat-widget	2.0.49	2026-10-08
@devexpress/analytics-core	26.1.5	2026-10-08
phaser3-rex-plugins	1.80.20	2026-10-08
@okta/okta-signin-widget	7.49.1	2026-10-08
@joyfill/components	4.0.0-rc26	2026-10-08
@gradio/lite	5.45.0	2026-10-08
hexo-theme-redefine	2.9.0	2026-10-08
@limetech/lime-elements	40.5.1	2026-10-08
@jimmyswrld/j-calc	2.0.0	2026-10-08
@pydantic/ai-chat-ui	2.3.0	2026-10-08
libcurl.js	0.7.4	2026-10-08

Tracking, tag and verification IDs

No analytics property, tag manager container, pixel or site-verification token was found in the stored source.

Third-party hosts

Hosts outside rationality.training that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
app.excalidraw.com	connect	view source
cdn.jsdelivr.net	connect	view source
discord.gg	connect	view source
docs.excalidraw.com	connect	view source
docs.mathjax.org	connect	view source
embed.reddit.com	connect	view source
esm.sh	connect	view source
example.com	connect	view source
excalidraw-room-persistence.firebaseio.com	connect	view source
fatebook.io	connect	view source
giphy.com	connect	view source
gist.github.com	connect	view source
github.com	connect	view source
json-schema.org	connect	view source
json.excalidraw.com	connect	view source
libraries.excalidraw.com	connect	view source
mermaid.js.org	connect	view source
oss-ai.excalidraw.com	connect	view source
oss-collab.excalidraw.com	connect	view source
platform.twitter.com	connect	view source
player.vimeo.com	connect	view source
plus.excalidraw.com	connect	view source
react.dev	connect	view source
reddit.com	connect	view source
twitter.com	connect	view source
us-central1-excalidraw-room-persistence.cloudfunctions.net	connect	view source
vercel.live	connect	view source
www.eclipse.org	connect	view source
www.figma.com	connect	view source
www.mathjax.org	connect	view source
www.w3.org	connect	view source
www.youtube.com	connect	view source
youtube.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 145) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
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Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-08 first crawl

4 pages, 145 files, 11.2 MB; 40 libraries, 0 identifiers, 33 third-party hosts
40 libraries added
- @ant-design/x 2.9.0
- @inkeep/cxkit-js 0.5.119
- @clerk/ui 1.34.0
- @moveo-ai/web-client 0.117.0
- @joyfill/components 4.0.0-rc26
- mori-chat-widget 2.0.49
- spectorjs 0.9.33
- franken-ui 2.1.2
- @cognigy/webchat 3.50.0
- @formio/js 5.6.1
- @tulipnpm/timekit_project_selector 2.1.4
- bromcom-ui 2.12.3
- and 28 more
33 third-party hosts added
- react.dev
- www.w3.org
- json-schema.org
- example.com
- fatebook.io
- github.com
- vercel.live
- cdn.jsdelivr.net
- www.mathjax.org
- docs.mathjax.org
- libraries.excalidraw.com
- docs.excalidraw.com
- and 21 more
145 files added

Questions about rationality.training

How does PageSourceSearch know what rationality.training is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of rationality.training go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from rationality.training?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as rationality.training?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.