docs: Add interactive CodeCanvas diagram for create-t3-app

[riad-cc]

I was trying to understand how create-t3-app works under the hood so I created a diagram for it using code-canvas.com. I think it will be pretty helpful for contributors to quickly onboard to the inner-works of create-t3-app.

Here is the generated diagram for create-t3-app grouped by the application's use-cases and their runtime data flows:
Open create-t3-app's interactive diagram

I built code canvas to simulate a senior engineer who have been working on create-t3-app's codebase for pretty long and can explain to you any functionality of the repository visually through diagrams.

Here is what users are saying about codecanvas

"I used to spend 4 hours asking GPT how a use case in a codebase works and I keep going back and forth until I am able to draw a diagram to summarize my understanding,
CodeCanvas gives me that diagram in 40 seconds"

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Some Notes:

• The diagram is already generated for create-t3-app, completely free, no monthly subscription. Consider it as my contribution to help fellow contributors lower their context onboarding friction before they can start contributing.
• The diagram file is stored in the repository itself, so the readme link will only work after merging. Until then, you can view the diagram from the link I shared above.
• Read the 1 pager guide to learn how to refine simulations to capture specific codebase logics you might want to cover.
• I am aware the mapping to the source code is shiften a couple lines off in some cases, I am working on fixing the bug asap.
• You can reach me out anytime on discord discord.gg/t3ezMyMPqr

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Project	Deployment	Preview	Comments	Updated (UTC)
create-t3-app	Error			Nov 10, 2025 6:54am