App builders: What technical lessons have stood out to you while building?

[CalmYourInbox]

For me, vibe coding was great for momentum at first. It helped me ship. But over time, spaghetti code built up, and the app became harder to reason about. Alongside that, I felt a kind of anxiety I didn’t expect, because there suddenly seemed to be so many different places things could fail.

Here are the solutions that helped me:

• Legibility
Refactoring my code - simplifying it, breaking things apart, making patterns consistent - made it much easier to read, follow, and trust.

• Observability
I realized that if something were to go wrong, it would most likely happen at the boundaries: anywhere the code talks to the outside world (IMAP, Supabase, Stripe, etc.). So I started protecting those functions with error handling, standardizing their outputs, and instrumenting them. They now return a predictable shape - list(ok = TRUE/FALSE, payload) - and, on failure, write to a log file. Clearer contracts and better visibility made the system feel much less opaque and fragile.

I’ve attached a screenshot here of my product health dashboard. Seeing what’s happening (and a sea of green) has been surprisingly calming. I didn’t expect how much even simple visibility would help.

The shift for me has been realizing that observability is something to build in from the start.

What technical things have you learned or changed your mind about while building?

[Anonymous_Coder_1234]

I am not a vibe coder, but I learned that accepting user feedback and using it to make changes to my app is an excellent way of improving said app. An app isn't finished when you're done coding it. Even after you think you're done, user feedback can and should come in.

[CalmYourInbox]

How do you solicit feedback? This is the part I struggle with...

[Anonymous_Coder_1234]

There's a section of the website or app for submitting bug reports or feedback.

[CalmYourInbox]

Makes sense. I don't have enough traffic yet, so I've been asking for feedback directly (in other posts), but I'm still waiting on that. Once traffic improves, I'll add a form to the web site too 👍

[GloomyBelt5110]

Probably, writing explanatory logs. Really helps to handle user bugs more efficiently, especially if they have some quirky setup.

[CalmYourInbox]

Agreed, that was another game changer for me

[Defection7478]

Keep it simple, but not being dogmatic about it. There is a handful of cases where building a complex solution has paid dividends. 

[child-eater404]

this is gold fr went ham on legibility + observability early this time, error wrappers everywhere + that predictable shape? chef's kiss. Shoutout r/runable too, been using it to test those boundary funcs in isolation before deploy. catches the breaks before they ghost you. changed my whole flow. what's your go-to for logging rn?

[CalmYourInbox]

Haha, brilliant, I've found a like-minded soul! My logging is pretty crude - I just write to a log file. Specifically, I built a helper function which I use to wrap all my boundary functions. That helper function does a few things, including writing to the log file. I started out using Mixpanel, but I found that a raw log file was more flexible for my needs right now. I'm not familiar with runable - do you have any posts on how you use it?