The ChatGPT Apps SDK has a steep learning curve, specially OAuth, where you're the provider and ChatGPT is the client (not the other way around). This can trip you up easily.This skill teaches Claude Code how to build ChatGPT apps correctly: - MCP server setup (Node.js/Python) - OAuth with PKCE and Dynamic Client Registration - Widget development with window.openai API - 20+ gotchas with...
It aggregates market indicators that have been known to generate contrarian buy/sell signals. CNN Fear & Greed, Bank of America SSI, AAII Investor Sentiment Survey among others.
A few technical details:
* vibe coded ~70% of it — the parts that not were either UI polish that was faster to do directly or points of the data scraping pipeline where Claude got stuck
* architecture: vanilla JS frontend + Python/Flask backend + background jobs that run an AI data extraction pipeline (Perplexity Sonar / Exa for search + GPT-5)
* runs on render.com as web service + two cron jobs that run the data update process and send daily email notifications
At some point I did try Codex for a few PRs that were never merged and I re-did instead with Claude.
https://contrariansignals.com/
A dashboard of market sentiment indicators deliberately biased towards the opposite of whatever the crowd is doing right now.This was also partly motivated by wanting to play with terminal aesthetics and dense user interfaces.Indicators: CNN Fear&Greed, Put/Call ratio, AAII Sentiment Survey, BofA Sell-side indicator, among others — feedback appreciated on potential signals to...
Goulden & Millones. You could not make this shit up.
Httpdiff is a really good tool and way more powerful than mine.
I've used it multiple times and wanted to try making something that focused more on the request body (which in Httpdiff are saved to temporary files) and that was also a bit more visual than a CLI.
Btw, here is the code! https://github.com/vdel26/requestdiff
So it was a trade-off and I preferred showing all the headers at the expense of having to proxy the calls through a server.
[1] http://www.w3.org/TR/XMLHttpRequest/#the-getallresponseheade...
[2] http://www.w3.org/TR/cors/#cross-origin-request
I will make it available on Github later, so that you at least have the option of running it yourself.
1) the diff is really simple, line by line and text based. I'm just using this really awesome library to do it: https://github.com/kpdecker/jsdiff The JSON is just being pretty printed to be able to do a text diff in a meaningful way.
2) Yes, I do, and thanks for the suggestions! But I just wanted to go with the minimal version first and see if people found it useful.
I didn't know about Runscope's diffing feature. Btw, I'm using a HTTPBin for the sample requests, which is a Runscope project as far as I know :)
But you are totally right that it should not be requirement. I will fix that today. Thanks for letting me know!
The only part I struggled with was while building the table editor. I'm using contentEditable there and apparently React doesn't play well with it. The virtual DOM gets out of sync after user input and you have to manage it manually.
I really enjoyed making this and I'm happy to hear any feedback about ways to improve it! :)
Follow https://twitter.com/bestnytbooks on Twitter to know whenever a new book gets into the NYT best sellers list.
Only weekly book tweets, no spam or other superfluous content.
http://twitter.com/onestartupaday
Follow our account to get tipped about one new startup or amazing product each day. <p>Tweet or email us if you want to get featured (email: 1startupaday at gmail.com). <p>Many thanks!