Catalin Banu

@gdb /goal needs a verifiable stop condition, otherwise it becomes “keep improving forever” slop

how to use /goal in codex — keep Codex working on a persistent objective until it's solved:

- Te iubesc! - Spune-mi ceva ce nu știu. - Rwanda e una dintre cele mai curate țări din lume, începând cu capitala Kigali. Țara africană a interzis din 2008 pungile de plastic și alte produse din acest material. Amenzile sunt mari iar la punctele de frontieră sunt confiscate orice pungi și înlocuite cu alternative din hârtie sau pânza. Dar esența acestei transformări e implicarea întregii populații in menținerea și conștientizarea procesului. În ultima sâmbăta din fiecare lună are loc Umuganda. Între 8 și 11 magazinele se închid, traficul se restricționează și toată populația în frunte cu președintele țării face curățenie, plantează copaci și întrețin spațiile verzi.

@FCB_Cartel @sama "when asked about the PR : it said it’s useless and cleared the whole PR and closed it." Well that were best invested money! Think if that code was in prod :D

Codex in the last 3 days has been a nightmare. Hallucination after hallucination, writing so much unwanted code, creating things that are not at all intended, taking too much time and burning tokens unnecessarily. Especially /goal. @sama something is wrong. It burned 50% of my Pro plan tokens for the week in 1 night creating a PR of size 104k lines and when asked about the PR : it said it’s useless and cleared the whole PR and closed it.

@plainionist At first, I thought LLMs would filter out people from the programming world who have no real connection to programming Now I think they will bring even more people into this world who have no idea what they are doing

Uncomfortable truth: LLMs already write better code than many mediocre developers. Agree? 🤔

@robinebers They should have Wednesday and Friday as hotfix days

very disappointed by this codex release it now has a mobile app, but it’s super buggy, doesn’t refresh, the UX was clearly not tested enough please don’t turn thursday into slop releases. would rather wait a few more weeks to get this done right instead few examples: - projects don’t sync reliably - app shows threads from weeks ago that codex doesn’t show and there’s no archive all button - adding a new project requires a full path in a dialog this ain’t it chief

@thsottiaux that's it .. U need to talk with @tim_cook @sama

@JFPuget Sometimes when i do this i see some constraints that i miss From my experience 5.5 low is much dumber than 5.3 low

@catalinbanu Maybe I wasn't clear. I have been using codex effectively for months. It is the first time I see it behave like this. Reason is change in system prompt, see another post I reposted.

I just had a disturbing session with codex. I asked it to update a given code file to add a feature, and I provided another file containing a similar feature implementation. I asked it to not modify any other file other than the file it was asked to create for the new feature. Iteration 1: It claimed to have updated the file with the requested change. Reality: no file edit at all Iteration 2: after being asked why the file wasn't modified, it implemented the requested change, along with two other unrelated and non requested changes. Iteration 3: After being asked to undo the extra 2 changes, it undid all changes. Back to square 1. Interaction 4: after being challenged again, it implements the requested change correctly. This is with GPT 5.5 xhigh fast.

@tanujDE3180 Before Nginx, there were many others that did a better job than Apache

The guy who made your APIs fast… without you noticing. He did it with a reverse proxy written in C. > Meet Igor Sysoev > Russian engineer. Working at Rambler (a major Russian search engine) > Faced one brutal problem: Too many users, servers couldn’t keep up > Early 2000s: Apache HTTP Server dominated But it used a process/thread per connection > Problem: More traffic = more memory + CPU Servers crashed under high concurrency > He needed to handle 10,000+ simultaneous users Without scaling hardware endlessly > So he wrote NGINX > Event-driven, non-blocking architecture > One worker → thousands of connections Instead of one thread per request > Result: Massive performance boost Tiny memory footprint > Also introduced powerful features: - Reverse proxying - Load balancing - Caching - Static file serving > Became the “front door” of modern web apps > Handles traffic before it hits your backend Protects + accelerates APIs > Netflix, Airbnb, Cloudflare using this > Powers a huge chunk of the internet (~40%) > In 2019, F5 Inc. acquired NGINX For $670 million - Still lightweight - Still insanely fast - Still everywhere Every time your API feels fast… you’re probably going through his code. Absolute GOAT 🐐

@thsottiaux Realising when it should ask context or clarification before starting work

What are we obviously not getting right with Codex?

@1001calatorii Asa ca m-am trezit cu vreo 4gb de pdf downloadate :))

@1001calatorii E pentru taskuri. Orice fel de taskuri, inclusiv cod Dar poti sa ii zici sa intre pe site-uri si sa faca tot felul de lucruri. Saptamana asta vad ca au pus si pluginuri pentru gmail Eu l-am pus invatat sa caute pe arhivele nationale sau pe archive.org si m-a ajutat

Gemini e cel mai tampit AI, aproape că-mi pare rău pentru Google. Îl foloseam pentru sarcini banale și pentru că se conectează la Google maps (aici se descurcă), dar nu pricepe nimic 😅 Până la urmă mi-am instalat pisica lui Mistral, Claude e pentru chestii mai avansate.

@almmaasoglu I do think that many of the limitations of Codex come from: - a good set of general instructions and constraints - a missing feedback loop - a lack of local tools to inspect problems and side effects (These three are present to a human programmer by nature)

Early gpt5.5 feedback: - over defensive slop code gone - faster than gpt 5.4, even on xhigh - less verbose - intelligent on low/medium This model so far has written the best code I have read from any llm. It just gets what you want, previous models struggled with this a lot

@simpsoka It would be great to understand when i’m f***ing serious!

Codex users: I'm curious how you feel about its personality/communication style. When do you want it more concise vs more explanatory? More direct vs more collaborative? Examples where it talked to you especially well, or badly, would be gold. DMs open!

@Tech_girlll Well, if it can fix bugs, who do you thing write those bugs?

If AI can write your code, fix your bugs, and explain your logic. what exactly makes you a valuable developer today?

@unclebobmartin I had a pet project where about 90% was reverse engineering of a system. At one point, performance was around 40% and had stalled I asked Codex to add JSONL logs, build a diagnostic tool, and provide a way to track performance KPIs. In one day, I got it up to 92%

Have you ever scanned an error.log file trying to get an idea of what's going on? I installed codex into the Raspberry pi controlling the flight school status board I've been working on. This morning I asked codex this: "What is the pattern of communication failures since midnight." It replied: What stands out is that today’s failures are concentrated in a 2-minute burst around 03:20-03:22, and they are server-side 500 responses, mostly hitting reservations. There are no Read timed out, DNS, or Network is unreachable errors since midnight today, so the pattern since midnight is a brief backend- error cluster, not a broad connectivity failure.

@vlad_mihalcea Codex

Sad 🐼. Looks like Copilot Pro has removed Opus from the Model list. Which one do you recommend using for software development? GPT 5.4, GPT 5.3 Codex or Sonnet 4.6?

@johncrickett About 25 years ago, we used a chroot-based setup: a Perl script read a recipe file and copied the required binaries into an isolated filesystem. Basically, a prehistorical Docker :)

Performance quiz: If we re-wrote Docker in Python, what impact would it have on container performance? Most people say "slower." They're wrong. 👇

@Samaytwt Still, people purchase fewer professional photography services.

Unpopular opinion: "AI makes everyone a developer" is true the same way "cameras makes everyone a photographer"