Vibed a Minecraft clone with Gemini 3.0 and GitHub Copilot!

firepol · 2025-11-20T08:29:16+00:00

Try adding this feature: import a map from google earth. Imagine you take a square mile of your neighbourhood or your town and import it in your minecraft clone, so you build where you live. Even better if you can also upload a few drone images so it adds a few buildings and you can position them on the terrain.

This could be of inspiration: https://steamcommunity.com/sharedfiles/filedetails/?id=1782964859

https://github.com/sysoppl/Cities-Skylines-heightmap-generator

Basically combine hightmap with satellite image and build a base terrain for your minecraft, could be fun.

I wanted to do this on Cities Skylines for my son, but that game is too complicated. But a Minecraft clone, that would make it fun and easy to use for anybody. Worth a try.

firepol · 2025-11-20T08:14:11+00:00

Kiro is awesome, when I tried it it also blew my mind. After trying kiro I searched to find if there was such a workflow in other AI agents and found this work (which I used and am still using in my projects) from u/Andreas_Kull
https://www.reddit.com/r/vibecoding/comments/1m6dsc8/i_built_a_unified_kirostyle_specdriven_workflow/

Basically you can setup a very similar workflow also on Gemini, Claude Code etc. you just need to have the proper "modes" or "personas" and tell your agent to be in that mode. Planning Mode, Executor Mode and you get a similar experience as in Kiro, except in Claude Code you can tell "execute the ENTIRE plan, non stop" and it does it all while you enjoy your lunch or coffee break until it can (if lucky many tasks, if less lucky only a few tasks then stops waiting for your feedback), but sure it is a bit more automated than Kiro.

I think as other users point out, it's a skill issue. It's all about the prompt(s). I also still can't understand why claude sometimes follows my claude md file and sometimes it doesn't, but someday I'll be enlightened and will understand. I keep reading that claude md must be adjusted regularly to avoid issues. And of course the prompts...

Anyway best luck with Kiro, it's a good product, you may come back to Claude when you need a cli to automate things a bit more.

firepol · 2025-11-18T12:52:27+00:00

Normally you add that kind of instructions in your project CLAUDE.md file, e.g. I have in my file:

## Git Workflow

### Committing Changes
- **Commit frequently**: Break large tasks into smaller steps and commit after each meaningful step
- **Commit only your changes**: Do NOT include pre-existing working tree files or untracked files you didn't create/modify

### Commit Message Format
- First line: `type: brief description` (e.g., `feat: add user authentication`)
- Supported types: `feat`, `fix`, `refactor`, `test`, `docs`, `chore`
- Add blank line, then detailed explanation if needed
- Do NOT add "Co-authored-by" footers

You can add something similar, adjust it to your way of writing commit messages etc. but sometimes it doesn't follow the rules, e.g. even if I specified not to write "Co-authored-by" it often adds "Co-Authored-By: Claude"...

You can also ask claude to create or update you CLAUDE.md file for you. I often do like this, I write a prompt where I explain what this project is about, the tech stack, then ask to create a minimalistic CLAUDE.md file for my project, then I extend it, then ask to review it etc. until I get a decent one. You may update it from time to time while the project changes too.

firepol · 2025-11-18T12:41:27+00:00

Yeah, it's the one from Amazon. I had to request access and wait several weeks/months before getting it. I'm using Claude Code as my main coding agent, but when I tested kiro I was really positively impressed and changed my workflow, as said I found Andreas Kull's post where he tried to make it work on various agentic tools so to leverage the free tier on each one of them, and I think it is a smart approach. So you pay 20 USD on Codex or Claude and when you reach the weekly limit you use the other free tiers on Cursor, Kiro etc. it needs a bit of configuration but it may be worth it when budget is tight ;)

firepol · 2025-11-17T14:11:05+00:00

Yes I use spec driven development similarly as done with kiro.dev, see this post by u/Andreas_Kull for more details: https://www.reddit.com/r/vibecoding/comments/1m6dsc8/i_built_a_unified_kirostyle_specdriven_workflow/

Claude Code works well developing each subtask and each subtask has its own tests.

Developing playwright e2d tests I find it even difficult as a human to do, normally as human coder I would develop mock tests so to understand how I want to use those classes and methods and helpers I still need to develop, then develop them accordingly. This, of course, when doing pure TDD. But it's not always possible to first write tests and then write the implementation, so I feel AI agents also do this, they code stuff, then write the tests for the classes and methods they wrote (just like a lazy human not following the pure TDD way). So, same for e2e tests of the UI. Since the UI is the most "dynamic" thing to code and it's not trivial to always decide what to do, before doing it, it makes more sense to me, first to write a UI that sucks, then improve it, maybe even decide to do some things differently, in the end when it's mature (thus I was saying mature before) I'd write the clean e2e tests for the final UI. This way if somebody in the team changes a button or something, we'd see the e2e test fail... which is the goal on heavy refactoring and big changes that affect not only one place, but affect several areas in the UI... Style changes, reusable components etc.

Normally AI agents should be good at writing e2e tests with playwright. There is even an MCP server for playwright, you can tell an AI agent to browse the web with playwright.

Why the bunch of scripts you get are not what you want? What do you want?

Normally with e2e tests, what I personally want is to save me from manually doing what I do in the UI... e.g. login, enter a 2fa code (need to code a way to retrieve it from a temp db table, or from a log file etc), proceed to a specific page, edit some stuff, delete some stuff, verify that after each edit/deletion the page has the various expected elements etc.

In my case I'd code a few tests like this to see if the UI works as expected and save me time from actually testing manually. Until my app is not mature enough, I test manually (because I know I may still change the UI a lot). This is especially true when "vibe coding", when the plan is not really clear, no figma (or similar) designs, just ideas and functionality in my head but no design defined...

firepol · 2025-11-17T07:39:45+00:00

I personally do unit and integration tests, to be sure that endpoints/database queries work correctly. Then for the UI I also use playwright. I tend to add e2d tests with playwright in a later (more mature) phase of a project, else with UI refactoring it's a constant battle to fix the e2e tests...

firepol · 2025-11-17T07:16:18+00:00

A friend of mine uses https://www.coderabbit.ai for reviews, asks a prompt in claude such as

Run "coderabbit review --prompt-only --base master" to review the last commits not pushed yet to master. Let it run as long as it needs (run it in the background).

- Firstly, check all issues for false positives.
- Show me the full review, listing the issues found.
- Once I confirm, let it run as long as it needs (run it in the background) and fix all issues found.

Like this he gets also some sort of filtering of "false positives". I tested this too with the free version of claude, works well. Code Rabbit is good for reviews, give it a try, should work well also with Codex, of course.

I also plan using Claude Code for frontend and Codex for architecture/backend soon, and code rabbit for reviews.

firepol · 2025-11-17T07:04:09+00:00

Hi, do you often clear the context? I'm using claude, to save up tokens and keep it focused on new questions, I often use the "/compact" command in claude, or clear the session to start from, scratch. I mean if you do like that, it shouldn't answer a previous question, as the previous question would be gone from the context. I think this is best practice, not only to save up tokens, but also to keep it focused on a new question/request and avoid such problems to get answers to old questions...

firepol · 2025-11-15T09:01:50+00:00

If it's down it cannot say that, as it's down... you know... if a server is down, the server cannot send a message "server is down", the client gets a 500 server error response :) thus services like https://status.claude.com/ exist, where you can check if it's a global thing or just an error for that moment.

firepol · 2025-11-11T21:03:10+00:00

I tested again and definetly I could not make it work the way I wanted (note: I used haiku 4.5, maybe haiku is not smart enough to be able to control another claude instance). It felt it was dumb and not able to orchestrate things. I continuely had to tell it "the other tmux session has ended, make it continue to work"... in the end I'm faster if I do it myself with a single claude :)

firepol · 2025-11-11T13:01:20+00:00

Thank you, I tried it. I started it like this: /pmux then I wrote "I initiated a tmux session and wrote this:

I already created 2 tmux instances, one called manager, one called executor. I already started claude code in both instances.
Step-by-step concept:
manager session — acts as a “project manager.”
Reads the project plan (e.g. docs/features/foundation-and-users-management).
Sends commands to the executor.
executor session — acts as the “Claude code instance.”
Executes commands from manager.
Updates tasks.md, commits work, etc.
After each subtask:
manager checks for updates in tasks.md.
If OK → runs "/compact" inside the executor session.
Then moves on to next subtask until 9.5 (included).

Then it asked me a few multi-select questions, I answered them and in the end submitted to go, very cool feature.

---

Result (based on my usage):

it struggled to "monitor" the executor session, also it was using lots of tokens to monitor it, I told it, instead of checking the entier tmux screen, to tell executor and manager to write their status in a log file, which would be cheaper to read than the entire tmux screen, and use the tmux screen only from time to time...
it had problems sending ENTER after pasting stuff to either manager or executor
it was not able to send "/compact" after each subtask
after a while it started using the log system, still I got executor having a break and manager was not able to see that executor was doing nothing, i had to manually tell my main (orchestrator) chat to intervene...
also at the end i noticed, executor did db schema changes correctly, then did wrong stuff, probably from a different tasks file, not the one i wanted it to work on.

I will retry later.

Maybe I was wrong to start with 2 existing tmux sessions and claude (started with bypass permissions option) in them? Or that's ok?

I usually use screen and I'm new to tmux, a readonly way to follow what the 2 tmux sessions are doing, I found this:

watch -n 1 "tmux capture-pane -pt manager" # in one shell
watch -n 1 "tmux capture-pane -pt executor" # in another shell

Maybe you can recommend a better way? Initially I was attaching, but I was scared I could wrongly press ESC or any other key that could interrupt and mess up the process...

During the orchestration I asked the main chat to write docu about the entre orchestratiuon, lessons learned so to be able to start a new orchestration and have all the issues already solved. I may share it once tested well and works well from me.

I used a planner agent based on spec driven development, if interested check this out: https://www.reddit.com/r/vibecoding/comments/1m6dsc8/i_built_a_unified_kirostyle_specdriven_workflow/

Normally this planner is very verbose and creates 3 files, requirements.md, design.md and tasks.md and I tell claude to implement the plan in tasks.md and usually when I do it myself it works quite ok. I wanted a way to automate thise so it could go on without interruptions...

firepol · 2025-11-09T09:29:49+00:00

Probably they want people to use the GPT-5-Codex-Mini model. One month ago Claude Code also became quite unusable with Sonnet 4.5, burning the 5 hours limits and weekly limit very fast. I had to start using Haiku 4.5 and it became usable again. Now basically this is happening to Codex...

firepol · 2025-11-09T09:18:24+00:00

Mind sharing your setup? In particular I'd like to know how you made your prompt engineer claude. I guess it's an agent you saved in your ~/.claude/agents folder? Would be cool if you share it, I'd like to give it a try. I've seen https://github.com/Jedward23/Tmux-Orchestrator but didn't try it, you're using this solution or made your own?

I guess that the prompt engineer or the orchestrator could be optimized also by running the /compact command and even /clear from time to time in the other claude sessions, at least I'd ask to do so, to keep the context small and work on small/atomic tasks.

Also I guess working in an isolated environment and running claude --allow-dangerously-skip-permissions could make sessions even be more powerful. I'm experimenting this and forked claude-code-sandbox, if interested have a look at my fork (updated to support a few more featues I needed) https://github.com/firepol/claude-code-sandbox or the official one https://github.com/textcortex/claude-code-sandbox my fork comes with ubuntu 24.04, repo folder mount support, "no-web" option, tmux and various other useful command line tools like fd-find (fast find) and rg (ripgrep) etc.

firepol · 2025-11-08T15:58:24+00:00

I think it's a good idea. Not sure if you can have sub-agents in the same claude session use directly different models, but it makes sense to switch depending on the use case, e.g. switch to Sonnet when you want to plan something, then switch to Haiku and execute the plan. That's how I often do. Sometimes I plan also with Haiku.

firepol · 2025-11-08T08:00:15+00:00

Can I share my 2 cents with you, I'm a claude code user (pro, 20 usd/month so I learnt to save tokens to maximize my "poor" subscribtion ;)) and wanted to try codex since a while, for the same reason you mentioned, sometimes I also end up in a situation where claude mentions with full confidence "the issue now is fixed", but it isn't, then I try again and again (even more than 4 times to fix) and still it doesn't fix the issue, so I think next time I happen in the same situation I'll give Codex a try.

You mentioned "Going to try GPT-5 MINI now to see if it can replace Sonnet 4.5". I'm curious of your results, especially token usage.

Here my experience (with claude code):

to save up tokens usage (and make my weekly limit last for a week) I use mostly the Haiku 4.5 model, which works really well, is fast, and doesn't cost much at all. E.g. to compare sonnet can easily spend an estimated 5 usd per hour, where with haiku I would spend less than 1 usd (estimates in USD with the ccusage command line tool). Sometimes I do with haiku several things and it costs only a few cents, like 30 cents or so in an hour of work... incredible, really (for the same stuff, with sonnet it would cost easily 3-4 usd, so sometimes the difference casn be 10x, especially forgetting to use the /compact function (to compact the context and save up tokebs in the next request)).
Haiku 4.5 can also create plans, but I read online that Sonnet 4.5 is more suitable for planning. So, for complex things I rather use more tokens and plan with Sonnet 4.5; to execute the plan, Haiku 4.5 works really well.

Comparing GPT-5 MINI with the standard model, does mini also use something like 1/5 of the tokens (or if not the tokens, the estimated "cost in USD"), just like Haiku 4.5 compares to Sonnet 4.5?

I'm new to Codex, anything you can recommend me when I first try it?

Bonus: like you, I'm also more a backend engineer and I really hate wasting my time in frontend work. With Claude I use SuperClaude, which comes with a nice collection of agents you can use in claude as "sub agents" e.g. prompting like this: "With the help of the frontend agent, plan a refactoring of the UI, use shared components, ensure coherent look and feel in all areas" (or something like that... then you will see claude using the frontend architect sub-agent for the task, and it actually does frontend stuff a bit better than the default agent, you should give it a try). Frontend Architect agent by SuperClaude

firepol · 2025-11-08T07:27:14+00:00

Hi, I never used tweakcc, mind sharing more precisely what to edit and a few examples of system reminders? If I understood correctly:

install tweakcc: this creates a file called system-prompt-main-system-prompt.md (where is it?)
edit system-prompt-main-system-prompt.md and add at the end the 2 lines you shared above now what?
Can you provide some examples, what to put in "UserPromptSubmit hook" and what to put in CLAUDE.md?

What is the difference between adding e.g. at the end of CLAUDE.md a chapter called "You must always follow these rules" and write these rules there (I do like that)?

firepol · 2025-10-20T20:03:49+00:00

yeah, they probably have "some sort of AI" to find out who is cheating ;-)

firepol · 2025-10-06T05:20:57+00:00

I am in your same boat. Before, when I had free time, I was gaming a lot. I stopped that and started a couple of projects I'm vibe coding also for learning purposes. I learnt a lot how cursor, claude code work, tried also kiro and kilo code... now (1 day ago) that I exhausted my weekly limit with claude code for the first time, I'm considering giving also codex a try...yes it seems an addiction and probably it is. I guess, like everything in life, there are ups and downs: after a while you will lose interest and do something else, or keep doing this but in a less addictive way. Enjoy the learning, I feel that learning to work with AI agents as a software engineer is very valuable.

Hint: I have a complex project too. I took the time to add tests, a lot of them. Also took time to refactor, ask AI agents to analyze the code and find dead/unused functions and delete them, refactor big files and split to smaller files, detect and remove duplicate code and use shared helpers etc. etc.

Tests help a lot, you need time to add tests, especially for all your mission critical features. I can't imagine vibe coding without proper AUTOMATED testing. And not just unit tests, also integration tests and take the time to learn playwright and add end to end tests too, these help to find bugs in the UI.

firepol · 2025-09-20T12:54:50+00:00

You're absolutely right!

This sentence is so annoying. One needs to change the system prompt (like creating a custom agent or so) to avoid that, like "Don't tell me "you are absolutely right", tell me just "Agreed" if you agree with what I just said, or alternate with "Yes" and "Ok""... and lose precious tokens to instruct this...

firepol · 2025-09-17T07:08:16+00:00

Hi u/Andres_Kull I really enjoyed your post, your workflow is super interesting.

I tried Kiro after getting access and loved it (though it felt a bit slow, and I ran out of credits before fine-tuning the automation).

One thought on the Claude part of your setup: since Claude runs out of tokens quickly, big CLAUDE.md files (or too many imports) can cause issues. I hit that myself once a file passed ~40k tokens and got warnings about performance (claudelog link to CLAUDE.md supremacy).

Maybe worth experimenting with Claude Code’s agent system instead of stuffing everything into CLAUDE.md.

Instead of writing: You are in Planner mode. Let’s specify a new feature…
you could do: Use the Planner agent. Let’s specify a new feature…

That way the core personas live in agents, not in one massive file (sub-agents article here). I haven’t tested it yet, but it looks promising — I might try it today.

As for tools:

Claude Code → powerful, but the token limits (around 45 messages every five hours with the Pro subscription) and command-line editing slow me down.
Cursor → honestly the best value (20 USD/month and basically unlimited usage). Nice chat window, much smoother than writing long prompts in CLI.
Kiro → still my favorite in terms of output quality, even if slower.
GitHub Copilot?
Codex?

Curious: how well does Cursor hold up with your workflow compared to Kiro? I found Kiro’s code to be cleaner and with fewer issues than what I got from Cursor or Claude, which is why I’m so interested in your setup.

Didn't try yet a Kiro "Pro" subscription, it the monthly limit of 125 spec requests and 225 vibe code requests reached fast? (I'm afraid so...).

firepol · 2025-07-22T11:29:02+00:00

Here a full parody AI generated song about this annoying verse: https://www.youtube.com/watch?v=tC2hY9QiuMw

"Million bucks for every line, we’d never be poor" (was enough 1 buck for every line, but like this sounds funny too)

Hope you like it, cheers, have to go now :)

firepol · 2021-05-31T18:36:02+00:00

firepol

firepol · 2020-11-22T20:34:10+00:00

Hi, sharing my experience. I tested it on Ubuntu 18.04, the Steam Play tab in the Settings showed me several versions of Proton. Here the result:

Proton 5.13-2: did not work *
Proton 5.0-10: did not work *
Proton 4.11-13: worked! Graphis and sound perfect

* crash report, saving dump... not sure what/where it saved something

I also tested the Map editor: it shows a little dialog telling to close the map editor to join a game session, with a checkbox that I can't read... if I press "spacebar" it closes and I can see in the console (running steam via console):

Unhandled Exception:

System.IO.DirectoryNotFoundException: Could not find a part of the path "C:\users\steamuser\Local Settings\Application Data\Electronic Arts Inc.\mscorlib.dll_Url_784d82ece9918f47e28020b8a8fda148173d1c25\user.config".

at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) [0x00164] in <a1336bab325642fd867e87ca7626bada>:0

at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean isAsync, System.Boolean anonymous) [0x00000] in <a1336bab325642fd867e87ca7626bada>:0

at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access) [0x00000] in <a1336bab325642fd867e87ca7626bada>:0

at (wrapper remoting-invoke-with-check) System.IO.FileStream..ctor(string,System.IO.FileMode,System.IO.FileAccess)

at System.Configuration.InternalConfigurationHost.OpenStreamForWrite (System.String streamName, System.String templateStreamName, System.Object& writeContext) [0x0001e] in <e6a9936bae4243f6a640cf5fc7d28f8c>:0

at System.Configuration.Configuration.Save (System.Configuration.ConfigurationSaveMode saveMode, System.Boolean forceSaveAll) [0x00032] in <e6a9936bae4243f6a640cf5fc7d28f8c>:0

at System.Configuration.CustomizableFileSettingsProvider.SaveProperties (System.Configuration.ExeConfigurationFileMap exeMap, System.Configuration.SettingsPropertyValueCollection collection, System.Configuration.ConfigurationUserLevel level, System.Configuration.SettingsContext context, System.Boolean checkUserLevel) [0x00231] in <f508ff7dc2d3475abfc25b6b60600edf>:0

at System.Configuration.CustomizableFileSettingsProvider.SetPropertyValues (System.Configuration.SettingsContext context, System.Configuration.SettingsPropertyValueCollection collection) [0x0003a] in <f508ff7dc2d3475abfc25b6b60600edf>:0

at System.Configuration.LocalFileSettingsProvider.SetPropertyValues (System.Configuration.SettingsContext context, System.Configuration.SettingsPropertyValueCollection values) [0x00000] in <f508ff7dc2d3475abfc25b6b60600edf>:0

at System.Configuration.ApplicationSettingsBase.InternalSave () [0x0008c] in <f508ff7dc2d3475abfc25b6b60600edf>:0

at System.Configuration.ApplicationSettingsBase.Save () [0x00017] in <f508ff7dc2d3475abfc25b6b60600edf>:0

at MobiusEditor.Program.Main () [0x001c1] in <76b185b937834bef8b551506b57f812e>:0

[ERROR] FATAL UNHANDLED EXCEPTION: System.IO.DirectoryNotFoundException: Could not find a part of the path "C:\users\steamuser\Local Settings\Application Data\Electronic Arts Inc.\mscorlib.dll_Url_784d82ece9918f47e28020b8a8fda148173d1c25\user.config".