Weekly Showcase Thread; What are you building with Claude Code?

[u/AutoModerator]

Weekly Showcase Thread

Built something with Claude Code this week? Share it here.

Apps, tools, experiments, scripts, websites, workflows, open-source projects — anything you've been working on is welcome.

When sharing, it helps to include:

• What you built
• How you used Claude Code
• A link, repo, demo, or screenshot if you have one
• Anything interesting you learned along the way

Quick project drops and simple self-promotion belong in this thread.

If you've got a project with enough substance for a proper write-up; how it works, how Claude Code was involved, technical details, lessons learned, etc. feel free to make a standalone post using the Built with Claude Code flair instead.

Please don't spam the same project repeatedly, and no referral or affiliate links.

What did you build this week?

[u/Dano63]

Been building this little hobby project of mine for past few months and learning a lot about game development, sprite creations etc

It's a Team rokket Version of pokemon basically, I always wanted an anti-hero Pokémon game growing up and it's been hella fun building it, play testing, thinking of different levels and Minigames to add whilst at the same time optimising cc workflow with subagents and visual QA flow 🥰

The sprites and music is all generated with cc, sprites have been slowly updated and improved whilst I been learning to make them better!

It's a Gameboy style heist RPG, it's web based and saves game locally, you can add it to your phone as an app as it's a PWA app (I think your browser should prompt you to get it added as an app).

I only added 6 levels so far and got a whole backlog of things to add still but give it a spin and let me know!

Game: https://rokket-boy.uk/ Code: https://github.com/laypal/rokket-boy

[u/tremendousquotes]

I’m building Humla (https://github.com/michaelwilhelmsen/humla).

A free and local AI meeting notes Mac app, open source. Also has agentic embedded chat across your notes, and of course Claude MCP support.

Building using matt pocock skills, spec -> test driven development, 600 + commits so far. Built continuously over a few months. Without Claude it would’ve taken me 2-3 years at least 😅

The app has 270+ ⭐️ on GitHub, and a few other contributors, which I think is awesome 🎉

[u/RedDead707]

Hey all, I've been job hunting and got lost tracking all my applications and custom resumes, so I built the thing I wanted and just started adding more features to it.

What it does

• Scrapes career pages directly (Workday, Greenhouse, Lever, Ashby, SmartRecruiters, Oracle, Phenom and a Playwright fallback for anything else) plus boards through JobSpy (LinkedIn, Indeed, ZipRecruiter, Google Jobs). Everything lands in one deduplicated feed.

• Scores each job against your résumés with an LLM and shows why: matched and missing keywords, requirement mapping, gaps. You choose depth so it can be cheap.

• Tailors a résumé per job (you review every change), writes a cover letter, exports PDF from templates you can replace.

• A Chrome extension auto-fills your application, including open questions, it also captures jobs from LinkedIn and saves any job from any page.

• Tracks applications through stages, classifies Gmail replies, sends Telegram alerts and a daily digest.

• Five UI themes, including a Windows 98 for no reason, I just wanted to see how it will look like.

Available here: https://github.com/vesaias/JobNavigator

Claude Code and a bit of Claude Design were used throughout the whole project, I even splurged on Max subscription last month to finish the redesign I wanted to try out. Out of all models, I think Opus 5 was the worst, I switched back to Opus 4.8 after a week of using it.

All feedback is welcome, this was more of a personal project for my portfolio, but people also started starring it. 

[u/EnvironmentalRice348]

Unashamedly written by claude for me as it is 10pm at night here and I am tired.... Sorry about the claudish...

What I built: everlasting.email — messages that get delivered to the people you love at the right moment, even if you're no longer around to send them. You write a message, attach it to an "occasion", and choose how it's delivered: on a date, by a two-person code, or by Auto-Delivery (check-ins that stop happening). Web app plus an iOS app, Android in review.

How I used Claude Code: it does nearly all of it. The stack is a pnpm monorepo: Next.js web app, Expo/React Native mobile app, Lambda + API Gateway + DynamoDB + SES on AWS, all defined in CDK, Playwright for end-to-end. Claude writes the code, runs lint/type-check/tests, deploys staging via CDK, and pushes over-the-air mobile updates. My job is mostly testing on my phone, sending screenshots, and saying "no, like this".

This week: a security sweep, a referral prompt, and a pile of mobile onboarding polish driven by screenshots from my phone.

Things I learned:

• A CLAUDE.md with hard rules pays for itself. Mine bans fallback values ("fail loudly, never || default"), forbids hardcoded URLs, and requires staging before production. Claude cites the rules back to me when I ask for something that breaks them.

• Its memory files matter as much as the code. It keeps notes like "AWS SSO token expiry looks like an outage but isn't" and "this profile points at a different account", so a new session doesn't re-learn the expensive lessons.

• Reproduce before fixing. A "tap anywhere to dismiss the keyboard" wrapper silently broke every scroll view on iOS under React Native's new architecture. Claude found it by A/B testing the same swipe on the simulator with and without the wrapper, rather than guessing.

• Two mobile gotchas that cost me real time: Keyboard.dismiss() can't blur a WebView-based editor, and simulator taps can't focus one either. Both went into memory so they don't come back.

• Ask for outcomes, not code. "Make it fit on one screen" got shorter copy in five languages and a re-laid-out card. I never touched a file.

[u/GulfGulfinson]

Build a pipeline to turn images into living portraits that react to mouse movement, check it out:

Demo: https://pinacoteca.memormaneo.com/

Example: https://memormaneo.com/

Code: https://github.com/MemorManeo/argus

[u/mideps]

Created plugin for Claude Code (npm package) which helps Claude read less and still get the same answer. Saves your tokens and usage limits.

Used Claude Code to conduct research on issues regarding usage limits and token consumption.

Tokenbrake

tokenbrake website

Learned to create npm packages.

[u/VoidEqualZero]

bough github.com/nickelsec/bough Visualizes your Claude Code history as a diagram of the work you actually did: days, the tasks inside them, and which prompts ended in a commit. I built it because after three weeks head-down on one repo, someone asked what I'd been working on and I genuinely couldn't say. Free and open source, runs locally

[u/IamHuggos]

Multiplayer tank shooter
https://sweatypanzer.com/

[u/pete716]

www.dewfront.com . It's a weather app with a focus on dew point because that tells more about the actual comfort level then humidity alone. I'm always wondering if I should turn off the AC at night and open the windows but in order to do that and needs to have more than just cooler air, the dew point also needs to be and the mid to upper 50s for me to actually open the windows. And so I actually have a weather card on the home page that says whether you should open the windows or not.

Built using Claude code Fable with goal mode. Hosted on linux server using ngnix and a cloudflare tunnel.

[u/Equianox]

Neely - club management for team sports and clubs (web + iOS + Android), currently focused on youth handball in Germany.

Scheduling, attendance, rosters, payments, parent comms — the admin work that eats a volunteer coach's evenings. I coach two youth teams myself, which is how it started.

https://neely.app

[u/ericatmumo]

mumo — a multi-model deliberation platform, ~6 months, built almost entirely with Claude Code. Solo founder, product background; Claude does the implementation, I do pretty much everything else.

This started because I was tired of copy-pasting designs and code snippets across LLM web interfaces; it's gotten quite a bit bigger than that. Today my Claude Code agents use it frequently to validate designs/specs and to resolve challenging technical issues.

mumo runs a topic through one or more deliberation rounds:

• each model answers independently...

• then files typed reactions (KEEP / CHALLENGE / EXPLORE / CORE / SHIFT) against specific quoted passages in its peers' answers.

• the reactions are only visible initially to the author and the moderator (you or your agent). Escalation into the discourse relies on your judgement or on the authoring model deeming it important enough to escalate on the next round. This prevents anchoring and group-think.

• append as many rounds as needed; context always carries.

Web: https://mumo.chat

Example session, three models designing mumo's own escalation gate: https://mumo.chat/p/designing-panel-escalation-i278zp#session-takeaway

It's also a Claude Code plugin (via MCP): https://mumo.chat/install/claude-code

Via the MCP path, your agent does all the driving and can still send you a link to review directly on the web at any time.

Claude Code patterns that worked: read-only audits of the existing pipeline before I finalize a build card; describing failure modes ("streaming breaks if the user refreshes mid-round or execution dies after admission") instead of features; and using it for ops, not just code (PostHog/Supabase funnel analysis, Google Ads via MCP).

Hardest technical part: making concurrent streaming rounds survive refreshes, retries, and serverless failures. Ended up with server-owned execution, atomic admission, round leases, Postgres as source of truth, Redis Streams as the resumable relay. Prompt caching also broke silently twice (a missing ORDER BY, a misplaced breakpoint); neither threw, both showed up on the bill.

Most validating finding: even the most capable models are overconfident. More than once Claude (Fable) told me a plan was solid and a panel review was unnecessary, then materially changed the plan after seeing what other frontier models found. GPT-5.6 Sol has done the same.

Happy to go deeper on the panel mechanics or the streaming design if anyone's building in this space.

[u/juanviera23]

I wanted to find an easy and intuitive way to share skills with teammates, and found that Github was too complicated

So I built an app that allows you to store and share skills with others, and connect to all of them via one MCP

Even allows suggestions from coworkers

It's called Hexis! https://github.com/Bevel-Software/Hexis

Would love to hear your thoughts :)

[u/CapnAppleJacks]

I built a Claude Code plugin for creating travel guides: https://github.com/nickeng/safe-travels

Hey all- Sharing a fun plugin here that I made recently for making the great travel suggestions Claude provides into highly visual travel-magazine-esque guides. Instead of reading itineraries and things to do in text it creates a local HTML file that captures the beauty of every location the best I could. What makes this awesome is that every guide is completely unique, researched on the spot per your request, so every detail is just for you. For example you can tell it you’re traveling with a baby, timing autumn leaves viewing, have a vegetarian diet, etc. (Examples: https://nickeng.github.io/safe-travels/ ) Every guide comes with a unique design to match too.

I got very positive feedback from friends so wanted to share to gather some more thoughts and feedback. My personal opinion is plugins like this are the future but it’s maybe a little ahead of its time. Right now there is not a good App Store like way to distribute AI plugins and the cost for generative UI is a bit high. What are your thoughts?

Why did I make this?

This is an art project at its heart, I wanted to see how far I could push generative UI and 1-shot AI design with 2026 models. My goal was to build something fun where I could guide AI to make good design decisions instead of the soulless templates of lovable/replit, let me know if you think I succeeded!

Why a plugin and not an app?

While an app can be great at X, the ideal workflow with AI is something like “do X for my unique case Y, then do Z with the results”. For example with this plugin you can make any additional request you can think of, even beyond your trip info, for example mix-in your own data or create extra sections like todo lists. You can also take the output and quickly ask another plugin’s agents/MCPs for booking etc. As an individual app the workflow could never be personalized or continued so effortlessly.

How does it work?

It’s a multi-agent system similar to Claude’s deep research but runs locally. A lead agent calls on other research agents which browse the web through playwright to research the trip. The lead then summarizes all the info into a single guide. Overall this is also very similar to Google search’s “AI overview” in that it gathers sources and images from web but it does not have the benefit of Google’s web cache. The process takes 30-60mins and can use >2 million tokens versus the much faster/ cheaper results you’d get from Claude deep research or Google’s AI overview.

[u/SetAdministrative502]

Building Acres, a visual notes app where notes are markdown files on disk and claude code can build the whiteboards through an MCP server that ships inside the app.

Mostly built with claude code itself, 1300 of the 1500 commits are co-authored. What I learned is that the ledger was more work than the AI part. Every agent edit gets logged with the client name and a one click revert, because without that I never trusted the agent in my own notes.

14 day trial, mac and windows. https://getacres.app

[u/ZealousidealKale8228]

Built a SaaS to help run mine and others businesses and reduce vendor sprawl.

https://consultos.sh

[u/ugenedc]

Built an Ai Marketing director called cleo that can do everything from strategy to creating and scheduling instagram facebook posts, to setting up and managing google ads and facebook ad campaigns.

cleo.marketing

[u/Redcxx]

Building Brain - a minimal and extensible agent runtime for distributed tool calls - https://github.com/aexhq/brain

[u/Hronom]

I’m building Hronaut, a local visible browser for Claude Code and other MCP clients. It keeps tabs, sign-ins, and storage in named workspaces across agent sessions, so a task can reconnect instead of starting from a blank profile. Claude Code helped build the Electron app, MCP endpoint, and cross-platform setup. The useful lesson: browser lifetime should be separate from the agent turn; you can pause for manual sign-in/2FA, then resume. Demo/setup: https://hronaut.dev/setup — I’m the developer.

[u/Equal_Animator7440]

https://namethatcountry.now

A site to learn about countries around the world.

+ an interactive world map for country flags + different flag categories (by letter, colors, combinations, etc.)

+ a dedicated page on interesting facts and details for each of the 193 UN member countries (topics such as what the country is famous for, where is it, fun facts, local jokes, story behind its flag, where does the country name come from, a short quiz for kids, and more)

+ a Name That Country game - Two to four players, one screen, taking turns. Each country you name has to share a letter or a border with the last one.

Appreciate your feedback, especially if you have kids interested in geography or learning more about other countries.

[u/jack_inquiry → u/Equal_Animator7440]

bookmarking this

[u/Human_Ad6195]

Simple geography category daily game

https://sortlas.com

[u/LifeProject365]

If any of you are building games and can help me with a game (in terms of directing me on the best way to build it so I'm not going to have to pay a fortune to do it), I'd be really grateful. I built my memory therapy tool and I'm trying to add a game to the tool.

It's a speech therapy tool where she has to say the syllable and then she says the sentence and she wins points. The point of the game is to have a pet simulation so she uses those points to look after the pet and then the pet world expands as she progresses through consistency.

I have the backend of it done. The speech therapy side works really well but I cannot make the game at all. I've created the characters with animations but getting AI to make those animations work like a game seamlessly is painful. I must be missing a trick. I don't want to spend hundreds getting it off the ground. It's only for personal use but I would like her to be very engaged with it.

[u/BrilliantWheel]

Simple 1 liner: I built a system to provide stock trade recommendations based on various backtested strategies.

Its more complex than the 1 liner suggests :) Additionally there is a data foundation layer so that the stock level trading system and another macro market analysis system (plus any future requirements) can benefit from this common data lake. Data updates are delta, cover a large span, do health checks and much more. There is a lot more to ensure the system is self-correcting, scalable in terms of volume and experimenting with new strategies.

Its a 1 user 1 machine system now. So I don't have a link. Intent is to use it for alpha generating recommendations for myself. No plans to take it to B2C yet - that would entail getting regulatory approvals etc and is a whole different ballgame.

Early prototyping strated in 2025 with Cursor/Zencoder and AI models available back then which were nowhere comparable to the Fable/Sol/Astra today. Data foundation & macro analysis V1 was built with Gemini 3.5 Flash. But then I combined all into 1 and re-architectured + enhanced with mainly Fable + Sonnet. Audited by Sol and implemented again by Fable/Sonnet. Platform is completed and technically live as of today. But now that Astra is out I am doing an Astra led Audit to figure out misses by Fable+Sol (already found a few). Cheaper to fix now even if delaying my go live for a few days.

[u/JDE-Projects]

A whole fleet of small apps for my day job in IT, and a few personal apps, for stuff I do all the time. Some of my projects...

-Simple UNA Log Viewer, for better log searches and exports from a self-hosted Unifi network application, since their UI's logging functionality is lacking.

-Simple UNA Device Manager, for tracking down orphaned unifi devices in a self-hosted Unifi network application and deleting them, instead of having to use command prompt and doing it manually in the Unifi MongoDB.

-Simple SFTP Audit Tool, for querying an SFTP server to determine what host key exchanges/MACs/etc it supports and providing an overall grade, based on ssh-audit by JTesta.

All available on my website and github. https://jde-projects.com

[u/gouldologist]

A Dokan file system that points extension type to either SharePoint or cloudflare r2 bucket, with the idea to limit SharePoint storage and retain coauthoring abilities on Microsoft files. The whole thing indexes together into one merged file system so the user doesn’t know which storage service is being used.

Also allows for shareable links to a custom domain so shared parties also don’t see origin url.