The AI repaired my broken file. It opens now.
A file of his broke in a format with no documentation, after the app crashed while he was typing a ratio. He threw the file at the AI, it repaired the file and sent it back, and the file opens now.
A random mix from the whole library. Shuffle for a new set.
Hobbies
Making things, learning and having fun · 960 ideasGPT is formalizing a researcher's papers in Lean, about 3000 declarations in
A mathematician is using GPT-6 Astra to formalize results from his papers in Lean. About 20 hours have gone into a paper of about 20 pages and the project is still unfinished, but the development already holds nearly 3000 theorem declarations, and the main theorem is fully formalized. Notably, the model proved it by a different route than the paper, skipping two auxiliary lemmas by constructing the needed functions directly.
This only partly worked. Worth knowing before you try it.
Source and order the parts for my DIY bag charm
A creator building a pink DIY bag charm that shows time and weather had the AI source, compare and — after her approval — order an OLED screen, ESP32 board and LiPo battery. The finished charm is shown working on her handbag.
A frontier model decoded an old multimedia game and put it in a browser in 2 hours
Had a frontier LLM decode an old Director game and port it to run in a web browser in about 2 hours, reusing existing OSS libraries.
2 hourssaved
Opus finished the circuit board that had sat 90 percent done for 6 months
Opus finished a first PCB that had sat at 90 percent done for 6 months.
Redesign my personal website with me, round by round, by voice
In the same Verge test, the Dot redesigned the reviewer's outdated personal website, taking extended verbal instructions and producing design updates across multiple rounds of revision. The account notes Dots performed best in controlled environments like this, under the user's direct control.
A local model with full access to his PC organises his files and writes its own helper tools
His local Qwen agent computer with full PC access does file organizing, analyzed his local data and wrote several small tools to manage it automatically, coded a KDE widget for VRAM model swaps.
Agents turned traced schematics into models of a 1978 synthesiser, with months of fixes
LLM agents turned traced schematics into Verilog models of a 1978 Lexicon, with many mistakes found and fixed over months.
This only partly worked. Worth knowing before you try it.
I built a set of scheduled skills that run my money, shopping and calendar
On a free year of the AI he has built and scheduled a stack of personal skills: a calendar manager, an expense tracker fed only by emailed invoices with his full history backfilled, a monthly utility cost comparer, and shopping re-up tracking that watches how fast he uses things like coffee beans and toilet paper and schedules the next buy. A weekly skills manager rates all the others and suggests improvements.
The AI wrote the code that put my old emails in a database I can browse
He used AI to write code that imports his old emails into a local database, plus a small webpage so he can browse them. The job took an afternoon instead of a couple of days.
My agent builds me a daily podcast feed with the ads cut out
A listener had the AI build him a personal podcast feed he follows in his podcast app. Each day it looks for one episode he would actually enjoy, based on his taste and recent talks, and skips the day if nothing is good enough. It downloads the pick, writes out the words locally, finds the sponsor blocks and cuts them out, checks the joins, and adds the episode to his private feed with a note on why it was picked.
Listed a house for rent on Marketplace and got it rented in
Rogaz24's the AI listed his house for rent on Facebook Marketplace, replied to all the inquiries, scheduled the viewing appointments, and posted them to his calendar. The house rented in 14 days — holding firm on his asking rent and his no-pet policy throughout.
Ten days and 40 attempts could not move his chats out of encrypted backups
Had the AI pull encrypted WhatsApp backups via ADB, decrypt them and go through the database row by row over 10 days and about 40 attempts trying to move chats from Android to iOS; gave up and kept the old phone as a companion device.
This one went wrong. See what happened before you try it.
Built a sticker maker with AI and the AI. The stickers are on sale.
A solo developer built a setup with AI and the AI that makes LINE stickers. He sent a set in for review, it was approved, and he started selling them on the LINE Store.
The AI built a browser for classic Macs for the old web protocol that still works
The AI built him a Gopher browser for Classic Macintosh systems, published on GitHub to replace the clunky TurboGopher he used before.
His bot files his spam text complaints and got Twilio to act
He pointed his bot at the spam texts his carrier ignored. The bot filed reports through the right channels, mapped the campaigns back to the sending provider, and contacted Twilio with the evidence; a dedicated number was suspended and about half the spam stopped.
GPT scans his computer for new security flaws and patches it
He gave GPT a security audit skill that checks his machine against newly published vulnerabilities, patches what it can, and warns him about the rest. He runs it whenever new CVEs land, and says the patches need care because a fix can cause as much trouble as the flaw.
Set up recurring Instagram posts — it stopped to ask about standing permission
Founder Jessica Wells asked the AI to post to her Instagram every Tuesday and Thursday; instead of executing, it surfaced a permission prompt asking whether she wanted standing authorization or per-post approval. Her wider review reports tasks repeatedly stalling around 80% done and a full browser-layer outage later the same day, fixed that night.
This only partly worked. Worth knowing before you try it.
Generated a 333-page history book, burning 8M of the 1B free launch
Long-form document generation at a scale that consumed 8 million tokens — 0.8% of the 1-billion-token launch grant — in a single week.
I cannot code, but I shipped a working game patch in 30 minutes
He is not a programmer, but he used AI to trace a bug through localization files, tech scripts and the game's internal category system. The AI hotfixed a deprecated modifier key in his Clausewitz engine mod, and he shipped a working patch in 30 minutes.
I had the AI build me a Lightroom replacement and dropped Adobe
He says he cannot code, but he used AI to produce a working replacement for Lightroom for his own photo work. It works well enough that he ditched his Adobe subscription.
Generated a full Jeep-restoration video production plan from a pasted Instagram link,
A Hindi-language screen-recorded tutorial (170K followers) showed the AI’s 'Today' panel with tasks like 'Build Jeep demo video' and 'Create EX demo video.' The speaker pasted an Instagram link into chat and the AI produced a detailed production plan for a Jeep restoration video — rust removal, sanding, olive-green airbrush, chrome detailing, turntable reveal — plus optimal posting time (7-9 PM IST), title length guidance, and hashtags like #RustyJeep. The framing: copy any video link, paste into Mu
Execute obfuscated code hidden in an email it was asked to fetch
Salt Labs emailed an AI-connected Gmail account with instructions encoded in JSFuck punctuation-only obfuscation; asked to fetch the user's email, the AI decoded and executed the payload in its own server environment, which researchers escalated to a reverse shell. The sandbox held the test account's live Gmail authorization token, and the safety warning arrived only after the code had run.
This one went wrong. See what happened before you try it.
I built my first app with AI. It emails what is new on my media server.
A man built LatestArr with help from the AI, his first real app. The self hosted tool collects what is new across Plex, Jellyfin, Emby and his book, audiobook and game libraries and emails a clean digest, and he shared it as open source and asked for testers.
He moved his external-brain agent from the AI to the AI, with a capture bot filing every link
A Japanese engineer's September 2026 operations update: he migrated his personal agent Mana, with its memory, skills and routines, from the AI to the AI, keeping the same Markdown-and-Git external brain, a vault of about 470 wiki pages. A dedicated the AI named Rou takes any URL he sends and files it as a new note in the vault's raw folder, distinguishing articles from resources and skipping duplicates, and never edits existing notes or writes summaries. Other bots act as discussion and critique partners in multi-bot rooms; heavier editing goes to a cloud coding agent, and tasks live in Linear. He published Rou as a public the AI template anyone can copy.
The AI designed a VGA circuit, the board was made for $6, and it works
A maker had the AI design a circuit that shows a picture stored in a memory chip on a standard VGA screen, using common logic chips, and write the chip code for it. He routed the board himself, had it made for $6, fixed the one missed error with a wire, and the board works.
$6one time
An NBA stats warehouse built without him writing any of the code
Building an NBA stats warehouse without writing any of the code; the agent wrote it.
Cowork consumes 100% of usage limit after every reset with no visible tasks
A subscriber reports the AI burns through 100% of their usage limit after every reset while showing no tasks running anywhere in the product. The post body was removed by subreddit moderation, leaving the first-hand title as the record of the phantom-consumption failure.
This one went wrong. See what happened before you try it.
The AI revived the music app port that lets his Linux machine play his library
The AI updated apple-music-for-linux so it works again.
Turned pantry items into a $30/week meal challenge for a family of
Creator took on a $30/week family-of-4 budget challenge with AI, asking it to start from what she already had in her pantry. The AI produced 7 dinner ideas, a grocery list, and a price comparison; her Walmart haul came to $29.66, under budget.
$30
Every idea is a real post from someone who tried it, summarized in our words, with a link to the original. App names are swapped for plain words.