Guided build · an evening
Home inventory & warranties
Photograph your stuff and receipts; search 'where did I put it' and track warranties.
You will build this by describing what you want in plain words, in your own language. Claude writes the code; your job is to describe the result well and check it. Here is the whole path, start to finish.
Photograph your stuff and receipts; search 'where did I put it' and track warranties.
First, how to actually talk to the agent
- 1Describe the RESULT, not the tech: what's on screen, what each button does, what gets saved. The agent handles the 'how'.
- 2Be concrete about screens and fields — 'a form with amount, category and date' beats 'let me add expenses'.
- 3Ask for the smallest working version first. You grow it by talking afterwards — that's Step 2, not the first message.
- 4Decide what's YOURS, not the agent's: name the categories, colours, rules. Don't make it guess what only you know.
Step 1 — Build it live
Prompting for this kind of tool
- 1Pin down THREE things in the ask: what ONE item holds (name, room, exact spot, cost, warranty end date), what the MAIN screen does (a search box that finds an item as you type), and that there's a 'warranties ending soon' section. Without those three, you get a dumb list.
- 2Spell out the search rule yourself: 'I type drill and it shows me the drill instantly' — say it matches the name AND the room, so 'garage' also pulls up everything in the garage.
- 3Say 'everything stays on my device, no accounts, no cloud' — an inventory of your stuff and what it cost is private; don't let it bolt on a login.
- 4End with: 'build the whole thing, check that it works, and tell me exactly how to open it.'
claude
Open the terminal and run this (if Claude is already running, type /exit first). Then ask it to make a folder for this project and work inside it.
Say it in YOUR language — Russian, Spanish, anything. Claude understands.
Build it now — tick as you go
0/6Step 2 — It's built. Now make it yours
Don't panic at the techy link. Claude tells you one of two things. Either a file like index.html — find it in your project folder and double-click it; it opens in your browser. Or a web address starting with http://localhost — copy it into your browser's address bar and press Enter. 'localhost' just means 'this is running on your own computer right now'. That's your tool. It's real.
Now tweak it until YOU like it — just talk
This is the part that makes it YOURS. Don't accept the first version — change it by saying what you want, right there in the same chat. Claude rebuilds and you refresh. Keep going until it fits how you actually work. For this tool, try things like:
I don't type long messages. I open voice-to-text (the mic in ChatGPT, or your phone keyboard), and just TALK through everything I think about what it built — what's wrong, what I want next — then select-all, copy, and paste the whole brain-dump into Claude Code. Messy spoken thoughts work fine; the agent sorts them out. It's several times faster than writing.
Step 2.5 — Test it like a real thing (it won't be perfect first try)
The truth no one tells beginners: the first build is a DRAFT. The agent makes something, you run it, you find what's off, you tell it — and THAT loop is the actual work. Don't read the code. Use the tool like a stranger would and watch where it lets you down. For this tool, check exactly this:
- 1Open it (Claude gives a localhost link or an index file — see Step 2) and add THREE items in different rooms, one with a warranty date a couple of weeks away.
- 2Type part of one item's name in the search box — does it filter down to just that item as you type? That's the whole point of the tool.
- 3Look at the 'warranties ending soon' section: did the item you gave a near date show up there, and the others stay out? If everything shows or nothing shows, that's your first fix.
- 4Refresh the page (F5 / Cmd-R). Are all three items still there? If they vanish, 'saves on my device' isn't wired up — fix that next.
- 5Edit one item's room, then delete another. The list should update and the deleted one should be gone for good — that confirms edit/delete works.
Found something wrong? Say it like this
You fix nothing yourself — you DESCRIBE what's wrong in plain words and the agent fixes it. Be specific: what you saw vs. what you expected. Real examples for this tool:
Don't stop at v1 — grow it
A tool you built in ten minutes is a starting point, not the finish line. The people who get hooked keep saying 'now also…'. Each line below is one sentence you paste into the same chat to level this tool up:
Step 3 — Connect it to the world (optional)
Free data & APIs for this one
An API is just how your tool pulls in outside data or sends things out — many are free. You rarely need to research them yourself; the move that works for ANY idea is to ask the agent to find them:
- 1To start you need NO external API — the list, search and warranty math all run locally on your device.
- 2Photos don't need an API either: ask for 'let me add a photo from my phone and store it with the item on my device.'
- 3Reusable move for ANY idea: ask Claude — 'look up free or open APIs that fit a home inventory tool and tell me which actually need a key.' It will list them; you pick.
About paying for the AI parts
- 1Building the tool with Claude Code is covered by your Claude plan (Pro, Max, Team or Enterprise) within its usage limits.
- 2If the finished tool itself should call Claude (for example to write texts for you), it needs its own API key from the Claude Console, and that use is paid separately, per use.
- 3Prices change; check claude.com/pricing before you plan anything that runs often.
A tool gets superpowers when it can talk to other services — send you a message, read a sheet, pull live data. Each service hands out an 'API key' (a long password that says 'this is me'). For THIS tool, the useful ones are:
Which keys this tool can use
- 1Telegram — get a reminder message a week before any warranty runs out
- 2Gmail — email yourself a backup of the whole inventory list
Getting a key works the same almost everywhere: log into the service → Settings → 'API' or 'Developers' → 'Create key' → copy it. Then ask Claude: 'create a .env file with an empty spot for this key and check that .env is in .gitignore', and paste the key into that file yourself. Do not type the key into the chat.
Step 4 — Put it online (only if someone else needs it)
So if something gets stolen or burns, your inventory and receipts aren't lost with the house.
Buy a server and a domain — like ordering groceries
- 1Server: first ask Claude 'create an SSH key for my server and show me the public part'. Then sign up at a host (Hetzner, DigitalOcean…), click 'Create Server', pick Ubuntu, the cheapest size and login with an SSH key, and paste that public key. Save the IP address it gives you. It costs a few dollars a month and you can delete it any time.
- 2Domain: buy a name at any registrar (Namecheap, Cloudflare…). Then add ONE 'A record': Type = A, Host = @, Value = your server's IP. That's the whole DNS part — ignore every other field.
- 3Hand it to Claude: back in your terminal, say: 'deploy my project to my server. IP: <the ip>, login with my SSH key, domain: <yourname.com>. Set up HTTPS and basic security.' Claude connects with the key, installs everything, secures it and makes it live. No password goes into the chat.
- 4DNS can take minutes to a couple of hours to wake up — if Claude says the domain isn't answering yet, that's the wait, not a mistake. Come back later and say 'try again'.
Step 5 — Keep your keys (so you can come back)
Save the server's IP and your domain in your notes. The SSH key stays on your computer; keep a backup of it. Then ask Claude: 'write in CLAUDE.md how to deploy this project to my server'. No passwords go into that file, and any later day Claude can update the site with one sentence: 'deploy the update'.
Step 6 — Stay safe (two easy habits)
- 1Back up anything you'd hate to lose. If the tool holds real data (your budget, health log, client list), ask Claude early: 'add an export/backup button' — one click saves your data to a file. Do it before you ever rebuild from scratch or move the folder.
- 2Don't hand Claude the keys to dangerous rooms. Keep it pointed at this project's own folder. Never connect a learning project to your bank, your crypto, or anything irreversible. Receipts and calendars — yes. Savings — no.
- 3Think before you ask. Claude does what you say in the folder you're in. 'Optimize my photos' optimizes them; it won't delete them — unless you ask for something reckless. Sane requests, clean workspace, and there's simply nothing scary left.
The mistakes that stop most people
- 1Asking for something vague ('make me an app') and getting something vague back. Name the screens, the buttons, what gets saved.
- 2Cramming in ten features at once. Ask for the tiniest working version first — then grow it with follow-up requests.
- 3Stopping at the first error. An error isn't failure — paste it to Claude or describe what you see, and it fixes it. That loop IS the work.
- 4Deciding you need to 'learn programming first'. You don't need to understand the code Claude writes. You need to describe the result.
- 5Not saying what 'done' means. End the request with how you will check it, for example 'done when I can add an item and it is still there after I reload the page'.
- 6Building for an imaginary audience. Build the version YOU will open tomorrow. Polish never; use immediately.
Normal. Tell Claude what's wrong in plain words ('the button does nothing', 'the page is blank') or paste the red error text. It finds and fixes it. You check. Repeat until it works.
That's it. You built a real tool.
You described the tool in words, Claude built it, and you checked it yourself. That is the whole loop, and it works the same for bigger tools.
More to build