Guided build · an evening
Trip planner
A route, a budget, and a packing checklist for your next trip — tailored to you.
No commands. No code. You're about to build this by SAYING what you want — in your own language. The only skill is describing the result well. Here's the whole thing, start to finish.
A route, a budget, and a packing checklist for your next trip — tailored to you.
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
- 1Nail THREE things: the trip header (destination, start and end dates), the day-by-day list (each day holds activities with an optional cost, and I can reorder them), and the budget that adds up every planned cost and shows what's left. Skip the budget rule and you just get a notes app.
- 2Say it explicitly: 'the budget total updates the moment I add or change a cost' — otherwise the leftover number quietly goes stale and the tool lies to you.
- 3Decide the second panel yourself: a packing checklist where I tick items as I pack, with a count of what's left. Spell out that it's separate from the day plan so they don't get mashed together.
- 4Always end with the magic line: 'build the whole thing and tell me exactly how to open it; don't stop to ask questions.'
claude --dangerously-skip-permissions
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.
✕ what most people type
you ▸ plan my vacation
✓ what actually works — copy it, or better, say it in YOUR words
you ▸ Build me a trip planner for one trip. Up top: the destination,
start and end dates, and a budget field that adds up all my
planned costs and shows what's left. The trip shows as a
day-by-day list — for each day I add activities and places to
visit with an optional cost, and reorder them. A separate
packing checklist lets me add items and tick them as I pack,
with a count of what's left. Everything saves on my device,
clean readable look. Build the whole thing and tell me exactly
how to open it; don't stop to ask questions.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:
you ▸ show the days as a timeline instead of a list you ▸ let me plan two trips and see them side by side you ▸ add a country and currency so the budget shows my home currency too
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), set a destination and dates and a budget, then add a few activities across two days with costs on some.
- 2Watch the budget: does 'what's left' drop by exactly each cost as you add it? If the math doesn't match, that's your first fix.
- 3Drag to reorder activities within a day — do they actually stay in the new order, or snap back?
- 4Switch to the packing list, add a few items and tick a couple — does the 'left to pack' count go down correctly?
- 5Refresh the page (F5 / Cmd-R). Are your days, costs and packing items all still there? If they vanish, 'saves on my device' isn't wired up — fix that next.
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:
you ▸ 'the budget leftover doesn't change when I add a cost — recalculate what's left from all the activity costs every time one changes' you ▸ 'when I refresh the page my whole trip disappears — save the days, costs and packing list on my device so they stay' you ▸ 'I can't reorder activities within a day — let me drag them up and down and keep that order'
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:
you ▸ 'show the days as a horizontal timeline instead of a plain list' — so the shape of the trip is visible at a glance. you ▸ 'add the weather forecast for each day at the destination' — so the packing list and the plan match reality. you ▸ 'let me plan two trips and switch between them' — one tool for the whole year, not one per holiday. you ▸ 'add a country and currency so the budget shows both the local amount and my home currency' — no more guessing what a price really costs you.
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 itinerary, budget math and packing list all run locally on your device.
- 2For weather on your trip dates, OpenWeather and Open-Meteo both have genuinely free tiers (Open-Meteo needs no key at all) — great for 'show the forecast for each day so I pack right.'
- 3Reusable move for ANY idea: ask Claude — 'look up free or open APIs that fit a trip planner and tell me which actually need a key.' It will list them; you pick.
About paying for the AI parts
- 1You don't pay for Claude twice. With a Claude subscription you create an API key right in the terminal and use it inside your projects — within your plan.
- 2From June 15 the rule splits: automation through that key gets its own monthly credit — about $20 on Pro, $100 or $200 on Max. Stay under it and it works as before.
- 3Run out and you pay per use (pay-as-you-go); unused credit doesn't roll over. So check your account and see whether the included credit already covers what you're building.
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
- 1A weather service (OpenWeather) — show the forecast for your trip dates so you pack right
- 2Google Calendar — push each day's plan into your calendar
- 3Google Sheets — keep the itinerary in a spreadsheet you can share with travel companions
Getting any key is the same recipe: log into the service → find Settings → 'API' or 'Developers' → 'Create key' → copy it → paste it to Claude once ('here's my key: …'). Claude stores it and you never touch it again.
Step 4 — Put it online (only if someone else needs it)
So everyone on the trip opens the same plan and packing list from their own phone.
Buy a server and a domain — like ordering groceries
- 1Server: sign up at a host (Hetzner, DigitalOcean…), click 'Create Server', pick Ubuntu + the cheapest size + PASSWORD login. SAVE the IP address and password it gives you. (Don't be scared — it's a few dollars a month, cancel anytime.)
- 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>, password: <the password>, domain: <yourname.com>. Set up HTTPS and basic security, do it all yourself.' Claude installs everything, secures it, and makes it live. You configure nothing.
- 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, the password (or SSH key), and your domain somewhere safe — a notes app, a password manager. Why it matters: any day later you can open the terminal, connect to the server, start Claude right there, and keep improving the live tool by talking — fix a bug, add a feature, change the look. Tip: tell Claude 'save the server details in a file in this project folder' so a future chat already knows them.
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.
- 5Forgetting the magic line — 'build the whole thing, don't stop to ask questions' — then wondering why it keeps pausing.
- 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.
Notice what just happened: no commands, no code — words. This is the entire skill. The people who 'can build things' are just people who describe what they want and let Claude do the typing.
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