Val Town's 107-line llms.txt shows what thorough AI preparation looks like

# Val Town Documentation

## Getting Started
- [Your first scheduled cron](https://docs.val.town/quickstarts/first-cron.md): Make your first cron job - a weather notifier
- [Your first website](https://docs.val.town/quickstarts/first-website.md): Make your personal website
- [LLM prompting](https://docs.val.town/quickstarts/prompting.md): A guide to LLM prompting and using AI inside Val Town

## Vals
- [Branches](https://docs.val.town/vals/branches.md): Val Branches are used for feature development, testing, and sharing
- [Cron](https://docs.val.town/vals/cron.md): Schedules let code on Val Town run every day, every hour, or whenever you'd like
- [Email](https://docs.val.town/vals/email.md): A kind of val that is able to receive emails sent to it.
- [Overview](https://docs.val.town/vals.md): Learn about the basics of Vals
- [Val Limitations](https://docs.val.town/vals/limitations.md): Learn about the limitations of vals
- [Pull Requests](https://docs.val.town/vals/pull-requests.md): Pull Requests are used to merge changes from a branch or remix back into the parent
- [Remixes](https://docs.val.town/vals/remixes.md): Other users can remix your Val, and you can remix other user's Vals.
- [Basic examples](https://docs.val.town/vals/http/basic-examples.md): Examples of basic HTTP triggers for common use cases
- [CDNs and Cache Control](https://docs.val.town/vals/http/cdns.md): How to use Content Delivery Networks (CDNs) and cache control headers with HTTP vals
- [Custom domains](https://docs.val.town/vals/http/custom-domains.md): Point your own domains to any HTTP val
- [Custom subdomains](https://docs.val.town/vals/http/custom-subdomains.md): Choose custom subdomains of val.run for HTTP vals in projects
- [Early Return](https://docs.val.town/vals/http/early-return.md): How to return a response early from an HTTP trigger
- [HTTP](https://docs.val.town/vals/http.md): A kind of val that can serve a website or an API using web-standard Request & Response objects.
- [HTML & JSX](https://docs.val.town/vals/http/jsx.md): You can use JSX syntax in Val Town to render HTML using React, Preact, Vue, Solid, etc.
- [Routing](https://docs.val.town/vals/http/routing.md): How to implement routing within HTTP triggers to handle different paths and methods

## Reference
- [File I/O](https://docs.val.town/reference/file-io.md): How to read and write files in Val Town
- [Deno LSP](https://docs.val.town/reference/deno-lsp.md): Understanding the Val Town language server
- [Environment variables](https://docs.val.town/reference/environment-variables.md): Using environment variables to store secrets that vals can securely access
- [esm.town](https://docs.val.town/reference/esm-town.md): Endpoint for getting val source code
- [Using images in vals](https://docs.val.town/reference/images.md): Hosting images in Val Town and elsewhere
- [Importing](https://docs.val.town/reference/import.md): Import code from vals, NPM, JSR, and URLs
- [Permissions](https://docs.val.town/reference/permissions.md): Vals can be private, unlisted, or public
- [Keyboard shortcuts](https://docs.val.town/reference/shortcuts.md): Keyboard shortcuts for Val Town
- [Runtime](https://docs.val.town/reference/runtime.md): Val Town uses the Deno runtime to run your code
- [Version Control](https://docs.val.town/reference/version-control.md): Every time you save a val it creates a new immutable version in the version history.

## Standard Library
- [Blob Storage](https://docs.val.town/std/blob.md): Store and retrieve binary data with Val Town's blob storage system
- [OpenAI](https://docs.val.town/std/openai.md): Integrate with OpenAI's APIs to add AI capabilities to your vals
- [Proxied fetch](https://docs.val.town/std/fetch.md): Make HTTP requests to external services using Val Town's proxied fetch
- [Email](https://docs.val.town/std/email.md): Send emails programmatically from your vals using Val Town's email API
- [SQLite](https://docs.val.town/std/sqlite.md): Val Town SQLite is a lightweight, standard database. Every Val Town account comes with its own private SQLite database that is accessible from any of your vals.
- [Migrations](https://docs.val.town/std/sqlite/migrations.md): How to manage database schema changes with migrations in Val Town SQLite
- [ORMs](https://docs.val.town/std/sqlite/orms.md): Using Object-Relational Mapping libraries with Val Town SQLite
- [Usage](https://docs.val.town/std/sqlite/usage.md): How to use Val Town SQLite, with examples.

## REST API
- [Overview](https://docs.val.town/api.md): Val Town's REST API allows you to programmatically manage your account and its resources - vals, blob storage, sqlite databases, likes, comments, and more.
- [Authentication](https://docs.val.town/api/authentication.md): How to authenticate to Val Town using API Tokens
- [JavaScript SDK](https://docs.val.town/api/sdk.md): Interact with Val Town via the TypeScript SDK to programmatically create and update vals, get user information, and much more.

## Troubleshooting
- [Blocked bots](https://docs.val.town/troubleshooting/bot-rate-limiting.md): Some bots are blocked across all Vals
- [CORS](https://docs.val.town/troubleshooting/cors.md): Understanding Cross-Origin Resource Sharing (CORS) in Val Town
- [Migrating Deprecated HTTP Vals](https://docs.val.town/troubleshooting/migrating-deprecated-http-vals.md): Learn how to migrate your HTTP vals to the new runtime
- [Serialization](https://docs.val.town/troubleshooting/serialization.md): Val Town tries to serialize and deserialize as many types as it can, but doing that for all JavaScript is unfortunately very hard
- [Exports](https://docs.val.town/troubleshooting/exports.md): Vals with triggers (HTTP, Cron, Email) require at least one export.
- [Upgrade Guide: Safer Val Scopes](https://docs.val.town/troubleshooting/std-set-permission-error.md): How to upgrade your vals for the safer default scopes rolled out to everyone on Feb 11, 2025
- [Permission errors](https://docs.val.town/troubleshooting/permission-errors.md): Vals run in a sandbox that doesn’t permit access to the filesystem, or to execute arbitrary scripts.
- [Express to HTTP migration](https://docs.val.town/troubleshooting/express-to-http-migration.md): How to migrate existing vals from the deprecated express type to the HTTP type

## Guides
- [Embedding Vals in other sites](https://docs.val.town/guides/embed.md): Any val can be embedded as an iframe on other sites
- [Generate PDFs](https://docs.val.town/guides/generate-pdfs.md): Using jsPDF, you can generate PDFs from scratch and download them from Val Town.
- [Creating a webhook](https://docs.val.town/guides/creating-a-webhook.md): Use Val Town to receive HTTP webhooks from services like Discord or Stripe
- [In, Val, Out](https://docs.val.town/guides/in-val-out.md): Manage input (like user signups) and automate output (e.g., Slack messages)
- [Push notifications](https://docs.val.town/guides/push-notifications.md): Using the third-party service ntfy.sh, you can send push notifications to phones and computer with Val Town.
- [QR Code](https://docs.val.town/guides/qr-code.md): Val Town can be used as a way to generate QR Codes.
- [RSS](https://docs.val.town/guides/rss.md): Val Town can both parse and generate RSS feeds for blogs and other updated sources
- [Save HTML form data](https://docs.val.town/guides/save-html-form-data.md): Save HTML form data on Val Town
- [Saving data from a web page](https://docs.val.town/guides/saving-data-from-a-web-page.md): Save data from a web page on Val Town
- [Website Uptime Tracker](https://docs.val.town/guides/website-uptime-tracker.md)
- [Weather](https://docs.val.town/guides/weather.md): Build weather related apps with Val Town
- [Web scraping](https://docs.val.town/guides/web-scraping.md): Use Val Town to write a web scraper to extract content from websites
- [Interop with Node, Deno, and Browsers](https://docs.val.town/guides/interop.md): Learn how to run your vals in different runtimes

## Integrations
- [Airtable](https://docs.val.town/integrations/airtable.md): You can use Airtable with Val Town to store data or load edited data from other sources
- [Browserbase](https://docs.val.town/integrations/browserbase.md): How to use Browserbase & Puppeteer to with Val Town
- [Browserless](https://docs.val.town/integrations/browserless.md): How to use Browserless to scrape websites with Val Town
- [Gmail](https://docs.val.town/integrations/gmail.md): How to use Gmail with Val Town
- [Google Sheets](https://docs.val.town/integrations/google-sheets.md): Using the Google Sheets API, you can add rows to a spreadsheet with Val Town.
- [AWS S3](https://docs.val.town/integrations/s3.md): S3 is Amazon's very popular object storage system. You can upload & download objects on S3 using Val Town.
- [SQLite wasm](https://docs.val.town/integrations/sqlite-wasm.md): Using Deno's ability to load WASM modules, you can actually run SQLite right in Val Town.
- [Kernel](https://docs.val.town/integrations/kernel.md): How to use Kernel with Val Town
- [Steel](https://docs.val.town/integrations/steel.md): How to use Steel & Puppeteer to with Val Town
- [Stripe](https://docs.val.town/integrations/stripe.md): Accept payments in Val Town using Stripe
- [Supabase webhooks](https://docs.val.town/integrations/supabase.md): Handle Supabase webhooks in Val Town
- [Telegram  bot](https://docs.val.town/integrations/telegram.md): Create a Telegram bot that can receive and respond to messages on Val Town
- [Get a Github user](https://docs.val.town/integrations/github/get-a-github-user.md): Get a user without passing an authentication token on Val Town.
- [Github user's stars (pagination)](https://docs.val.town/integrations/github/github-users-stars-pagination.md): Get a user's stars across all their repositories on GitHub
- [Receiving a GitHub Webhook](https://docs.val.town/integrations/github/receiving-a-github-webhook.md): Send yourself an email / Slack / Discord notification when someone stars your GitHub repository
- [Neon Postgres](https://docs.val.town/integrations/databases/neon-postgres.md): How to integrate with Neon, a hosted Postgres platform that does horizontal scaling and includes an SQL-over-HTTP API.
- [PlanetScale](https://docs.val.town/integrations/databases/planetscale.md): How to store data in PlanetScale, a hosted MySQL platform with the ability to scale beyond a single instance and evolve schemas.
- [Supabase](https://docs.val.town/integrations/databases/supabase.md): How to connect Val Town to Supabase, a hosted Postgres-as-a-platform that lets you make queries via HTTP.
- [Upstash](https://docs.val.town/integrations/databases/upstash.md): Using Upstash, a hosting provider that provides free 1MB Redis instances.
- [Discord welcome bot](https://docs.val.town/integrations/discord/bot.md): Create a Discord bot that sends a DM to new users.
- [Discord bot](https://docs.val.town/integrations/discord/how-to-make-a-discord-bot-hosted-24-7-for-free-in-.md): How to make a Discord bot hosted 24/7 for free in 6 steps
- [Send Discord message via webhook](https://docs.val.town/integrations/discord/send-message.md): Shows you how to receive webhooks from Discord on Val Town.
- [Build a Slack bot](https://docs.val.town/integrations/slack/bot.md): Create interactive Slack bots that respond to mentions, slash commands, and user interactions