Remove the docs app. Will figure out how to do this all via the wiki app.
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4779 ed5197a5-7fde-0310-b194-c3ffbd925b24
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{
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"type": "tildefriends-app",
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"emoji": "📚"
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}
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# Tilde Friends Developer's Guide
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[Back to index](#index)
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A Tilde Friends application runs on the server. To make an interesting
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application that interacts with the client, it's necessary to understand
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how the parts work together.
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## Hello, world!
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A simple starting point. Presents `Hello, world!` in the browser when
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visited.
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**app.js**:
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```
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app.setDocument('<h1>Hello, world!</h1>');
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```
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# Tilde Friends Documentation
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Tilde Friends is a participating member of a greater social
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network, [Secure Scuttlebutt](https://scuttlebutt.nz/),
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adding a way to safely and securely write, share,
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and run code in the form of server-side web applications.
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- [Tilde Friends Vision](#vision)
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- [Secure Scuttlebutt from Scratch](#ssb)
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- [Structure](#structure)
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- [Guide](#guide)
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- [TODO](#todo)
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# Secure Scuttlebutt from Scratch
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[Back to index](#index)
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This aims to be the missing reference for those who wish to create a Secure
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Scuttlebutt client from scratch.
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## Discovery
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A good way to get started is to participate in local network discovery with a known working
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client on the same network. The
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[Scuttlebutt Programming Guide](https://ssbc.github.io/scuttlebutt-protocol-guide/#local-network)
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is a good start, here, with a few things to note:
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1. Some clients advertise multiple addresses separated by semicolons (`;`).
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2. Some clients advertise alternative protocols than `shs` and use hostnames instead of
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IPv4 addresses.
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So be prepared to accept variations.
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There also an undocumented "new" style of discovery message.
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## Secret Handshake, Box Stream, and RPC Protocol
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Now that two clients are aware of eachother, they need to complete a secret handshake.
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The [programming guide](https://ssbc.github.io/scuttlebutt-protocol-guide/#handshake)
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is once again a good reference.
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The box stream and RPC protocol can both be implemented from the
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[same documentation](https://ssbc.github.io/scuttlebutt-protocol-guide/#box-stream)
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without surprises.
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## Synchronizing Data
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... `ebt.replicate` or `createHistoryStream` ...
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## Rooms
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TODO
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## References
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* [https://ssbc.github.io/scuttlebutt-protocol-guide/](https://ssbc.github.io/scuttlebutt-protocol-guide/)
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* [https://dev.planetary.social/](https://dev.planetary.social/)
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* [https://dev.scuttlebutt.nz/#/golang/?id=muxrpc-endpoints](https://dev.scuttlebutt.nz/#/golang/?id=muxrpc-endpoints)
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# Tilde Friends Structure
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[Back to index](#index)
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Tilde Friends is a mostly-self-contained executable written in C.
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In combines the following key components:
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- A Secure Scuttlebutt (SSB) client/server. This talks with other SSB
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instances, storing messages and blobs for anyone visible to local
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users as they are encountered and sharing anything published locally
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as appropriate.
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- An sqlite database. This is where the SSB instance stores its data.
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The general schema involves a `messages` table, storing mostly JSON,
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a `blobs` table storing arbitrary blob data, and a `properties` table,
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storing arbitrary state gleaned from `messages` and `blobs`, generally
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updated on demand and incrementally.
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- A QuickJS runtime. The core process runs stock scripts and has access
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and permission to use all resources. All other processes, which
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includes everything which runs untrusted code created by Tilde Friends
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users, are strictly sandboxed in ways similar to how web browsers run
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untrusted code. All attempts to access potentially sensitive resources
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are mediated through the core process.
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When run with no arguments, it starts a web server on
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[http://localhost:12345/](http://localhost:12345/) and an SSB node.
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## Web Interface
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The Tilde Friends web server provides access to Tilde Friends applications,
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which are arbitrary user-defined web applications.
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At the top left, in addition to some basic navigation links, is an `edit`
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link. Anyone can view, modify, and run in-place the code to any Tilde
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Friends application by using the in-browser editor.
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At the top right, one can `login` (to save work in their own space)
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or `logout` (proceeding as a guest).
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The rest of the page is an iframe belonging to the application.
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## Special Paths
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- `/~user/app/` - Tilde Friends application paths take the form `/~user/app/`, where `user`
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is a username of a Tilde Friends account, and `app` is an arbitrary name
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of an application saved by the given user.
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- `/~user/app/file` - A raw file in an app.
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- `/&blobid.ed25519` - A raw blob. Content-Type is inferred for at least
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a few common image types.
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## Communication Channels
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Web Browser <-> Core <-> Sandbox
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Visiting an application path delivers stock HTML and JavaScript which
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establishes a WebSocket connection back to the server.
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At this point, a new sandbox process is started in Tilde Friends, much
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as a new sandboxed process might be started for a new tab in a web
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browser. This process has a custom RPC connection to the core process
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which holds the WebSocket connection to the browser.
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The custom RPC communication between the sandbox process and the core
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process facilitates passing and calling functions remotely. Calling a
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function in another process returns a `Promise`.
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An application will typically call `app.setDocument()` at startup to
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populate the app's iframe in the web browser with its own client web
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application resources.
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# Tilde Friends TODO
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[Back to index](#index)
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## MVP3
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- Sync status (problem feeds, messages/seconds stats, ...)
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- app: wiki
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- app: public blog
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- Content-Disposition: download
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- remove SSB credentials
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- export SSB credentials
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- initial: better empty news screen
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- initial: remembered wrong user across login/logout
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- initial: bad experience when following nobody
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- make a cool independent app
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- indicate when workspace differs from installed
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- / => Something good.
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- update docs
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- audit + document API exposed to apps
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- fix weird HTTP warnings
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- channels
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- placeholder/missing images
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- no denial of service
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- package standalone executable
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- editor without app iframe
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- sequence_before_author -> flags
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- linkify ssb: links
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- perfect rooms support
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- connections 2.0
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- make a better connections API
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## Maybe Done
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- blob_wants 2.0
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- image downsample
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- app: todo
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- app: build archive
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- update README
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- administrators config
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- apps name characters
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- initial: can't switch to account when there is only one
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- get tarball under 5MB
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- rooms
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- initial: doesn't refresh when create identity
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- tf account timeout why
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- ssb don't overflow boxes
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- jwt for session tokens
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- linkify https://...
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- emoji reaction picker
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- expose loads of stats
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- confirm posting all new messages
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- multiple identities per user, in database
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- auto-populate data on initial launch
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- make the docker image good / test it / use it
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- leaking imports / exports
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- file upload widget
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- keep working on good error feedback
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- build for windows
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- installable apps (bring back an app message?)
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- sqlStream => sqlExec or something
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- !ssb from child process?
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## Done
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- update LICENSE
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- logging to browser
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# Tilde Friends Vision
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[Back to index](#index)
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Tilde Friends is a tool for making and sharing.
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It is both a peer-to-peer social network client, participating in Secure
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Scuttlebutt, and an environment for creating and running web applications.
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## Why
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This is a thing that I wanted to exist and wanted to work on. No other reason.
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There is not a business model. I believe it is interesting and unique.
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## Goals
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1. Make it **easy and fun** to run all sorts of web applications.
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2. Provide **security** that is easy to understand and protects your data.
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3. Make **creating and sharing** web applications accessible to anyone with a
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browser.
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## Ways to Use Tilde Friends
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1. **Social Network User**: This is a social network first. You are just here,
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because your friends are. Or you like how we limit your message length or
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short videos or whatever the trend is. If you are ambitious, you click links
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and see interactive experiences (apps) that you wouldn't see elsewhere.
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2. **Web Visitor**: You get links from a friend to meeting invites, polls, games,
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lists, wiki pages, ..., and you interact with them as though they were
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cloud-hosted by a megacorporation. They just work, and you don't think twice.
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3. **Group leader**: You host or use a small public instance, installing apps for
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a group of friends to use as web visitors.
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4. **Developer**: You like to write code and make or improve apps for fun or to
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solve problems. When you encounter a Tilde Friends app on a strange server,
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you know you can trivially modify it or download it to your own instance.
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## Future Goals / Endgame
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1. Mobile apps. This can run on your old phone. Maybe you won't be hosting
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the web interface publicly, but you can sync, install and edit apps, and
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otherwise get the full experience from a tiny touch screen.
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2. The universal application runtime. The web browser is the universal
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platform, but even for the simplest application that you might want to host
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for your friends, cloud hosting, containers, and complicated dependencies might
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all enter the mix. Tilde Friends, though it is yet another thing to host,
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includes everything you need out of the box to run a vast variety of interesting
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apps.
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Tilde Friends will be built out, gradually providing safe access to host
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resources and client resources the same way web browsers extended access to
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resources like GPU, persistent storage, cameras, ... over the years.
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Not much effort has been put forward yet to having a robust, long-lasting API,
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but since the client side longevity is already handled by web browsers, it
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seems possible that the server-side API can be managed in a similar way.
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3. An awesome development environment. Right now it runs JavaScript from the
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first embeddable text editor I could poorly configure enough to edit code,
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but it could incorporate a debugger, source control integration a la ssb-git,
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merge tools, and transpiling from all sorts of different languages.
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