diff --git a/README.md b/README.md
index 37dc053c..43789e8e 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,10 @@
 # Datomish
 
-Datomish is a persistent, embedded knowledge base. It's written in ClojureScript, and draws heavily on [DataScript](https://github.com/tonsky/datascript) and [Datomic](http://datomic.com).
+Datomish is a persistent, embedded knowledge base. It draws heavily on [DataScript](https://github.com/tonsky/datascript) and [Datomic](http://datomic.com).
 
-Datomish compiles into a single JavaScript file, and is usable both in Node (on top of `promise_sqlite`) and in Firefox (on top of `Sqlite.jsm`). It also works in pure Clojure on the JVM on top of `jdbc-sqlite`.
+The first version of Datomish was written in ClojureScript, targeting both Node (on top of `promise_sqlite`) and Firefox (on top of `Sqlite.jsm`). It also works in pure Clojure on the JVM on top of `jdbc-sqlite`.
 
-There's an example Firefox restartless add-on in the [`addon`](https://github.com/mozilla/datomish/tree/master/addon) directory; build instructions are below.
+This branch is for rewriting Datomish in Rust, giving us a smaller compiled output, better performance, more type safety, better tooling, and easier deployment into Firefox and mobile platforms.
 
 
 ## Motivation
@@ -67,8 +67,6 @@ contribute.
 
 Datomish is currently licensed under the Apache License v2.0. See the `LICENSE` file for details.
 
-Datomish includes some code from DataScript, kindly relicensed by Nikita Prokopov.
-
 
 ## SQLite dependencies
 
@@ -76,124 +74,3 @@ Datomish uses partial indices, which are available in SQLite 3.8.0 and higher.
 
 It also uses FTS4, which is [a compile time option](http://www.sqlite.org/fts3.html#section_2).
 
-
-## Prep
-
-You'll need [Leiningen](http://leiningen.org).
-
-```
-# If you use nvm.
-nvm use 6
-
-lein deps
-npm install
-
-# If you want a decent REPL.
-brew install rlwrap
-```
-
-## Running a REPL
-
-### Starting a ClojureScript REPL from the terminal
-
-```
-rlwrap lein run -m clojure.main repl.clj
-```
-
-### Connecting to a ClojureScript environment from Vim
-
-You'll need `vim-fireplace`. Install using Pathogen.
-
-First, start a Clojure REPL with an nREPL server. Then load our ClojureScript REPL and dependencies. Finally, connect to it from Vim.
-
-```
-$ lein repl
-nREPL server started on port 62385 on host 127.0.0.1 - nrepl://127.0.0.1:62385
-REPL-y 0.3.7, nREPL 0.2.10
-Clojure 1.8.0
-Java HotSpot(TM) 64-Bit Server VM 1.8.0_60-b27
-    Docs: (doc function-name-here)
-          (find-doc "part-of-name-here")
-  Source: (source function-name-here)
- Javadoc: (javadoc java-object-or-class-here)
-    Exit: Control+D or (exit) or (quit)
- Results: Stored in vars *1, *2, *3, an exception in *e
-
-user=> (load-file "repl.clj")
-Reading analysis cache for jar:file:/Users/rnewman/.m2/repository/org/clojure/clojurescript/1.9.89/clojurescript-1.9.89.jar!/cljs/core.cljs
-Compiling out/cljs/nodejs.cljs
-Compiling src/datomish/sqlite.cljs
-Compiling src/datomish/core.cljs
-ClojureScript Node.js REPL server listening on 57134
-Watch compilation log available at: out/watch.log
-To quit, type: :cljs/quit
-cljs.user=>
-```
-
-in Vim, in the working directory:
-
-```
-:Piggieback (cljs.repl.node/repl-env)
-```
-
-Now you can use `:Eval`, `cqc`, and friends to evaluate code. Fireplace should connect automatically, but if it doesn't:
-
-```
-:Connect nrepl://localhost:62385
-```
-
-## To run tests in ClojureScript
-
-Run `lein doo node test once`, or `lein doo node test auto` to re-run on file changes.
-
-## To run tests in Clojure
-
-Run `lein test`.
-
-## To run smoketests with the built release library in a Node environment
-
-```
-# Build.
-lein cljsbuild once release-node
-npm run test
-```
-
-## To build for a Firefox add-on
-
-```
-lein cljsbuild once release-browser
-```
-
-### To build and run the example Firefox add-on:
-
-First build as above, so that `datomish.js` exists.
-
-Then:
-
-```
-cd addon
-./build.sh
-cd release
-./run.sh
-```
-
-## Preparing an NPM release
-
-The intention is that the `target/release-node/` directory is roughly the shape of an npm-ready JavaScript package.
-
-To generate a require/import-ready `target/release-node/datomish.js`, run
-```
-lein cljsbuild once release-node
-```
-To verify that importing into Node.js succeeds, run
-```
-npm run test
-```
-
-## To locally install for ClojureScript use
-
-```
-lein with-profile node install
-```
-
-Many thanks to ([David Nolen](https://github.com/swannodette)) and ([Nikita Prokopov](https://github.com/tonsky)) for demonstrating how to package ClojureScript for distribution via npm.