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authorKartik Agaram <vc@akkartik.com>2020-10-29 13:19:53 -0700
committerKartik Agaram <vc@akkartik.com>2020-10-29 13:19:53 -0700
commitbc67d01879212dfbda623a95723e364bf9e9e9e2 (patch)
treefbe014ea860cbf09350052b27343286e19c5f6e2
parent7521fcdc1e5308537c8793cfcd0b17c6789e06c8 (diff)
downloadmu-bc67d01879212dfbda623a95723e364bf9e9e9e2.tar.gz
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diff --git a/apps/tile/README.md b/apps/tile/README.md
index 48fd20ee..a13f7662 100644
--- a/apps/tile/README.md
+++ b/apps/tile/README.md
@@ -20,3 +20,14 @@ To run a conventional REPL (for debugging):
 ```
 ./a.elf type
 ```
+
+## hacking
+
+Unlike the top-level directory, this is just a prototype so far. There are no
+tests.
+
+To add a new primitive you'll need to hard-code it into the `evaluate`
+function (apps/tile/rpn.mu).
+
+There's also a second place you'll want to teach about predefined primitives:
+`bound-function?` (apps/tile/environment.mu)