diff --git a/crates/README.md b/crates/README.md
index 08bc414fe4..209992db82 100644
--- a/crates/README.md
+++ b/crates/README.md
@@ -149,4 +149,10 @@ Provides a Rust wrapper for the WebAssembly test platform built on libc and is p
Below is a simplified diagram to illustrate how a Roc application and host are combined to build an executable file.
-
+
+
+# Roc Compiler Stages
+
+Below is a simplified diagram to illustrate the different stages of the Roc Compiler.
+
+
diff --git a/crates/building_a_roc_application.svg b/crates/building_a_roc_application.svg
index 8eebd757cf..50bff9e784 100644
--- a/crates/building_a_roc_application.svg
+++ b/crates/building_a_roc_application.svg
@@ -1 +1 @@
-
\ No newline at end of file
+
\ No newline at end of file
diff --git a/crates/compiler/exhaustive/src/lib.rs b/crates/compiler/exhaustive/src/lib.rs
index 9cb4f35f14..e5b292e578 100644
--- a/crates/compiler/exhaustive/src/lib.rs
+++ b/crates/compiler/exhaustive/src/lib.rs
@@ -1,5 +1,5 @@
-//! [Exhaustiveness](https://dev.to/babak/exhaustive-type-checking-with-typescript-4l3f) checking, based on "Warning for pattern matching" (Luc Maranget, 2007).
-//! http://moscova.inria.fr/~maranget/papers/warn/warn.pdf
+//! Exhaustiveness checking, based on [Warnings for pattern matching](http://moscova.inria.fr/~maranget/papers/warn/warn.pdf)
+//! (Luc Maranget, 2007).
use roc_collections::all::{HumanIndex, MutMap};
use roc_error_macros::internal_error;
diff --git a/crates/compiler/str/Cargo.toml b/crates/compiler/str/Cargo.toml
index 6bcff95749..688048376a 100644
--- a/crates/compiler/str/Cargo.toml
+++ b/crates/compiler/str/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.1"
authors = ["The Roc Contributors"]
license = "UPL-1.0"
edition = "2021"
-description = "Provides Roc styled collection reference counting."
+description = "Provides a Roc Str with reference-counting so that it may be mutated in-place."
[dependencies]
roc_collections = { path = "../collections" }
diff --git a/crates/compiler/str/src/lib.rs b/crates/compiler/str/src/lib.rs
index 97f89a6976..17f19c0fe0 100644
--- a/crates/compiler/str/src/lib.rs
+++ b/crates/compiler/str/src/lib.rs
@@ -1,4 +1,8 @@
-//! provides `Roc` styled collection [reference counting](https://en.wikipedia.org/wiki/Reference_counting).
+//! Provides `Roc` styled collection [reference counting](https://en.wikipedia.org/wiki/Reference_counting).
+//! This means the collection may or may not be safe to mutate in-place, may or
+//! may not be reference counted, and may or may not need to be freed when no
+//! longer in use. Whether each of these is true for a given collection can be
+//! determined by inspecting that collection at runtime.
#![crate_type = "lib"]
#![no_std]
diff --git a/crates/roc_compiler_stages.svg b/crates/roc_compiler_stages.svg
new file mode 100644
index 0000000000..c250b616ea
--- /dev/null
+++ b/crates/roc_compiler_stages.svg
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/crates/wasi-libc-sys/src/lib.rs b/crates/wasi-libc-sys/src/lib.rs
index 4e27008a83..fb076d282a 100644
--- a/crates/wasi-libc-sys/src/lib.rs
+++ b/crates/wasi-libc-sys/src/lib.rs
@@ -1,5 +1,6 @@
-//! Provides a Rust wrapper for the WebAssembly test platform built on libc and
-//! is primarily used for testing purposes.
+//! Provides a Rust wrapper for the WebAssembly libc, which is used when
+//! preprocessing hosts for use with the Wasm development back-end, and for the
+//! mock hosts we use in our Wasm tests.
// Rust's libc crate doesn't support Wasm, so we provide an implementation from Zig
// We define Rust signatures here as we need them, rather than trying to cover all of libc
#[cfg(target_family = "wasm")]