diff --git a/earthly/docs/Readme.md b/earthly/docs/Readme.md
new file mode 100644
index 000000000..7c91d71cc
--- /dev/null
+++ b/earthly/docs/Readme.md
@@ -0,0 +1,21 @@
+# Catalyst Documentation Builders and UDCs
+
+This directory contains targets for the Catalyst Documentation builders, and associated UDCs.
+
+## Check
+
+This target includes a check to ensure the MkDocs base builder works as expected.
+
+```bash
+earthly -P +check
+```
+
+## Updating Dependencies
+
+If a new dependency is added to `pyproject.toml` ensure to run:
+
+```sh
+poetry lock
+```
+
+in the `earthly/docs` directory to update the locked dependencies.
\ No newline at end of file
diff --git a/earthly/python/Readme.md b/earthly/python/Readme.md
new file mode 100644
index 000000000..72c01b778
--- /dev/null
+++ b/earthly/python/Readme.md
@@ -0,0 +1,36 @@
+
+# Python Earthly Build Containers and UDCs
+
+This repo defines common python targets and UDCs for use with python.
+
+## User Defined Commands
+
+### POETRY_SETUP
+
+This UDC sets up a python based container that uses poetry for dependency management.
+Once the UDC has run, the Earthly target that invoked it will
+
+#### Invocation
+
+In an `Earthfile` in your source repository add:
+
+```Earthfile
+example_python_target:
+    FROM python:3.11-bullseye
+    DO github.com/input-output-hk/catalyst-ci:v1.2.0/earthly/python+POETRY_SETUP
+```
+
+You may also pass optional arguments:
+
+* `extra_files`: Defining extra files into the `/poetry` directory in the container.
+* `opts`: Options to the `poetry install` command.
+
+These arguments are optional and neither is required to be set.
+
+The directory that contains the Earthfile that invokes this UDC MUST have:
+
+* `pyproject.toml` : Definitions of the project to be installed with Poetry.
+* `poetry.lock` : Dependency lock file.
+  Up-to-date by running:
+  * `poetry lock --no-update` : Update lock file, but do not update dependencies; or
+  * `poetry lock` : Update lock file and dependencies as required.
\ No newline at end of file
diff --git a/earthly/rust/Earthfile b/earthly/rust/Earthfile
index 6539cab68..b57386241 100644
--- a/earthly/rust/Earthfile
+++ b/earthly/rust/Earthfile
@@ -85,7 +85,6 @@ rust-base-all-hosts:
 #  * toolchain : The `rust-toolchain` toml file.
 SETUP:
     COMMAND
-
     ARG toolchain=./rust-toolchain.toml
 
     # Copy our toolchain dependency.