diff --git a/ReadMe.md b/ReadMe.md
index 6c4beb6..b889130 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -4,20 +4,44 @@ Finding useful things to do with local LLMs.
 All scripts work with data within `PRIVATE_DATA/` so that private data can't be
 accidentally committed.
 
-###### `cosine_similarity.lua`
+### `cosine_similarity.lua`
 Opens `embeddings.json` and creates `similarities.json` with a sorted list of
 comparisons.
 
-###### `generate_embeddings.lua`
+### `generate_embeddings.lua`
 Opens every file on its whitelist within the `notebook` directory, and generates
 embeddings (placed in `embeddings.json`). When files are too long, it truncates
 them.
 
-###### `least_similar.lua`
+### `least_similar.lua`
 Opens `similarities.json`, reverses the sort order, and saves it as
 `differences.json`.
 
-###### `synopsis_generator.lua`
+### `refresh_sources.lua`
+Creates/Maintains a store of chunked data with embeddings based on configurable
+sources. Example:
+
+```json
+{
+  "source name (unused by the script)":{
+    "filters":{
+      "blacklist":".git",
+      "extension_whitelist":"md"
+    },
+    "initialize_command":"git clone REMOTE",
+    "path":"will be created before initialize_command is run",
+    "strip_frontmatter":true,
+    "refresh_command":"git reset --hard origin/main"
+  }
+}
+```
+
+The filters are based on `utility.tree`'s filter options. `initialize_command`
+is only run the first time (optional), while `refresh_command` is run each time
+(optional). Commands will be run in the specified `path`. `strip_frontmatter` is
+for removing YAML frontmatter (common in Markdown files) if truthy.
+
+### `synopsis_generator.lua`
 Chooses a random file within `notebook`, and generates a novel synopsis from it.
 
 Arguments: