diff --git a/ReadMe.md b/ReadMe.md
index ce5c611..1bf832f 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -19,6 +19,20 @@ cropping easy to remove the Gemini watermark. (There are other small changes to
 increase likelihood of Gemini following the prompt correctly and making a good
 output.)
 
+### Config file format
+```json
+{
+  "llm_covers": {
+    "calibre_location": "/Applications/calibre.app",
+    "default_model": "gemma4:12b-mlx",
+    "maximum_bytes": 40000
+  }
+}
+```
+
+The above are the default settings. If you need something different, you only
+need to specify the changes.
+
 ### Gemini Issues
 None of this works unless you **disable Gemini's personalization/memory**,
 because it pollutes context extremely badly and will randomly add elements and
@@ -44,7 +58,7 @@ generator to check accuracy.
 ## Tasks
 - [ ] Add timestamps to when a prompt is sent.
 - [ ] Specify ETA when sending a prompt (2.5-8 minutes depending on length). (Show as end time as well as relative time.)
-- [ ] option to delete input files or intermediate files at end of each operation step
+- [ ] option to delete input files or intermediate files at end of each major operation segment (or after its finisher..)
 - [x] instead of placeholder directories, `mkdir -p` should be used to only make them when necessary
 - [x] make script resumable instead of having to restart per book
 - [x] dry run to estimate total time before running full script, print starting ETA
@@ -52,4 +66,4 @@ generator to check accuracy.
 - [x] Combine everything into one script to manage things
 - [ ] Allow specifying a filter on what to process
 - [ ] Allow changing the maximum bytes per prompt dynamically (run smaller while I'm doing other things, run full while I'm asleep)
-- [ ] specify config format
+- [x] specify config format