Add state diagram and correct the CLI invocation

README.md

@@ -5,6 +5,28 @@
 A Python package for ingesting job descriptions & resumes, and crafting cover letters that use the
 latter to satisfy the former.
 
+The process leverages GPT-4 to first extract relevant job description features, grabbing
+corresponding features from the resume, and then looping between (1) generating a cover letter that
+uses the resume to satisfy the job description and (2) critiquing the cover letter in question.
+A state diagram follows:
+
+```mermaid
+stateDiagram-v2
+    direction TB
+    state "Extract key requirements" as JD_Extract
+    state "Pull relevant item from resume" as Resume
+    state "Write a cover letter draft" as Write
+    state "Review and get feedback on draft" as Review
+    [*] --> JD_Extract
+    JD_Extract --> Resume
+    Resume --> Draft
+    state Draft {
+        Review --> Write
+        Write --> Review
+    }
+    Draft --> [*]
+```
+
 ## 🚀 Using
 
 ### With PyPi install
@@ -17,7 +39,7 @@ This should make `make-cover-letter` command available on your command line. You
 following:
 
 ```bash
-make-cover-letter --resume path/to/json/resume.json --jd path/to/jd.md
+make-cover-letter path/to/json/resume.json path/to/jd.md
 ```
 
 This will generate a cover letter for the job description in `path/to/jd.md` using the resume in