diff --git a/ImportService/TrackingDataImport.vbs b/ImportService/TrackingDataImport.vbs
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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -97,6 +97,15 @@ And a helper installer:
 
 These are intended to run on Windows to import tracking export data from the configured `ExportDirectory`.
 
+### Purple Envelope kit status pipeline
+`TrackingDataImport.vbs` drives a Purple Envelope kit through its `Kit.Status` values on each run, via `ProcessStatus` in `Main`:
+
+1. **Ready To Assign STIDS** — user picks the outbound STID on the Kit edit page (`SwitchBoardPurpleEnvelopeEdit`)
+2. **Ready to Assign Labels** — set by `SwitchBoardPurpleEnvelopeEditPost`; picked up by `AssignTracking`, which assigns serial numbers/tracking info (`createTrackingInfoForKit`)
+3. **Ready For Export** — picked up by `ExportSnailWorks`, which builds the SnailWorks CSV export (`CreateExportForSnailWorks`)
+4. **Ready to Proof** — picked up by `ProofJurisdiction`, which builds the PDF proof and proofing report (`CreateProofForJurisdiction`)
+5. **Ready For Inkjet Export** — picked up by `ExportInkjet`, which writes the inkjet CSV (`ExportInkjetFile`) and sets status to **Done**
+
 ---
 
 ## Dev tooling