continuing refactor

docs/ftp_plugin_tutorial.md

@@ -19,7 +19,7 @@ The FTP plugin demonstrates the main provider hooks that matter for a storage-st
 - `search()` walks an FTP directory tree and returns `SearchResult` rows.
 - `selector()` turns folder rows into a follow-up table when the user runs `@N`.
 - `download()` and `download_url()` fetch FTP files into `download-file` output paths.
-- `resolve_pipe_result_download()` lets `@N | add-file -store ...` materialize a remote FTP file first.
+- `resolve_pipe_result_download()` lets `@N | add-file -instance ...` materialize a remote FTP file first.
 - `upload()` lets `add-file -plugin ftp -instance <name> -path ...` push a local file to the configured FTP server.
 
 ## Example Config
@@ -114,11 +114,11 @@ search-file -plugin ftp -instance work "report"
 @1 | download-file -path C:\Downloads
 ```
 
-If you want to ingest the selected FTP file into a configured store backend:
+If you want to ingest the selected FTP file into a configured instance backend:
 
 ```powershell
 search-file -plugin ftp -instance work "report"
-@1 | add-file -store tutorial
+@1 | add-file -instance tutorial
 ```
 
 Why this works:
@@ -150,7 +150,7 @@ That split is what keeps these two user experiences compatible:
 
 - `@N` on a folder opens a new table
 - `@N` on a file downloads the file
-- `@N | add-file -store ...` first downloads, then ingests
+- `@N | add-file -instance ...` first downloads, then ingests
 
 ## Implementation Notes
 
@@ -169,6 +169,6 @@ search-file -plugin ftp -instance work "*"
 search-file -plugin ftp -instance work "path:/incoming depth:2 *.pdf"
 @1
 @1 | download-file -path C:\Downloads
-@1 | add-file -store tutorial
+@1 | add-file -instance tutorial
 add-file -plugin ftp -instance archive -path C:\Media\report.pdf
 ```