#16: import ODS worksheet data without overwriting source files

docs/cli.md

@@ -3,6 +3,10 @@
 Headless GridCraft: inspect, convert, evaluate, script and serve MCP without a window. Errors go to stderr with a
 non-zero exit code.
 
+`.ods` files support [worksheet data import](ods-import.md). Formula cells use their last saved
+values; source formatting and other workbook features are omitted. Import warnings go to stderr.
+Convert to `.xlsx` to save the imported workbook; ODS output is not supported.
+
 ```sh
 cargo install --path apps/gridcraft-cli     # or: cargo run -p gridcraft-cli -- <subcommand>
 ```

docs/ods-import.md

@@ -0,0 +1,22 @@
+# Importing OpenDocument spreadsheets
+
+Open an `.ods` file with File → Open, drag it onto GridCraft, or pass it to the CLI. GridCraft
+imports worksheet data into a new workbook and shows a warning describing the conversion limits.
+
+The import reads sheets, numbers, text, booleans, supported dates/times, repeated cells/rows and
+merged cells. Formula cells become their **last saved results**, not live formulas. These results
+may be out of date if the source application did not recalculate before saving. Unsupported or
+missing values retain available display text and produce a warning.
+
+This is data import, not full ODS compatibility. Source formatting, formulas, charts, images,
+names and other workbook features are not preserved. GridCraft does not write ODS files.
+
+Save opens Save As and suggests a new `.xlsx` file. The source ODS file is not used as the
+workbook's save destination; requests to save to `.ods` return an error.
+
+```sh
+gridcraft-cli info source.ods
+gridcraft-cli convert source.ods imported.xlsx
+```
+
+CLI import warnings go to stderr, leaving structured output on stdout available for scripts.