Both capabilities were added as flags on an existing leaf, and in both cases
the leaf's published interface stopped describing what the command did:
- `sheet create --values/--sheets/--styles` orchestrates create → probe →
resolve default worksheet → write → read back → optional styles, yet the
leaf still published `interface_mode: mcp` + `create_workspace_sheet`.
- `sheet export --export-format csv` reads `get_range_as_csv` and never
invokes `submit_export_job`, yet the leaf published `submit_export_job`.
Each moves to its own command, declaring the interface it actually uses:
`sheet create-with-data` is `composite` with a reviewed reason and no
`interface_ref`; `sheet export-csv` is `mcp` + `get_range_as_csv`. Both are
pinned in the interface-disposition contract test.
`sheet create` and `sheet export` are restored byte-for-byte to main, so the
compatibility gates see two `command_added` additions instead of four
locked-field changes. The split also removes a user-visible trap: `--range`
without `--export-format csv` used to be silently discarded and the whole
workbook exported; the cross-format flags no longer exist, pinned by
TestSheetExportAndExportCsvFlagsDoNotLeak.
Drops the 8 now-stale mapping-ledger exclusions that covered the flags on
`sheet.create_workspace_sheet` / `sheet.submit_export_job`, shrinking this
branch's exclusion surface. Skill references and CHANGELOG follow the split.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
