Three review P1s.
1. CHANGELOG no longer asserts a breaking Schema change this PR does not ship.
sheet export / sheet create deliver main's mcp + interface_ref and
schema-compatibility reports ok (0 changed fields), so the "declared as
composite (breaking)" entry was false and is removed; the set-style entry
drops the "breaking" framing (accepted as compatible by the reviewed
mapping-exclusion carve-out); the duplicate ### Changed heading is merged.
2. firstNonEmptySheetSpecCell reads the start cell via
pickStr(spec, "startCell", "start_cell"). Sheet specs are forwarded verbatim
to table_put, whose wire fields are camelCase in this repo. The prior
snake_case-only read meant a user passing the real startCell would have data
written at the offset while the probe read A1 — a false "写入未生效" on a
successful write. camelCase preferred, snake_case kept for tolerance.
3. planStyleOps now parses cell_merges range with parseA1Range, matching the
cell_styles branch. planStyleOps is dry-run once before create_workspace_sheet
as the up-front structural gate, so an invalid range like "not-a-range" is now
rejected before any RPC instead of failing only at the final merge_cells call
and leaving an unrollbackable partially-completed document. merge_cells' range
contract is A1:B3-style, which parseA1Range covers (and it strips a Sheet1!
prefix).
Tests: cell-merges-invalid-range added to TestSheetCreateValidatesBeforeCreating
Document (asserts calls == 0); TestFirstNonEmptySheetSpecCell covers both
startCell and start_cell. Changed-code coverage stays at 100%; targeted sheet
suites pass; CHANGELOG has a single Changed section with no false breaking claim.
huwenjiao.hwj
ecaa375be8