Reproducing the bounded PPT shape cases
Build the package, then run node scripts/prepare-native-ppt-shape-edits.mjs. Optional arguments select an output directory and built module directory. The driver does not launch Office. It emits three edited decks, the generated classic baseline, explicit JSON Pointer changes, and a SHA-256/provenance manifest. It fails if any byte hash differs from the independently observed native case.
| Case | Source | Observed before and after, in PowerPoint points |
|---|---|---|
| Title position/width | Owned test/fixtures/ppt/native-text.ppt | Left 30 to 40; top 25 to 30; width 650 to 660; height 41.25 unchanged |
| Title height | Same owned native fixture | Height 41.25 to 51.25; other geometry unchanged |
| Classic rectangle | First-party synthetic neutral writer, OwnedRectangle | Bounds (10,20,100,50) to (20,25,120,60) |
The synthetic baseline is not native-produced. Its generator explicitly declares the already-present primitive type and anchor in FSP flags. It removes no mirrors or unknown properties. Both its baseline and edited output were independently opened in Microsoft PowerPoint 16.0. All three comparisons matched the declared geometry changes and preserved every other captured shape geometry, text, character font, notes, slide ID and count. These are captured semantic checks; they do not establish rendering or full format fidelity.
For a new independent check, use scripts/native-office-snapshot.ps1 with each manifest source and output path, then run node scripts/compare-native-snapshots.mjs BEFORE.json AFTER.json CHANGES.json. Use the native snapshot helper's rich-text option to include character formatting when available. Explicit fixture inputs only; the helper disables macros and opens documents read-only. The generation manifest deliberately does not report a new native check as having run.
All successful cases use 8-byte small client anchors. Runtime bounds are exact master units, eight per point. Large client anchors retain raw values with undecoded geometry. Grouped, inherited, rotated/flipped, mirrored and ambiguous geometry remains preserved and refused for editing. The mirrored rectangle in the native fixture is explicitly refused; it is not the classic writable case.