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Format: retain imported chart parts through native saves (#851)

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* M2.1: preserve chart parts through native saves

Serialize retained chart relationships and payloads in native files.
Add native and headless file-command round-trip regressions.

Contribution on behalf of @MMexicann.

* Format: bound opaque chart parts as native ZIP entries

Address maintainer feedback on the existing PR. Preserve upstream work and document tested scope and validation limits.

* Model: track transient native chart part entries

Address maintainer feedback on the existing PR. Preserve upstream work and document tested scope and validation limits.

* PPTX: initialize native chart entry metadata

Address maintainer feedback on the existing PR. Preserve upstream work and document tested scope and validation limits.

* Engine: adapt chart native roundtrip fixtures

Address maintainer feedback on the existing PR. Preserve upstream work and document tested scope and validation limits.

* Docs: describe bounded chart sidecars and validation

Address maintainer feedback on the existing PR. Preserve upstream work and document tested scope and validation limits.

* Roadmap: record bounded chart persistence evidence

Address maintainer feedback on the existing PR. Preserve upstream work and document tested scope and validation limits.

---------

Co-authored-by: skylar taylor-barrick <hi@skylar.cc>
This commit is contained in:
Mex
2026-10-19 11:44:16 -06:00
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co-authored by skylar taylor-barrick
parent 010941ec60
commit f34f4121c8
12 changed files with 2049 additions and 1466 deletions
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docs/gaps.md
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# Where DeckCraft falls short of PowerPoint
> **Last reviewed:** 2026-10-14 · **Last updated:** 2026-10-14 · **Change:** major (community PR wave 2026-10-14: soak tests, PPTX corpus, comment threads (#70), embedded fonts, SmartArt Text Pane, Animation Pane timeline, Hunspell spelling, thesaurus, AutoCorrect, 14 new dialogs, pen pressure and trackpad gestures; duplicated entries and headers folded; previous: minor, 3-D bevel, camera and face lighting rendered) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
> **Last reviewed:** 2026-10-14 · **Last updated:** 2026-10-18 · **Change:** minor (native chart payloads stored in bounded ZIP members; previous: major, community PR wave 2026-10-14: soak tests, PPTX corpus, comment threads (#70), embedded fonts, SmartArt Text Pane, Animation Pane timeline, Hunspell spelling, thesaurus, AutoCorrect, 14 new dialogs, pen pressure and trackpad gestures; duplicated entries and headers folded; previous: minor, 3-D bevel, camera and face lighting rendered) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
Every known shortfall, one entry each, ranked by how much it stops someone who presents with
PowerPoint from switching. This is the work list: pick from the top. Numbers are summarized in
@@ -180,7 +180,9 @@ Detail in [file-format-parity.md](file-format-parity.md).
neither label. A combo chart's secondary value axis is read (`y2_*`,
`Series.secondary_axis`) and is not written back when the chart is rebuilt.
An unchanged chart's embedded workbook now survives save (#335); editing the chart still
drops it rather than writing a stale spreadsheet.
drops it rather than writing a stale spreadsheet. The workbook and other retained chart parts
also survive `.deckcraft` save/reopen (`crates/engine/tests/chart_native.rs`), with binary
payloads in bounded ZIP entries sharing the media load budget (`crates/format` tests).
- **Impact:** most business decks have charts; editing their data is routine.
- **Estimate:** 12–20 h. Data and elements are **beta blockers** (6–10 h).
@@ -354,6 +356,8 @@ Detail in [localization-parity.md](localization-parity.md).
| Date | Change | Summary |
|---|---|---|
| 2026-10-18 | minor | Native chart payloads use referenced ZIP members and share media byte/item limits; old inline sidecars remain readable. Synthetic tests cover multi-megabyte layout, all shape owners, shared budgets, missing/corrupt members and invalid references. Scores and milestone scope unchanged |
| 2026-10-15 | trivial | Native saves retain chart package parts and relationships, including charts in groups; edited chart data still does not export a stale source workbook. Chart editing gaps and scores remain unchanged |
| 2026-10-15 | trivial | PPTX trigger sequences keep later On Click steps instead of converting them to After Previous; mixed starts, independent buttons and paragraph builds have synthetic round-trip regressions |
| 2026-10-16 | trivial | AutoFormat superscripts ordinals (1st, 22nd) as you type, with an AutoCorrect option to turn it off; automatic bulleted lists remain |
| 2026-10-14 | trivial | Fixed #718: remote MCP no longer accepts unrelated or buffered stale success; loopback regressions cover invalid envelopes, incomplete and oversized frames |