Slate v2 Example Parity Matrix

Purpose

Exact inventory for legacy/current example parity.

This is not a deletion ledger. It answers:

• which legacy examples already have current same-path owners
• which legacy examples still lack direct parity owners
• which current-only examples are rewrite unlocks that need extended or explicit cut classification

Why The Old Ledger Missed Real Drift

• rows were getting promoted to paired parity row once any current + legacy proof existed
• replacement-compatibility mostly proves narrow behavior seams, not contributor-facing source shape or control-surface parity
• the matrix had no explicit source/UI parity read, so scratch rewrites could hide behind green tokenization, selection, or typing rows
• same-path current files were being treated as ambient closure instead of being held to the closer standard: the nearest honest legacy source shape

Source-First Rule

Same-path example rows are now classified from the source diff first.

• if the current file still reads like a close legacy port, it can be recovered
• if the shell is close but important behavior or interaction proof is still narrow, it is mixed
• if the file still reads like a rewrite in diff, it is open even when a browser row is green

Runtime proof can confirm a source-close row. It cannot rescue a source-drifted row.

Current Counts

• legacy TS example surfaces: 24
• current TS example surfaces: 61
• legacy Playwright example tests: 23
• current Playwright example tests: 61

Legacy TS Example Inventory

Legacy example	Current same-path example	Current replacement-compat owner	Current read
android-tests	site/examples/ts/android-tests.tsx	current + legacy rows present; current row is explicitly extended with the legacy manual case picker plus the new IME hub links	extended parity row
check-lists	site/examples/ts/check-lists.tsx	source now reads close to legacy after the actual port (0.861 similarity); the earlier as CustomEditor and test-only id drift are gone; remaining source drift is limited to current type/module syntax around imports and props; standalone current checkbox proof is still red and explicitly deferred to the later test-fix pass	recovered
code-highlighting	site/examples/ts/code-highlighting.tsx	current shell/proof exists, but the file is still full drift in source (0.062 similarity, 674 diff lines)	open
custom-placeholder	site/examples/ts/custom-placeholder.tsx	source is now equivalent to the legacy example aside from current type-only import syntax, and Chromium proof covers custom placeholder rendering plus editor height	recovered
editable-voids	site/examples/ts/editable-voids.tsx	source is much closer than before (0.568 similarity, 194 diff lines), and Chromium proof now covers shell elements, insertion/duplication, plain input editing, and nested editor editing inside the void	recovered
embeds	site/examples/ts/embeds.tsx	source now reads close to legacy (0.763 similarity, 122 diff lines); current proof closes the restored embed shell	recovered
forced-layout	site/examples/ts/forced-layout.tsx	source now reads close to legacy again after restoring the in-file layout normalizer, legacy initial copy, and contributor-facing title/paragraph shell; current browser proof for initial layout and full-delete restoration is green	recovered
hovering-toolbar	site/examples/ts/hovering-toolbar.tsx	source now reads close to legacy (0.856 similarity, 135 diff lines); current browser proof for menu reveal/hide and mark toggle is green	recovered
huge-document	site/examples/ts/huge-document.tsx	explicit cut for replacement parity: the same-path example intentionally remains the legacy chunking playground and should not be treated as the v2 runtime owner; v2 huge-doc truth is owned by large-document-runtime, bench:react:huge-document-overlays:local, and the 5000-block legacy compare gate	explicit cut
iframe	site/examples/ts/iframe.tsx	source now reads very close to legacy (0.917 similarity, 117 diff lines); current iframe editing proof is green	recovered
images	site/examples/ts/images.tsx	source now reads fairly close to legacy (0.699 similarity, 192 diff lines), and Chromium proof covers the restored shell plus invalid prompt handling and selected-image deletion	recovered
inlines	site/examples/ts/inlines.tsx	source now reads close to legacy (0.850 similarity, 334 diff lines); current browser proof for the seeded inline link is green	recovered
markdown-preview	site/examples/ts/markdown-preview.tsx	current + legacy rows exist, but the source diff still reads like a rewrite (0.082 similarity, 286 diff lines)	open
markdown-shortcuts	site/examples/ts/markdown-shortcuts.tsx	current + legacy rows exist, but the source diff still reads like a rewrite (0.086 similarity, 440 diff lines)	open
mentions	site/examples/ts/mentions.tsx	source now reads very close to legacy (0.970 similarity, 233 diff lines); current browser proof for chips, portal, and insertion is green	recovered
paste-html	site/examples/ts/paste-html.tsx	source now reads close to legacy (0.820 similarity, 233 diff lines), and Chromium proof for the supported explicit formatting subset is green for bold and code	recovered
plaintext	site/examples/ts/plaintext.tsx	source now reads close to legacy again after dropping the extra type-only drift and restoring the minimal example shell; current browser proof for typing is green	recovered
read-only	site/examples/ts/read-only.tsx	source now reads close to legacy again after dropping the extra type-only drift and preserving the minimal readOnly shell; current browser proof for non-editability is green	recovered
richtext	site/examples/ts/richtext.tsx	source now reads close to legacy (0.874 similarity, 225 diff lines), and Chromium proof is green for render, browser text insertion, and undo restoring deleted selected rich text	recovered
scroll-into-view	site/examples/ts/scroll-into-view.tsx	current dedicated row exists in scroll-into-view.test.ts; source is still not close (0.232 similarity, 194 diff lines) and the mirrored legacy/current action is still red	open
search-highlighting	site/examples/ts/search-highlighting.tsx	source now reads close to legacy again after restoring the legacy search/decorate flow, Slate wrapper, and contributor-facing input shell; remaining forced drift is the current projectionStore + renderSegment wiring instead of legacy decorate + renderLeaf; current browser proof for two highlighted matches is green	recovered
shadow-dom	site/examples/ts/shadow-dom.tsx	current + legacy rows exist, but the source diff still reads materially rewritten (0.120 similarity, 86 diff lines)	open
styling	site/examples/ts/styling.tsx	current + legacy rows exist, but the source diff still reads materially rewritten (0.384 similarity, 103 diff lines)	open
tables	site/examples/ts/tables.tsx	current + legacy rows exist, but the source diff still reads like a rewrite (0.036 similarity, 270 diff lines)	open

2026-04-15 Git-Diff Rebaseline

This pass invalidates or upgrades rows from the source diff itself instead of from browser feel.

Example	Source-diff read	Ledger result
code-highlighting	still full rewrite in diff	stays open
check-lists	now source-close after the actual port; remaining source drift is limited to current type/module syntax	upgraded back to recovered
custom-placeholder	source now reads as the legacy example with current import syntax, and custom placeholder proof is green	upgraded to recovered
forced-layout	rebaseline invalidated it as open, but the continuation batch restored the legacy source flow and green delete proof	upgraded to recovered
markdown-preview	still full rewrite in diff	invalidated back to open
markdown-shortcuts	still full rewrite in diff	invalidated back to open
plaintext	source-close again after the minimal same-path cleanup	upgraded to recovered
read-only	source-close again after the minimal same-path cleanup	upgraded to recovered
shadow-dom	still materially rewritten in diff	invalidated back to open
styling	still materially rewritten in diff	invalidated back to open
tables	still full rewrite in diff	invalidated back to open
embeds	now source-close after the actual port	upgraded to recovered
hovering-toolbar	now source-close after the actual port	upgraded to recovered
iframe	now source-close after the actual port	upgraded to recovered
inlines	now source-close after the actual port	upgraded to recovered
mentions	now source-close after the actual port	upgraded to recovered
paste-html	now source-close and formatting proof is green	upgraded to recovered
richtext	now source-close and undo/typing proof is green	upgraded to recovered
search-highlighting	continuation batch restored the legacy search/decorate shape and green highlight proof	upgraded to recovered
editable-voids	now much closer in diff and embedded-form proof is green	upgraded to recovered
images	now much closer in diff and prompt/delete proof is green	upgraded to recovered

Source-Diff Stats

Exact paired same-path source stats from the 2026-04-15 rebaseline:

Example	Similarity	Legacy lines	Current lines	Diff lines
android-tests	0.732	266	281	209
check-lists	0.861	198	203	122
code-highlighting	0.062	473	277	674
custom-placeholder	0.234	36	61	77
editable-voids	0.568	166	168	194
embeds	0.763	160	168	122
forced-layout	0.043	121	151	240
hovering-toolbar	0.856	178	157	135
huge-document	0.021	1040	574	1492
iframe	0.917	183	182	117
images	0.699	222	224	192
inlines	0.850	454	432	334
markdown-preview	0.082	138	182	286
markdown-shortcuts	0.086	247	287	440
mentions	0.970	746	747	233
paste-html	0.820	305	294	233
plaintext	0.322	24	34	42
read-only	0.301	25	35	42
richtext	0.874	328	349	225
scroll-into-view	0.232	136	116	194
search-highlighting	0.170	141	197	278
shadow-dom	0.120	48	58	86
styling	0.384	47	68	103
tables	0.036	215	145	270

Stable Or Explicitly Owned Rows After Git-Diff Rebaseline

• android-tests: explicit extended parity row
• huge-document: explicit cut for parity; same-path source is the legacy chunking playground, while v2 huge-doc runtime truth is owned by large-document-runtime and benchmark gates
• check-lists: source-close recovered row
• custom-placeholder: source-close recovered row
• embeds: source-close recovered row
• forced-layout: source-close recovered row
• hovering-toolbar: source-close recovered row
• iframe: source-close recovered row
• inlines: source-close recovered row
• mentions: source-close recovered row
• plaintext: source-close recovered row
• read-only: source-close recovered row
• search-highlighting: source-close recovered row
• scroll-into-view: still open, and now explicitly open on source diff too

Legacy Playwright Drift

Legacy test	Current owner	Current read
select.test.ts	richtext.test.ts	recovered; the triple-click paragraph-selection intent is explicitly owned on the current richtext browser seam
huge-document.test.ts	benchmark lanes + large-document-runtime.test.ts	explicit cut; the legacy test asserts old chunking internals, while v2 huge-doc behavior is owned by the runtime browser rows and 5000-block benchmark gate

Current-Only TS Example Surfaces

All currently live current-only TS example surfaces in .tmp/slate-v2 are classified here.

Broader draft-only names that do not currently map to live files in .tmp/slate-v2/site/examples/ts/** stay in the draft docs until they exist in the repo.

• already classified current-only v2 north-star rows:
  • external-decoration-sources: extended current-only explicit external overlay-source example; Chromium proof is green and the surface is a deliberate v2 addition rather than same-path parity debt
  • highlighted-text: extended current-only overlap-safe highlight example; Chromium proof is green and the surface is a deliberate v2 overlay owner, not a missing legacy port
  • persistent-annotation-anchors: extended current-only durable-annotation anchor example; Chromium proof is green and the surface is deliberate v2 value beyond the legacy example set
  • review-comments: extended current-only review UI example; Chromium proof is green and the surface is deliberate v2 annotation/widget value beyond the legacy example set
• broader browser/input parity rows that do not currently map to live example or Playwright files stay tracked in true-slate-rc-proof-ledger.md, not here

Next Recovery Batch

Highest-signal immediate recoveries after the git-diff invalidation:

1. recover the still-full-rewrite rows first:
   • code-highlighting
   • markdown-preview
   • markdown-shortcuts
   • tables
2. recover the remaining materially rewritten same-path rows:
   • shadow-dom
   • styling
3. finish the remaining open rows:
   • code-highlighting
   • custom-placeholder
   • markdown-preview
   • markdown-shortcuts
   • scroll-into-view
   • shadow-dom
   • styling
   • tables
4. finish the already-open parity row:
   • scroll-into-view
5. classify current-only rewrite unlocks as extended, mixed, explicit cut, or open