Existing Feature Coverage Matrix for Plate

This is the major-release coverage gate for Plate's existing editor features.

Despite the filename, this file is no longer only about markdown-native constructs. The major can break any existing content-affecting feature, so the matrix needs to track:

• markdown-native behavior
• markdown extensions
• block-editor-native elements
• document styling and layout behavior
• collaboration and editor-only content surfaces

Use this with:

• markdown-standards.md
• markdown-editing-spec.md
• editor-protocol-matrix.md
• markdown-editing-reference-audit.md

This file is not the exhaustive scenario matrix. It answers:

• which feature families exist
• which ones are covered enough for release
• which ones are deferred

Authority Model

Use the strongest external precedent available for each concrete surface.

This family table is routing guidance only. It does not pre-decide every row.

Family	Common Parse / Serialize Candidates	Common UX Candidates	Common Cross-Checks / Adjacent Refs	Fallback
Markdown-native syntax	CommonMark / GFM / GitHub Docs for GFM-only constructs / LaTeX-style math / MDX when applicable	Typora when the concrete surface really matches markdown-first editing intent	Milkdown, GitHub Docs, or other stronger surface-specific refs	explicit repo decision only if refs disagree or are silent
Markdown mode architecture and note-linked navigation	current serialized shape or editor-only contract where needed	Obsidian when the concrete surface is truly dual-mode or note-linked	Google Docs, Typora, or other stronger navigation refs	fallback only when stronger navigation precedent runs out
Block-editor-native elements	feature's current serialized shape or explicit non-markdown contract	Notion when the concrete element actually matches block-editor-native behavior	Milkdown, then the strongest adjacent mainstream precedent	fallback only when no clear external standard exists
Tables and linear document editing	GFM / HTML table rules when applicable	Google Docs when the concrete surface is really document/table behavior	Obsidian, Notion, Milkdown, or another stronger row-level ref	fallback only after stronger table precedent runs out
Collaboration and reviewing	current serialized shape or editor-only contract	Google Docs when the concrete collaboration surface matches review-style behavior	Notion or the stronger collaboration precedent for the row	fallback only after stronger collaboration precedent runs out
Styling and layout	current serialized shape plus HTML / CSS expectations where relevant	Google Docs when the concrete styling surface matches document-style editing	Notion or the stronger adjacent precedent for the row	fallback only after stronger styling precedent runs out

Status Meaning

• locked: strong enough to build on without blocking the major
• partial: existing feature works, but the contract or coverage is still thin
• gap: existing feature is under-specified, lossy, or weakly covered
• profile-divergence: existing feature works, but it is outside the strict markdown-first profile and still needs explicit behavior policy
• deferred-minor: not part of this major even though the parser or docs mention it

Scope Rule

This file tracks existing content-affecting surfaces only.

It does not try to gate:

• AI workflows
• slash menu / toolbar UI
• docx / html / csv export quality unless it changes editor behavior
• browser-only chrome around the editor

How To Read A Row

• Node Model / Affinity records whether the feature is void plus its inline affinity class when one exists
• Behavior Scope is the user-facing behavior that must be spec'd
• Current Evidence lists representative seams, not every test
• Next Work is the concrete remaining work for the major lane
• Editing Spec IDs should point to concrete spec IDs or the pending family ID

Markdown-Native Core

Feature	Family	Node Model / Affinity	Parse Authority	Primary UX Ref	Secondary Ref	Behavior Scope	Editing Spec IDs	Current Evidence	Next Work	Status
Paragraph	markdown-native	block non-void; n/a	CommonMark	Typora	Milkdown	↵, ⌫, ⇥, ⇤, root-empty behavior	EDIT-P-*	packages/markdown/src/lib/deserializer/deserializeMd.spec.ts
packages/indent/src/lib/withIndent.spec.tsx
apps/www/src/__tests__/package-integration/markdown-rich/serializeMd.spec.tsx	finish explicit non-empty root ⌫ fallback	locked
Heading	markdown-native	block non-void; n/a	CommonMark	Typora	Milkdown	split, reset, depth-specific behavior	EDIT-H-*	packages/markdown/src/lib/deserializer/deserializeMd.spec.ts
packages/markdown/src/lib/serializer/convertNodesSerialize.spec.ts
packages/core/src/lib/plugins/override/withBreakRules.spec.tsx
packages/core/src/lib/plugins/override/withDeleteRules.spec.tsx	no active major blocker	locked
Blockquote	markdown-native	block non-void container; n/a	CommonMark	Typora	Milkdown	nested blocks, empty exit, ⌫, ⇤, quoted list interaction	EDIT-BQ-*	packages/markdown/src/lib/deserializer/deserializeMd.spec.ts
packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/core/src/lib/plugins/override/withBreakRules.spec.tsx
packages/core/src/lib/plugins/override/withDeleteRules.spec.tsx	no active major blocker	locked
Unordered list	markdown-native	block non-void container; n/a	CommonMark	Typora	Milkdown	split, exit, outdent, quoted-list interaction	EDIT-LIST-*	packages/markdown/src/lib/deserializer/deserializeMdList.spec.tsx
packages/list/src/lib/withList.spec.tsx
packages/core/src/lib/plugins/override/withDeleteRules.spec.tsx	richer mixed-document editing matrices	locked
Ordered list	markdown-native	block non-void container; n/a	CommonMark	Typora	Milkdown	restart numbering, split, exit, outdent	EDIT-LIST-*	packages/markdown/src/lib/deserializer/deserializeMdList.spec.tsx
packages/markdown/src/lib/serializer/standardList.spec.tsx
packages/list/src/lib/withList.spec.tsx	no active major blocker	locked
Link	markdown-native	inline non-void span; directional	CommonMark	Typora	Milkdown	round-trip, directional affinity, plain-link paragraphs, source-entry interaction	EDIT-AFF-LINK-001, EDIT-LINK-CLICK-*, EDIT-INTERACT-*	packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/markdown/src/lib/deserializer/deserializeMentionLink.spec.tsx
packages/core/src/lib/plugins/affinity/AffinityPlugin.spec.tsx
content/(plugins)/(elements)/link.mdx	current link law is covered; denser transform permutations still live in protocol rows instead of the backlog	locked
Image	markdown-native	block void media atom; n/a	CommonMark	Typora	Milkdown	alt vs title, attribute precedence, plain-image paragraphs, source-entry interaction	EDIT-IMG-*, EDIT-INTERACT-*	packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/markdown/src/lib/defaultRules.spec.ts
apps/www/src/__tests__/package-integration/markdown-rich/serializeMd.spec.tsx	plain markdown image output is limited to alt, src, and optional title; width/height remain HTML/MDX-only	locked
HTML block	markdown-native	block non-void; n/a	CommonMark HTML block semantics	Typora	Milkdown	source-canonical editable HTML block source as a source-entry surface, with richer rendered edit chrome deferred	EDIT-INTERACT-*	docs/research/sources/typora/links-images-and-html-behavior.md
docs/research/decisions/links-images-and-html-share-a-source-entry-surface.md
docs/research/concepts/source-entry-surface.md
packages/markdown/src/lib/deserializer/deserializeMd.spec.ts
packages/markdown/src/lib/deserializer/utils/customMdxDeserialize.spec.ts
docs/editor-behavior/editor-protocol-matrix.md	current Plate evidence now covers the source-canonical HTML-block surface honestly enough to lock it; richer rendered HTML-block chrome is deferred as a later product lane	locked
Emphasis / italic	markdown-native	leaf mark; directional	CommonMark	Typora	Milkdown	round-trip and markdown-native parse/serialize behavior	EDIT-AFF-MARK-001	packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/autoformat/src/lib/__tests__/withAutoformat/mark/basic-marks.spec.tsx	no active major blocker	locked
Strong / bold	markdown-native	leaf mark; directional	CommonMark	Typora	Milkdown	round-trip and markdown-native parse/serialize behavior	EDIT-AFF-MARK-001	packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/markdown/src/lib/serializer/convertNodesSerialize.spec.ts	no active major blocker	locked
Inline code	markdown-native	leaf mark; hard	CommonMark	Typora	Milkdown	round-trip, hard-edge typing, mixed-mark behavior	EDIT-AFF-HARD-001	packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/core/src/lib/plugins/affinity/AffinityPlugin.spec.tsx
packages/markdown/src/lib/serializer/convertTextsSerialize.spec.ts	no active major blocker	locked
Fenced code block	markdown-native	block non-void owner; n/a	CommonMark	Typora	Milkdown	direct raw markdown, ↵, ⌫, ⇥, ⇤, language preservation	EDIT-CB-*	packages/markdown/src/lib/deserializer/deserializeMd.spec.ts
packages/code-block/src/lib/withCodeBlock.spec.tsx
packages/code-block/src/react/CodeBlockPlugin.spec.tsx	no active major blocker	locked
Thematic break	markdown-native	block void atom; n/a	CommonMark	Typora	Milkdown	creation and adjacent block behavior	EDIT-HR-*	packages/markdown/src/lib/serializer/convertNodesSerialize.spec.ts
packages/markdown/src/lib/deserializer/convertNodesDeserialize.spec.ts	no active major blocker	locked
Hard line break	markdown-native	text token; n/a	CommonMark + HTML fallback	Typora	Milkdown	paragraph and blockquote parity, html fallback, trailing breaks	EDIT-HARD-*	packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/markdown/src/lib/deserializer/splitLineBreaks.spec.tsx
apps/www/src/__tests__/package-integration/markdown-rich/serializeMd.spec.tsx	no active major blocker	locked

Markdown Extensions

Feature	Family	Node Model / Affinity	Parse Authority	Primary UX Ref	Secondary Ref	Behavior Scope	Editing Spec IDs	Current Evidence	Next Work	Status
Task list	markdown extension	block non-void container; n/a	GFM / GitHub Docs	Typora	Milkdown	checked-state round-trip, list editing rules	EDIT-LIST-*	packages/markdown/src/lib/taskList.spec.ts
packages/markdown/src/lib/deserializer/deserializeMdList.spec.tsx
packages/markdown/src/lib/serializer/listToMdastTree.spec.ts
packages/list/src/lib/normalizers/withInsertBreakList.spec.tsx
packages/list/src/lib/withList.spec.tsx	no active major blocker	locked
Table	markdown extension	block non-void grid owner; n/a	GFM	Google Docs	Notion, Milkdown	cell nav, ↵, ⇥/⇤, ⌫, multi-cell selection, copy/paste, merge/split, row/column insert/delete, deserialize/serialize, and intentional inline `
` fallback for multi-paragraph cell content	EDIT-TABLE-*	packages/markdown/src/lib/table.spec.ts
packages/table/src/lib/withTable.spec.tsx
packages/table/src/lib/withApplyTable.spec.tsx
packages/table/src/lib/withDeleteTable.spec.tsx
packages/table/src/lib/withTableCellSelection.spec.tsx
packages/table/src/lib/withInsertFragmentTable.spec.tsx
packages/table/src/lib/transforms/*.spec.tsx
packages/table/src/lib/merge/*.spec.tsx
apps/www/src/__tests__/package-integration/markdown-rich/serializeMd.spec.tsx	multi-paragraph cells intentionally degrade to inline `
` fallback because plain markdown table syntax cannot carry nested block structure	locked
Strikethrough	markdown extension	leaf mark; directional	GFM / GitHub Docs	Typora	Milkdown	round-trip as a markdown deletion mark	EDIT-AFF-MARK-001	packages/basic-nodes/src/lib/BaseStrikethroughPlugin.ts
packages/basic-nodes/src/lib/BaseMarkPlugins.spec.ts
packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/markdown/src/lib/serializer/serializeInlineMd.spec.ts	no active major blocker	locked
Highlight	markdown extension	leaf mark; directional	local MDX mark contract	Typora	Milkdown	<mark> round-trip and mark toggling	EDIT-MARK-MDX-*, EDIT-AFF-MARK-001	packages/basic-nodes/src/lib/BaseHighlightPlugin.ts
packages/markdown/src/lib/mdxMarks.spec.tsx
content/(plugins)/(marks)/highlight.mdx	existing plugin and markdown surface are covered	locked
Subscript	markdown extension	leaf mark; directional	local MDX mark contract	Typora	Milkdown	<sub> round-trip and mutual exclusion with superscript	EDIT-MARK-MDX-*, EDIT-AFF-MARK-001	packages/basic-nodes/src/lib/BaseSubscriptPlugin.ts
packages/markdown/src/lib/mdxMarks.spec.tsx
content/(plugins)/(marks)/subscript.mdx	existing plugin and markdown surface are covered	locked
Superscript	markdown extension	leaf mark; directional	local MDX mark contract	Typora	Milkdown	<sup> round-trip and mutual exclusion with subscript	EDIT-MARK-MDX-*, EDIT-AFF-MARK-001	packages/basic-nodes/src/lib/BaseSuperscriptPlugin.ts
packages/markdown/src/lib/mdxMarks.spec.tsx
content/(plugins)/(marks)/superscript.mdx	existing plugin and markdown surface are covered	locked
Emoji shortcode	markdown extension	text token after parse; n/a	local remark plugin contract	Typora	GitHub Docs	:shortcode: parse in the default markdown profile	EDIT-EMOJI-*	packages/markdown/src/lib/emojiSurface.spec.tsx
packages/markdown/src/lib/__tests__/createTestEditor.tsx
apps/www/src/registry/components/editor/plugins/markdown-kit.tsx	shortcode input is covered; the current contract normalizes to unicode text on serialize	locked
Inline math	markdown extension	inline void atom; n/a	LaTeX-style math / KaTeX conventions	Typora	Milkdown	round-trip, boundary behavior, inline/table interaction	EDIT-MATH-*	packages/markdown/src/lib/mathSurface.spec.ts
packages/math/src/lib/BaseInlineEquationPlugin.spec.ts
packages/math/src/lib/transforms/insertInlineEquation.spec.ts
packages/math/src/react/hooks/useEquationInput.spec.tsx	no active major blocker	locked
Block math	markdown extension	block void atom; n/a	LaTeX-style math / KaTeX conventions	Typora	Milkdown	round-trip, empty exit, block selection behavior	EDIT-MATH-*	packages/markdown/src/lib/mathSurface.spec.ts
packages/math/src/lib/BaseEquationPlugin.spec.ts
packages/math/src/lib/transforms/insertEquation.spec.ts
apps/www/src/__tests__/package-integration/ai-chat-streaming/streamSerializeMd.slow.tsx	no active major blocker	locked
Autolink literal	markdown extension	inline non-void link span; directional	GFM / GitHub Docs	Typora	Milkdown	bare URL parse/serialize and editing	EDIT-AFF-LINK-001	packages/link/src/lib/withLink.spec.tsx
packages/markdown/src/lib/gfmSurface.spec.ts	no active major blocker	locked
Footnote	markdown extension	inline void ref atom + block non-void definition; n/a	GFM / GitHub Docs	Typora	Milkdown	reference/definition round-trip, insert flow, registry-backed lookup helpers, duplicate-definition normalization and repair, navigation helpers, shared navigation feedback, and dedicated node model	EDIT-FOOTNOTE-*, EDIT-NAV-FEEDBACK-*	packages/markdown/src/lib/gfmSurface.spec.ts
packages/footnote/src/lib/BaseFootnoteReferencePlugin.ts
packages/footnote/src/lib/BaseFootnoteDefinitionPlugin.ts
packages/footnote/src/lib/registry.ts
packages/footnote/src/lib/queries/footnoteRegistry.spec.ts
packages/footnote/src/lib/transforms/insertFootnote.spec.ts
packages/footnote/src/lib/BaseFootnotePlugins.spec.ts
packages/markdown/src/lib/rules/defaultRules.ts
apps/www/src/registry/components/editor/transforms.ts
apps/www/src/registry/ui/slash-node.tsx
apps/www/src/registry/ui/footnote-node.spec.tsx	no active major blocker	locked

Block-Editor-Native Existing Elements

Feature	Family	Node Model / Affinity	Parse Authority	Primary UX Ref	Secondary Ref	Behavior Scope	Editing Spec IDs	Current Evidence	Next Work	Status
Mention	block-editor-native	inline void atom; n/a	local mention markdown contract	Notion	Milkdown	inline insertion, spacing, keyboard access, markdown mention link round-trip	EDIT-MENTION-*	packages/mention/src/lib/BaseMentionPlugin.spec.tsx
packages/mention/src/lib/getMentionOnSelectItem.spec.tsx
packages/markdown/src/lib/deserializer/deserializeMentionLink.spec.tsx
packages/markdown/src/lib/serializer/serializeMention.spec.ts	explicit local contract informed by mainstream mention-chip behavior	locked
Callout	block-editor-native	block non-void container; n/a	local MDX callout contract	Notion	Milkdown	insert, nested content, keyboard behavior, markdown round-trip	EDIT-CALLOUT-*	packages/callout/src/lib/BaseCalloutPlugin.spec.ts
packages/callout/src/lib/transforms/insertCallout.spec.ts
packages/core/src/lib/plugins/override/withBreakRules.spec.tsx
packages/core/src/lib/plugins/override/withDeleteRules.spec.tsx
packages/markdown/src/lib/mdx.spec.tsx	explicit local contract; not claimed as a stronger external standard than the evidence supports	locked
Toggle	block-editor-native	block non-void container; n/a	current toggle node contract	Notion	Milkdown	open/close, nested blocks, ↵, ⌫, ⇥, ⇤	EDIT-TOGGLE-*	packages/toggle/src/lib/BaseTogglePlugin.spec.ts
packages/toggle/src/lib/queries/someToggle.spec.ts
packages/toggle/src/react/hooks/toggleHooks.spec.tsx
packages/toggle/src/react/queries/toggleQueries.spec.ts
packages/toggle/src/react/withToggle.spec.tsx	behavior is specified; implementation work stays in the planned toggle rewrite lane	deferred-minor
Date	block-editor-native	inline void atom; n/a	local MDX date contract	Notion	Google Docs	inline insertion, adjacency checks, keyboard access, markdown round-trip	EDIT-DATE-*	packages/date/src/lib/BaseDatePlugin.spec.tsx
packages/date/src/lib/transforms/insertDate.spec.tsx
packages/date/src/lib/utils/dateValue.spec.ts
packages/date/src/lib/queries/isPointNextToNode.spec.tsx
packages/markdown/src/lib/dateElement.spec.ts
apps/www/src/registry/ui/date-node.spec.tsx
apps/www/src/registry/ui/date-node-static.spec.tsx	canonical YYYY-MM-DD node values are locked; markdown writes canonical dates as <date value=\"...\" />, dual-reads legacy child-text, and preserves non-normalizable legacy text on a raw fallback path	locked
TOC	block-editor-native	block void atom shell + generated entry overlay controls; n/a	local MDX TOC contract	Notion	Typora, Google Docs	insert, atomic boundary behavior, navigation-only activation, keyboard activation, active-section tracking, shared navigation feedback, scrolling hooks, serialization policy	EDIT-TOC-*, EDIT-NAV-FEEDBACK-*	packages/toc/src/lib/BaseTocPlugin.spec.ts
packages/toc/src/lib/transforms/insertToc.spec.ts
packages/toc/src/react/hooks/*.spec.tsx
apps/www/src/registry/ui/toc-node.spec.tsx
packages/markdown/src/lib/mdx.spec.tsx	explicit local contract with split shell-vs-navigation authorities; not sold as a strong public standard	locked
Column group / column item	block-editor-native	block non-void container; n/a	local MDX column contract	Notion	docs reference	insert, split, move, select-all, nested editing, serialization	EDIT-COLUMN-*	packages/layout/src/lib/withColumn.spec.ts
packages/layout/src/lib/transforms/insertColumnGroup.spec.ts
packages/layout/src/lib/transforms/insertColumn.spec.ts
packages/layout/src/lib/transforms/toggleColumnGroup.spec.tsx
packages/layout/src/lib/transforms/setColumns.spec.tsx
packages/markdown/src/lib/columnSurface.spec.ts	explicit local contract; not sold as a strong public standard	locked
Media embed	block-editor-native	block void atom; n/a	local media MDX contract	Notion	docs reference	embed insertion, editing, serialization	EDIT-MEDIA-*	packages/media/src/lib/media-embed/BaseMediaEmbedPlugin.spec.ts
packages/media/src/lib/media-embed/transforms/insertMediaEmbed.spec.ts
packages/media/src/lib/BaseMediaPluginContracts.spec.ts
packages/media/src/lib/media/parseMediaUrl.spec.ts
packages/media/src/lib/media-embed/parseIframeUrl.spec.ts
packages/media/src/lib/media-embed/parseVideoUrl.spec.ts
packages/media/src/lib/media-embed/parseTwitterUrl.spec.ts
packages/media/src/react/media/FloatingMedia/submitFloatingMedia.spec.ts
packages/media/src/react/media/useMediaState.spec.ts
packages/markdown/src/lib/mediaSurface.spec.ts
apps/www/src/registry/ui/media-video-node.spec.tsx	normalized embed metadata is locked for the current contract: canonical render url, current provider / id, optional sourceUrl for edit reversibility, and allowlisted Twitter/X snippet extraction; broader script/embed behavior and PDF remain outside the contract	locked
Image / file / audio / video blocks	block-editor-native	block void media node + non-void caption helper; n/a	local media contracts	Notion	Google Docs for file-ish behavior	insert, caption/title, selection, serialization	EDIT-MEDIA-*	packages/media/src/lib/BaseMediaPluginContracts.spec.ts
packages/media/src/lib/image/withImageEmbed.spec.tsx
packages/media/src/lib/image/withImageUpload.spec.tsx
packages/media/src/lib/media/insertMedia.spec.ts
packages/media/src/lib/placeholder/BasePlaceholderPlugin.spec.ts
packages/media/src/react/placeholder/utils/history.spec.ts
packages/markdown/src/lib/commonmarkSurface.spec.ts
packages/markdown/src/lib/mediaSurface.spec.ts
packages/markdown/src/lib/rules/utils/parseAttributes.spec.ts	current media node, placeholder, and MDX attribute contract is locked; richer source-entry and file-system semantics stay deferred	locked
Code drawing / Excalidraw	block-editor-native	block void atom; n/a	local non-markdown contract	Notion-like board tools	docs reference	insertion, selection, serialization policy	EDIT-DRAWING-*	packages/code-drawing/src/lib/transforms/insertCodeDrawing.spec.ts
packages/code-drawing/src/lib/BaseCodeDrawingPlugin.spec.ts
packages/excalidraw/src/lib/transforms/insertExcalidraw.spec.ts
packages/excalidraw/src/lib/BaseExcalidrawPlugin.spec.ts	behavior is specified; richer product work still stays in a later release lane	deferred-minor
Caption	block-editor-native helper	block non-void helper; n/a	local caption contract	Notion	Google Docs	movement into/out of captions, media integration	EDIT-CAPTION-*	packages/caption/src/lib/withCaption.spec.tsx	explicit local contract informed by media-caption behavior in block editors and docs tools	locked

Document Styling And Layout

Feature	Family	Node Model / Affinity	Parse Authority	Primary UX Ref	Secondary Ref	Behavior Scope	Editing Spec IDs	Current Evidence	Next Work	Status
Indent	styling/layout	block non-void property; n/a	local block style contract	Google Docs	Notion	paragraph indent, interaction with quote/list owners	EDIT-INDENT-*	packages/indent/src/lib/withIndent.spec.tsx
packages/indent/src/lib/transforms/setIndent.spec.ts
packages/list/src/lib/withList.spec.tsx
content/(plugins)/(styles)/indent.mdx	explicit local style contract informed by Docs-style paragraph indentation	locked
Text align	styling/layout	block non-void property; n/a	local block style contract	Google Docs	Notion	align transform, affected blocks, serialization policy	EDIT-ALIGN-*	packages/basic-styles/src/lib/BaseTextAlignPlugin.spec.ts
content/(plugins)/(styles)/text-align.mdx	explicit local style contract informed by Docs-style alignment controls	locked
Text indent	styling/layout	block non-void property; n/a	local block style contract	Google Docs	Notion	indent transform, interaction with paragraph/list/quote	EDIT-TEXT-INDENT-*	packages/basic-styles/src/lib/BaseTextIndentPlugin.spec.ts	explicit local style contract informed by Docs-style indentation controls	locked
Line height	styling/layout	block non-void property; n/a	local style contract	Google Docs	Notion	application/removal, affected blocks, serialization policy	EDIT-LINE-HEIGHT-*	packages/basic-styles/src/lib/BaseLineHeightPlugin.spec.ts	explicit local style contract informed by document-style spacing controls	locked
Font family / size / weight / color / background	styling/layout	leaf style marks; directional	local style span contract	Google Docs	Notion	mark boundaries, serialization policy, mixed markdown behavior	EDIT-STYLE-*, EDIT-AFF-MARK-001	packages/basic-styles/src/lib/BaseFontFamilyPlugin.spec.ts
packages/basic-styles/src/lib/BaseFontSizePlugin.spec.ts
packages/basic-styles/src/lib/BaseFontWeightPlugin.spec.ts
packages/basic-styles/src/lib/BaseFontColorPlugin.spec.ts
packages/basic-styles/src/lib/BaseFontBackgroundColorPlugin.spec.ts
packages/markdown/src/lib/rules/fontRules.ts	explicit local style contract informed by document-style formatting controls	locked

Collaboration And Editor-Only Existing Features

Feature	Family	Node Model / Affinity	Parse Authority	Primary UX Ref	Secondary Ref	Behavior Scope	Editing Spec IDs	Current Evidence	Next Work	Status
Comment	collaboration	leaf metadata mark; outward	editor-only contract	Google Docs	Notion	mark boundaries, creation/removal, serialization exclusion	EDIT-COMMENT-*	packages/comment/src/lib/BaseCommentPlugin.spec.ts
packages/comment/src/lib/utils/getCommentKeys.spec.ts
packages/comment/src/lib/utils/getCommentCount.spec.ts
packages/markdown/src/lib/rules/defaultRules.ts	behavior is specified; implementation hardening still belongs to the collaboration lane	deferred-minor
Suggestion	collaboration	leaf metadata mark plus block suggestion wrapper; outward	editor-only contract	Google Docs	Notion	suggestion ranges, insertion/deletion behavior, serialization exclusion	EDIT-SUGGESTION-*	packages/suggestion/src/lib/BaseSuggestionPlugin.spec.ts
packages/suggestion/src/lib/withSuggestion.spec.tsx
packages/suggestion/src/lib/transforms/acceptSuggestion.spec.tsx
packages/suggestion/src/lib/transforms/rejectSuggestion.spec.tsx
packages/suggestion/src/lib/insertBreakSuggestion.spec.tsx
packages/suggestion/src/lib/transforms/deleteSuggestion.spec.ts
packages/markdown/src/lib/rules/defaultRules.ts	behavior is specified; implementation hardening still belongs to the collaboration lane	deferred-minor
Discussion	collaboration	overlay / anchor surface; n/a	editor-only contract	Google Docs	Notion	anchor behavior, selection coupling, serialization exclusion	EDIT-DISCUSSION-*	docs surface only	behavior is specified; product implementation work still belongs to the collaboration lane	deferred-minor
Yjs cursor / collaboration overlays	collaboration	overlay / no node; n/a	editor-only contract	Google Docs	Figma/Notion	concurrent cursor and presence behavior	EDIT-COLLAB-*	docs and package surfaces	behavior is specified; implementation hardening still belongs to the collaboration lane	deferred-minor

Current Major Gate

The active major-release gate is now closed.

Search / find-replace stays outside the active gate for now.

The behavior law and protocol rows exist, but the editor search surface is still intentionally deferred until that product lane is picked up for real.

What is considered closed for this major:

1. markdown-native release-critical behavior
2. the main existing-feature editor behavior seams that were actually changing or clearly under-specified:
   • blockquote
   • list
   • heading
   • code block
   • table core behavior
   • indentation ownership
   • callout reset/soft-break behavior
   • mention/date/TOC boundary behavior
   • column package-surface round-trip
   • media/caption package-surface behavior

What remains outside this closed major but still belongs in the editor-behavior backlog:

• markdown-feature follow-up:
  • typed syntax-trigger conversion surfaces inside the broader source-preserving conversion family are split:
    • link automd now ships through the richer link/source-entry interaction lane while staying outside the plain autoformat family
    • math delimiter triggers now ship a safe rich-mode slice:
      • completed $...$ converts to inline math on the closing delimiter
      • $$ + Enter promotes to block math
      • selection-wrap stays deferred for future markdown-native or explicitly-approved profile behavior
  • if product later wants Enter-owned normalization for code-fence or horizontal-rule shorthand, that belongs to a neighboring input-rule lane, not to the closed autoformat alignment lane
  • heavier date serialized semantics beyond the current canonical YYYY-MM-DD node contract, canonical <date value=\"...\" /> write output, and legacy child-text read compatibility
  • media/embed product expansion beyond the current normalized url / provider / id / optional sourceUrl contract is explicitly deferred; it is too broad for the current markdown lane and should not be treated as the next markdown-native follow-up
• toggle rewrite lane
• editor-behavior-wide search / find-replace product lane:
  • current-file search
  • seeded search from selection
  • find next / previous
  • replace
  • search-target navigation feedback
  • outline header search
  • this is a cross-surface editor-behavior lane, not a markdown-native lane
• code-drawing / Excalidraw lane
• collaboration/editor-only lane:
  • comment
  • suggestion
  • discussion
  • yjs
• streaming improvements unless a current-feature change regresses them

Remaining Backlog Families

Use master-roadmap.md for the actual implementation order.

This section only names the backlog families that still exist outside the closed major gate.

Related Learnings

• markdown-blockquotes-must-round-trip-as-container-blocks.md
• markdown-ordered-list-restarts-must-emit-listrestartpolite.md
• markdown-images-must-not-synthesize-title-from-caption.md