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Slate v2 PR Description Reference

docs/slate-v2/references/pr-description.md

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Slate v2 PR Description Reference

Use this as the maintainer-facing PR body source. Keep it as a drift register: what belongs in the PR, why it belongs in v2, what proof exists, and what is not claimed yet.

0. Issue Coverage Accounting

The Slate v2 goal is not just "new architecture." The PR should close or materially improve the highest-value issue clusters from docs/slate-issues.

Full ledger:

Current summary:

  • Fixed issue claims: 36
  • Related issue matrix rows: 190
  • Live corpus accounting: 630 open issues, 29 open PRs, 659 open threads, and 617 gitcrawl clusters from the 2026-05-04 refresh. This is corpus accounting, not an auto-close claim.
  • Mobile/IME macro accounting: 149 frozen R7 input-runtime rows reviewed; 44 long-form proof-route rows, 59 matrix-only future-proof rows, 20 matrix-only non-claim rows, 3 matrix backfills, and 4 drift rows aligned down to related.
  • New exact Mobile/IME fixed or improved claims from the macro plan: 0.
  • Mobile/IME closure remains gated on matching raw-device or browser proof for Samsung Keyboard, Android Firefox, Android voice input, Android/iOS Chinese input, Windows IME, and other reported environments.
  • Lexical harvest issue-ledger sync added 4 related/non-claim rows from the processing backlog: #5894, #4730, #3387, and #3872. New exact fixed or improved claims from that sync: 0.
  • Yjs/collaboration readiness sync promotes #5771 from Related to Improves, with no new exact fixed issue claim.
  • Native beforeinput command-handler sync adds related rows for #3586 and #4681, and refreshes #3568, #5181, and #4317. New exact fixed or improved claims from that sync: 0.
  • Plate-fit API hard-cut sync reverses the earlier raw Slate renderer/key helper target: raw Slate keeps Editable render* and browser event props, model/runtime behavior stays in extensions, and Plate owns renderer/keymap product packaging. New exact fixed or improved claims from that sync: 0.
  • Table transform-boundary sync clarifies that Backspace/Delete/Enter table-cell boundary behavior, markdown Enter/Backspace model behavior, and richtext exit-on-Enter behavior belong in transforms.* middleware rather than raw Editable onKeyDown key branches. New exact fixed or improved claims from that sync: 0.
  • Android markdown shortcut flush sync keeps app-facing markdown behavior in transforms.insertText, removes example-side Android flush plumbing, and routes Android pending-diff timing to the input runtime. Focused unit, typecheck, lint, and markdown-shortcuts browser proof passed; raw Android device proof is still required before any exact #4532 claim. New exact fixed or improved claims from that sync: 0.
  • Editable-island / multi-root child-root planning sync changes the target example architecture only: native/app controls stay inside editable-island, rich editable island content should use same-runtime child roots, scalar document-owned fields should use state fields, and renderVoid stays content-only. New exact fixed or improved claims from that sync: 0.
  • Void roots / content-root API execution keeps ordinary voids atomic, keeps editable-island for mixed native/app controls with optional child roots, and adds the public API/lifecycle baseline for pure editor-flow child content: EditorElementSpec.contentRoot, tx.roots.create/replace/delete, and useSlateContentRoot. Keyboard projection, root payload remap, browser proof, and release-gate verification remain unclaimed. New exact fixed or improved claims from that sync: 0.

Current fixed issue claims:

  • Fixes #6013: React providers accept pre-initialized editor instances without a provider-level initialValue; editor state is seeded during editor creation.
  • Fixes #5605: The public React initialization path has no duplicate provider-level initialValue requirement.
  • Fixes #5709: React provider hook consumers receive the replacement editor when <Slate editor> changes.
  • Fixes #5233: Custom fragment format keys isolate both internal MIME payloads and embedded HTML fallback fragments.
  • Fixes #3486: Custom clipboard format keys isolate internal fragment transport.
  • Fixes #4569: insertData docs state handler ordering, return semantics, and fallback behavior.
  • Fixes #6034: The tables example keeps the caret in the final table cell when the table is the last node and ArrowDown is pressed before typing.
  • Fixes #3871: The richtext example imports browser triple-click as the clicked block only, without leaking selection into the following block.
  • Fixes #5847: Browser triple-click plus Backspace removes the selected block instead of emptying its contents.
  • Fixes #3991: Backspace from an empty paragraph immediately after a selected block void removes the paragraph and selects the void instead of deleting the void.
  • Fixes #4301: Enter on a clicked selected block void inserts an editable paragraph after the void.
  • Fixes #4074: The inlines example can type inside an editable inline at the inline edge in Chromium.
  • Fixes #3148: Inline edge selections keep the inline end and following text start distinct before text insertion in Chromium and WebKit.
  • Fixes #3429: The caret target before a padded inline stays outside the padded inline in Chromium.
  • Fixes #4789: A native selection that starts outside the editor and ends inside the editor is ignored without a DOM point crash, and the editor remains usable after refocus.
  • Fixes #5826: In a long editor, clicking the top block, blurring, scrolling to the final block, and clicking back into the editor keeps the clicked final-block selection visible instead of restoring the stale top selection.
  • Fixes #4376: WebKit blur/refocus keeps the Slate model selection and follow-up typing lands at the preserved point.
  • Fixes #5171: Firefox unfocused editor updates preserve the inactive editor selection instead of importing an external input selection.
  • Fixes #4984: A parent-editor selection that crosses into a nested editor is ignored without a DOM point crash, and input remains owned by the parent or nested editor that actually has focus.
  • Fixes #3534: Undo after pressing Enter with a selection spanning multiple blocks restores the original expanded selection.
  • Fixes #3551: Undo after a moveNodes commit restores the original tree and selection.
  • Fixes #4559: Undo after deleteFragment reselects the restored fragment.
  • Fixes #3499: Marked Enter before a bold word moves the word into the new block and undo restores the original marked paragraph and selection.
  • Fixes #4121: Core expanded delete over a formatted leaf window removes only the selected content and collapses at the selection start.
  • Fixes #2500: Core full-document delete over list-heavy content resets to one empty editable paragraph instead of preserving an orphan list shell.
  • Fixes #3965: Backspace across an empty marked block start merges same-mark text without deleting both sides.
  • Fixes #3950: Custom normalization rechecks a transformed node until later normalizers reach fixpoint.
  • Fixes #5972: Backspace from an empty editable inline in the inlines example removes the inline without deleting the preceding character.
  • Fixes #5977: Custom operation-like records no longer break editor detection or DOM path lookup, and unknown operation replay fails before the record enters the operation log.
  • Fixes #5412: insertFragment(..., { at }) writes at the supplied target instead of ambient selection.
  • Fixes #5429: insertFragment into an empty text block leaves selection after the inserted content.
  • Fixes #5089: Rich multi-block fragment paste into the middle of a paragraph preserves block separation instead of flattening into the current paragraph.
  • Fixes #4806: Selected inline void copy, paste, and cut work through the native browser clipboard path with model-owned caret repair.
  • Fixes #5080: state.nodes.entries({ reverse: true }) returns the exact reverse of the forward matched entry order for nested matching entries.
  • Fixes #6053: useElementSelected() does not throw when a selected rendered element removes itself, and useElementSelected({ at: path }) returns false after the watched path is removed.
  • Fixes #5400: Public helper value namespaces use *Api, so importing Slate helpers no longer shadows DOM globals such as Node.

Rules:

  • Keep the full matrix in the issue coverage ledger.
  • Keep issue and cluster sync progress in the live gitcrawl ledger and recluster map.
  • Keep only exact Fixes #....: <description> lines and count summaries in this accounting section.
  • Do not add issue numbers because they sound related. That is how PR bodies become bullshit.

1. Root Tooling And Runtime Baseline

Affected:

  • package.json
  • bun.lock
  • bunfig.toml
  • turbo.json
  • biome.json
  • eslint.config.mjs
  • tsconfig*.json
  • playwright.config.ts
  • site/**

Accepted current shape:

  • Bun owns install, scripts, package tests, and lockfile state.
  • Turbo owns package graph execution.
  • Biome and flat ESLint own lint/format checks.
  • tsdown owns package builds.
  • React 19.2, Next 16, TypeScript 6, and Bun test are the runtime floor.
  • The examples app serves on the Slate v2 dev ports, with Playwright running against the built Next app for integration proof.

Why it belongs in the PR:

  • The runtime target is not legacy Slate with local patches.
  • The root toolchain is part of the v2 contract because React 19, TypeScript 6, Bun, Playwright, and package source graphs shape the editor API and proof lanes.

Proof references:

  • .tmp/slate-v2/package.json
  • .tmp/slate-v2/bunfig.toml
  • .tmp/slate-v2/playwright.config.ts
  • docs/slate-v2/master-roadmap.md
  • docs/slate-v2/release-readiness-decision.md

2. Package Manifest And Source Graph Reset

Affected:

  • .tmp/slate-v2/packages/*/package.json
  • .tmp/slate-v2/packages/*/tsconfig*.json
  • .tmp/slate-v2/packages/*/src/index.ts

Accepted current shape:

  • Packages use ESM-oriented exports and package-local build/test/typecheck scripts.
  • Workspace dependencies stay local and source-first during development.
  • Public barrels expose only the v2-supported surface.
  • Dead compatibility exports do not stay public just to reduce diff size.
  • Raw Slate does not ship Markdown or table product packages. Markdown syntax policy, parsing/serialization, input rules, table maps, table commands, cell selection UX, and GFM table hooks belong in Plate or app-level feature packages.
  • Raw Slate owns the substrate those features need: schema/spec policy, transforms, selection primitives, normalization, clipboard/input hooks, and layout projection primitives.
  • slate-layout extracts leaf-level layout runs with block offsets and Slate leaf paths while preserving the existing block text fallback. Page projection exposes placed runs, visual text rects, native hit rects, decoration ranges, and generic block-local box metadata.
  • Markdown and table examples, Plate, or app-level packages supply the schema-specific adapters and fixtures for code lines, images, thematic breaks, tables, and table cells.
  • The experimental pagination example composes the layout helpers from slate-layout directly: geometry, projection, decorations, line hit rects, page frames, and mixed Markdown-shaped content stay in the example as proof, not as app-owned projection math.
  • Open architecture target: slate-layout should become the generic derived layout service for continuous and paged snapshots, with a built-in Pretext engine behind an internal boundary and slate-react consuming layout through a DOM materialization policy instead of treating pagination or virtualization as product rendering modes.
  • Pagination planning target: public beta API should stay small: pageView groups page display settings, virtualized domStrategy drives internal page/spread mounting in PagedEditable, measurementProfile is snapshot metadata, pageBreaks is opt-in strict-fidelity metadata, and table/media pagination uses generic provider/split protocols rather than a raw Slate product TableKit. This planning target adds no fixed/improved issue claim.

Why it belongs in the PR:

  • The package graph is an API boundary. Keeping legacy exports visible makes v2 look compatible where it intentionally is not.

Proof references:

  • docs/slate-v2/final-api-hard-cuts-status.md
  • docs/slate-v2/references/live-shape-register.md
  • docs/slate-v2/replacement-gates-scoreboard.md
  • .tmp/slate-v2/packages/slate-layout/test/page-layout-contract.test.ts
  • .tmp/slate-v2/site/examples/ts/pagination.tsx
  • .tmp/slate-v2/playwright/integration/examples/pagination.test.ts

3. Core Editor API Reset

Affected:

  • .tmp/slate-v2/packages/slate/src/**
  • .tmp/slate-v2/packages/slate/test/**
  • docs/slate-v2/ledgers/slate-editor-api.md
  • docs/plans/2026-05-03-slate-v2-core-editor-method-hard-cut-ralplan.md

Accepted current shape:

  • editor.read is the read boundary.
  • editor.update is the write boundary.
  • Reads use state accessors and plain helper functions.
  • Writes use transaction methods.
  • Primitive editor methods live on the editor instance.
  • Extensions use named editor, state, and tx groups.
  • EditorCommit is the post-commit truth object for subscribers and integration layers.
  • Collaboration/Yjs-style adapters use deterministic operation replay, typed commit metadata, bookmarks, and local runtime targets; raw Slate does not grow adapter-shaped public namespaces.
  • The public Editor.* static method namespace is not the v2 teaching or extension surface.
  • Public data helper values use *Api names such as NodeApi, ElementApi, PathApi, and RangeApi; model type names stay Node, Element, Path, and Range.
  • Editors compose behavior through creation-time extensions, not public with* wrappers, withEditor, or author-facing editor.extend.
  • Built-in packages expose lowercase extension factories such as history(), dom(), and react().
  • Custom extension factories use the same lower camel-case singular shape, such as editableVoid(), checklist(), mention(), or table(). Plural names are reserved for naturally plural domains such as shortcuts() or normalizers(). PascalCase NameExtension is reserved for static extension values. Plate's NamePlugin suffix belongs to Plate's product plugin layer, not raw Slate extensions.
  • Replayable extension reads live under editor.read((state) => state.<group>); replayable extension writes/actions live under editor.update((tx) => tx.<group>).
  • Installed runtime/control APIs live under editor.api.<capability>, so history controls use editor.api.history, DOM/React runtime APIs use editor.api.dom / editor.api.react, clipboard APIs use editor.api.clipboard, and public editor-bound helper namespaces such as HistoryEditor, DOMEditor, and a runtime ReactEditor namespace are not app-facing APIs. The app-facing React editor instance type is the generic extension-derived ReactEditor<Value, Extensions>.
  • One extension may install multiple public API handles. dom() installs the DOM projection/focus handle and may also install the clipboard handle. Public API keys are capability names, not package names.
  • Generic extension-aware code may use editor.getApi(extensionToken) where the token is the branded factory or static extension value. String lookup such as editor.getApi('history') and fresh-instance lookup such as editor.getApi(history()) are not public APIs.
  • Type tests must include negative contracts for uninstalled APIs, editor.getApi('history'), editor.getApi(history()), editor.api.history.undo, and editor.getApi(history).undo.
  • State node queries expose state.nodes.entries(...) for lazy all-match traversal, state.nodes.find(...) for first-match reads, and state.nodes.some(...) for boolean active checks. Use state.nodes.toArray(options, map?) only when a read or update callback needs an explicit materialized array.
  • Element void config is string-only: void: 'block', void: 'inline', void: 'markable-inline', or void: 'editable-island'. Absence means non-void; void: true is fixture data only when a matcher maps it to an explicit schema spec.
  • Mutable editor fields, direct apply extension points, direct onChange extension points, and Transforms.* teaching are outside the final public posture.

Why it belongs in the PR:

  • This is the main architectural cut. v2 is a transaction/snapshot editor, not a faster legacy namespace.

Open debt:

  • Some tests still use legacy-style fixtures such as Editor.replace. Treat that as fixture migration debt, not a public API endorsement.
  • Some legacy-oracle tests still use node data markers such as void: true. Treat those as fixture data matched into explicit string specs, not supported EditorElementSpec.void config.
  • Non-node document state fields are an architecture-ready follow-up, not a current PR claim. The accepted target is defineStateField, canonical Value = { roots, state? }, InitialValue normalization, state.getField, tx.setField, root-explicit operations, root-aware Point/Range, createEditorRuntime, createEditorView, statePatches, dirtyStateKeys, the 'state' source, useStateFieldValue, and useSetStateField, with comments external by default. Do not add fixed or improved issue counts for this target until the core/root/history/collab/react contracts in docs/plans/2026-05-20-slate-v2-non-node-editor-state-architecture-ralplan.md pass in .tmp/slate-v2. Current execution proof covers the first nine vertical slices: createEditor accepts legacy children, { children, state }, and { roots, state } initialValue shapes and exposes canonical rooted state.value.get() output; committed content operations include root: 'main', Path stays numeric/root-local, and Point/Range transforms ignore operations from other roots; createEditorRuntime owns the shared editor value while createEditorView creates root-bound read/update facades with view-local root, focus, and read-only policy; defineStateField installs persisted descriptors with initial values and state.getField; tx.setField emits operation-free statePatches, dirtyStateKeys, and the 'state' commit source, with a guard for large shared/history fields that omit patch hooks; slate-history stores state patches in history batches and undoes/redoes title changes as operation-free historic commits; collaboration adapters can import shared state patches through tx.statePatches.replay and export only collab: 'shared' patches through Editor.getCollabStatePatches; React exposes useStateFieldValue and useSetStateField, with field subscriptions filtered by dirtyStateKeys; the examples app has a browser-proven Document State route that edits document title/settings through state fields, keeps body content separate, undoes/redoes state patches, and imports a remote title patch. Current focused performance/release proof covers editor-store, history-retained memory, collab-readiness, React rerender-breadth, and root bun check; two field/root-specific benchmark script names remain missing harness coverage, not passed proof. The multi-root React DX target is one canonical <Slate editor={editor}> provider with multiple <Editable root="..."> surfaces. SlateRuntime, <Slate root="...">, createEditorView, useSlateRuntimeState, and useSlateViewState remain advanced substrate APIs for custom hosts. This is a non-claim API target for multi-root/header- footer examples, not an added issue count. A follow-up non-claim API target adds package-owned useSlateHistory and useSlateRootChrome so the canonical example does not teach app-owned history shortcut parsing, stack reads, selection metadata, active-root command routing, or RAF focus repair.
  • Structural delete and normalization now have focused core package proof for #4121/#2500/#3965/#3950. #5811 is improved by deterministic normalization loop detection. #1654 is improved by wiring existing isIsolating schema policy into collapsed Backspace and direct mergeNodes; split-specific closure remains unclaimed. #5972 is fixed by core delete target planning and the inlines example browser proof. #5977 is fixed by internal editor detection proof, DOM path lookup proof, and fail-closed unknown replay. #3964/#3973/#4357/#3499 are fixed by core/history package regression proof. #4195/#3841/#5629/#4648 remain related/non-claim rows without exact browser or punctuation-policy proof. #5412/#5429 are fixed by core insertFragment package proof for explicit target insertion and empty-block caret placement. #5089 is fixed by package and DOM clipboard proof for middle-paragraph multi-block fragment insertion. #5080 is fixed by core package proof for exact reverse matched traversal. #5684/#5028/#3885 remain related or non-claim rows.
  • Improves #5811: Custom normalization oscillation fails deterministically with a fixpoint diagnostic instead of an unbounded normalization budget.
  • Improves #1654: Existing isIsolating policy blocks collapsed Backspace and direct mergeNodes across protected containers; split-specific closure remains unclaimed.
  • Improves #5558: Operation exposes concrete built-in operation subtype guards with runtime and TypeScript narrowing proof.

Proof references:

  • docs/slate-v2/references/architecture-contract.md
  • docs/slate-v2/absolute-architecture-release-claim.md
  • docs/slate-v2/final-api-hard-cuts-status.md
  • docs/plans/2026-05-03-slate-v2-core-editor-method-hard-cut-ralplan.md
  • docs/plans/2026-05-07-slate-v2-core-structural-delete-normalization-ralplan.md
  • docs/plans/2026-05-07-slate-v2-inline-delete-boundary-repro-ralplan.md
  • docs/plans/2026-05-07-slate-v2-operation-extensibility-validation-ralplan.md
  • docs/plans/2026-05-07-slate-v2-insert-fragment-at-location-ralplan.md
  • docs/plans/2026-05-13-slate-v2-void-kind-api-ralplan.md
  • docs/plans/2026-05-20-slate-v2-non-node-editor-state-architecture-ralplan.md
  • .tmp/completion-checks/slate-v2-insert-fragment-at-location-execution.md
  • .tmp/slate-v2/packages/slate/test/public-element-void-kind-contract.ts
  • .tmp/slate-v2/packages/slate/test/schema-contract.ts
  • .tmp/slate-v2/packages/slate/test/clipboard-contract.ts
  • .tmp/slate-v2/packages/slate/test/query-contract.ts
  • .tmp/slate-v2/packages/slate/test/collab-history-runtime-contract.ts
  • .tmp/slate-v2/packages/slate/test/commit-metadata-contract.ts
  • .tmp/slate-v2/packages/slate/test/migration-backbone-contract.ts
  • .tmp/slate-v2/packages/slate/src/editor/nodes.ts
  • .tmp/completion-checks/slate-v2-editor-nodes-reverse-order-ralplan.md
  • .tmp/completion-checks/slate-v2-core-structural-delete-normalization-execution.md
  • .tmp/completion-checks/slate-v2-operation-extensibility-validation-execution.md
  • .tmp/completion-checks/slate-v2-core-caret-movement-word-insert-break-execution.md
  • .tmp/slate-v2/packages/slate/test/snapshot-contract.ts
  • .tmp/slate-v2/packages/slate/test/transaction-contract.ts

4. Support Package Closure

Affected:

  • .tmp/slate-v2/packages/slate-history/**
  • .tmp/slate-v2/packages/slate-hyperscript/**

Accepted current shape:

  • slate-history follows the transaction/commit model instead of patching mutable editor internals.
  • History integrity is tested through contract and benchmark proof.
  • slate-hyperscript exists as a v2 fixture/test authoring helper, not a compatibility sink for stale core assumptions.

Why it belongs in the PR:

  • Support packages prove the core API is usable outside the core package.
  • They also catch legacy assumptions that package-local core tests miss.

Proof references:

  • docs/slate-v2/master-roadmap.md
  • docs/slate-v2/replacement-gates-scoreboard.md
  • docs/slate-v2/references/normalization-reference.md

5. DOM Runtime Closure

Affected:

  • .tmp/slate-v2/packages/slate-dom/src/**
  • .tmp/slate-v2/packages/slate-dom/test/**

Accepted current shape:

  • slate-dom owns DOM selection export/import, clipboard policy, DOM coverage lookup, and hotkey matching.
  • DOM helpers cannot blindly assume every model point has mounted DOM.
  • Strict DOM bridge helpers still throw for direct invariant checks, while nullable resolve* helpers return null for recoverable model/DOM projection gaps.
  • Runtime recovery in slate-react uses resolver helpers instead of suppressThrow, local catch wrappers, or strict projection calls.
  • Clipboard behavior uses the model when DOM coverage says native DOM is missing or stale.
  • is-hotkey is not a dependency. Slate owns isHotkey(spec, event) in slate-dom.

Why it belongs in the PR:

  • DOM correctness is the boundary between editor model truth and browser truth.
  • v2 cannot ship selection/copy/paste behavior as accidental React behavior.

Proof references:

  • docs/plans/2026-05-03-slate-v2-hotkey-runtime-dependency-ralplan.md
  • docs/plans/2026-05-02-slate-v2-hidden-subtree-first-class-ralplan.md
  • docs/plans/2026-05-03-slate-v2-dom-present-large-doc-phase-6-plan.md
  • docs/plans/2026-05-14-slate-v2-total-runtime-error-policy-ralplan.md
  • docs/slate-v2/replacement-gates-scoreboard.md

5.1 Clipboard And Serialization Boundary

Affected:

  • .tmp/slate-v2/packages/slate/src/**
  • .tmp/slate-v2/packages/slate-dom/src/plugin/dom-clipboard-runtime.ts
  • .tmp/slate-v2/packages/slate-react/src/editable/clipboard-input-strategy.ts
  • .tmp/slate-v2/packages/slate-dom/test/clipboard-boundary.ts
  • .tmp/slate-v2/packages/slate/test/clipboard-contract.ts

Accepted current shape:

  • slate owns fragment extraction and insertion semantics.
  • slate-dom owns DataTransfer, custom fragment MIME keys, keyed embedded HTML fragment transport, plain-text fallback, and DOM coverage copy/paste policy.
  • slate-react owns browser event dispatch for copy, cut, paste, drag, and drop, then delegates payload work to editor.api.clipboard.
  • Low-level clipboard APIs stay under top-level editor.api.clipboard; raw editor does not grow a public clipboard namespace.
  • App-owned rich HTML/image/custom paste behavior runs through typed clipboard ingress handlers; insertData stays input-only and does not own output serialization or product paste-rule policy.
  • Custom fragment format keys isolate both application/${clipboardFormatKey} payloads and embedded data-slate-fragment HTML fallback. Mismatched embedded fragments fall back to safe import behavior instead of importing schema-private JSON.
  • DOM adapter settings are passed to extension factories, not wrappers: dom({ clipboardFormatKey: 'x-product-fragment' }) in the editor extensions list.
  • DOMClipboardInsertDataHandler is public from slate-dom; app-owned rich HTML/image paste behavior runs through typed clipboard ingress authoring.
  • Foreign or malformed internal fragment payloads must fail closed and fall back to safe import behavior.
  • Rich Slate fragment insertion preserves the receiving text-block type when a single text-block fragment replaces selected target text, including marked text, inline children, and full-document single-block replacement.
  • Rich multi-block fragment paste into the middle of a paragraph preserves block separation instead of flattening into the current paragraph.
  • Whole top-level block replacement keeps structural fragments as sibling units and applies them as one model operation when the selection exactly covers the target block slice.
  • Whole top-level block fragment extraction slices the selected root child range directly, so copying or cutting two blocks from a huge document does not walk and remove every unselected sibling from a pseudo-root.
  • Collaboration import replays replace_children through tx.operations.replay(...); CRDT/Yjs-style adapters lower it at their own boundary if their transport cannot represent child-window replacement atomically.
  • Selected inline void export must not assume block-void spacer DOM. Browser clipboard proof keeps deterministic HTML/text payloads, embeds the Slate fragment, avoids FEFF and neighboring text leakage, pastes into an external contenteditable target, and repairs the caret after cut.
  • Selected block void cut writes clipboard data, removes the void block once, and requests model-owned DOM repair.
  • Core model fragment extraction keeps whole-list wrappers, and delete across a list between text blocks does not leave an orphan list-item.
  • Focused DOM clipboard proof covers malformed MIME payloads, malformed embedded HTML data-slate-fragment, invalid JSON, URI-decode failures, non-array JSON, no-fallback no-op behavior, and rich fragment target-block preservation, custom-key embedded HTML acceptance/rejection, plus selected inline void copy/paste/cut ordering and selected block void cut repair.

Performance status:

  • Improves #5945: 10,000-line plaintext paste runs through one logical replace_children operation in the issue-size benchmark. Exact Fixes #5945 closure still needs a 10,000-line browser artifact for the plaintext example flow.
  • Improves #4056: the issue-size benchmark now covers populated-editor large copy and large middle paste. The latest run reports 49.35ms for copying 10,000 populated blocks and 235.22ms for pasting 10,000 plaintext lines into a 10,000-block populated editor with one logical operation. Exact Fixes #4056 closure still needs the historical browser repro.
  • Improves #5992: the 50,000-block two-node cut benchmark now lowers exact whole-child range delete to one replace_children operation. The latest issue-size run reports warm edit p50 9.95ms, warm copy-plus-delete p50 8.62ms, and operation count 1; the cold snapshot row remains visible at p50 171.91ms. Browser stress covers a 5,000-block huge-document cut row. Exact Fixes #5992 closure still needs maintainer acceptance that the benchmark plus browser stress matches the original repro.

Why it belongs in the PR:

  • Clipboard is a trust boundary. A regex hit or foreign custom MIME payload is not proof of a valid Slate fragment.
  • Missing-DOM copy/paste must use the same explicit DOM coverage policy as hidden, staged, and future virtualized regions.

Proof references:

  • docs/plans/2026-05-04-slate-v2-clawsweeper-v2-clipboard-serialization-ralplan.md
  • .tmp/slate-v2/tmp/slate-clipboard-large-payload-benchmark.json
  • .tmp/slate-v2/packages/slate-dom/src/plugin/dom-clipboard-runtime.ts
  • .tmp/slate-v2/packages/slate/src/transforms-text/insert-fragment.ts
  • .tmp/slate-v2/packages/slate-dom/test/clipboard-boundary.ts
  • .tmp/slate-v2/packages/slate/test/clipboard-contract.ts
  • .tmp/completion-checks/slate-v2-multiblock-fragment-middle-insert-execution.md
  • .tmp/slate-v2/packages/slate-react/src/editable/clipboard-input-strategy.ts
  • .tmp/completion-checks/slate-v2-clawsweeper-v2-clipboard-serialization-execution.md
  • .tmp/completion-checks/slate-v2-clawsweeper-v2-clipboard-fragment-insertion-shape-execution.md
  • .tmp/completion-checks/slate-v2-clawsweeper-v2-clipboard-inline-void-execution.md
  • .tmp/completion-checks/slate-v2-clawsweeper-v2-clipboard-structural-cut-delete-execution.md
  • .tmp/completion-checks/slate-v2-clawsweeper-v2-clipboard-api-extension-surface-execution.md

6. React Runtime Closure

Affected:

  • .tmp/slate-v2/packages/slate-react/src/**
  • .tmp/slate-v2/site/examples/**
  • .tmp/slate-v2/tests/integration/**

Accepted current shape:

  • React owns provider/hooks/primitives/editable behavior, not core editor truth.
  • React reads from editor snapshots and commit-local dirty data.
  • Selector hooks expose editor-typed operations and commit facts, including EditorSelectorOptions<TEditor> for useEditorSelector.
  • decorate stays the simple transient range API.
  • decorationSources and createDecorationSource are the scalable path for external or high-churn overlays.
  • Annotation stores and widget stores are durable overlay substrates, not product comment workflows.
  • Projection stores, projection selectors, and projection metrics are advanced runtime surfaces, not the first public docs path.
  • Default editing remains DOM-present unless an explicit rendering strategy says otherwise.
  • Public examples teach stable Slate React capabilities before React memoization ceremony: renderer registration, input rules, key commands, semantic commands, and projector options.
  • Generated browser gauntlets and v2-only examples are part of the proof surface.

Why it belongs in the PR:

  • The React package is where old Slate API habits usually leak back in.
  • The PR needs to explain that React is an adapter over a transaction editor, not the source of editor state truth.

Proof references:

  • docs/slate-v2/master-roadmap.md
  • docs/slate-v2/replacement-gates-scoreboard.md
  • docs/slate-v2/final-api-hard-cuts-status.md
  • docs/slate-v2/absolute-architecture-release-claim.md
  • docs/plans/2026-05-08-slate-v2-react-decorations-slate-issues-ralplan.md
  • .tmp/slate-v2/packages/slate-react/test/generic-react-editor-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/provider-hooks-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/projections-and-selection-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/app-owned-customization.tsx
  • .tmp/slate-v2/packages/slate-react/test/surface-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/keyboard-input-strategy-contract.test.ts
  • .tmp/slate-v2/packages/slate-react/test/annotation-store-contract.test.tsx
  • .tmp/slate-v2/packages/slate-react/test/widget-layer-contract.test.tsx
  • .tmp/slate-v2/docs/libraries/slate-react/editable.md
  • .tmp/slate-v2/docs/libraries/slate-react/hooks.md
  • .tmp/slate-v2/docs/libraries/slate-react/slate.md
  • .tmp/slate-v2/packages/slate-react/test/editing-kernel-contract.ts
  • .tmp/slate-v2/packages/slate-react/test/editing-epoch-kernel-contract.ts
  • .tmp/slate-v2/packages/slate-react/test/selection-runtime-contract.test.ts
  • .tmp/slate-v2/packages/slate-react/test/model-input-strategy-contract.test.ts
  • .tmp/slate-v2/packages/slate-react/test/rendering-strategy-and-scroll.test.tsx
  • .tmp/slate-v2/playwright/integration/examples/richtext.test.ts
  • .tmp/slate-v2/playwright/integration/examples/placeholder.test.ts
  • .tmp/slate-v2/playwright/integration/examples/inlines.test.ts
  • .tmp/slate-v2/playwright/integration/examples/mentions.test.ts
  • .tmp/slate-v2/playwright/integration/examples/highlighted-text.test.ts
  • .tmp/slate-v2/playwright/integration/examples/markdown-shortcuts.test.ts
  • .tmp/slate-v2/scripts/benchmarks/browser/react/rerender-breadth.tsx
  • .tmp/slate-v2/scripts/benchmarks/browser/react/huge-document-overlays.tsx

6.1 React Editor Initialization And Value API

Affected:

  • .tmp/slate-v2/packages/slate/src/create-editor.ts
  • .tmp/slate-v2/packages/slate/src/core/public-state.ts
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-slate-editor.ts
  • .tmp/slate-v2/packages/slate-react/src/components/slate.tsx
  • .tmp/slate-v2/site/examples/ts/**
  • docs/plans/2026-05-04-slate-v2-react-editor-initialization-value-ralplan.md

Accepted current shape:

  • createEditor({ initialValue, initialSelection }) seeds public editor state synchronously before React provider render.
  • useSlateEditor({ initialValue, extensions }) is the React helper for creation-time extension composition.
  • A direct createReactEditor({ initialValue, extensions }) constructor can support tests and non-hook React setup without introducing a second composition model.
  • <Slate editor={editor}> provides context, subscriptions, decoration sources, one annotation store, and callbacks. It does not initialize document content.
  • Mounted document replacement is explicit through editor.update((tx) => tx.value.replace({ children, selection })).
  • Invalid empty initialValue: [] fails with a clear core error instead of booting a broken editor.

Why it belongs in the PR:

  • Initialization belongs to editor creation, not provider render mutation.
  • Projection, annotation, and external-store code can read initialized snapshots before provider render.
  • The React provider is a runtime adapter over an initialized editor, not the owner of editor value truth.

Issue coverage:

  • Fixed in Section 0: #6013, #5605, and #5709.
  • Improved in the matrix: #5710, #4564, #5488, and #5351.
  • Does not claim #3465; full-document normalization/default-root policy remains separate from initialization ergonomics.

Proof references:

  • docs/plans/2026-05-04-slate-v2-react-editor-initialization-value-ralplan.md
  • docs/slate-v2/ledgers/issue-coverage-matrix.md
  • .tmp/slate-v2/packages/slate/test/state-tx-public-api-contract.ts
  • .tmp/slate-v2/packages/slate-react/test/provider-hooks-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/surface-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/generic-react-editor-contract.tsx

6.2 React Editable Input Rule Ownership

Affected:

  • .tmp/slate-v2/packages/slate/src/core/editor-extension.ts
  • .tmp/slate-v2/packages/slate/src/core/transform-middleware.ts
  • .tmp/slate-v2/packages/slate/src/create-editor.ts
  • .tmp/slate-v2/packages/slate/src/interfaces/editor.ts
  • .tmp/slate-v2/packages/slate/test/extension-methods-contract.ts
  • .tmp/slate-v2/packages/slate/test/generic-extension-namespace-contract.ts
  • .tmp/slate-v2/packages/slate-react/src/editable/editable-input-rules.ts
  • .tmp/slate-v2/packages/slate-react/src/editable/runtime-root-engine.ts
  • .tmp/slate-v2/packages/slate-react/src/index.ts
  • .tmp/slate-v2/packages/slate-react/src/components/editable.tsx
  • .tmp/slate-v2/packages/slate-react/src/components/editable-text-blocks.tsx
  • .tmp/slate-v2/site/examples/ts/check-lists.tsx
  • .tmp/slate-v2/site/examples/ts/markdown-shortcuts.tsx
  • .tmp/slate-v2/site/examples/ts/inlines.tsx
  • docs/plans/2026-05-04-slate-v2-legacy-example-dx-ralplan.md
  • docs/plans/2026-05-13-slate-v2-editable-input-rule-ownership-ralplan.md

Current implemented shape:

  • slate extension registration accepts transform middleware for every public mutating editor transform in EditorTransformApi except engine controls.
  • Covered transform families: marks, text/delete/fragment/break insertion, node transforms, and selection transforms.
  • Explicitly excluded from transform middleware: bookmark, normalize, setNormalizing, and withoutNormalizing.
  • Transform middleware runs through keyed internal command registration and defaults through the transform registry without exposing public command slots.
  • next() forwards current args unchanged, and next(overrides) shallow-merges explicit overrides such as next({ text: normalizedText }).
  • Handling is expressed by not calling next(), matching Slate's old withX(editor) override feel without monkeypatching editor methods.
  • Internal default forwarding skips nested public transform middleware so aliases like deleteBackward -> delete do not double-fire extension hooks.
  • Slate React does not expose EditableInputRule*, editableInputRules(...), EDITABLE_INPUT_RULE_CAPABILITY, or an Editable inputRules prop.
  • Keep onDOMBeforeInput as the public raw native escape hatch. Public onCommand / EditableCommand* is cut; native-format behavior that Slate owns stays internal/runtime-owned and covered by focused contracts.
  • Checklist Backspace uses transforms.deleteBackward(...).
  • Markdown typed shortcuts and inline URL typed insertion use transforms.insertText(...) where the behavior is model-owned.
  • Direct command registry helpers stay out of the primary public package; command middleware is substrate, while public examples teach transform middleware.
  • Keep rich semantic input-rule families in Plate, not raw Slate.
  • Public extension commands fields remain rejected; direct Editor.registerCommand(...) stays the low-level substrate and advanced escape hatch, while normal examples teach transform middleware.

Accepted current source shape:

  • Transform middleware covers writes only. It is not the full no-regression answer for old overrideable editor methods.
  • Grouped extension.queries covers accepted pure read methods across fragment, marks, nodes, points, ranges, and text, including static/read parity for the pure read keys that do not naturally fit the previous grouped state view: nodes.path, nodes.elementReadOnly, nodes.shouldMergeNodesRemovePrevNode, and points.positions.
  • Query middleware is keyed by group/method, supports next(overrides), preserves generator reads during default delegation, rejects double next(), and prevents editor.update from starting inside query middleware.
  • normalizers.editor is the typed ordered middleware lane for editor-root and value-level normalization.
  • normalizers.node is the typed ordered middleware lane for non-root node normalization, with next(overrides), built-in fallback delegation, cleanup, extension-local registration ids, scoped normalizer tx, and double-next proof.
  • Scoped normalizer tx exposes model repair APIs and value.get(), but not recursive normalization controls, operation replay, or whole-value replacement.
  • Operation and commit extension slots answer old apply and onChange pressure. The accepted author-facing naming target is operations.apply for operation-level hooks, onCommit for post-transaction observers, and setup for extension-local runtime installation.
  • Refs, raw snapshots, runtime ids, lifecycle controls, and engine controls stay out of extension override middleware.
  • Proof source: docs/plans/2026-05-13-slate-v2-editable-input-rule-ownership-ralplan.md Section Full Editor Method Override Coverage Ralplan - 2026-05-16.

Why it belongs in the PR:

  • The examples should teach first-class editor behavior composition instead of copying per-component keydown branches.
  • Model behavior should not be authored through browser inputType strings.
  • The core command registry already routes delete and insert-text commands through deterministic middleware, which covers DOM, keyboard fallback, and programmatic command paths better than a React beforeinput rule registry.
  • Transform middleware gives that same one-path runtime proof while preserving the Slate-close withX(editor) override feel for public examples.
  • The next() contract keeps the common case tiny while still allowing middleware to normalize args before delegating.

Not claimed:

  • A full extension keyboard shortcut system.
  • A replacement for every app-owned onKeyDown escape hatch.
  • Legacy command-slot compatibility.
  • Legacy method-slot monkeypatch compatibility. The claim is v2 capability parity through first-class extension surfaces, not restoring mutable editor method fields.
  • A new fixed or improved issue claim for the adjacent input-runtime issues or #3557; the insert-node/fragment extension pressure is related proof, not an exact upstream repro closure.

Proof references:

  • .tmp/slate-v2/packages/slate/src/core/editor-extension.ts
  • .tmp/slate-v2/packages/slate/src/core/transform-middleware.ts
  • .tmp/slate-v2/packages/slate/src/core/query-middleware.ts
  • .tmp/slate-v2/packages/slate/src/core/normalize-node.ts
  • .tmp/slate-v2/packages/slate/src/create-editor.ts
  • .tmp/slate-v2/packages/slate/src/interfaces/editor.ts
  • .tmp/slate-v2/packages/slate/src/core/command-registry.ts
  • .tmp/slate-v2/packages/slate/src/editor/delete-backward.ts
  • .tmp/slate-v2/packages/slate/test/query-extension-contract.ts
  • .tmp/slate-v2/packages/slate/test/normalization-contract.ts
  • .tmp/slate-v2/packages/slate/test/apply-onchange-hard-cut-contract.ts
  • .tmp/slate-v2/packages/slate/test/extension-methods-contract.ts
  • .tmp/slate-v2/packages/slate/test/generic-extension-namespace-contract.ts
  • .tmp/slate-v2/packages/slate/test/transaction-contract.ts
  • .tmp/slate-v2/packages/slate/test/transforms-contract.ts
  • .tmp/slate-v2/packages/slate/test/public-surface-contract.ts
  • .tmp/slate-v2/site/examples/ts/forced-layout.tsx
  • .tmp/slate-v2/scripts/benchmarks/core/compare/normalization.mjs
  • .tmp/slate-v2/packages/slate-react/src/components/editable.tsx
  • .tmp/slate-v2/packages/slate-react/src/editable/runtime-root-engine.ts
  • .tmp/slate-v2/site/examples/ts/check-lists.tsx
  • .tmp/slate-v2/site/examples/ts/markdown-shortcuts.tsx
  • .tmp/slate-v2/site/examples/ts/inlines.tsx
  • bun check in .tmp/slate-v2
  • PLAYWRIGHT_RETRIES=0 PLAYWRIGHT_WORKERS=1 bun x playwright test playwright/integration/examples/forced-layout.test.ts --project=chromium
  • PLAYWRIGHT_RETRIES=0 PLAYWRIGHT_WORKERS=1 bun x playwright test playwright/integration/examples/check-lists.test.ts playwright/integration/examples/markdown-shortcuts.test.ts playwright/integration/examples/inlines.test.ts --project=chromium
  • docs/plans/2026-05-13-slate-v2-editable-input-rule-ownership-ralplan.md

6.2.1 React Editable Native Input Boundary

Affected:

  • .tmp/slate-v2/packages/slate-react/src/components/editable.tsx
  • .tmp/slate-v2/packages/slate-react/src/editable/editable-key-commands.ts
  • .tmp/slate-v2/packages/slate-react/src/editable/keyboard-input-strategy.ts
  • .tmp/slate-v2/packages/slate-react/src/editable/runtime-before-input-events.ts
  • .tmp/slate-v2/packages/slate-react/src/editable/input-router.ts
  • .tmp/slate-v2/site/examples/ts/code-highlighting.tsx
  • .tmp/slate-v2/site/examples/ts/iframe.tsx
  • .tmp/slate-v2/site/examples/ts/images.tsx
  • .tmp/slate-v2/site/examples/ts/markdown-shortcuts.tsx
  • .tmp/slate-v2/site/examples/ts/richtext.tsx
  • .tmp/slate-v2/site/examples/ts/tables.tsx
  • .tmp/slate-v2/site/examples/ts/hovering-toolbar.tsx
  • .tmp/slate-v2/docs/libraries/slate-react/editable.md
  • docs/plans/2026-05-14-slate-v2-callback-memoization-dx-ralplan.md

Accepted current shape:

  • onDOMBeforeInput is the raw native InputEvent escape hatch and receives Slate context.
  • Public onCommand and EditableCommand* are no longer accepted raw Slate app DX. They crossed into product command language.
  • Native-format behavior that Slate owns remains internal runtime behavior after the public prop/types removal.
  • Raw Slate examples use Editable onKeyDown for UI hotkeys and transforms.* middleware for reusable model behavior.
  • Table Backspace/Delete/Enter, markdown Enter/Backspace, and richtext exit-on-Enter are model transform behavior, not UI shortcut behavior.
  • Plate owns product shortcut/keymap composition.
  • Native input listeners attach to the root once and read the latest handler props without requiring user useMemo or useCallback.
  • Slate reports format commands but does not hard-code a mark schema.

Why it belongs in the PR:

  • Formatting examples should not teach browser inputType parsing as normal editor behavior, but raw Slate also should not expose product command unions as public app API.
  • The React runtime already owns native input classification and DOM repair, so native-format handling can stay internal while public apps use raw onDOMBeforeInput only when they need a low-level escape hatch.

Not claimed:

  • A general plugin command registry.
  • A replacement for app-owned overlay/cursor key handlers.
  • Exact closure for legacy onDOMBeforeInput paste behavior.
  • Exact closure for the historical DOMPoint crash reports without their original repro proof.

Proof references:

  • .tmp/slate-v2/packages/slate-react/test/editing-kernel-contract.ts
  • .tmp/slate-v2/packages/slate-react/test/editable-behavior.tsx
  • .tmp/slate-v2/packages/slate-react/test/input-router-contract.test.tsx
  • .tmp/slate-v2/packages/slate-react/test/keyboard-input-strategy-contract.test.ts
  • .tmp/slate-v2/packages/slate-react/test/surface-contract.tsx
  • .tmp/slate-v2/playwright/integration/examples/hovering-toolbar.test.ts
  • docs/slate-v2/ledgers/issue-coverage-matrix.md
  • docs/plans/2026-05-18-slate-v2-table-transform-boundary-ralplan.md

6.2.2 Core Boolean Mark Key Type Helper

Affected:

  • .tmp/slate-v2/packages/slate/src/interfaces/text.ts
  • .tmp/slate-v2/packages/slate/src/index.ts
  • .tmp/slate-v2/packages/slate/test/generic-value-contract.ts
  • .tmp/slate-v2/site/examples/ts/custom-types.d.ts
  • .tmp/slate-v2/site/examples/ts/mark-utils.ts
  • .tmp/slate-v2/site/examples/ts/richtext.tsx
  • .tmp/slate-v2/site/examples/ts/hovering-toolbar.tsx
  • .tmp/slate-v2/site/examples/ts/iframe.tsx
  • docs/plans/2026-05-16-slate-v2-boolean-mark-key-type-helper-ralplan.md

Accepted shape:

  • slate should export type-only BooleanMarkKeysOf<N> and BooleanMarksOf<N> helpers derived from existing MarksOf<N>.
  • Examples should replace local mapped conditional types such as BooleanTextKey<T> with BooleanMarkKeysOf<CustomText>.
  • Boolean mark helpers should exclude non-boolean mark attributes like fontSize?: string.
  • MarkKeysOf<N> keeps its existing optional-mark fallback behavior; this is an additive helper, not a semantic rewrite.

Why it belongs in the PR:

  • Public examples should teach Slate mark typing, not copied TypeScript conditional/mapped-type machinery.
  • The helper names a raw Slate concept and stays type-only, so it does not turn core into a toolbar, hotkey, or Plate plugin API.

Not claimed:

  • No runtime mark behavior change.
  • No browser-formatting behavior change.
  • No fixed issue claim for #5075 until exact TypeScript repro proof exists. The current claim is Improves #5075.

Proof references:

  • .tmp/slate-v2/packages/slate/src/interfaces/text.ts
  • .tmp/slate-v2/packages/slate/test/generic-value-contract.ts
  • .tmp/slate-v2/site/examples/ts/custom-types.d.ts
  • .tmp/slate-v2/site/examples/ts/mark-utils.ts
  • docs/plans/2026-05-16-slate-v2-boolean-mark-key-type-helper-ralplan.md

6.3 React Decoration Source Hook

Affected:

  • .tmp/slate-v2/packages/slate/src/interfaces/node.ts
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-slate-decoration-source.ts
  • .tmp/slate-v2/packages/slate-react/src/decoration-source.ts
  • .tmp/slate-v2/site/examples/ts/code-highlighting.tsx
  • .tmp/slate-v2/site/examples/ts/search-highlighting.tsx
  • .tmp/slate-v2/site/examples/ts/markdown-preview.tsx
  • .tmp/slate-v2/site/examples/ts/highlighted-text.tsx
  • .tmp/slate-v2/site/examples/ts/external-decoration-sources.tsx
  • .tmp/slate-v2/site/examples/ts/rendering-strategy-runtime.tsx
  • docs/plans/2026-05-04-slate-v2-legacy-example-dx-ralplan.md
  • docs/plans/2026-05-18-slate-v2-search-highlighting-dx-ralplan.md

Accepted current shape:

  • createDecorationSource(editor, options) remains the low-level projection source API.
  • useSlateDecorationSource(editor, options) owns React lifecycle cleanup for common example and app code.
  • The hook keeps the source stable for an editor while reading the latest read and runtimeScope callbacks.
  • The hook accepts deps?: readonly unknown[] so external query/state changes refresh the source without recreating it or teaching memoized option objects in examples.
  • dirtiness and runtimeScope remain visible in the call site because they are the performance contract.
  • Structurally identical dirtiness class lists keep the same hook source identity, so multi-class sources can inline dirtiness: ['text', 'node'] without caller-side tuple constants.
  • NodeApi.findTextRanges(root, query, options) is the accepted raw Slate helper for turning text matches into Range[]. It is not a search feature: first-tranche options stay thin with caseSensitive plus RegExp or matcher callbacks, no wholeWord, no locale policy, and no public across: 'text-siblings' option.
  • createRangeDecorationSource(editor, options) is the accepted helper over createDecorationSource for callers that already have ranges or range entries and do not need to hand-build projection objects, keys, or refresh defaults.
  • useSlateRangeDecorationSource(editor, options) is the React helper for range-based decorations. It shares the low-level hook's lifecycle cleanup and deps refresh contract without recreating the source object.
  • createDecorationSource and useSlateDecorationSource remain the power APIs for external stores, custom invalidation, manual runtimeScope, and metrics.
  • The huge-overlay benchmark uses useEditorSelector plus decorationSources; no useSlateSelector alias or direct <Slate projectionStore={...}> prop is required.

Why it belongs in the PR:

  • Decoration examples should teach the projection model, not repeated useMemo plus cleanup useEffect ceremony.
  • Search, hashtag, markdown-preview, code-token, lint, and diagnostics examples should use generic range/source helpers when the repeated work is range-to-projection plumbing.
  • Source lifecycle belongs behind a hook when the source is created inside a React component.
  • Raw Slate should not grow editor.api.search, SearchApi, or product search options to satisfy a search-highlighting example.

Current proof:

  • bun run bench:react:huge-document-overlays:local passes in .tmp/slate-v2.
  • Benchmark green does not claim browser/native closure; selection, IME, copy, paste, find, and mobile rows remain separate gates.
  • Range-source helper proof still requires parity against the manual source path: sourceReadCount, recomputeCount, fullFallbackCount, changedRuntimeBucketCount, runtimeSubscriberWakeCount, and globalSubscriberWakeCount must not regress.
  • #4076 stays a docs/example non-claim. It supports simplifying the example and rejecting product-shaped search API in raw Slate; it is not a fixed or improved issue claim.

Proof references:

  • .tmp/slate-v2/packages/slate-react/test/app-owned-customization.tsx
  • .tmp/slate-v2/packages/slate-react/test/projections-and-selection-contract.tsx
  • .tmp/slate-v2/scripts/benchmarks/browser/react/huge-document-overlays.tsx
  • .tmp/slate-v2/scripts/benchmarks/browser/react/rerender-breadth.tsx
  • .tmp/slate-v2/site/examples/ts/code-highlighting.tsx
  • .tmp/slate-v2/site/examples/ts/search-highlighting.tsx
  • .tmp/slate-v2/site/examples/ts/markdown-preview.tsx
  • .tmp/slate-v2/site/examples/ts/highlighted-text.tsx
  • .tmp/slate-v2/site/examples/ts/external-decoration-sources.tsx
  • .tmp/slate-v2/site/examples/ts/rendering-strategy-runtime.tsx
  • docs/plans/2026-05-04-slate-v2-legacy-example-dx-ralplan.md
  • docs/plans/2026-05-18-slate-v2-search-highlighting-dx-ralplan.md

6.4 React Annotation Store Context

Affected:

  • .tmp/slate-v2/packages/slate-react/src/components/slate.tsx
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-slate-annotations.tsx
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-slate-annotation-store.tsx
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-slate-widget-store.tsx
  • .tmp/slate-v2/packages/slate-react/test/annotation-store-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/widget-layer-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/surface-contract.tsx
  • .tmp/slate-v2/docs/libraries/slate-react/annotations.md
  • .tmp/slate-v2/docs/libraries/slate-react/hooks.md
  • .tmp/slate-v2/site/examples/ts/collaborative-comments.tsx
  • .tmp/slate-v2/site/examples/ts/review-comments.tsx
  • .tmp/slate-v2/site/examples/ts/persistent-annotation-anchors.tsx
  • docs/plans/2026-05-04-slate-v2-legacy-example-dx-ralplan.md

Accepted current shape:

  • <Slate annotationStore={store}> is singular because one annotation store already owns many annotations.
  • useSlateAnnotations() and useSlateAnnotation(id) read the provider store by default.
  • Both hooks still accept an explicit store for cross-editor or out-of-tree annotation UI.
  • Annotation projection remains provider-owned so inline segments, widgets, and sidebars read the same committed annotation state.
  • Raw Slate owns the anchor/projection substrate only. Review comments, suggestions, permissions, and collaboration services stay product-layer work.
  • useSlateAnnotationStore and useSlateWidgetStore accept projector options with explicit deps so examples can map product data without caller-side useMemo arrays.

Why it belongs in the PR:

  • Examples should not pass the same store through <Slate> and component props just to list annotations.
  • Singular naming matches the actual data model and avoids teaching users that multiple stores are the common case.

Proof references:

  • .tmp/slate-v2/packages/slate-react/test/annotation-store-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/widget-layer-contract.tsx
  • .tmp/slate-v2/site/examples/ts/collaborative-comments.tsx
  • .tmp/slate-v2/site/examples/ts/review-comments.tsx
  • .tmp/slate-v2/site/examples/ts/persistent-annotation-anchors.tsx
  • docs/plans/2026-05-04-slate-v2-legacy-example-dx-ralplan.md

6.4.1 React Editable Renderer Registration

Affected:

  • .tmp/slate-v2/packages/slate-react/src/editable/editable-renderers.ts
  • .tmp/slate-v2/packages/slate-react/src/components/editable-text-blocks.tsx
  • .tmp/slate-v2/packages/slate-react/src/index.ts
  • .tmp/slate-v2/docs/concepts/09-rendering.md
  • .tmp/slate-v2/docs/libraries/slate-react/editable.md
  • .tmp/slate-v2/docs/walkthroughs/03-defining-custom-elements.md
  • .tmp/slate-v2/docs/walkthroughs/04-applying-custom-formatting.md
  • .tmp/slate-v2/docs/walkthroughs/05-executing-commands.md
  • .tmp/slate-v2/docs/walkthroughs/09-performance.md

Accepted current shape:

  • Raw Slate should not own a renderer registry. Public editableRenderers(...) and any planned editable.renderers facet are hard cuts.
  • Raw Editable render props are the Slate React rendering API.
  • Beginner docs teach module-level or editor-creation-stable render callbacks, not useCallback cargo cult and not raw Slate renderer registries.
  • Core slate stays non-React; renderer registration belongs to slate-react.

Not claimed:

  • A raw Slate renderer registry.
  • A core EditorElementSpec React renderer field.
  • Exact closure for selection-event callback churn reports without their original browser repro.

Proof references:

  • .tmp/slate-v2/packages/slate-react/test/surface-contract.test.tsx
  • .tmp/slate-v2/packages/slate-react/src/editable/editable-renderers.ts
  • .tmp/slate-v2/packages/slate-react/src/components/editable-text-blocks.tsx
  • docs/plans/2026-05-14-slate-v2-example-memoization-hard-cut-ralplan.md

6.5 Render Path Props

Affected:

  • .tmp/slate-v2/packages/slate-dom/src/plugin/dom-editor.ts
  • .tmp/slate-v2/packages/slate-dom/src/utils/weak-maps.ts
  • .tmp/slate-v2/packages/slate-react/src/components/editable-text-blocks.tsx
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-element-path.ts
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-element-selected.ts
  • .tmp/slate-v2/packages/slate-react/src/hooks/use-slate-node-ref.tsx
  • .tmp/slate-v2/packages/slate-react/test/surface-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/provider-hooks-contract.tsx
  • .tmp/slate-v2/packages/slate-dom/test/bridge.ts
  • .tmp/slate-v2/site/examples/ts/images.tsx
  • .tmp/slate-v2/site/examples/ts/embeds.tsx
  • .tmp/slate-v2/site/examples/ts/check-lists.tsx
  • .tmp/slate-v2/site/examples/ts/paste-html.tsx
  • .tmp/slate-v2/site/examples/ts/mentions.tsx
  • .tmp/slate-v2/docs/libraries/slate-react/editable.md
  • .tmp/slate-v2/docs/libraries/slate-react/hooks.md
  • docs/plans/2026-05-12-slate-v2-render-path-prop-performance-ralplan.md

Accepted current shape:

  • RenderElementProps receives attributes, children, element, isInline, and slots; it does not expose eager path or index.
  • RenderVoidProps receives { element }; it does not expose eager path.
  • Event handlers resolve the current location with editor.api.dom.findPath(element).
  • The installed DOM extension handle resolves by runtime id before stale weak-map indexes.
  • useElementPath() is the opt-in render-time path subscription.
  • useElementSelected() keeps intersection semantics; block voids that only want selected UI for a collapsed caret use useElementSelected({ mode: 'collapsed' }).
  • Explicit watched paths use useElementSelected({ at: path }); there is no positional path overload.
  • No temporary target, path, or index compat alias is kept for v2 render props.

Why it belongs in the PR:

  • Public render props must not force sibling-wide rerenders after leading inserts just to keep tree-address props fresh.
  • Path is current location metadata, not mounted-node identity.
  • The default renderer surface stays small while path-dependent UI can opt into a targeted subscription.

Proof references:

  • .tmp/slate-v2/packages/slate-react/test/surface-contract.tsx
  • .tmp/slate-v2/packages/slate-react/test/use-element-selected.test.tsx
  • .tmp/slate-v2/packages/slate-react/test/provider-hooks-contract.tsx
  • .tmp/slate-v2/packages/slate-dom/test/bridge.ts
  • .tmp/slate-v2/site/examples/ts/images.tsx
  • .tmp/slate-v2/site/examples/ts/embeds.tsx
  • .tmp/slate-v2/site/examples/ts/check-lists.tsx
  • .tmp/slate-v2/site/examples/ts/paste-html.tsx
  • docs/plans/2026-05-12-slate-v2-render-path-prop-performance-ralplan.md

7. DOM Coverage Boundaries

Affected:

  • .tmp/slate-v2/packages/slate-dom/src/plugin/dom-coverage.ts
  • .tmp/slate-v2/packages/slate-dom/src/plugin/dom-clipboard-runtime.ts
  • .tmp/slate-v2/packages/slate-react/src/dom-coverage-boundary.tsx
  • .tmp/slate-v2/site/examples/ts/dom-coverage-boundaries.tsx
  • docs/plans/2026-05-02-slate-v2-hidden-subtree-first-class-ralplan.md

Accepted current shape:

  • The primitive is DOM coverage for model-present content, not product-level "hidden subtree" UI.
  • Raw renderers cannot omit editable descendants and expect Slate to guess.
  • Omitted DOM must be represented by a Slate-owned coverage boundary.
  • Selection, copy, paste, and materialization consult the shared boundary registry.
  • The public authoring API is still unstable. HiddenRange and HiddenSelf naming are rejected.

Why it belongs in the PR:

  • This is the missing-DOM substrate needed for collapse, staged mounting, app-owned preview surfaces, and virtualization.
  • It prevents the old Cannot resolve a Slate node from DOM node failure class from becoming a permanent v2 footgun.

Not claimed:

  • Stable slots.Boundary.
  • Stable self-boundary API.
  • Native browser find over unmounted content.
  • Production-ready virtualization semantics.

Proof references:

  • docs/plans/2026-05-02-slate-v2-hidden-subtree-first-class-ralplan.md
  • docs/plans/2026-05-03-slate-v2-dom-present-large-doc-phase-6-plan.md
  • docs/slate-v2/references/chunking-review.md

8. Large Document Rendering Strategy

Affected:

  • .tmp/slate-v2/packages/slate-react/src/rendering-strategy/**
  • .tmp/slate-v2/site/examples/ts/huge-document.tsx
  • .tmp/slate-v2/site/examples/ts/rendering-strategy-runtime.tsx
  • .tmp/slate-v2/site/examples/ts/rendering-strategy-virtualized.tsx
  • docs/plans/2026-05-03-slate-v2-dom-present-large-doc-phase-6-plan.md
  • docs/plans/2026-05-03-slate-v2-experimental-virtualized-rendering-boundary.md

Accepted current shape:

  • Child-count chunking is dead as the default architecture.
  • The safe baseline is cheap DOM-present rendering with selector-first updates, semantic islands, and commit-scoped invalidation.
  • Staged large-document mounting uses DOM coverage for pending regions.
  • interactiveReady and nativeSurfaceComplete are separate concepts.
  • Full-document replacement must not leave stale far DOM exposed.
  • Virtualized rendering is explicit and experimental. The API exposes it only through object form, { type: 'virtualized' }; stable string strategies stay auto, full, and staged. Public shell / preview-shell is cut before beta; preview or collapse UI belongs above Slate and must use DOM coverage.
  • DOM strategy option objects normalize by primitive fields inside Editable, so examples do not need caller-side useMemo just to stabilize option identity.

Why it belongs in the PR:

  • Large-doc behavior is one of the main reasons to rewrite the runtime.
  • GitHub-scale lessons apply: make hot render units cheap first, then use virtualization only for the extreme tail with honest browser-behavior tradeoffs.

Open gates:

  • The 5000-block huge-document DOM-present/default gate is scoped as current release proof.
  • The 10000-block immediate far-selection stress row is not claimed as fixed.
  • Virtualized editing needs stricter caret, IME, mobile, copy, and find proof before production positioning.
  • The Pretext layout target hard-cuts public renderingStrategy to domStrategy before beta because the current name conflates layout, pagination, preview surfaces, and viewport virtualization. Any temporary alias is implementation-only and must not appear in public examples or docs.

Proof references:

  • docs/slate-v2/references/chunking-review.md
  • docs/plans/2026-05-03-slate-v2-dom-present-large-doc-phase-6-plan.md
  • docs/plans/2026-05-03-slate-v2-experimental-virtualized-rendering-boundary.md
  • docs/plans/2026-05-23-slate-v2-large-document-performance-virtualization-ralplan.md
  • docs/slate-v2/replacement-gates-scoreboard.md
  • .tmp/slate-v2/packages/slate-react/test/surface-contract.test.tsx
  • .tmp/slate-v2/site/examples/ts/rendering-strategy-runtime.tsx

9. Browser Regression And Example Proof

Affected:

  • .tmp/slate-v2/site/constants/examples.ts
  • .tmp/slate-v2/site/pages/examples/[example].tsx
  • .tmp/slate-v2/site/examples/**
  • .tmp/slate-v2/tests/integration/**

Accepted current shape:

  • Examples are proof surfaces, not demos bolted on after the runtime.
  • v2-only examples cover projected decorations, external decoration sources, persistent annotations, review comments, runtime rendering strategy, large docs, DOM coverage boundaries, and experimental virtualization.
  • Regression examples cover iframe DOM fallback and inline void mention navigation.
  • The virtualized example is visible as Experimental Virtualized Rendering.

Why it belongs in the PR:

  • Maintainers need a reviewable browser surface for architecture claims.
  • The PR body should point reviewers to examples that prove exact runtime behavior, especially around browser selection and DOM mapping.

Proof references:

  • docs/plans/2026-05-03-slate-v2-mentions-void-arrow-selection-regression.md
  • docs/plans/2026-05-03-slate-v2-experimental-virtualized-rendering-boundary.md
  • docs/slate-v2/replacement-gates-scoreboard.md

10. Release Gates Not Yet Claimed

Do not write the PR as release-ready until these are closed or explicitly scoped out:

  • Final same-turn integration/build/type/lint/perf closure.
  • Full bun test:integration-local closure.
  • RC ledger closure.
  • Completion-check status.
  • Huge-doc performance scope declaration: 5000-block default proof is in scope; 10000-block immediate far-selection stress is not claimed unless a later artifact closes it.
  • Raw-device mobile proof, unless the PR explicitly scopes mobile to semantic or Playwright-device proof.
  • Stable public DOM coverage slot API.
  • Production-ready virtualization.
  • Public docs/JSDoc pass for the React editor initialization API.
  • Remaining test fixture migration away from legacy static editor helpers.

Review rule:

  • Keep only drift with a concrete owner, a proof file, or a release gate.
  • Architecture rows outrank local compatibility when they conflict.
  • Same-path/source-close pressure is strongest for examples, docs, and public package surfaces.
  • If a row is not engine-forced and has no current value, keep it out of the PR.