[refactor] record migrations (#1430)

This PR removes comments from our record types, makes initial version optional, and unifies the order of initial / current version. - Initial versions are zero by default - If no current version is provided to `defineMigrations`, migrations should be undefined - Fixes TypeScript quirks in versioning (e.g. only initial version) This PR also: - Makes migrations optional when empty - Removes reference to empty migrations ### Change Type - [x] `major` — Breaking Change ### Test Plan - [x] Unit Tests - [ ] Webdriver tests ### Release Notes - [tlschema] Improve `defineMigrations` - [editor] Simplify migration definitions
2023-05-22 22:46:24 +01:00 · 2023-05-22 22:46:24 +01:00 · 53be923921
commit 53be923921
parent d48e403ed1
54 changed files with 427 additions and 691 deletions
--- a/.prettierignore
+++ b/.prettierignore
@ -13,3 +13,5 @@ apps/docs/content.json
 apps/vscode/extension/editor/index.js
 apps/vscode/extension/editor/tldraw-assets.json
 apps/webdriver/www/index.js
+apps/vscode/extension/editor/*
+apps/examples/www
--- a/packages/editor/src/lib/app/shapeutils/TLArrowUtil/TLArrowUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLArrowUtil/TLArrowUtil.tsx
@ -11,7 +11,7 @@ import {
 	VecLike,
 } from '@tldraw/primitives'
 import {
-	arrowShapeMigrations,
+	arrowShapeTypeMigrations,
 	arrowShapeTypeValidator,
 	TLArrowheadType,
 	TLArrowShape,
@ -1141,5 +1141,5 @@ export const TLArrowShapeDef = defineShape<TLArrowShape, TLArrowUtil>({
 	type: 'arrow',
 	getShapeUtil: () => TLArrowUtil,
 	validator: arrowShapeTypeValidator,
-	migrations: arrowShapeMigrations,
+	migrations: arrowShapeTypeMigrations,
 })
--- a/packages/editor/src/lib/app/shapeutils/TLBookmarkUtil/TLBookmarkUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLBookmarkUtil/TLBookmarkUtil.tsx
@ -1,6 +1,6 @@
 import { toDomPrecision } from '@tldraw/primitives'
 import {
-	bookmarkShapeMigrations,
+	bookmarkShapeTypeMigrations,
 	bookmarkShapeTypeValidator,
 	TLAsset,
 	TLAssetId,
@ -197,5 +197,5 @@ export const TLBookmarkShapeDef = defineShape<TLBookmarkShape, TLBookmarkUtil>({
 	type: 'bookmark',
 	getShapeUtil: () => TLBookmarkUtil,
 	validator: bookmarkShapeTypeValidator,
-	migrations: bookmarkShapeMigrations,
+	migrations: bookmarkShapeTypeMigrations,
 })
--- a/packages/editor/src/lib/app/shapeutils/TLDrawUtil/TLDrawUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLDrawUtil/TLDrawUtil.tsx
@ -10,7 +10,7 @@ import {
 	VecLike,
 } from '@tldraw/primitives'
 import {
-	drawShapeMigrations,
+	drawShapeTypeMigrations,
 	drawShapeTypeValidator,
 	TLDrawShape,
 	TLDrawShapeSegment,
@ -314,7 +314,7 @@ export class TLDrawUtil extends TLShapeUtil<TLDrawShape> {
 export const TLDrawShapeDef = defineShape<TLDrawShape, TLDrawUtil>({
 	type: 'draw',
 	getShapeUtil: () => TLDrawUtil,
-	migrations: drawShapeMigrations,
+	migrations: drawShapeTypeMigrations,
 	validator: drawShapeTypeValidator,
 })

--- a/packages/editor/src/lib/app/shapeutils/TLEmbedUtil/TLEmbedUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLEmbedUtil/TLEmbedUtil.tsx
@ -1,7 +1,7 @@
 /* eslint-disable react-hooks/rules-of-hooks */
 import { toDomPrecision } from '@tldraw/primitives'
 import {
-	embedShapeMigrations,
+	embedShapeTypeMigrations,
 	embedShapeTypeValidator,
 	TLEmbedShape,
 	tlEmbedShapePermissionDefaults,
@ -236,5 +236,5 @@ export const TLEmbedShapeDef = defineShape<TLEmbedShape, TLEmbedUtil>({
 	type: 'embed',
 	getShapeUtil: () => TLEmbedUtil,
 	validator: embedShapeTypeValidator,
-	migrations: embedShapeMigrations,
+	migrations: embedShapeTypeMigrations,
 })
--- a/packages/editor/src/lib/app/shapeutils/TLFrameUtil/TLFrameUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLFrameUtil/TLFrameUtil.tsx
@ -1,6 +1,5 @@
 import { canolicalizeRotation, SelectionEdge, toDomPrecision } from '@tldraw/primitives'
 import {
-	frameShapeMigrations,
 	frameShapeTypeValidator,
 	TLFrameShape,
 	TLShape,
@ -218,5 +217,4 @@ export const TLFrameShapeDef = defineShape<TLFrameShape, TLFrameUtil>({
 	type: 'frame',
 	getShapeUtil: () => TLFrameUtil,
 	validator: frameShapeTypeValidator,
-	migrations: frameShapeMigrations,
 })
--- a/packages/editor/src/lib/app/shapeutils/TLGeoUtil/TLGeoUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLGeoUtil/TLGeoUtil.tsx
@ -13,7 +13,7 @@ import {
 	VecLike,
 } from '@tldraw/primitives'
 import {
-	geoShapeMigrations,
+	geoShapeTypeMigrations,
 	geoShapeTypeValidator,
 	TLDashType,
 	TLGeoShape,
@ -1008,5 +1008,5 @@ export const TLGeoShapeDef = defineShape<TLGeoShape, TLGeoUtil>({
 	type: 'geo',
 	getShapeUtil: () => TLGeoUtil,
 	validator: geoShapeTypeValidator,
-	migrations: geoShapeMigrations,
+	migrations: geoShapeTypeMigrations,
 })
--- a/packages/editor/src/lib/app/shapeutils/TLGroupUtil/TLGroupUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLGroupUtil/TLGroupUtil.tsx
@ -1,10 +1,5 @@
 import { Box2d, Matrix2d } from '@tldraw/primitives'
-import {
-	TLGroupShape,
-	Vec2dModel,
-	groupShapeMigrations,
-	groupShapeTypeValidator,
-} from '@tldraw/tlschema'
+import { TLGroupShape, Vec2dModel, groupShapeTypeValidator } from '@tldraw/tlschema'
 import { SVGContainer } from '../../../components/SVGContainer'
 import { defineShape } from '../../../config/TLShapeDefinition'
 import { OnChildrenChangeHandler, TLShapeUtil } from '../TLShapeUtil'
@ -115,5 +110,4 @@ export const TLGroupShapeDef = defineShape<TLGroupShape, TLGroupUtil>({
 	type: 'group',
 	getShapeUtil: () => TLGroupUtil,
 	validator: groupShapeTypeValidator,
-	migrations: groupShapeMigrations,
 })
--- a/packages/editor/src/lib/app/shapeutils/TLImageUtil/TLImageUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLImageUtil/TLImageUtil.tsx
@ -3,7 +3,7 @@ import { Vec2d, toDomPrecision } from '@tldraw/primitives'
 import {
 	TLImageShape,
 	TLShapePartial,
-	imageShapeMigrations,
+	imageShapeTypeMigrations,
 	imageShapeTypeValidator,
 } from '@tldraw/tlschema'
 import { deepCopy } from '@tldraw/utils'
@ -275,7 +275,7 @@ export const TLImageShapeDef = defineShape<TLImageShape, TLImageUtil>({
 	type: 'image',
 	getShapeUtil: () => TLImageUtil,
 	validator: imageShapeTypeValidator,
-	migrations: imageShapeMigrations,
+	migrations: imageShapeTypeMigrations,
 })

 /**
--- a/packages/editor/src/lib/app/shapeutils/TLLineUtil/TLLineUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLLineUtil/TLLineUtil.tsx
@ -9,12 +9,7 @@ import {
 	intersectLineSegmentPolyline,
 	pointNearToPolyline,
 } from '@tldraw/primitives'
-import {
-	TLHandle,
-	TLLineShape,
-	lineShapeMigrations,
-	lineShapeTypeValidator,
-} from '@tldraw/tlschema'
+import { TLHandle, TLLineShape, lineShapeTypeValidator } from '@tldraw/tlschema'
 import { deepCopy } from '@tldraw/utils'
 import { SVGContainer } from '../../../components/SVGContainer'
 import { defineShape } from '../../../config/TLShapeDefinition'
@ -345,7 +340,6 @@ export const TLLineShapeDef = defineShape<TLLineShape, TLLineUtil>({
 	type: 'line',
 	getShapeUtil: () => TLLineUtil,
 	validator: lineShapeTypeValidator,
-	migrations: lineShapeMigrations,
 })

 /** @public */
--- a/packages/editor/src/lib/app/shapeutils/TLNoteUtil/TLNoteUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLNoteUtil/TLNoteUtil.tsx
@ -1,5 +1,5 @@
 import { Box2d, toDomPrecision, Vec2d } from '@tldraw/primitives'
-import { noteShapeMigrations, noteShapeTypeValidator, TLNoteShape } from '@tldraw/tlschema'
+import { noteShapeTypeMigrations, noteShapeTypeValidator, TLNoteShape } from '@tldraw/tlschema'
 import { defineShape } from '../../../config/TLShapeDefinition'
 import { FONT_FAMILIES, LABEL_FONT_SIZES, TEXT_PROPS } from '../../../constants'
 import { App } from '../../App'
@ -202,7 +202,7 @@ export const TLNoteShapeDef = defineShape<TLNoteShape, TLNoteUtil>({
 	getShapeUtil: () => TLNoteUtil,
 	type: 'note',
 	validator: noteShapeTypeValidator,
-	migrations: noteShapeMigrations,
+	migrations: noteShapeTypeMigrations,
 })

 function getGrowY(app: App, shape: TLNoteShape, prevGrowY = 0) {
--- a/packages/editor/src/lib/app/shapeutils/TLTextUtil/TLTextUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLTextUtil/TLTextUtil.tsx
@ -1,6 +1,6 @@
 /* eslint-disable react-hooks/rules-of-hooks */
 import { Box2d, toDomPrecision, Vec2d } from '@tldraw/primitives'
-import { textShapeMigrations, textShapeTypeValidator, TLTextShape } from '@tldraw/tlschema'
+import { textShapeTypeMigrations, textShapeTypeValidator, TLTextShape } from '@tldraw/tlschema'
 import { HTMLContainer } from '../../../components/HTMLContainer'
 import { defineShape } from '../../../config/TLShapeDefinition'
 import { FONT_FAMILIES, FONT_SIZES, TEXT_PROPS } from '../../../constants'
@ -374,7 +374,7 @@ export const TLTextShapeDef = defineShape<TLTextShape, TLTextUtil>({
 	type: 'text',
 	getShapeUtil: () => TLTextUtil,
 	validator: textShapeTypeValidator,
-	migrations: textShapeMigrations,
+	migrations: textShapeTypeMigrations,
 })

 function getTextSize(app: App, props: TLTextShape['props']) {
--- a/packages/editor/src/lib/app/shapeutils/TLVideoUtil/TLVideoUtil.tsx
+++ b/packages/editor/src/lib/app/shapeutils/TLVideoUtil/TLVideoUtil.tsx
@ -1,5 +1,5 @@
 import { toDomPrecision } from '@tldraw/primitives'
-import { TLVideoShape, videoShapeMigrations, videoShapeTypeValidator } from '@tldraw/tlschema'
+import { TLVideoShape, videoShapeTypeMigrations, videoShapeTypeValidator } from '@tldraw/tlschema'
 import * as React from 'react'
 import { track } from 'signia-react'
 import { HTMLContainer } from '../../../components/HTMLContainer'
@ -54,7 +54,7 @@ export const TLVideoShapeDef = defineShape<TLVideoShape, TLVideoUtil>({
 	type: 'video',
 	getShapeUtil: () => TLVideoUtil,
 	validator: videoShapeTypeValidator,
-	migrations: videoShapeMigrations,
+	migrations: videoShapeTypeMigrations,
 })

 // Function from v1, could be improved bu explicitly using this.model.time (?)
--- a/packages/editor/src/lib/test/tools/translating.test.ts
+++ b/packages/editor/src/lib/test/tools/translating.test.ts
@ -45,7 +45,7 @@ const __TopLeftSnapOnlyShapeDef = defineShape<__TopLeftSnapOnlyShape, __TopLeftS
 	type: '__test_top_left_snap_only',
 	getShapeUtil: () => __TopLeftSnapOnlyShapeUtil,
 	validator: { validate: (record) => record as __TopLeftSnapOnlyShape },
-	migrations: defineMigrations({ currentVersion: 0, firstVersion: 0, migrators: {} }),
+	migrations: defineMigrations({}),
 })

 const configWithCustomShape = new TldrawEditorConfig({ shapes: [__TopLeftSnapOnlyShapeDef] })
--- a/packages/tlschema/api-report.md
+++ b/packages/tlschema/api-report.md
@ -5,7 +5,6 @@
 ```ts

 import { BaseRecord } from '@tldraw/tlstore';
-import { defineMigrations } from '@tldraw/tlstore';
 import { ID } from '@tldraw/tlstore';
 import { Migrations } from '@tldraw/tlstore';
 import { RecordType } from '@tldraw/tlstore';
@ -24,7 +23,7 @@ export const alignValidator: T.Validator<"end" | "middle" | "start">;
 export const arrowheadValidator: T.Validator<"arrow" | "bar" | "diamond" | "dot" | "inverted" | "none" | "pipe" | "square" | "triangle">;

 // @public (undocumented)
-export const arrowShapeMigrations: Migrations;
+export const arrowShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const arrowShapeTypeValidator: T.Validator<TLArrowShape>;
@ -48,7 +47,7 @@ export const bookmarkAssetMigrations: Migrations;
 export const bookmarkAssetTypeValidator: T.Validator<TLBookmarkAsset>;

 // @public (undocumented)
-export const bookmarkShapeMigrations: Migrations;
+export const bookmarkShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const bookmarkShapeTypeValidator: T.Validator<TLBookmarkShape>;
@ -65,9 +64,6 @@ export interface Box2dModel {
    y: number;
 }

-// @public (undocumented)
-export const cameraTypeMigrations: Migrations;
-
 // @public (undocumented)
 export const cameraTypeValidator: T.Validator<TLCamera>;

@ -124,7 +120,7 @@ export const cursorValidator: T.Validator<TLCursor>;
 // @public (undocumented)
 export type CustomShapeTypeInfo = {
    type: string;
-    migrations: ReturnType<typeof defineMigrations>;
+    migrations?: Migrations;
    validator?: StoreValidator<TLShape>;
 };

@ -134,14 +130,11 @@ export const dashValidator: T.Validator<"dashed" | "dotted" | "draw" | "solid">;
 // @internal (undocumented)
 export const defaultDerivePresenceState: (store: TLStore) => Signal<null | TLInstancePresence>;

-// @public (undocumented)
-export const documentTypeMigrations: Migrations;
-
 // @public (undocumented)
 export const documentTypeValidator: T.Validator<TLDocument>;

 // @public (undocumented)
-export const drawShapeMigrations: Migrations;
+export const drawShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const drawShapeTypeValidator: T.Validator<TLDrawShape>;
@ -334,7 +327,7 @@ export type EmbedDefinition = {
 };

 // @public (undocumented)
-export const embedShapeMigrations: Migrations;
+export const embedShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const embedShapeTypeValidator: T.Validator<TLEmbedShape>;
@ -351,14 +344,11 @@ export function fixupRecord(oldRecord: TLRecord): {
 // @internal (undocumented)
 export const fontValidator: T.Validator<"draw" | "mono" | "sans" | "serif">;

-// @public (undocumented)
-export const frameShapeMigrations: Migrations;
-
 // @public (undocumented)
 export const frameShapeTypeValidator: T.Validator<TLFrameShape>;

 // @public (undocumented)
-export const geoShapeMigrations: Migrations;
+export const geoShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const geoShapeTypeValidator: T.Validator<TLGeoShape>;
@ -366,18 +356,12 @@ export const geoShapeTypeValidator: T.Validator<TLGeoShape>;
 // @internal (undocumented)
 export const geoValidator: T.Validator<"arrow-down" | "arrow-left" | "arrow-right" | "arrow-up" | "check-box" | "diamond" | "ellipse" | "hexagon" | "octagon" | "oval" | "pentagon" | "rectangle" | "rhombus-2" | "rhombus" | "star" | "trapezoid" | "triangle" | "x-box">;

-// @public (undocumented)
-export const groupShapeMigrations: Migrations;
-
 // @public (undocumented)
 export const groupShapeTypeValidator: T.Validator<TLGroupShape>;

 // @public (undocumented)
 export const handleTypeValidator: T.Validator<TLHandle>;

-// @public (undocumented)
-export const iconShapeMigrations: Migrations;
-
 // @public (undocumented)
 export const iconShapeTypeValidator: T.Validator<TLIconShape>;

@ -394,7 +378,7 @@ export const imageAssetMigrations: Migrations;
 export const imageAssetTypeValidator: T.Validator<TLImageAsset>;

 // @public (undocumented)
-export const imageShapeMigrations: Migrations;
+export const imageShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const imageShapeTypeValidator: T.Validator<TLImageShape>;
@ -420,14 +404,11 @@ export function isShape(record?: BaseRecord<string>): record is TLShape;
 // @public (undocumented)
 export function isShapeId(id?: string): id is TLShapeId;

-// @public (undocumented)
-export const lineShapeMigrations: Migrations;
-
 // @public (undocumented)
 export const lineShapeTypeValidator: T.Validator<TLLineShape>;

 // @public (undocumented)
-export const noteShapeMigrations: Migrations;
+export const noteShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const noteShapeTypeValidator: T.Validator<TLNoteShape>;
@ -441,9 +422,6 @@ export const opacityValidator: T.Validator<"0.1" | "0.25" | "0.5" | "0.75" | "1"
 // @internal (undocumented)
 export const pageIdValidator: T.Validator<TLPageId>;

-// @public (undocumented)
-export const pageTypeMigrations: Migrations;
-
 // @public (undocumented)
 export const pageTypeValidator: T.Validator<TLPage>;

@ -477,7 +455,7 @@ export const splineValidator: T.Validator<"cubic" | "line">;
 export const storeMigrations: Migrations;

 // @public (undocumented)
-export const textShapeMigrations: Migrations;
+export const textShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const textShapeTypeValidator: T.Validator<TLTextShape>;
@ -1390,9 +1368,6 @@ export const userPresenceTypeMigrations: Migrations;
 // @public (undocumented)
 export const userPresenceTypeValidator: T.Validator<TLUserPresence>;

-// @public (undocumented)
-export const userTypeMigrations: Migrations;
-
 // @public (undocumented)
 export const userTypeValidator: T.Validator<TLUser>;

@ -1413,7 +1388,7 @@ export const videoAssetMigrations: Migrations;
 export const videoAssetTypeValidator: T.Validator<TLVideoAsset>;

 // @public (undocumented)
-export const videoShapeMigrations: Migrations;
+export const videoShapeTypeMigrations: Migrations;

 // @public (undocumented)
 export const videoShapeTypeValidator: T.Validator<TLVideoShape>;
--- a/packages/tlschema/package.json
+++ b/packages/tlschema/package.json
@ -33,9 +33,6 @@
 	"scripts": {
 		"test": "lazy inherit",
 		"test-coverage": "lazy inherit",
-		"new-record": "node ./scripts/new-record.js",
-		"new-shape": "node ./scripts/new-shape.js",
-		"new-asset": "node ./scripts/new-asset.js",
 		"index": "node ./scripts/build-index.js && yarn format",
 		"format": "yarn run -T prettier --write \"src/**/*.{ts,tsx,js,jsx,json,md}\"",
 		"build": "yarn run -T tsx ../../scripts/build-package.ts",
--- a/packages/tlschema/scripts/new-asset.js
+++ b/packages/tlschema/scripts/new-asset.js
@ -1,78 +0,0 @@
-// @ts-check
-/* eslint-disable */
-
-const kleur = require('kleur')
-const fs = require('fs')
-const path = require('path')
-
-const typeName = process.argv[2]
-const lowerAssetName = typeName[2].toLowerCase() + typeName.slice(3)
-
-if (!typeName.match(/^TL[A-Z][a-z]+[a-zA-Z0-9]+Asset$/)) {
-	console.error(
-		kleur.red('ERROR: Type name must start with'),
-		`'${kleur.bold('TL')}'`,
-		kleur.red('and be in'),
-		kleur.bold('PascalCase'),
-		kleur.red('and end in'),
-		kleur.bold('Asset')
-	)
-	process.exit(1)
-}
-
-const recordsDir = path.join(__dirname, '..', 'src', 'assets')
-if (!fs.existsSync(recordsDir)) {
-	console.error(kleur.red("ERROR: Can't find assets directory at path"), recordsDir)
-	process.exit(1)
-}
-
-const filePath = path.join(recordsDir, `${typeName}.ts`)
-
-if (fs.existsSync(filePath)) {
-	console.error(kleur.red('ERROR: File already exists at path'), filePath)
-	process.exit(1)
-}
-
-const snakeCaseName =
-	typeName[2].toLowerCase() +
-	typeName
-		.slice(3, -5)
-		.replace(/[A-Z]/g, (match) => `_${match.toLowerCase()}`)
-		.trimStart()
-
-fs.writeFileSync(
-	filePath,
-	`import { defineMigrations } from '@tldraw/tlstore'
-import { TLAsset } from '../records/TLAsset'
-
-declare module '../records/TLAsset' {
-	interface GlobalAssetPropsMap {
-		${snakeCaseName}: ${typeName}Props
-	}
-}
-
-// IMPORTANT: If you update this interface, you must also bump the version number and add a migration
-export type ${typeName}Props = {}
-
-export type ${typeName} = Extract<TLAsset, { type: '${snakeCaseName}' }>
-
-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
-export const ${lowerAssetName}Migrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	firstVersion: Versions.Initial,
-	migrators: {
-	  // STEP 3: Add an up+down migration for the new version here
-  },
-})
-
-`
-)
-
-console.log(kleur.green('Created new record type at path'), filePath)
--- a/packages/tlschema/scripts/new-record.js
+++ b/packages/tlschema/scripts/new-record.js
@ -1,78 +0,0 @@
-// @ts-check
-/* eslint-disable */
-
-const kleur = require('kleur')
-const fs = require('fs')
-const path = require('path')
-
-const typeName = process.argv[2]
-
-if (!typeName.match(/^TL[A-Z][a-z]+[a-zA-Z0-9]+$/)) {
-	console.error(
-		kleur.red('ERROR: Type name must start with'),
-		`'${kleur.bold('TL')}'`,
-		kleur.red('and be in'),
-		kleur.bold('PascalCase')
-	)
-	process.exit(1)
-}
-
-const lowerCaseName = typeName[2].toLowerCase() + typeName.slice(3)
-
-const recordsDir = path.join(__dirname, '..', 'src', 'records')
-if (!fs.existsSync(recordsDir)) {
-	console.error(kleur.red("ERROR: Can't find records directory at path"), recordsDir)
-	process.exit(1)
-}
-
-const filePath = path.join(recordsDir, `${typeName}.ts`)
-
-if (fs.existsSync(filePath)) {
-	console.error(kleur.red('ERROR: File already exists at path'), filePath)
-	process.exit(1)
-}
-
-const snakeCaseName =
-	typeName[2].toLowerCase() +
-	typeName
-		.slice(3)
-		.replace(/[A-Z]/g, (match) => `_${match.toLowerCase()}`)
-		.trimStart()
-
-fs.writeFileSync(
-	filePath,
-	`import { BaseRecord, defineMigrations, createRecordType, ID } from '@tldraw/tlstore'
-
-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
-export const ${lowerCaseName}TypeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	firstVersion: Versions.Initial,
-	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
-	},
-})
-
-/**
- * ${typeName}
- */
-export interface ${typeName} extends BaseRecord<'${snakeCaseName}'> {}
-
-
-export const ${typeName} = createRecordType<${typeName}>('${snakeCaseName}', {
-	migrations: ${lowerCaseName}TypeMigrations,
-}).withDefaultProperties(() => ({
-}))
-
-export type ${typeName}Id = ID<${typeName}>
-
-`
-)
-
-console.log(kleur.green('Created new record type at path'), filePath)
--- a/packages/tlschema/src/assets/TLBookmarkAsset.ts
+++ b/packages/tlschema/src/assets/TLBookmarkAsset.ts
@ -14,7 +14,6 @@ export type TLBookmarkAsset = TLBaseAsset<
 	}
 >

-// --- VALIDATION ---
 /** @public */
 export const bookmarkAssetTypeValidator: T.Validator<TLBookmarkAsset> = createAssetValidator(
 	'bookmark',
@ -26,18 +25,5 @@ export const bookmarkAssetTypeValidator: T.Validator<TLBookmarkAsset> = createAs
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
 /** @public */
-export const bookmarkAssetMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	// STEP 3: Add an up+down migration for the new version here
-	migrators: {},
-})
+export const bookmarkAssetMigrations = defineMigrations({})
--- a/packages/tlschema/src/assets/TLImageAsset.ts
+++ b/packages/tlschema/src/assets/TLImageAsset.ts
@ -16,7 +16,6 @@ export type TLImageAsset = TLBaseAsset<
 	}
 >

-// --- VALIDATION ---
 /** @public */
 export const imageAssetTypeValidator: T.Validator<TLImageAsset> = createAssetValidator(
 	'image',
@ -30,21 +29,14 @@ export const imageAssetTypeValidator: T.Validator<TLImageAsset> = createAssetVal
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddIsAnimated: 1,
 	RenameWidthHeight: 2,
 } as const

 /** @public */
 export const imageAssetMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
 	currentVersion: Versions.RenameWidthHeight,
-	// STEP 3: Add an up+down migration for the new version here
 	migrators: {
 		[Versions.AddIsAnimated]: {
 			up: (asset) => {
--- a/packages/tlschema/src/assets/TLVideoAsset.ts
+++ b/packages/tlschema/src/assets/TLVideoAsset.ts
@ -17,7 +17,6 @@ export type TLVideoAsset = TLBaseAsset<
 	}
 >

-// --- VALIDATION ---
 /** @public */
 export const videoAssetTypeValidator: T.Validator<TLVideoAsset> = createAssetValidator(
 	'video',
@ -31,21 +30,14 @@ export const videoAssetTypeValidator: T.Validator<TLVideoAsset> = createAssetVal
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddIsAnimated: 1,
 	RenameWidthHeight: 2,
 } as const

 /** @public */
 export const videoAssetMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
 	currentVersion: Versions.RenameWidthHeight,
-	// STEP 3: Add an up+down migration for the new version here
 	migrators: {
 		[Versions.AddIsAnimated]: {
 			up: (asset) => {
--- a/packages/tlschema/src/createTLSchema.ts
+++ b/packages/tlschema/src/createTLSchema.ts
@ -1,4 +1,10 @@
-import { StoreSchema, StoreValidator, createRecordType, defineMigrations } from '@tldraw/tlstore'
+import {
+	Migrations,
+	StoreSchema,
+	StoreValidator,
+	createRecordType,
+	defineMigrations,
+} from '@tldraw/tlstore'
 import { T } from '@tldraw/tlvalidate'
 import { Signal } from 'signia'
 import { TLRecord } from './TLRecord'
@ -16,42 +22,42 @@ import { TLUser } from './records/TLUser'
 import { TLUserDocument } from './records/TLUserDocument'
 import { TLUserPresence } from './records/TLUserPresence'
 import { storeMigrations } from './schema'
-import { arrowShapeMigrations, arrowShapeTypeValidator } from './shapes/TLArrowShape'
-import { bookmarkShapeMigrations, bookmarkShapeTypeValidator } from './shapes/TLBookmarkShape'
-import { drawShapeMigrations, drawShapeTypeValidator } from './shapes/TLDrawShape'
-import { embedShapeMigrations, embedShapeTypeValidator } from './shapes/TLEmbedShape'
-import { frameShapeMigrations, frameShapeTypeValidator } from './shapes/TLFrameShape'
-import { geoShapeMigrations, geoShapeTypeValidator } from './shapes/TLGeoShape'
-import { groupShapeMigrations, groupShapeTypeValidator } from './shapes/TLGroupShape'
-import { imageShapeMigrations, imageShapeTypeValidator } from './shapes/TLImageShape'
-import { lineShapeMigrations, lineShapeTypeValidator } from './shapes/TLLineShape'
-import { noteShapeMigrations, noteShapeTypeValidator } from './shapes/TLNoteShape'
-import { textShapeMigrations, textShapeTypeValidator } from './shapes/TLTextShape'
-import { videoShapeMigrations, videoShapeTypeValidator } from './shapes/TLVideoShape'
+import { arrowShapeTypeMigrations, arrowShapeTypeValidator } from './shapes/TLArrowShape'
+import { bookmarkShapeTypeMigrations, bookmarkShapeTypeValidator } from './shapes/TLBookmarkShape'
+import { drawShapeTypeMigrations, drawShapeTypeValidator } from './shapes/TLDrawShape'
+import { embedShapeTypeMigrations, embedShapeTypeValidator } from './shapes/TLEmbedShape'
+import { frameShapeTypeMigrations, frameShapeTypeValidator } from './shapes/TLFrameShape'
+import { geoShapeTypeMigrations, geoShapeTypeValidator } from './shapes/TLGeoShape'
+import { groupShapeTypeMigrations, groupShapeTypeValidator } from './shapes/TLGroupShape'
+import { imageShapeTypeMigrations, imageShapeTypeValidator } from './shapes/TLImageShape'
+import { lineShapeTypeMigrations, lineShapeTypeValidator } from './shapes/TLLineShape'
+import { noteShapeTypeMigrations, noteShapeTypeValidator } from './shapes/TLNoteShape'
+import { textShapeTypeMigrations, textShapeTypeValidator } from './shapes/TLTextShape'
+import { videoShapeTypeMigrations, videoShapeTypeValidator } from './shapes/TLVideoShape'

 const CORE_SHAPE_DEFS: readonly CustomShapeTypeInfo[] = [
-	{ type: 'draw', migrations: drawShapeMigrations, validator: drawShapeTypeValidator },
-	{ type: 'text', migrations: textShapeMigrations, validator: textShapeTypeValidator },
-	{ type: 'line', migrations: lineShapeMigrations, validator: lineShapeTypeValidator },
-	{ type: 'arrow', migrations: arrowShapeMigrations, validator: arrowShapeTypeValidator },
-	{ type: 'image', migrations: imageShapeMigrations, validator: imageShapeTypeValidator },
-	{ type: 'video', migrations: videoShapeMigrations, validator: videoShapeTypeValidator },
-	{ type: 'geo', migrations: geoShapeMigrations, validator: geoShapeTypeValidator },
-	{ type: 'note', migrations: noteShapeMigrations, validator: noteShapeTypeValidator },
-	{ type: 'group', migrations: groupShapeMigrations, validator: groupShapeTypeValidator },
+	{ type: 'draw', migrations: drawShapeTypeMigrations, validator: drawShapeTypeValidator },
+	{ type: 'text', migrations: textShapeTypeMigrations, validator: textShapeTypeValidator },
+	{ type: 'line', migrations: lineShapeTypeMigrations, validator: lineShapeTypeValidator },
+	{ type: 'arrow', migrations: arrowShapeTypeMigrations, validator: arrowShapeTypeValidator },
+	{ type: 'image', migrations: imageShapeTypeMigrations, validator: imageShapeTypeValidator },
+	{ type: 'video', migrations: videoShapeTypeMigrations, validator: videoShapeTypeValidator },
+	{ type: 'geo', migrations: geoShapeTypeMigrations, validator: geoShapeTypeValidator },
+	{ type: 'note', migrations: noteShapeTypeMigrations, validator: noteShapeTypeValidator },
+	{ type: 'group', migrations: groupShapeTypeMigrations, validator: groupShapeTypeValidator },
 	{
 		type: 'bookmark',
-		migrations: bookmarkShapeMigrations,
+		migrations: bookmarkShapeTypeMigrations,
 		validator: bookmarkShapeTypeValidator,
 	},
-	{ type: 'frame', migrations: frameShapeMigrations, validator: frameShapeTypeValidator },
-	{ type: 'embed', migrations: embedShapeMigrations, validator: embedShapeTypeValidator },
+	{ type: 'frame', migrations: frameShapeTypeMigrations, validator: frameShapeTypeValidator },
+	{ type: 'embed', migrations: embedShapeTypeMigrations, validator: embedShapeTypeValidator },
 ]

 /** @public */
 export type CustomShapeTypeInfo = {
 	type: string
-	migrations: ReturnType<typeof defineMigrations>
+	migrations?: Migrations
 	validator?: StoreValidator<TLShape>
 }

@ -79,7 +85,9 @@ export function createTLSchema({
 		firstVersion: rootShapeTypeMigrations.firstVersion,
 		migrators: rootShapeTypeMigrations.migrators,
 		subTypeKey: 'type',
-		subTypeMigrations: Object.fromEntries(allShapeDefs.map((def) => [def.type, def.migrations])),
+		subTypeMigrations: Object.fromEntries(
+			allShapeDefs.map((def) => [def.type, def.migrations ?? {}])
+		) as Record<string, Migrations>,
 	})

 	let shapeValidator = T.union('type', {
--- a/packages/tlschema/src/index.ts
+++ b/packages/tlschema/src/index.ts
@ -37,18 +37,8 @@ export {
 	type TLAssetPartial,
 	type TLAssetShape,
 } from './records/TLAsset'
-export {
-	TLCamera,
-	cameraTypeMigrations,
-	cameraTypeValidator,
-	type TLCameraId,
-} from './records/TLCamera'
-export {
-	TLDOCUMENT_ID,
-	TLDocument,
-	documentTypeMigrations,
-	documentTypeValidator,
-} from './records/TLDocument'
+export { TLCamera, cameraTypeValidator, type TLCameraId } from './records/TLCamera'
+export { TLDOCUMENT_ID, TLDocument, documentTypeValidator } from './records/TLDocument'
 export {
 	TLInstance,
 	instanceTypeMigrations,
@ -63,7 +53,7 @@ export {
 	type TLInstancePageStateId,
 } from './records/TLInstancePageState'
 export { TLInstancePresence } from './records/TLInstancePresence'
-export { TLPage, pageTypeMigrations, pageTypeValidator, type TLPageId } from './records/TLPage'
+export { TLPage, pageTypeValidator, type TLPageId } from './records/TLPage'
 export {
 	createCustomShapeId,
 	createShapeId,
@ -80,7 +70,7 @@ export {
 	type TLShapeType,
 	type TLUnknownShape,
 } from './records/TLShape'
-export { TLUser, userTypeMigrations, userTypeValidator, type TLUserId } from './records/TLUser'
+export { TLUser, userTypeValidator, type TLUserId } from './records/TLUser'
 export {
 	TLUserDocument,
 	userDocumentTypeMigrations,
@ -96,7 +86,7 @@ export {
 export { storeMigrations } from './schema'
 export {
 	TL_ARROW_TERMINAL_TYPE,
-	arrowShapeMigrations,
+	arrowShapeTypeMigrations,
 	arrowShapeTypeValidator,
 	arrowTerminalTypeValidator,
 	type TLArrowHeadModel,
@ -106,14 +96,14 @@ export {
 	type TLArrowTerminalType,
 } from './shapes/TLArrowShape'
 export {
-	bookmarkShapeMigrations,
+	bookmarkShapeTypeMigrations,
 	bookmarkShapeTypeValidator,
 	type TLBookmarkShape,
 	type TLBookmarkShapeProps,
 } from './shapes/TLBookmarkShape'
 export {
 	TL_DRAW_SHAPE_SEGMENT_TYPE,
-	drawShapeMigrations,
+	drawShapeTypeMigrations,
 	drawShapeTypeValidator,
 	type TLDrawShape,
 	type TLDrawShapeProps,
@ -121,7 +111,7 @@ export {
 } from './shapes/TLDrawShape'
 export {
 	EMBED_DEFINITIONS,
-	embedShapeMigrations,
+	embedShapeTypeMigrations,
 	embedShapeTypeValidator,
 	tlEmbedShapePermissionDefaults,
 	type EmbedDefinition,
@ -131,56 +121,52 @@ export {
 	type TLEmbedShapeProps,
 } from './shapes/TLEmbedShape'
 export {
-	frameShapeMigrations,
 	frameShapeTypeValidator,
 	type TLFrameShape,
 	type TLFrameShapeProps,
 } from './shapes/TLFrameShape'
 export {
-	geoShapeMigrations,
+	geoShapeTypeMigrations,
 	geoShapeTypeValidator,
 	type TLGeoShape,
 	type TLGeoShapeProps,
 } from './shapes/TLGeoShape'
 export {
-	groupShapeMigrations,
 	groupShapeTypeValidator,
 	type TLGroupShape,
 	type TLGroupShapeProps,
 } from './shapes/TLGroupShape'
 export {
-	iconShapeMigrations,
 	iconShapeTypeValidator,
 	type TLIconShape,
 	type TLIconShapeProps,
 } from './shapes/TLIconShape'
 export {
-	imageShapeMigrations,
+	imageShapeTypeMigrations,
 	imageShapeTypeValidator,
 	type TLImageCrop,
 	type TLImageShape,
 	type TLImageShapeProps,
 } from './shapes/TLImageShape'
 export {
-	lineShapeMigrations,
 	lineShapeTypeValidator,
 	type TLLineShape,
 	type TLLineShapeProps,
 } from './shapes/TLLineShape'
 export {
-	noteShapeMigrations,
+	noteShapeTypeMigrations,
 	noteShapeTypeValidator,
 	type TLNoteShape,
 	type TLNoteShapeProps,
 } from './shapes/TLNoteShape'
 export {
-	textShapeMigrations,
+	textShapeTypeMigrations,
 	textShapeTypeValidator,
 	type TLTextShape,
 	type TLTextShapeProps,
 } from './shapes/TLTextShape'
 export {
-	videoShapeMigrations,
+	videoShapeTypeMigrations,
 	videoShapeTypeValidator,
 	type TLVideoShape,
 	type TLVideoShapeProps,
--- a/packages/tlschema/src/migrations.test.ts
+++ b/packages/tlschema/src/migrations.test.ts
@ -10,15 +10,15 @@ import { rootShapeTypeMigrations, TLShape } from './records/TLShape'
 import { userDocumentTypeMigrations, userDocumentVersions } from './records/TLUserDocument'
 import { userPresenceTypeMigrations } from './records/TLUserPresence'
 import { storeMigrations } from './schema'
-import { arrowShapeMigrations } from './shapes/TLArrowShape'
-import { bookmarkShapeMigrations } from './shapes/TLBookmarkShape'
-import { drawShapeMigrations } from './shapes/TLDrawShape'
-import { embedShapeMigrations } from './shapes/TLEmbedShape'
-import { geoShapeMigrations } from './shapes/TLGeoShape'
-import { imageShapeMigrations } from './shapes/TLImageShape'
-import { noteShapeMigrations } from './shapes/TLNoteShape'
-import { textShapeMigrations } from './shapes/TLTextShape'
-import { videoShapeMigrations } from './shapes/TLVideoShape'
+import { arrowShapeTypeMigrations } from './shapes/TLArrowShape'
+import { bookmarkShapeTypeMigrations } from './shapes/TLBookmarkShape'
+import { drawShapeTypeMigrations } from './shapes/TLDrawShape'
+import { embedShapeTypeMigrations } from './shapes/TLEmbedShape'
+import { geoShapeTypeMigrations } from './shapes/TLGeoShape'
+import { imageShapeTypeMigrations } from './shapes/TLImageShape'
+import { noteShapeTypeMigrations } from './shapes/TLNoteShape'
+import { textShapeTypeMigrations } from './shapes/TLTextShape'
+import { videoShapeTypeMigrations } from './shapes/TLVideoShape'

 const assetModules = fs
 	.readdirSync('src/assets')
@ -90,7 +90,9 @@ for (const [fileName, module] of allModules) {

 test('all modules export migrations', () => {
 	const modulesWithoutMigrations = allModules
-		.filter(([, module]) => !Object.keys(module).find((k) => k.endsWith('igrations')))
+		.filter(([, module]) => {
+			return !Object.keys(module).find((k) => k.endsWith('igrations'))
+		})
 		.map(([fileName]) => fileName)

 	// IF THIS LINE IS FAILING YOU NEED TO MAKE SURE THE MIGRATIONS ARE EXPORTED
@ -280,10 +282,10 @@ describe('Adding snap mode', () => {

 describe('Adding url props', () => {
 	for (const [name, { up, down }] of [
-		['video shape', videoShapeMigrations.migrators[1]],
-		['note shape', noteShapeMigrations.migrators[1]],
-		['geo shape', geoShapeMigrations.migrators[1]],
-		['image shape', imageShapeMigrations.migrators[1]],
+		['video shape', videoShapeTypeMigrations.migrators[1]],
+		['note shape', noteShapeTypeMigrations.migrators[1]],
+		['geo shape', geoShapeTypeMigrations.migrators[1]],
+		['image shape', imageShapeTypeMigrations.migrators[1]],
 	] as const) {
 		test(`${name}: up works as expected`, () => {
 			const before = { props: {} }
@ -300,7 +302,7 @@ describe('Adding url props', () => {
 })

 describe('Bookmark null asset id', () => {
-	const { up, down } = bookmarkShapeMigrations.migrators[1]
+	const { up, down } = bookmarkShapeTypeMigrations.migrators[1]
 	test('up works as expected', () => {
 		const before = { props: {} }
 		const after = { props: { assetId: null } }
@ -376,7 +378,7 @@ describe('Cleaning up junk data in instance.propsForNextShape', () => {
 })

 describe('Generating original URL from embed URL in GenOriginalUrlInEmbed', () => {
-	const { up, down } = embedShapeMigrations.migrators[1]
+	const { up, down } = embedShapeTypeMigrations.migrators[1]
 	test('up works as expected', () => {
 		expect(up({ props: { url: 'https://codepen.io/Rplus/embed/PWZYRM' } })).toEqual({
 			props: {
@ -417,7 +419,7 @@ describe('Generating original URL from embed URL in GenOriginalUrlInEmbed', () =
 })

 describe('Adding isPen prop', () => {
-	const { up, down } = drawShapeMigrations.migrators[1]
+	const { up, down } = drawShapeTypeMigrations.migrators[1]

 	test('up works as expected with a shape that is not a pen shape', () => {
 		expect(
@ -502,8 +504,8 @@ describe('Adding isLocked prop', () => {

 describe('Adding labelColor prop to geo / arrow shapes', () => {
 	for (const [name, { up, down }] of [
-		['arrow shape', arrowShapeMigrations.migrators[1]],
-		['geo shape', geoShapeMigrations.migrators[2]],
+		['arrow shape', arrowShapeTypeMigrations.migrators[1]],
+		['geo shape', geoShapeTypeMigrations.migrators[2]],
 	] as const) {
 		test(`${name}: up works as expected`, () => {
 			expect(up({ props: { color: 'red' } })).toEqual({
@ -600,9 +602,9 @@ describe('Adding zoomBrush prop to instance', () => {

 describe('Removing align=justify from shape align props', () => {
 	for (const [name, { up, down }] of [
-		['text', textShapeMigrations.migrators[1]],
-		['note', noteShapeMigrations.migrators[2]],
-		['geo', geoShapeMigrations.migrators[3]],
+		['text', textShapeTypeMigrations.migrators[1]],
+		['note', noteShapeTypeMigrations.migrators[2]],
+		['geo', geoShapeTypeMigrations.migrators[3]],
 	] as const) {
 		test(`${name}: up works as expected`, () => {
 			expect(up({ props: { align: 'justify' } })).toEqual({
@ -622,7 +624,7 @@ describe('Removing align=justify from shape align props', () => {
 })

 describe('Add crop=null to image shapes', () => {
-	const { up, down } = imageShapeMigrations.migrators[2]
+	const { up, down } = imageShapeTypeMigrations.migrators[2]
 	test('up works as expected', () => {
 		expect(up({ props: { w: 100 } })).toEqual({
 			props: { w: 100, crop: null },
@ -655,7 +657,7 @@ describe('Adding instance_presence to the schema', () => {
 })

 describe('Adding check-box to geo shape', () => {
-	const { up, down } = geoShapeMigrations.migrators[4]
+	const { up, down } = geoShapeTypeMigrations.migrators[4]

 	test('up works as expected', () => {
 		expect(up({ props: { geo: 'rectangle' } })).toEqual({ props: { geo: 'rectangle' } })
@ -667,7 +669,7 @@ describe('Adding check-box to geo shape', () => {
 })

 describe('Add verticalAlign to geo shape', () => {
-	const { up, down } = geoShapeMigrations.migrators[5]
+	const { up, down } = geoShapeTypeMigrations.migrators[5]

 	test('up works as expected', () => {
 		expect(up({ props: { type: 'ellipse' } })).toEqual({
--- a/packages/tlschema/src/records/TLAsset.ts
+++ b/packages/tlschema/src/records/TLAsset.ts
@ -14,7 +14,6 @@ import { TLShape } from './TLShape'
 /** @public */
 export type TLAsset = TLImageAsset | TLVideoAsset | TLBookmarkAsset

-// --- VALIDATION ---
 /** @public */
 export const assetTypeValidator: T.Validator<TLAsset> = T.model(
 	'asset',
@ -25,20 +24,8 @@ export const assetTypeValidator: T.Validator<TLAsset> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
 /** @public */
 export const assetTypeMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	// STEP 3: Add an up+down migration for the new version here
-	migrators: {},
 	subTypeKey: 'type',
 	subTypeMigrations: {
 		image: imageAssetMigrations,
--- a/packages/tlschema/src/records/TLCamera.ts
+++ b/packages/tlschema/src/records/TLCamera.ts
@ -16,7 +16,6 @@ export interface TLCamera extends BaseRecord<'camera'> {
 /** @public */
 export type TLCameraId = ID<TLCamera>

-// --- VALIDATION ---
 /** @public */
 export const cameraTypeValidator: T.Validator<TLCamera> = T.model(
 	'camera',
@ -29,25 +28,8 @@ export const cameraTypeValidator: T.Validator<TLCamera> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
-/** @public */
-export const cameraTypeMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	// STEP 3: Add an up+down migration for the new version here
-	migrators: {},
-})
-
 /** @public */
 export const TLCamera = createRecordType<TLCamera>('camera', {
-	migrations: cameraTypeMigrations,
 	validator: cameraTypeValidator,
 	scope: 'instance',
 }).withDefaultProperties(
@ -57,3 +39,6 @@ export const TLCamera = createRecordType<TLCamera>('camera', {
 		z: 1,
 	})
 )
+
+/** @public */
+export const cameraTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/records/TLDocument.ts
+++ b/packages/tlschema/src/records/TLDocument.ts
@ -10,7 +10,6 @@ export interface TLDocument extends BaseRecord<'document'> {
 	gridSize: number
 }

-// --- VALIDATION ---
 /** @public */
 export const documentTypeValidator: T.Validator<TLDocument> = T.model(
 	'document',
@ -21,25 +20,8 @@ export const documentTypeValidator: T.Validator<TLDocument> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
-/** @public */
-export const documentTypeMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	// STEP 3: Add an up+down migration for the new version here
-	migrators: {},
-})
-
 /** @public */
 export const TLDocument = createRecordType<TLDocument>('document', {
-	migrations: documentTypeMigrations,
 	validator: documentTypeValidator,
 	scope: 'document',
 }).withDefaultProperties(
@ -51,3 +33,6 @@ export const TLDocument = createRecordType<TLDocument>('document', {
 // all document records have the same ID: 'document:document'
 /** @public */
 export const TLDOCUMENT_ID: ID<TLDocument> = TLDocument.createCustomId('document')
+
+/** @public */
+export const documentTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/records/TLInstance.ts
+++ b/packages/tlschema/src/records/TLInstance.ts
@ -53,7 +53,6 @@ export interface TLInstance extends BaseRecord<'instance'> {
 /** @public */
 export type TLInstanceId = ID<TLInstance>

-// --- VALIDATION ---
 /** @public */
 export const instanceTypeValidator: T.Validator<TLInstance> = T.model(
 	'instance',
@ -91,11 +90,7 @@ export const instanceTypeValidator: T.Validator<TLInstance> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddTransparentExportBgs: 1,
 	RemoveDialog: 2,
 	AddToolLockMode: 3,
@ -110,10 +105,7 @@ const Versions = {

 /** @public */
 export const instanceTypeMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
 	currentVersion: Versions.AddScribbleDelay,
-	// STEP 3: Add an up+down migration for the new version here
 	migrators: {
 		[Versions.AddTransparentExportBgs]: {
 			up: (instance: TLInstance) => {
--- a/packages/tlschema/src/records/TLInstancePageState.ts
+++ b/packages/tlschema/src/records/TLInstancePageState.ts
@ -26,7 +26,6 @@ export interface TLInstancePageState extends BaseRecord<'instance_page_state'> {
 	focusLayerId: TLShapeId | null
 }

-// --- VALIDATION ---
 /** @public */
 export const instancePageStateTypeValidator: T.Validator<TLInstancePageState> = T.model(
 	'instance_page_state',
@ -46,17 +45,12 @@ export const instancePageStateTypeValidator: T.Validator<TLInstancePageState> =
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddCroppingId: 1,
 } as const

 /** @public */
 export const instancePageStateMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
 	currentVersion: Versions.AddCroppingId,
 	migrators: {
 		[Versions.AddCroppingId]: {
--- a/packages/tlschema/src/records/TLInstancePresence.ts
+++ b/packages/tlschema/src/records/TLInstancePresence.ts
@ -65,20 +65,13 @@ export const instancePresenceTypeValidator: T.Validator<TLInstancePresence> = T.
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddScribbleDelay: 1,
 } as const

 export const instancePresenceTypeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
 	currentVersion: Versions.AddScribbleDelay,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddScribbleDelay]: {
 			up: (instance) => {
 				if (instance.scribble !== null) {
--- a/packages/tlschema/src/records/TLPage.ts
+++ b/packages/tlschema/src/records/TLPage.ts
@ -15,7 +15,6 @@ export interface TLPage extends BaseRecord<'page'> {
 /** @public */
 export type TLPageId = ID<TLPage>

-// --- VALIDATION ---
 /** @public */
 export const pageTypeValidator: T.Validator<TLPage> = T.model(
 	'page',
@ -27,25 +26,11 @@ export const pageTypeValidator: T.Validator<TLPage> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
-/** @public */
-export const pageTypeMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	// STEP 3: Add an up+down migration for the new version here
-	migrators: {},
-})
-
 /** @public */
 export const TLPage = createRecordType<TLPage>('page', {
-	migrations: pageTypeMigrations,
 	validator: pageTypeValidator,
 	scope: 'document',
 })
+
+/** @public */
+export const pageTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/records/TLShape.ts
+++ b/packages/tlschema/src/records/TLShape.ts
@ -68,21 +68,14 @@ export type TLParentId = TLPageId | TLShapeId
 /** @public */
 export type TLNullableShapeProps = { [K in TLShapeProp]?: TLShapeProps[K] | null }

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddIsLocked: 1,
 } as const

 /** @internal */
 export const rootShapeTypeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
 	currentVersion: Versions.AddIsLocked,
-	firstVersion: Versions.Initial,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddIsLocked]: {
 			up: (record) => {
 				return {
--- a/packages/tlschema/src/records/TLUser.ts
+++ b/packages/tlschema/src/records/TLUser.ts
@ -15,7 +15,6 @@ export interface TLUser extends BaseRecord<'user'> {
 /** @public */
 export type TLUserId = ID<TLUser>

-// --- VALIDATION ---
 /** @public */
 export const userTypeValidator: T.Validator<TLUser> = T.model(
 	'user',
@ -27,26 +26,8 @@ export const userTypeValidator: T.Validator<TLUser> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
-/** @public */
-export const userTypeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	firstVersion: Versions.Initial,
-	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
-	},
-})
-
 /** @public */
 export const TLUser = createRecordType<TLUser>('user', {
-	migrations: userTypeMigrations,
 	validator: userTypeValidator,
 	scope: 'instance',
 }).withDefaultProperties((): Omit<TLUser, 'id' | 'typeName'> => {
@ -59,3 +40,6 @@ export const TLUser = createRecordType<TLUser>('user', {
 		locale,
 	}
 })
+
+/** @public */
+export const userTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/records/TLUserDocument.ts
+++ b/packages/tlschema/src/records/TLUserDocument.ts
@ -26,7 +26,6 @@ export interface TLUserDocument extends BaseRecord<'user_document'> {
 /** @public */
 export type TLUserDocumentId = ID<TLUserDocument>

-// --- VALIDATION ---
 /** @public */
 export const userDocumentTypeValidator: T.Validator<TLUserDocument> = T.model(
 	'user_document',
@ -44,11 +43,7 @@ export const userDocumentTypeValidator: T.Validator<TLUserDocument> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-export const userDocumentVersions = {
-	Initial: 0,
+export const Versions = {
 	AddSnapMode: 1,
 	AddMissingIsMobileMode: 2,
 	RemoveIsReadOnly: 3,
@ -56,12 +51,9 @@ export const userDocumentVersions = {

 /** @public */
 export const userDocumentTypeMigrations = defineMigrations({
-	firstVersion: userDocumentVersions.Initial,
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: userDocumentVersions.RemoveIsReadOnly,
-	// STEP 3: Add an up+down migration for the new version here
+	currentVersion: Versions.RemoveIsReadOnly,
 	migrators: {
-		[userDocumentVersions.AddSnapMode]: {
+		[Versions.AddSnapMode]: {
 			up: (userDocument: TLUserDocument) => {
 				return { ...userDocument, isSnapMode: false }
 			},
@ -69,7 +61,7 @@ export const userDocumentTypeMigrations = defineMigrations({
 				return userDocument
 			},
 		},
-		[userDocumentVersions.AddMissingIsMobileMode]: {
+		[Versions.AddMissingIsMobileMode]: {
 			up: (userDocument: TLUserDocument) => {
 				return { ...userDocument, isMobileMode: userDocument.isMobileMode ?? false }
 			},
@ -77,7 +69,7 @@ export const userDocumentTypeMigrations = defineMigrations({
 				return userDocument
 			},
 		},
-		[userDocumentVersions.RemoveIsReadOnly]: {
+		[Versions.RemoveIsReadOnly]: {
 			up: ({ isReadOnly: _, ...userDocument }: TLUserDocument & { isReadOnly: boolean }) => {
 				return userDocument
 			},
@ -107,3 +99,5 @@ export const TLUserDocument = createRecordType<TLUserDocument>('user_document',
 		lastUsedTabId: null,
 	})
 )
+
+export { Versions as userDocumentVersions }
--- a/packages/tlschema/src/records/TLUserPresence.ts
+++ b/packages/tlschema/src/records/TLUserPresence.ts
@ -18,7 +18,6 @@ export interface TLUserPresence extends BaseRecord<'user_presence'> {
 /** @public */
 export type TLUserPresenceId = ID<TLUserPresence>

-// --- VALIDATION ---
 /** @public */
 export const userPresenceTypeValidator: T.Validator<TLUserPresence> = T.model(
 	'user_presence',
@ -34,21 +33,14 @@ export const userPresenceTypeValidator: T.Validator<TLUserPresence> = T.model(
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddViewportPageBounds: 1,
 } as const

 /** @public */
 export const userPresenceTypeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
 	currentVersion: Versions.AddViewportPageBounds,
-	firstVersion: Versions.Initial,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddViewportPageBounds]: {
 			up: (record) => {
 				return {
--- a/packages/tlschema/src/schema.ts
+++ b/packages/tlschema/src/schema.ts
@ -1,22 +1,15 @@
 import { defineMigrations, StoreSnapshot } from '@tldraw/tlstore'
 import { TLRecord } from './TLRecord'

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	RemoveCodeAndIconShapeTypes: 1,
 	AddInstancePresenceType: 2,
 } as const

 /** @public */
 export const storeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
 	currentVersion: Versions.AddInstancePresenceType,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.RemoveCodeAndIconShapeTypes]: {
 			up: (store: StoreSnapshot<TLRecord>) => {
 				return Object.fromEntries(
--- a/packages/tlschema/src/shapes/TLArrowShape.ts
+++ b/packages/tlschema/src/shapes/TLArrowShape.ts
@ -70,7 +70,6 @@ export interface TLArrowHeadModel {
 	type: TLArrowheadType
 }

-// --- VALIDATION ---
 /** @public */
 export const arrowTerminalTypeValidator: T.Validator<TLArrowTerminal> = T.union('type', {
 	binding: T.object({
@ -106,21 +105,14 @@ export const arrowShapeTypeValidator: T.Validator<TLArrowShape> = createShapeVal
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddLabelColor: 1,
 } as const

 /** @public */
-export const arrowShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
+export const arrowShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.AddLabelColor,
-	firstVersion: Versions.Initial,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddLabelColor]: {
 			up: (record) => {
 				return {
--- a/packages/tlschema/src/shapes/TLBookmarkShape.ts
+++ b/packages/tlschema/src/shapes/TLBookmarkShape.ts
@ -17,7 +17,6 @@ export type TLBookmarkShapeProps = {
 /** @public */
 export type TLBookmarkShape = TLBaseShape<'bookmark', TLBookmarkShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const bookmarkShapeTypeValidator: T.Validator<TLBookmarkShape> = createShapeValidator(
 	'bookmark',
@ -30,20 +29,13 @@ export const bookmarkShapeTypeValidator: T.Validator<TLBookmarkShape> = createSh
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	NullAssetId: 1,
 } as const

 /** @public */
-export const bookmarkShapeMigrations = defineMigrations({
-	firstVersion: Versions.Initial,
-	// STEP 2: Update the current version to point to your latest version
+export const bookmarkShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.NullAssetId,
-	// STEP 3: Add an up+down migration for the new version here
 	migrators: {
 		[Versions.NullAssetId]: {
 			up: (shape: TLBookmarkShape) => {
--- a/packages/tlschema/src/shapes/TLDrawShape.ts
+++ b/packages/tlschema/src/shapes/TLDrawShape.ts
@ -37,7 +37,6 @@ export type TLDrawShapeProps = {
 /** @public */
 export type TLDrawShape = TLBaseShape<'draw', TLDrawShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const drawShapeTypeValidator: T.Validator<TLDrawShape> = createShapeValidator(
 	'draw',
@ -59,21 +58,14 @@ export const drawShapeTypeValidator: T.Validator<TLDrawShape> = createShapeValid
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddInPen: 1,
 } as const

 /** @public */
-export const drawShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
+export const drawShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.AddInPen,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddInPen]: {
 			up: (shape) => {
 				// Rather than checking to see whether the shape is a pen at runtime,
--- a/packages/tlschema/src/shapes/TLEmbedShape.ts
+++ b/packages/tlschema/src/shapes/TLEmbedShape.ts
@ -78,7 +78,6 @@ export type TLEmbedShapeProps = {
 /** @public */
 export type TLEmbedShape = TLBaseShape<'embed', TLEmbedShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const embedShapeTypeValidator: T.Validator<TLEmbedShape> = createShapeValidator(
 	'embed',
@ -605,21 +604,14 @@ export const EMBED_DEFINITIONS = [
 	},
 ] as const satisfies readonly EmbedDefinition[]

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	GenOriginalUrlInEmbed: 1,
 } as const

 /** @public */
-export const embedShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
+export const embedShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.GenOriginalUrlInEmbed,
-	firstVersion: Versions.Initial,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.GenOriginalUrlInEmbed]: {
 			// add tmpOldUrl property
 			up: (shape) => {
--- a/packages/tlschema/src/shapes/TLFrameShape.ts
+++ b/packages/tlschema/src/shapes/TLFrameShape.ts
@ -15,7 +15,6 @@ export type TLFrameShapeProps = {
 /** @public */
 export type TLFrameShape = TLBaseShape<'frame', TLFrameShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const frameShapeTypeValidator: T.Validator<TLFrameShape> = createShapeValidator(
 	'frame',
@ -27,19 +26,5 @@ export const frameShapeTypeValidator: T.Validator<TLFrameShape> = createShapeVal
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
 /** @public */
-export const frameShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	firstVersion: Versions.Initial,
-	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
-	},
-})
+export const frameShapeTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/shapes/TLGeoShape.ts
+++ b/packages/tlschema/src/shapes/TLGeoShape.ts
@ -46,7 +46,6 @@ export type TLGeoShapeProps = {
 /** @public */
 export type TLGeoShape = TLBaseShape<'geo', TLGeoShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const geoShapeTypeValidator: T.Validator<TLGeoShape> = createShapeValidator(
 	'geo',
@ -69,11 +68,7 @@ export const geoShapeTypeValidator: T.Validator<TLGeoShape> = createShapeValidat
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddUrlProp: 1,
 	AddLabelColor: 2,
 	RemoveJustify: 3,
@ -82,12 +77,9 @@ const Versions = {
 } as const

 /** @public */
-export const geoShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
+export const geoShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.AddVerticalAlign,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddUrlProp]: {
 			up: (shape) => {
 				return { ...shape, props: { ...shape.props, url: '' } }
--- a/packages/tlschema/src/shapes/TLGroupShape.ts
+++ b/packages/tlschema/src/shapes/TLGroupShape.ts
@ -12,7 +12,6 @@ export type TLGroupShapeProps = {
 /** @public */
 export type TLGroupShape = TLBaseShape<'group', TLGroupShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const groupShapeTypeValidator: T.Validator<TLGroupShape> = createShapeValidator(
 	'group',
@ -21,19 +20,5 @@ export const groupShapeTypeValidator: T.Validator<TLGroupShape> = createShapeVal
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
 /** @public */
-export const groupShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	firstVersion: Versions.Initial,
-	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
-	},
-})
+export const groupShapeTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/shapes/TLIconShape.ts
+++ b/packages/tlschema/src/shapes/TLIconShape.ts
@ -23,7 +23,6 @@ export type TLIconShapeProps = {
 /** @public */
 export type TLIconShape = TLBaseShape<'icon', TLIconShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const iconShapeTypeValidator: T.Validator<TLIconShape> = createShapeValidator(
 	'icon',
@ -37,19 +36,5 @@ export const iconShapeTypeValidator: T.Validator<TLIconShape> = createShapeValid
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
 /** @public */
-export const iconShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	firstVersion: Versions.Initial,
-	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
-	},
-})
+export const iconShapeTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/shapes/TLImageShape.ts
+++ b/packages/tlschema/src/shapes/TLImageShape.ts
@ -32,7 +32,6 @@ export const cropValidator = T.object({
 /** @public */
 export type TLImageShape = TLBaseShape<'image', TLImageShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const imageShapeTypeValidator: T.Validator<TLImageShape> = createShapeValidator(
 	'image',
@ -47,22 +46,15 @@ export const imageShapeTypeValidator: T.Validator<TLImageShape> = createShapeVal
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddUrlProp: 1,
 	AddCropProp: 2,
 } as const

 /** @public */
-export const imageShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
+export const imageShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.AddCropProp,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddUrlProp]: {
 			up: (shape) => {
 				return { ...shape, props: { ...shape.props, url: '' } }
--- a/packages/tlschema/src/shapes/TLLineShape.ts
+++ b/packages/tlschema/src/shapes/TLLineShape.ts
@ -26,7 +26,6 @@ export type TLLineShapeProps = {
 /** @public */
 export type TLLineShape = TLBaseShape<'line', TLLineShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const lineShapeTypeValidator: T.Validator<TLLineShape> = createShapeValidator(
 	'line',
@ -40,19 +39,5 @@ export const lineShapeTypeValidator: T.Validator<TLLineShape> = createShapeValid
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
-const Versions = {
-	Initial: 0,
-} as const
-
 /** @public */
-export const lineShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	currentVersion: Versions.Initial,
-	firstVersion: Versions.Initial,
-	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
-	},
-})
+export const lineShapeTypeMigrations = defineMigrations({})
--- a/packages/tlschema/src/shapes/TLNoteShape.ts
+++ b/packages/tlschema/src/shapes/TLNoteShape.ts
@ -25,7 +25,6 @@ export type TLNoteShapeProps = {
 /** @public */
 export type TLNoteShape = TLBaseShape<'note', TLNoteShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const noteShapeTypeValidator: T.Validator<TLNoteShape> = createShapeValidator(
 	'note',
@ -41,22 +40,15 @@ export const noteShapeTypeValidator: T.Validator<TLNoteShape> = createShapeValid
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddUrlProp: 1,
 	RemoveJustify: 2,
 } as const

 /** @public */
-export const noteShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
+export const noteShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.RemoveJustify,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddUrlProp]: {
 			up: (shape) => {
 				return { ...shape, props: { ...shape.props, url: '' } }
--- a/packages/tlschema/src/shapes/TLTextShape.ts
+++ b/packages/tlschema/src/shapes/TLTextShape.ts
@ -26,7 +26,6 @@ export type TLTextShapeProps = {
 /** @public */
 export type TLTextShape = TLBaseShape<'text', TLTextShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const textShapeTypeValidator: T.Validator<TLTextShape> = createShapeValidator(
 	'text',
@ -43,18 +42,12 @@ export const textShapeTypeValidator: T.Validator<TLTextShape> = createShapeValid
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	RemoveJustify: 1,
 } as const

 /** @public */
-export const textShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
+export const textShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.RemoveJustify,
 	migrators: {
 		[Versions.RemoveJustify]: {
--- a/packages/tlschema/src/shapes/TLVideoShape.ts
+++ b/packages/tlschema/src/shapes/TLVideoShape.ts
@ -19,7 +19,6 @@ export type TLVideoShapeProps = {
 /** @public */
 export type TLVideoShape = TLBaseShape<'video', TLVideoShapeProps>

-// --- VALIDATION ---
 /** @public */
 export const videoShapeTypeValidator: T.Validator<TLVideoShape> = createShapeValidator(
 	'video',
@ -34,21 +33,14 @@ export const videoShapeTypeValidator: T.Validator<TLVideoShape> = createShapeVal
 	})
 )

-// --- MIGRATIONS ---
-// STEP 1: Add a new version number here, give it a meaningful name.
-// It should be 1 higher than the current version
 const Versions = {
-	Initial: 0,
 	AddUrlProp: 1,
 } as const

 /** @public */
-export const videoShapeMigrations = defineMigrations({
-	// STEP 2: Update the current version to point to your latest version
-	firstVersion: Versions.Initial,
+export const videoShapeTypeMigrations = defineMigrations({
 	currentVersion: Versions.AddUrlProp,
 	migrators: {
-		// STEP 3: Add an up+down migration for the new version here
 		[Versions.AddUrlProp]: {
 			up: (shape) => {
 				return { ...shape, props: { ...shape.props, url: '' } }
--- a/packages/tlstore/api-report.md
+++ b/packages/tlstore/api-report.md
@ -47,12 +47,16 @@ export function createRecordType<R extends BaseRecord>(typeName: R['typeName'],
 }): RecordType<R, keyof Omit<R, 'id' | 'typeName'>>;

 // @public (undocumented)
-export function defineMigrations<FirstVersion extends number, CurrentVersion extends number>({ firstVersion, currentVersion, migrators, subTypeKey, subTypeMigrations, }: {
-    firstVersion: FirstVersion;
-    currentVersion: CurrentVersion;
-    migrators: {
+export function defineMigrations<FirstVersion extends EMPTY_SYMBOL | number = EMPTY_SYMBOL, CurrentVersion extends EMPTY_SYMBOL | Exclude<number, 0> = EMPTY_SYMBOL>(opts: {
+    firstVersion?: CurrentVersion extends number ? FirstVersion : never;
+    currentVersion?: CurrentVersion;
+    migrators?: CurrentVersion extends number ? FirstVersion extends number ? CurrentVersion extends FirstVersion ? {
+        [version in Exclude<Range_2<1, CurrentVersion>, 0>]: Migration;
+    } : {
        [version in Exclude<Range_2<FirstVersion, CurrentVersion>, FirstVersion>]: Migration;
-    };
+    } : {
+        [version in Exclude<Range_2<1, CurrentVersion>, 0>]: Migration;
+    } : never;
    subTypeKey?: string;
    subTypeMigrations?: Record<string, BaseMigrationsInfo>;
 }): Migrations;
@ -106,9 +110,9 @@ export function migrateRecord<R extends BaseRecord>({ record, migrations, fromVe
 }): MigrationResult<R>;

 // @public (undocumented)
-export type Migration<T = any> = {
-    up: (oldState: T) => T;
-    down: (newState: T) => T;
+export type Migration<Before = any, After = any> = {
+    up: (oldState: Before) => After;
+    down: (newState: After) => Before;
 };

 // @public (undocumented)
--- a/packages/tlstore/src/lib/migrate.ts
+++ b/packages/tlstore/src/lib/migrate.ts
@ -1,29 +1,49 @@
 import { BaseRecord, isRecord } from './BaseRecord'
 import { SerializedSchema } from './StoreSchema'

+type EMPTY_SYMBOL = symbol
+
 /** @public */
-export function defineMigrations<FirstVersion extends number, CurrentVersion extends number>({
-	firstVersion,
-	currentVersion,
-	migrators,
-	subTypeKey,
-	subTypeMigrations,
-}: {
-	firstVersion: FirstVersion
-	currentVersion: CurrentVersion
-	migrators: {
-		[version in Exclude<Range<FirstVersion, CurrentVersion>, FirstVersion>]: Migration
-	}
+export function defineMigrations<
+	FirstVersion extends number | EMPTY_SYMBOL = EMPTY_SYMBOL,
+	CurrentVersion extends Exclude<number, 0> | EMPTY_SYMBOL = EMPTY_SYMBOL
+>(opts: {
+	firstVersion?: CurrentVersion extends number ? FirstVersion : never
+	currentVersion?: CurrentVersion
+	migrators?: CurrentVersion extends number
+		? FirstVersion extends number
+			? CurrentVersion extends FirstVersion
+				? { [version in Exclude<Range<1, CurrentVersion>, 0>]: Migration }
+				: { [version in Exclude<Range<FirstVersion, CurrentVersion>, FirstVersion>]: Migration }
+			: { [version in Exclude<Range<1, CurrentVersion>, 0>]: Migration }
+		: never
 	subTypeKey?: string
 	subTypeMigrations?: Record<string, BaseMigrationsInfo>
 }): Migrations {
-	return { currentVersion, firstVersion, migrators, subTypeKey, subTypeMigrations }
+	const { currentVersion, firstVersion, migrators = {}, subTypeKey, subTypeMigrations } = opts
+
+	// Some basic guards against impossible version combinations, some of which will be caught by TypeScript
+	if (typeof currentVersion === 'number' && typeof firstVersion === 'number') {
+		if ((currentVersion as number) === (firstVersion as number)) {
+			throw Error(`Current version is equal to initial version.`)
+		} else if (currentVersion < firstVersion) {
+			throw Error(`Current version is lower than initial version.`)
+		}
+	}
+
+	return {
+		firstVersion: (firstVersion as number) ?? 0, // defaults
+		currentVersion: (currentVersion as number) ?? 0, // defaults
+		migrators,
+		subTypeKey,
+		subTypeMigrations,
+	}
 }

 /** @public */
-export type Migration<T = any> = {
-	up: (oldState: T) => T
-	down: (newState: T) => T
+export type Migration<Before = any, After = any> = {
+	up: (oldState: Before) => After
+	down: (newState: After) => Before
 }

 interface BaseMigrationsInfo {
--- a/packages/tlstore/src/lib/test/defineMigrations.test.ts
+++ b/packages/tlstore/src/lib/test/defineMigrations.test.ts
@ -0,0 +1,229 @@
+import { defineMigrations } from '../migrate'
+
+const Versions = {
+	Initial: 0,
+	January: 1,
+	February: 2,
+	March: 3,
+} as const
+
+describe('define migrations tests', () => {
+	it('defines migrations', () => {
+		expect(() => {
+			// no versions
+			defineMigrations({
+				// @ts-expect-error first version without current version
+				firstVersion: Versions.Initial,
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// no versions
+			defineMigrations({
+				// @ts-expect-error first version without current version
+				firstVersion: Versions.February,
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// empty migrators
+			defineMigrations({
+				// @ts-expect-error
+				migrators: {},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// no versions!
+			defineMigrations({
+				// @ts-expect-error
+				migrators: {
+					[Versions.February]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// wrong current version!
+			defineMigrations({
+				currentVersion: Versions.January,
+				migrators: {
+					// @ts-expect-error
+					[Versions.February]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			defineMigrations({
+				currentVersion: Versions.February,
+				migrators: {
+					// has a default zero version
+					[Versions.January]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+					// has a current version
+					[Versions.February]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// can't provide only first version
+			defineMigrations({
+				// @ts-expect-error first version without current version
+				firstVersion: Versions.January,
+				// @ts-expect-error migrators without current version
+				migrators: {},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// same version
+			defineMigrations({
+				firstVersion: Versions.Initial,
+				currentVersion: Versions.Initial,
+				migrators: {},
+			})
+		}).toThrowError()
+
+		expect(() => {
+			// only first version
+			defineMigrations({
+				// @ts-expect-error
+				firstVersion: Versions.January,
+				// @ts-expect-error
+				migrators: {},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// missing only version
+			defineMigrations({
+				firstVersion: Versions.January,
+				currentVersion: Versions.January,
+				// @ts-expect-error
+				migrators: {},
+			})
+		}).toThrowError()
+
+		expect(() => {
+			// only version, explicit start and current
+			defineMigrations({
+				firstVersion: Versions.January,
+				currentVersion: Versions.January,
+				migrators: {
+					[Versions.January]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).toThrowError()
+
+		expect(() => {
+			// missing later versions
+			defineMigrations({
+				firstVersion: Versions.January,
+				currentVersion: Versions.February,
+				// @ts-expect-error
+				migrators: {},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// missing later versions
+			defineMigrations({
+				firstVersion: Versions.Initial,
+				currentVersion: Versions.February,
+				// @ts-expect-error
+				migrators: {
+					[Versions.January]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// missing earlier versions
+			defineMigrations({
+				firstVersion: Versions.Initial,
+				currentVersion: Versions.February,
+				// @ts-expect-error
+				migrators: {
+					[Versions.February]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// got em all
+			defineMigrations({
+				firstVersion: Versions.Initial,
+				currentVersion: Versions.February,
+				migrators: {
+					[Versions.January]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+					[Versions.February]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// got em all starting later
+			defineMigrations({
+				firstVersion: Versions.January,
+				currentVersion: Versions.March,
+				migrators: {
+					[Versions.February]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+					[Versions.March]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+
+		expect(() => {
+			// first migration should be first version + 1
+			defineMigrations({
+				firstVersion: Versions.February,
+				currentVersion: Versions.March,
+				migrators: {
+					// @ts-expect-error
+					[Versions.February]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+					[Versions.March]: {
+						up: (rec: any) => rec,
+						down: (rec: any) => rec,
+					},
+				},
+			})
+		}).not.toThrowError()
+	})
+})
--- a/packages/tlstore/src/lib/test/testSchema.v0.ts
+++ b/packages/tlstore/src/lib/test/testSchema.v0.ts
@ -4,20 +4,12 @@ import { createRecordType } from '../RecordType'
 import { StoreSchema } from '../StoreSchema'
 import { defineMigrations } from '../migrate'

-const UserVersion = {
-	Initial: 0,
-} as const
-
 /** A user of tldraw */
 interface User extends BaseRecord<'user'> {
 	name: string
 }

-const userMigrations = defineMigrations({
-	currentVersion: UserVersion.Initial,
-	firstVersion: UserVersion.Initial,
-	migrators: {},
-})
+const userMigrations = defineMigrations({})

 const User = createRecordType<User>('user', {
 	migrations: userMigrations,
@ -32,14 +24,6 @@ const User = createRecordType<User>('user', {
 	scope: 'document',
 })

-const ShapeVersion = {
-	Initial: 0,
-} as const
-
-const RectangleVersion = {
-	Initial: 0,
-} as const
-
 interface Shape<Props> extends BaseRecord<'shape'> {
 	type: string
 	x: number
@ -58,22 +42,15 @@ interface OvalProps {
 	borderStyle: 'solid' | 'dashed'
 }

-const shapeMigrations = defineMigrations({
-	currentVersion: ShapeVersion.Initial,
-	firstVersion: ShapeVersion.Initial,
-	migrators: {},
+const shapeTypeMigrations = defineMigrations({
 	subTypeKey: 'type',
 	subTypeMigrations: {
-		rectangle: defineMigrations({
-			currentVersion: RectangleVersion.Initial,
-			firstVersion: RectangleVersion.Initial,
-			migrators: {},
-		}),
+		rectangle: defineMigrations({}),
 	},
 })

 const Shape = createRecordType<Shape<RectangleProps | OvalProps>>('shape', {
-	migrations: shapeMigrations,
+	migrations: shapeTypeMigrations,
 	validator: {
 		validate: (record) => {
 			assert(
@ -100,7 +77,7 @@ interface Org extends BaseRecord<'org'> {
 }

 const Org = createRecordType<Org>('org', {
-	migrations: defineMigrations({ currentVersion: 0, firstVersion: 0, migrators: {} }),
+	migrations: defineMigrations({}),
 	validator: {
 		validate: (record) => {
 			assert(
@ -119,6 +96,6 @@ export const testSchemaV0 = StoreSchema.create(
 		org: Org,
 	},
 	{
-		snapshotMigrations: defineMigrations({ currentVersion: 0, firstVersion: 0, migrators: {} }),
+		snapshotMigrations: defineMigrations({}),
 	}
 )
--- a/packages/tlstore/src/lib/test/testSchema.v1.ts
+++ b/packages/tlstore/src/lib/test/testSchema.v1.ts
@ -6,7 +6,6 @@ import { StoreSchema } from '../StoreSchema'
 import { defineMigrations } from '../migrate'

 const UserVersion = {
-	Initial: 0,
 	AddLocale: 1,
 	AddPhoneNumber: 2,
 } as const
@ -20,7 +19,6 @@ interface User extends BaseRecord<'user'> {

 const userMigrations = defineMigrations({
 	currentVersion: UserVersion.AddPhoneNumber,
-	firstVersion: UserVersion.Initial,
 	migrators: {
 		[UserVersion.AddLocale]: {
 			up: (record) => ({
@ -69,18 +67,15 @@ const User = createRecordType<User>('user', {
 }))

 const ShapeVersion = {
-	Initial: 0,
 	AddRotation: 1,
 	AddParent: 2,
 } as const

 const RectangleVersion = {
-	Initial: 0,
 	AddOpacity: 1,
 } as const

 const OvalVersion = {
-	Initial: 0,
 	AddBorderStyle: 1,
 } as const

@ -104,9 +99,8 @@ interface OvalProps {
 	borderStyle: 'solid' | 'dashed'
 }

-const shapeMigrations = defineMigrations({
+const shapeTypeMigrations = defineMigrations({
 	currentVersion: ShapeVersion.AddParent,
-	firstVersion: ShapeVersion.Initial,
 	migrators: {
 		[ShapeVersion.AddRotation]: {
 			up: (record) => ({
@ -135,7 +129,6 @@ const shapeMigrations = defineMigrations({
 	subTypeMigrations: {
 		rectangle: defineMigrations({
 			currentVersion: RectangleVersion.AddOpacity,
-			firstVersion: RectangleVersion.Initial,
 			migrators: {
 				[RectangleVersion.AddOpacity]: {
 					up: (record) => ({
@ -157,7 +150,6 @@ const shapeMigrations = defineMigrations({
 		}),
 		oval: defineMigrations({
 			currentVersion: OvalVersion.AddBorderStyle,
-			firstVersion: OvalVersion.Initial,
 			migrators: {
 				[OvalVersion.AddBorderStyle]: {
 					up: (record) => ({
@ -181,7 +173,7 @@ const shapeMigrations = defineMigrations({
 })

 const Shape = createRecordType<Shape<RectangleProps | OvalProps>>('shape', {
-	migrations: shapeMigrations,
+	migrations: shapeTypeMigrations,
 	validator: {
 		validate: (record) => {
 			assert(record && typeof record === 'object')
@ -202,13 +194,11 @@ const Shape = createRecordType<Shape<RectangleProps | OvalProps>>('shape', {
 }))

 const StoreVersions = {
-	Initial: 0,
 	RemoveOrg: 1,
 }

 const snapshotMigrations = defineMigrations({
 	currentVersion: StoreVersions.RemoveOrg,
-	firstVersion: StoreVersions.Initial,
 	migrators: {
 		[StoreVersions.RemoveOrg]: {
 			up: (store: StoreSnapshot<any>) => {