diff --git a/tree/readme.md b/tree/readme.md
deleted file mode 100644
index 941da822e0d..00000000000
--- a/tree/readme.md
+++ /dev/null
@@ -1,43 +0,0 @@
-# $mol_tree
-
-Tree format support (parsing, serialization, processing).
-
-[Reference implementation on D](https://github.com/nin-jin/tree.d)
-
-## Articles
-
-* [Tree — убийца JSON, XML, YAML и иже с ними](https://github.com/nin-jin/slides/tree/master/tree) - Tree format description
-
-## MAM Usage
-
-```typescript
-const users = $mol_tree.fromString(`
-user
-	name \\Jin
-	age 35
-user
-	name \\John
-	age 25
-`);
-```
-
-## NPM Usage
-
-```sh
-npm install mol_tree
-```
-
-```typescript
-import { $mol_tree as Tree } from 'mol_tree'
-
-const users = Tree.fromString(`
-user
-	name \\Jin
-	age 35
-user
-	name \\John
-	age 25
-`);
-```
-
-[![Edit $mol_type example](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/s/moltree-example-58uzh)
diff --git a/tree/tree.test.ts b/tree/tree.test.ts
deleted file mode 100644
index 9ba148ca271..00000000000
--- a/tree/tree.test.ts
+++ /dev/null
@@ -1,77 +0,0 @@
-namespace $ {
-	$mol_test( {
-		
-		'tree parsing'() {
-			
-			$mol_assert_equal( $mol_tree.fromString( "foo\nbar\n" ).sub.length , 2 )
-			$mol_assert_equal( $mol_tree.fromString( "foo\nbar\n" ).sub[ 1 ].type , "bar" )
-			$mol_assert_equal( $mol_tree.fromString( "foo\n\n\n" ).sub.length , 1 )
-			
-			$mol_assert_equal( $mol_tree.fromString( "=foo\n\\bar\n" ).sub.length , 2 )
-			$mol_assert_equal( $mol_tree.fromString( "=foo\n\\bar\n" ).sub[ 1 ].data , "bar" )
-			
-			$mol_assert_equal( $mol_tree.fromString( "foo bar \\pol" ).sub[ 0 ].sub[ 0 ].sub[ 0 ].data , "pol" )
-			$mol_assert_equal( $mol_tree.fromString( "foo bar\n\t\\pol\n\t\\men" ).sub[ 0 ].sub[ 0 ].sub[ 1 ].data , "men" )
-			
-			$mol_assert_equal( $mol_tree.fromString( 'foo bar \\text\n' ).toString() , 'foo bar \\text\n' )
-		} ,
-
-		'inserting'() {
-			$mol_assert_equal( $mol_tree.fromString( 'a b c d' ).insert( new $mol_tree , 'a' , 'b' , 'c' ).toString() , 'a b \\\n' )
-			$mol_assert_equal( $mol_tree.fromString( 'a b' ).insert( new $mol_tree , 'a' , 'b' , 'c' , 'd' ).toString() , 'a b c \\\n' )
-
-			$mol_assert_equal( $mol_tree.fromString( 'a b c d' ).insert( new $mol_tree , 0 , 0 , 0 ).toString() , 'a b \\\n' )
-			$mol_assert_equal( $mol_tree.fromString( 'a b' ).insert( new $mol_tree , 0 , 0 , 0 , 0 ).toString() , 'a b \\\n\t\\\n' )
-
-			$mol_assert_equal( $mol_tree.fromString( 'a b c d' ).insert( new $mol_tree , null , null , null ).toString() , 'a b \\\n' )
-			$mol_assert_equal( $mol_tree.fromString( 'a b' ).insert( new $mol_tree , null , null , null , null ).toString() , 'a b \\\n\t\\\n' )
-		} ,
-
-		'fromJSON'() {
-			$mol_assert_equal( $mol_tree.fromJSON([]).toString() , '/\n' )
-			$mol_assert_equal( $mol_tree.fromJSON([ false , true ]).toString() , '/\n\tfalse\n\ttrue\n' )
-			$mol_assert_equal( $mol_tree.fromJSON([ 0 , 1 , 2.3 ]).toString() , '/\n\t0\n\t1\n\t2.3\n' )
-			$mol_assert_equal( $mol_tree.fromJSON([ '' , 'foo' , 'bar\nbaz' ]).toString() , '/\n\t\\\n\t\\foo\n\t\\\n\t\t\\bar\n\t\t\\baz\n' )
-			$mol_assert_equal( $mol_tree.fromJSON({ 'foo' : false , 'bar\nbaz' : 'lol' }).toString() , '*\n\tfoo false\n\t\\\n\t\t\\bar\n\t\t\\baz\n\t\t\\lol\n' )
-		} ,
-		
-		'toJSON'() {
-			$mol_assert_equal( JSON.stringify( $mol_tree.fromString( '/\n' ).sub[0] ) , '[]' )
-			$mol_assert_equal( JSON.stringify( $mol_tree.fromString( '/\n\tfalse\n\ttrue\n' ).sub[0] ) , '[false,true]' )
-			$mol_assert_equal( JSON.stringify( $mol_tree.fromString( '/\n\t0\n\t1\n\t2.3\n' ).sub[0] ) , '[0,1,2.3]' )
-			$mol_assert_equal( JSON.stringify( $mol_tree.fromString( '/\n\t\\\n\t\\foo\n\t\\\n\t\t\\bar\n\t\t\\baz\n' ).sub[0] ) , '["","foo","bar\\nbaz"]' )
-			$mol_assert_equal( JSON.stringify( $mol_tree.fromString( '*\n\tfoo false\n\t\\\n\t\t\\bar\n\t\t\\baz\n\t\t\\lol\n' ).sub[0] ) , '{"foo":false,"bar\\nbaz":"lol"}' )
-		} ,
-		
-		'hack'() {
-
-			const res = $mol_tree.fromString( `foo bar xxx` ).hack({
-				'' : ( tree , context )=> [ tree.hack( context ) ] ,
-				'bar' : ( tree , context )=> [ tree.hack( context ).clone({ type : '777' }) ] ,
-			})
-
-			$mol_assert_equal( res.toString() , new $mol_tree({ type : 'foo 777 xxx' }).toString() )
-
-		} ,
-
-		'errors handling'( $ ) {
-
-			const errors = [] as string[]
-
-			class Tree extends $mol_tree {
-				static $ = $.$mol_ambient({
-					$mol_fail: error => errors.push( error.message ) as never
-				})
-			}
-			
-			Tree.fromString( `
-				\t \tfoo
-				bar \\data
-			` , 'test' )
-
-			$mol_assert_like( errors , [ 'Syntax error at test:2\n \tfoo' ] )
-
-		},
-
-	} )	
-}
diff --git a/tree/tree.ts b/tree/tree.ts
deleted file mode 100644
index b365274684a..00000000000
--- a/tree/tree.ts
+++ /dev/null
@@ -1,447 +0,0 @@
-namespace $ {
-
-	export const $mol_tree_convert : unique symbol = Symbol( '$mol_tree_convert' )
-	export type $mol_tree_path = Array< string | number | null >
-
-	export type $mol_tree_hack = ( input : $mol_tree , context : $mol_tree_context )=> readonly $mol_tree[]
-	export type $mol_tree_context = Record< string , $mol_tree_hack >
-	export type $mol_tree_library = Record< string , $mol_tree_context >
-	
-	/**
-	 * Abstract Syntax Tree with human readable serialization.
-	 * @see https://github.com/nin-jin/tree.d
-	 */
-	export class $mol_tree extends $mol_object2 {
-		
-		readonly type : string
-		readonly data : string
-		readonly sub : readonly $mol_tree[]
-		readonly baseUri : string
-		readonly row : number
-		readonly col : number
-		readonly length : number
-		
-		constructor( config : Partial<$mol_tree> = {} ) {
-
-			super()
-
-			this.type = config.type || ''
-			
-			if( config.value !== undefined ) {
-
-				var sub = $mol_tree.values( config.value )
-				
-				if( config.type || sub.length > 1 ) {
-
-					this.sub = [ ... sub , ...( config.sub || [] ) ]
-					this.data = config.data || ''
-
-				} else {
-
-					this.data = sub[ 0 ].data
-					this.sub = config.sub || []
-
-				}
-
-			} else {
-				
-				this.data = config.data || ''
-				this.sub = config.sub || []
-
-			}
-			
-			this.baseUri = config.baseUri || ''
-			this.row = config.row || 0
-			this.col = config.col || 0
-			this.length = config.length || 0
-
-		}
-		
-		static values( str : string , baseUri? : string ) {
-
-			return str.split( '\n' ).map( ( data , index ) => new $mol_tree( {
-				data : data ,
-				baseUri : baseUri ,
-				row : index + 1 ,
-				length : data.length ,
-			} ) )
-
-		}
-		
-		/** Cloning node with overrides. */
-		clone( config : Partial<$mol_tree> = {} ) {
-
-			return new $mol_tree({
-				type : ( 'type' in config ) ? config.type : this.type ,
-				data : ( 'data' in config ) ? config.data : this.data ,
-				sub : ( 'sub' in config ) ? config.sub : this.sub ,
-				baseUri : ( 'baseUri' in config ) ? config.baseUri : this.baseUri ,
-				row : ( 'row' in config ) ? config.row : this.row ,
-				col : ( 'col' in config ) ? config.col : this.col ,
-				length : ( 'length' in config ) ? config.length : this.length ,
-				value : config.value
-			})
-
-		}
-		
-		/** Makes new derived node. */
-		make( config : Partial<$mol_tree> ) {
-
-			return new $mol_tree({
-				baseUri : this.baseUri ,
-				row : this.row ,
-				col : this.col ,
-				length : this.length ,
-				... config ,
-			})
-
-		}
-		
-		/** Makes new derived data node. */
-		make_data( value : string , sub? : readonly $mol_tree[] ) {
-			return this.make({ value , sub })
-		}
-		
-		/** Makes new derived structural node. */
-		make_struct( type : string , sub? : readonly $mol_tree[] ) {
-			return this.make({ type , sub })
-		}
-		
-		/** Parses tree format to AST. */
-		static fromString( str : string , baseUri? : string ) {
-			
-			var root = new $mol_tree( { baseUri : baseUri } )
-			var stack = [ root ]
-			
-			var row = 0
-			var prefix = str.replace( /^\n?(\t*)[\s\S]*/ , '$1' )
-			var lines = str.replace( new RegExp( '^\\t{0,' + prefix.length + '}' , 'mg' ) , '' ).split( '\n' )
-
-			lines.forEach( line => {
-
-				++row
-				
-				var chunks = /^(\t*)((?:[^\n\t\\ ]+ *)*)(\\[^\n]*)?(.*?)(?:$|\n)/m.exec( line )
-				if( !chunks || chunks[4] ) return this.$.$mol_fail( new Error( `Syntax error at ${baseUri}:${row}\n${line}` ) )
-				
-				var indent = chunks[ 1 ]
-				var path = chunks[ 2 ]
-				var data = chunks[ 3 ]
-				
-				var deep = indent.length
-				var types = path ? path.replace( / $/ , '' ).split( / +/ ) : []
-				
-				if( stack.length <= deep ) return this.$.$mol_fail( new Error( `Too many tabs at ${baseUri}:${row}\n${line}` ) )
-				
-				stack.length = deep + 1
-				var parent = stack[ deep ];
-				
-				let col = deep
-				types.forEach( type => {
-					if( !type ) return this.$.$mol_fail( new Error( `Unexpected space symbol ${baseUri}:${row}\n${line}` ) )
-					var next = new $mol_tree({ type , baseUri , row , col , length : type.length })
-					const parent_sub = parent.sub as $mol_tree[]
-					parent_sub.push( next )	
-					parent = next
-					col += type.length + 1
-				} )
-				
-				if( data ) {
-					var next = new $mol_tree({ data : data.substring( 1 ) , baseUri , row , col , length : data.length })
-					const parent_sub = parent.sub as $mol_tree[]
-					parent_sub.push( next )
-					parent = next
-				}
-				
-				stack.push( parent )
-				
-			} )
-			
-			return root
-		}
-		
-		/**
-		 * Parses json.tree lang to AST.
-		 * @todo Move to $mol_tree_json_from
-		 */
-		static fromJSON( json : any , baseUri = '' ) : $mol_tree {
-
-			switch( true ) {
-
-				case typeof json === 'boolean' :
-				case typeof json === 'number' :
-				case json === null :
-
-					return new $mol_tree({
-						type : String( json ) ,
-						baseUri : baseUri
-					})
-				
-				case typeof json === 'string' :
-
-					return new $mol_tree({
-						value : json ,
-						baseUri : baseUri
-					})
-
-				case Array.isArray( json ) :
-
-					return new $mol_tree({
-						type : "/" ,
-						sub : ( json as any[] ).map( json => $mol_tree.fromJSON( json , baseUri ) )
-					})
-
-				case json instanceof Date :
-
-					return new $mol_tree({
-						value : json.toISOString() ,
-						baseUri : baseUri
-					})
-				
-				default :
-
-					if( typeof json[ $mol_tree_convert ] === 'function' ) {
-						return json[ $mol_tree_convert ]()
-					}
-
-					if( typeof json.toJSON === 'function' ) {
-						return $mol_tree.fromJSON( json.toJSON() )
-					}
-
-					if( json instanceof Error ) {
-						const { name , message , stack } = json
-						json = { ... json , name , message ,  stack }
-					}
-
-					var sub : $mol_tree[] = []
-					
-					for( var key in json ) {
-
-						if( json[ key ] === undefined ) continue
-
-						const subsub = $mol_tree.fromJSON( json[ key ] , baseUri )
-						
-						if( /^[^\n\t\\ ]+$/.test( key ) ) {
-
-							var child = new $mol_tree({
-								type : key ,
-								baseUri : baseUri ,
-								sub : [ subsub ] ,
-							} )
-							
-						} else {
-							
-							var child = new $mol_tree({
-								value : key ,
-								baseUri : baseUri ,
-								sub : [ subsub ] ,
-							} )
-
-						}
-
-						sub.push( child )
-						
-					}
-					
-					return new $mol_tree({
-						type : "*" ,
-						sub : sub ,
-						baseUri : baseUri
-					})
-				
-			}
-
-		}
-		
-		get uri() {
-			return this.baseUri + '#' + this.row + ':' + this.col
-		}
-		
-		/** Serializas to tree format. */
-		toString( prefix = '' ) : string {
-			var output = ''
-			
-			if( this.type.length ) {
-				if( !prefix.length ) {
-					prefix = "\t";
-				}
-				output += this.type
-				if( this.sub.length == 1 ) {
-					return output + ' ' + this.sub[ 0 ].toString( prefix )
-				}
-				output += "\n"
-			} else if( this.data.length || prefix.length ) {
-				output += "\\" + this.data + "\n"
-			}
-
-			for( var child of this.sub ) {
-				output += prefix
-				output += child.toString( prefix + "\t" )
-			}
-			
-			return output
-		}
-		
-		/**
-		 * Serializes AST to json.tree lang.
-		 * @todo Move to $mol_tree_json_to
-		 */
-		toJSON() : any {
-			if( !this.type ) return this.value
-			
-			if( this.type === 'true' ) return true
-			if( this.type === 'false' ) return false
-			if( this.type === 'null' ) return null
-			
-			if( this.type === '*' ) {
-				var obj = {}
-				for( var child of this.sub ) {
-					if( child.type === '-' ) continue
-					var key = child.type || child.clone({ sub : child.sub.slice( 0 , child.sub.length - 1 ) }).value
-					var val = child.sub[ child.sub.length - 1 ].toJSON()
-					if( val !== undefined ) ( obj as any )[ key ] = val
-				}
-				return obj
-			}
-			
-			if( this.type === '/' ) {
-				var res : any[] = []
-				this.sub.forEach(
-					child => {
-						if( child.type === '-' ) return
-						var val = child.toJSON()
-						if( val !== undefined ) res.push( val )
-					}
-				)
-				return res
-			}
-			
-			if( this.type === 'time' ) {
-				return new Date( this.value )
-			}
-			
-			const numb = Number( this.type ) 
-			if( !Number.isNaN( numb ) || this.type === 'NaN' ) return numb
-			
-			throw new Error( `Unknown type (${this.type}) at ${this.uri}` )
-		}
-		
-		get value() {
-			var values : string[] = []
-			for( var child of this.sub ) {
-				if( child.type ) continue
-				values.push( child.value )
-			}
-			return this.data + values.join( "\n" )
-		}
-		
-		/** Makes new tree with node overrided by path. */
-		insert( value : $mol_tree , ...path : $mol_tree_path ) : $mol_tree {
-			if( path.length === 0 ) return value
-			
-			const type = path[0]
-			if( typeof type === 'string' ) {
-
-				let replaced = false
-				const sub = this.sub.map( ( item , index )=> {
-					if( item.type !== type ) return item
-					replaced = true
-					return item.insert( value , ... path.slice( 1 ) )
-				} )
-				
-				if( !replaced ) sub.push( new $mol_tree({ type }).insert( value , ... path.slice( 1 ) ) )
-				
-				return this.clone({ sub })
-
-			} else if( typeof type === 'number' ) {
-				
-				const sub = this.sub.slice()
-				sub[ type ] = ( sub[ type ] || new $mol_tree ).insert( value , ... path.slice( 1 ) )
-				
-				return this.clone({ sub })
-
-			} else {
-				
-				return this.clone({ sub : ( ( this.sub.length === 0 ) ? [ new $mol_tree() ] : this.sub ).map( item => item.insert( value , ... path.slice( 1 ) ) ) })
-
-			}
-		}
-
-		/** Query nodes by path. */
-		select( ...path : $mol_tree_path ) {
-			var next = [ this as $mol_tree ]
-			for( var type of path ) {
-				if( !next.length ) break
-				var prev = next
-				next = []
-
-				for( var item of prev ) {
-
-					switch( typeof( type ) ) {
-
-						case 'string' :
-							for( var child of item.sub ) {
-								if( !type || ( child.type == type ) ) {
-									next.push( child )
-								}
-							}
-							break;
-						
-						case 'number' :
-							if( type < item.sub.length ) next.push( item.sub[ type ] )
-							break;
-						
-						default : next.push( ... item.sub )
-					}
-				}
-			}
-			return new $mol_tree( { sub : next } )
-		}
-		
-		/** Filter subnodes by path or value. */
-		filter( path : string[] , value? : string ) {
-			var sub = this.sub.filter(
-				function( item ) {
-					
-					var found = item.select( ...path )
-					
-					if( value == null ) {
-						return Boolean( found.sub.length )
-					} else {
-						return found.sub.some( child => child.value == value )
-					}
-				}
-			)
-			
-			return new $mol_tree( { sub : sub } )
-		}
-
-		/** @deprecated Use $mol_tree:hack */
-		transform( visit : ( stack : $mol_tree[] , sub : ()=> $mol_tree[] )=> $mol_tree | null , stack : $mol_tree[] = [] ) : $mol_tree | null {
-			const sub_stack = [ this , ...stack ]
-			return visit( sub_stack , ()=> this.sub.map( node => node.transform( visit , sub_stack ) ).filter( n => n ) as $mol_tree[] )
-		}
-
-		/** Transform tree through context with transformers */
-		hack( context : $mol_tree_context ) : $mol_tree {
-			
-			const sub = ( [] as $mol_tree[] ).concat( ... this.sub.map( child => {
-
-				const handle = context[ child.type ] || context[ '' ]
-				if( !handle ) $mol_fail( child.error( 'Handler not defined' ) )
-				
-				return handle( child , context )
-
-			} ) )
-
-			return this.clone({ sub })
-		}
-
-		/** Makes Error with node coordinates. */
-		error( message : string ) {
-			return new Error( `${message}:\n${ this } ${this.baseUri}:${this.row}:${this.col}` )
-		}
-
-	}
-	
-}