diff --git a/build.zig b/build.zig
index f0d8d51..b67031e 100644
--- a/build.zig
+++ b/build.zig
@@ -14,10 +14,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    const tree_sitter_host_dep = b.dependency("tree_sitter", .{
-        .target = b.graph.host,
-        .optimize = optimize,
-    });
+    const tree_sitter_host_dep = b.dependency("tree_sitter", .{});
 
     const cbor_dep = b.dependency("cbor", .{
         .target = target,
@@ -26,8 +23,11 @@ pub fn build(b: *std.Build) void {
 
     const ts_bin_query_gen = b.addExecutable(.{
         .name = "ts_bin_query_gen",
-        .target = b.graph.host,
-        .root_source_file = b.path("src/ts_bin_query_gen.zig"),
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("src/ts_bin_query_gen.zig"),
+            .target = b.graph.host,
+            .optimize = .Debug,
+        }),
     });
     ts_bin_query_gen.linkLibC();
     ts_bin_query_gen.root_module.addImport("cbor", cbor_dep.module("cbor"));
@@ -110,6 +110,7 @@ pub fn build(b: *std.Build) void {
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/commonlisp/highlights.scm");
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/latex/highlights.scm");
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/hcl/highlights.scm");
+    ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/rst/highlights.scm");
 
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "queries/cmake/injections.scm");
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "tree-sitter-astro/queries/injections.scm");
@@ -148,6 +149,7 @@ pub fn build(b: *std.Build) void {
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/commonlisp/injections.scm");
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/latex/injections.scm");
     ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/hcl/injections.scm");
+    ts_queryfile(b, tree_sitter_dep, ts_bin_query_gen, "nvim-treesitter/queries/rst/injections.scm");
 
     const syntax_mod = b.addModule("syntax", .{
         .root_source_file = b.path("src/syntax.zig"),
diff --git a/build.zig.zon b/build.zig.zon
index d96221e..4b99238 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -1,17 +1,17 @@
 .{
     .name = .flow_syntax,
-    .version = "0.1.0",
+    .version = "0.6.0",
     .fingerprint = 0x3ba2584ea1cec85f,
-    .minimum_zig_version = "0.14.1",
+    .minimum_zig_version = "0.15.0",
 
     .dependencies = .{
         .tree_sitter = .{
-            .url = "https://github.com/neurocyte/tree-sitter/releases/download/zig-0.14-36eca46fdfe00a53056c8d84e1628f55a25048bb/source.tar.gz",
-            .hash = "N-V-__8AAMF_rS6BaLxN8oA8RJ8DUNN8xZr5718FlLxN-fFO",
+            .url = "https://github.com/neurocyte/tree-sitter/releases/download/master-3cfb01c2f3349791a500f59bcc89b867d017d5b8/source.tar.gz",
+            .hash = "tree_sitter-0.22.4-150-g7e3f5726-z0LhyI7XuS7mSbx26jCz5VkJ_c1oL8vvC6WBgx0Idkpg",
         },
         .cbor = .{
-            .url = "https://github.com/neurocyte/cbor/archive/1fccb83c70cd84e1dff57cc53f7db8fb99909a94.tar.gz",
-            .hash = "cbor-1.0.0-RcQE_HvqAACcrLH7t3IDZOshgY2xqJA_UX330MvwSepb",
+            .url = "git+https://github.com/neurocyte/cbor?ref=master#7d2eeb68c8a2fb3f4d6baad6cc04c521b92974c0",
+            .hash = "cbor-1.0.0-RcQE_AswAQAPlqBCZXYQf9DZXn-0Ubt8Mk03ZcJWcsAG",
         },
     },
     .paths = .{
diff --git a/src/file_type.zig b/src/file_type.zig
index bcc28fa..212c6ff 100644
--- a/src/file_type.zig
+++ b/src/file_type.zig
@@ -85,7 +85,7 @@ fn ft_func_name(comptime lang: []const u8) []const u8 {
     return &func_name;
 }
 
-pub const LangFn = *const fn () callconv(.C) ?*const treez.Language;
+pub const LangFn = *const fn () callconv(.c) ?*const treez.Language;
 
 pub const FirstLineMatch = struct {
     prefix: ?[]const u8 = null,
diff --git a/src/file_types.zig b/src/file_types.zig
index 294d8b8..8bd7055 100644
--- a/src/file_types.zig
+++ b/src/file_types.zig
@@ -325,7 +325,7 @@ pub const markdown = .{
     .description = "Markdown",
     .color = 0x000000,
     .icon = "󰍔",
-    .extensions = .{"md"},
+    .extensions = .{"md", "smd"},
     .comment = "<!--",
     .highlights = "tree-sitter-markdown/tree-sitter-markdown/queries/highlights.scm",
     .injections = "tree-sitter-markdown/tree-sitter-markdown/queries/injections.scm",
@@ -512,6 +512,14 @@ pub const rpmspec = .{
     .comment = "#",
 };
 
+pub const rst = .{
+    .description = "reStructuredText",
+    .extensions = .{"rst"},
+    .comment = "..",
+    .highlights = "nvim-treesitter/queries/rst/highlights.scm",
+    .injections = "nvim-treesitter/queries/rst/injections.scm",
+};
+
 pub const ruby = .{
     .description = "Ruby",
     .color = 0xd91404,
@@ -558,7 +566,7 @@ pub const swift = .{
 
 pub const verilog = .{
     .description = "SystemVerilog",
-    .extensions = .{ "sv", "svh" },
+    .extensions = .{ "sv", "svh", "v", "vh" },
     .comment = "//",
     .highlights = "nvim-treesitter/queries/verilog/highlights.scm",
     .injections = "nvim-treesitter/queries/verilog/injections.scm",
@@ -646,7 +654,7 @@ pub const @"ziggy-schema" = .{
     .description = "Ziggy (schema)",
     .color = 0xf7a41d,
     .icon = "",
-    .extensions = .{ "ziggy-schema", "zyg-schema" },
+    .extensions = .{ "ziggy-schema", "zgy-schema" },
     .comment = "//",
     .highlights = "tree-sitter-ziggy/tree-sitter-ziggy-schema/queries/highlights.scm",
 };
diff --git a/src/syntax.zig b/src/syntax.zig
index 8404849..ec15373 100644
--- a/src/syntax.zig
+++ b/src/syntax.zig
@@ -48,12 +48,12 @@ pub fn create(file_type: FileType, allocator: std.mem.Allocator, query_cache: *Q
     return self;
 }
 
-pub fn static_create_file_type(allocator: std.mem.Allocator, lang_name: []const u8, query_cache: *QueryCache) !*Self {
+pub fn create_file_type_static(allocator: std.mem.Allocator, lang_name: []const u8, query_cache: *QueryCache) !*Self {
     const file_type = FileType.get_by_name_static(lang_name) orelse return error.NotFound;
     return create(file_type, allocator, query_cache);
 }
 
-pub fn static_create_guess_file_type_static(allocator: std.mem.Allocator, content: []const u8, file_path: ?[]const u8, query_cache: *QueryCache) !*Self {
+pub fn create_guess_file_type_static(allocator: std.mem.Allocator, content: []const u8, file_path: ?[]const u8, query_cache: *QueryCache) !*Self {
     const file_type = FileType.guess_static(file_path, content) orelse return error.NotFound;
     return create(file_type, allocator, query_cache);
 }
@@ -102,7 +102,7 @@ pub fn refresh_from_buffer(self: *Self, buffer: anytype, metrics: anytype) !void
     const input: Input = .{
         .payload = &state,
         .read = struct {
-            fn read(payload: ?*anyopaque, _: u32, position: treez.Point, bytes_read: *u32) callconv(.C) [*:0]const u8 {
+            fn read(payload: ?*anyopaque, _: u32, position: treez.Point, bytes_read: *u32) callconv(.c) [*:0]const u8 {
                 const ctx: *State = @ptrCast(@alignCast(payload orelse return ""));
                 const result = ctx.buffer.get_from_pos(.{ .row = position.row, .col = position.column }, &ctx.result_buf, ctx.metrics);
                 bytes_read.* = @intCast(result.len);
@@ -128,7 +128,7 @@ pub fn refresh_from_string(self: *Self, content: [:0]const u8) !void {
     const input: Input = .{
         .payload = &state,
         .read = struct {
-            fn read(payload: ?*anyopaque, _: u32, position: treez.Point, bytes_read: *u32) callconv(.C) [*:0]const u8 {
+            fn read(payload: ?*anyopaque, _: u32, position: treez.Point, bytes_read: *u32) callconv(.c) [*:0]const u8 {
                 bytes_read.* = 0;
                 const ctx: *State = @ptrCast(@alignCast(payload orelse return ""));
                 const pos = (find_line_begin(ctx.content, position.row) orelse return "") + position.column;
diff --git a/src/treez_dummy.zig b/src/treez_dummy.zig
index b73b1f4..e66f06b 100644
--- a/src/treez_dummy.zig
+++ b/src/treez_dummy.zig
@@ -23,12 +23,12 @@ pub const InputEncoding = enum(c_uint) {
 };
 pub const Input = extern struct {
     payload: ?*anyopaque,
-    read: ?*const fn (payload: ?*anyopaque, byte_index: u32, position: Point, bytes_read: *u32) callconv(.C) [*:0]const u8,
+    read: ?*const fn (payload: ?*anyopaque, byte_index: u32, position: Point, bytes_read: *u32) callconv(.c) [*:0]const u8,
     encoding: InputEncoding,
 };
 pub const Language = struct {
     var dummy: @This() = .{};
-    pub fn LangFn() callconv(.C) ?*const Language {
+    pub fn LangFn() callconv(.c) ?*const Language {
         return &dummy;
     }
 };
@@ -87,6 +87,7 @@ pub const Tree = struct {
     pub fn edit(_: *Tree, _: *const InputEdit) void {}
 };
 pub const Node = struct {
+    tree: ?*Tree = null,
     var dummy: @This() = .{};
     pub fn getRange(_: *const @This()) Range {
         return .{};
diff --git a/src/ts_bin_query_gen.zig b/src/ts_bin_query_gen.zig
index e32c6ef..a618a58 100644
--- a/src/ts_bin_query_gen.zig
+++ b/src/ts_bin_query_gen.zig
@@ -25,9 +25,8 @@ pub fn main() anyerror!void {
     };
     defer output_file.close();
 
-    var output = std.ArrayList(u8).init(allocator);
-    defer output.deinit();
-    const writer = output.writer();
+    var output = std.Io.Writer.Allocating.init(allocator);
+    const writer = &output.writer;
 
     try cbor.writeMapHeader(writer, file_types.len);
 
@@ -38,7 +37,7 @@ pub fn main() anyerror!void {
         try cbor.writeMapHeader(writer, if (file_type.injections) |_| 3 else 2);
 
         const highlights_in = try treez.Query.create(lang, file_type.highlights);
-        const ts_highlights_in: *tss.TSQuery = @alignCast(@ptrCast(highlights_in));
+        const ts_highlights_in: *tss.TSQuery = @ptrCast(@alignCast(highlights_in));
 
         const highlights_cb = try tss.toCbor(ts_highlights_in, allocator);
         defer allocator.free(highlights_cb);
@@ -49,7 +48,7 @@ pub fn main() anyerror!void {
             std.log.info("file_type {s} highlights {d} bytes", .{ file_type.name, highlights_cb.len });
 
         const errors_in = try treez.Query.create(lang, "(ERROR) @error");
-        const ts_errors_in: *tss.TSQuery = @alignCast(@ptrCast(errors_in));
+        const ts_errors_in: *tss.TSQuery = @ptrCast(@alignCast(errors_in));
 
         const errors_cb = try tss.toCbor(ts_errors_in, allocator);
         defer allocator.free(errors_cb);
@@ -61,7 +60,7 @@ pub fn main() anyerror!void {
 
         if (file_type.injections) |injections| {
             const injections_in = try treez.Query.create(lang, injections);
-            const ts_injections_in: *tss.TSQuery = @alignCast(@ptrCast(injections_in));
+            const ts_injections_in: *tss.TSQuery = @ptrCast(@alignCast(injections_in));
 
             const injections_cb = try tss.toCbor(ts_injections_in, allocator);
             defer allocator.free(injections_cb);
@@ -73,9 +72,9 @@ pub fn main() anyerror!void {
         }
     }
 
-    try output_file.writeAll(output.items);
+    try output_file.writeAll(output.written());
     if (verbose)
-        std.log.info("file_types total {d} bytes", .{output.items.len});
+        std.log.info("file_types total {d} bytes", .{output.written().len});
 }
 
 fn fatal(comptime format: []const u8, args: anytype) noreturn {
@@ -91,7 +90,7 @@ const FileType = struct {
     highlights: [:0]const u8,
     injections: ?[:0]const u8,
 };
-const LangFn = *const fn () callconv(.C) ?*const treez.Language;
+const LangFn = *const fn () callconv(.c) ?*const treez.Language;
 
 fn load_file_types(comptime Namespace: type) []const FileType {
     comptime switch (@typeInfo(Namespace)) {
diff --git a/src/ts_serializer.zig b/src/ts_serializer.zig
index 928f60b..02c6daa 100644
--- a/src/ts_serializer.zig
+++ b/src/ts_serializer.zig
@@ -5,6 +5,7 @@
 /// Yes,... it is not a public API! Here be dragons!
 ///
 const std = @import("std");
+const Io = std.Io;
 const cbor = @import("cbor");
 const build_options = @import("build_options");
 const treez = if (build_options.use_tree_sitter) @import("treez") else @import("treez_dummy.zig");
@@ -13,7 +14,7 @@ pub const Slice = extern struct {
     offset: u32,
     length: u32,
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -31,7 +32,7 @@ pub fn Array(T: type) type {
         size: u32,
         capacity: u32,
 
-        pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+        pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
             if (self.contents) |contents| {
                 const arr: []T = @as([*]T, @ptrCast(contents))[0..self.size];
                 try cbor.writeValue(writer, arr);
@@ -53,7 +54,7 @@ pub fn Array(T: type) type {
             if (T == u8) {
                 var arr: []const u8 = undefined;
                 if (try cbor.matchValue(iter, cbor.extract(&arr))) {
-                    self.contents = @constCast(@ptrCast(arr.ptr));
+                    self.contents = @ptrCast(@constCast(arr.ptr));
                     self.size = @intCast(arr.len);
                     self.capacity = @intCast(arr.len);
                     return true;
@@ -74,7 +75,7 @@ pub fn Array(T: type) type {
                 }
                 i += 1;
             }
-            self.contents = @constCast(@ptrCast(arr.ptr));
+            self.contents = @ptrCast(@constCast(arr.ptr));
             self.size = @intCast(arr.len);
             self.capacity = @intCast(arr.len);
             return true;
@@ -86,7 +87,7 @@ pub const SymbolTable = extern struct {
     characters: Array(u8),
     slices: Array(Slice),
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -103,7 +104,7 @@ pub const PatternEntry = extern struct {
     pattern_index: u16,
     is_rooted: bool,
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -122,7 +123,7 @@ pub const QueryPattern = extern struct {
     end_byte: u32,
     is_non_local: bool,
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -140,7 +141,7 @@ pub const StepOffset = extern struct {
     byte_offset: u32,
     step_index: u16,
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -177,7 +178,7 @@ pub const QueryStep = extern struct {
     // parent_pattern_guaranteed: u1,
     flags16: u8,
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -206,7 +207,7 @@ pub const PredicateStep = extern struct {
     type: Type,
     value_id: u32,
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -234,7 +235,7 @@ pub const TSQuery = extern struct {
     // language: ?*const treez.Language,
     wildcard_root_pattern_count: u16,
 
-    pub fn cborEncode(self: *const @This(), writer: anytype) !void {
+    pub fn cborEncode(self: *const @This(), writer: *Io.Writer) !void {
         return cbor.writeArray(writer, self.*);
     }
 
@@ -262,13 +263,14 @@ pub const TSQuery = extern struct {
 pub const SerializeError = error{OutOfMemory};
 
 pub fn toCbor(query: *TSQuery, allocator: std.mem.Allocator) SerializeError![]const u8 {
-    var cb: std.ArrayListUnmanaged(u8) = .empty;
-    defer cb.deinit(allocator);
-    try cbor.writeValue(cb.writer(allocator), query.*);
-    return cb.toOwnedSlice(allocator);
+    var cb: Io.Writer.Allocating = .init(allocator);
+    defer cb.deinit();
+    cbor.writeValue(&cb.writer, query.*) catch return error.OutOfMemory;
+    return cb.toOwnedSlice();
 }
 
 pub const DeserializeError = error{
+    WriteFailed,
     OutOfMemory,
     IntegerTooLarge,
     IntegerTooSmall,
@@ -277,6 +279,8 @@ pub const DeserializeError = error{
     InvalidFloatType,
     InvalidArrayType,
     InvalidPIntType,
+    InvalidMapType,
+    InvalidUnion,
     JsonIncompatibleType,
     InvalidQueryCbor,
     NotAnObject,