diff --git a/parser/decoders/decoder.go b/parser/decoders/decoder.go
index 73a4b6b..2526608 100644
--- a/parser/decoders/decoder.go
+++ b/parser/decoders/decoder.go
@@ -20,21 +20,27 @@ func ParseBlock(input string, block template.Block) (any, error) {
 	case template.CodecHashtags:
 		return Keywords(input, block)
 	}
-	return nil, fmt.Errorf("unknown codec: %s", block.Codec)
+	fmt.Printf("%#v\n", block)
+	return nil, fmt.Errorf("unknown codec '%s'", block.Codec)
 }
 
 func Parse(matches []matcher.Block) (any, error) {
 	var result any
 
-	for _, m := range matches {
+	for i, m := range matches {
 		if m.Block.Path == "@index" {
 			continue
 		}
 
 		input := m.GetContent()
 		value, err := ParseBlock(input, m.Block)
+		var blockIdentifier any
+		blockIdentifier = m.Block.Path
+		if blockIdentifier == "" {
+			blockIdentifier = fmt.Sprintf("#%d", i)
+		}
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse block(%s): %w", m.Block.Path, err)
+			return nil, fmt.Errorf("failed to parse block(%s) -> %w", blockIdentifier, err)
 		}
 		result = utils.SetPathValue(m.Block.Path, value, result)
 	}
diff --git a/parser/matcher/matcher.go b/parser/matcher/matcher.go
index 55e506d..b6d6f37 100644
--- a/parser/matcher/matcher.go
+++ b/parser/matcher/matcher.go
@@ -50,7 +50,6 @@ func MatchBlocksFuzzy(markdown string, templateBlocks []template.Block, maxDist
 		}
 	}
 
-	// Handle the last block
 	if len(templateBlocks) > 0 {
 		lastBlock := templateBlocks[len(templateBlocks)-1]
 		if lastBlock.Type == template.DataBlock {
diff --git a/parser/matcher/matcher_test.go b/parser/matcher/matcher_test.go
index 8969889..eb2ba4e 100644
--- a/parser/matcher/matcher_test.go
+++ b/parser/matcher/matcher_test.go
@@ -10,7 +10,7 @@ import (
 	"git.max-richter.dev/max/marka/testdata"
 )
 
-func TestFuzzyFindAll(t *testing.T) {
+func TestMatch_FuzzyFindAll(t *testing.T) {
 	recipeMd := testdata.Read(t, "baguette/input.md")
 
 	tests := []struct {
@@ -36,13 +36,14 @@ func TestFuzzyFindAll(t *testing.T) {
 	}
 }
 
-func TestFuzzyBlockMatch(t *testing.T) {
+func TestMatch_FuzzyBlockBaguette(t *testing.T) {
 	recipeMd := testdata.Read(t, "baguette/input.md")
 	schemaMd, err := registry.GetTemplate("Recipe")
 	if err != nil {
 		t.Errorf("Failed to load template: %s", err.Error())
 		t.FailNow()
 	}
+
 	blocks, err := template.CompileTemplate(schemaMd)
 	if err != nil {
 		t.Errorf("Failed to compile template: %s", err.Error())
@@ -51,9 +52,8 @@ func TestFuzzyBlockMatch(t *testing.T) {
 
 	matches := matcher.MatchBlocksFuzzy(string(recipeMd), blocks, 0.3)
 
-	for _, b := range blocks {
-		fmt.Printf("Block: %+v\n", b)
-		fmt.Printf("Content: '%q'\n\n", b.GetContent())
+	for _, m := range matches {
+		fmt.Printf("Content: '%s'->'%q'\n\n", m.Block.Path, m.GetContent())
 	}
 
 	expected := []struct {
@@ -66,10 +66,7 @@ func TestFuzzyBlockMatch(t *testing.T) {
 			value: "Baguette",
 		},
 		{
-			value: "\nMy favourite baguette recipe",
-		},
-		{
-			value: "",
+			value: "My favourite baguette recipe",
 		},
 		{
 			value: "- Flour\n- Water\n- Salt",
@@ -87,11 +84,10 @@ func TestFuzzyBlockMatch(t *testing.T) {
 		if expected[i].value != m.GetContent() {
 			t.Errorf("Match %d did not match expected: %q", i, expected[i].value)
 		}
-		fmt.Printf("match: %s->%q\n", m.Block.Path, m.GetContent())
 	}
 }
 
-func TestFuzzyBlockMatchSalad(t *testing.T) {
+func TestMatch_FuzzyBlockSalad(t *testing.T) {
 	recipeMd := testdata.Read(t, "recipe_salad/input.md")
 	schemaMd, err := registry.GetTemplate("Recipe")
 	if err != nil {
@@ -115,9 +111,6 @@ func TestFuzzyBlockMatchSalad(t *testing.T) {
 		{
 			value: "Simple Salad",
 		},
-		{
-			value: "#healthy #salad",
-		},
 		{
 			value: "A quick green salad.",
 		},
diff --git a/parser/parser.go b/parser/parser.go
index ce71ee5..2bf5c01 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -5,7 +5,6 @@ package parser
 import (
 	"fmt"
 	"strings"
-	"time"
 
 	"git.max-richter.dev/max/marka/parser/decoders"
 	"git.max-richter.dev/max/marka/parser/matcher"
@@ -53,79 +52,33 @@ func MatchBlocks(markdownContent, templateContent string) ([]matcher.Block, erro
 }
 
 func ParseFile(markdownContent string) (any, error) {
-	timings := make(map[string]int64)
-
-	startDetectType := time.Now()
-	markdownContent = strings.TrimSuffix(markdownContent, "\n")
-
 	contentType, err := DetectType(markdownContent)
 	if err != nil {
 		return nil, fmt.Errorf("could not detect type -> %w", err)
 	}
-	timings["detect_type"] = time.Since(startDetectType).Milliseconds()
 
-	startGetTemplate := time.Now()
 	templateContent, err := registry.GetTemplate(contentType)
 	if err != nil {
-		return nil, fmt.Errorf("could not get schema -> %w", err)
-	}
-	timings["get_template"] = time.Since(startGetTemplate).Milliseconds()
-
-	startTemplate := time.Now()
-	tpl, err := template.CompileTemplate(templateContent)
-	if err != nil {
-		return nil, fmt.Errorf("failed to compile template -> %w", err)
-	}
-	timings["template_compilation"] = time.Since(startTemplate).Milliseconds()
-
-	startMarkdown := time.Now()
-	blocks := matcher.MatchBlocksFuzzy(markdownContent, tpl, 0.3)
-
-	fmt.Println("Blocks: ", len(blocks))
-	for i, b := range blocks {
-		fmt.Printf("Block %d %+v\n", i, b)
-		fmt.Printf("Content %d: %q\n\n", i, b.GetContent())
+		return nil, fmt.Errorf("could not get template -> %w", err)
 	}
 
-	result, err := decoders.Parse(blocks)
-	if err != nil {
-		return nil, fmt.Errorf("failed to parse blocks -> %w", err)
-	}
-	timings["markdown_parsing"] = time.Since(startMarkdown).Milliseconds()
-
-	response := map[string]any{
-		"data":    result,
-		"timings": timings,
-	}
-
-	return response, nil
+	return ParseFileWithTemplate(markdownContent, templateContent)
 }
 
 func ParseFileWithTemplate(markdownContent string, templateContent string) (any, error) {
-	timings := make(map[string]int64)
-
-	startTemplate := time.Now()
 	markdownContent = strings.TrimSuffix(markdownContent, "\n")
 
 	tpl, err := template.CompileTemplate(templateContent)
 	if err != nil {
 		return nil, fmt.Errorf("failed to compile template -> %w", err)
 	}
-	timings["template_compilation"] = time.Since(startTemplate).Milliseconds()
 
-	startMarkdown := time.Now()
 	blocks := matcher.MatchBlocksFuzzy(markdownContent, tpl, 0.3)
 
 	result, err := decoders.Parse(blocks)
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse blocks -> %w", err)
-	}
-	timings["markdown_parsing"] = time.Since(startMarkdown).Milliseconds()
-
-	response := map[string]any{
-		"data":    result,
-		"timings": timings,
+		return nil, fmt.Errorf("failed to compile blocks -> %w", err)
 	}
 
-	return response, nil
+	return result, nil
 }
diff --git a/parser/parser_test.go b/parser/parser_test.go
index 48b092f..83fe310 100644
--- a/parser/parser_test.go
+++ b/parser/parser_test.go
@@ -9,7 +9,30 @@ import (
 	"github.com/google/go-cmp/cmp"
 )
 
-func TestParseRecipe_Golden(t *testing.T) {
+func TestParse_DetectType(t *testing.T) {
+	recipe := testdata.Read(t, "recipe_salad/input.md")
+	article := testdata.Read(t, "article_simple/input.md")
+
+	recipeType, err := parser.DetectType(string(recipe))
+	if err != nil {
+		t.Fatalf("failed to detect recipeType: %v", err)
+	}
+
+	articleType, err := parser.DetectType(string(article))
+	if err != nil {
+		t.Fatalf("failed to detect articleType: %v", err)
+	}
+
+	if recipeType != "Recipe" {
+		t.Errorf("recipeType did not match expected type 'Recipe' -> %s", recipeType)
+	}
+
+	if articleType != "Article" {
+		t.Errorf("articleType did not match expected type 'Article' -> %s", articleType)
+	}
+}
+
+func TestParse_RecipeSalad(t *testing.T) {
 	inputContent := testdata.Read(t, "recipe_salad/input.md")
 	output := testdata.Read(t, "recipe_salad/output.json")
 
@@ -18,19 +41,17 @@ func TestParseRecipe_Golden(t *testing.T) {
 		t.Fatalf("ParseFile: %v", err)
 	}
 
-	gotMap := got.(map[string]any)
-
 	var want map[string]any
 	if err := json.Unmarshal(output, &want); err != nil {
 		t.Fatalf("unmarshal expected.json: %v", err)
 	}
 
-	if diff := cmp.Diff(want, gotMap["data"]); diff != "" {
+	if diff := cmp.Diff(want, got); diff != "" {
 		t.Fatalf("JSON mismatch (-want +got):\n%s", diff)
 	}
 }
 
-func TestParseRecipe_NoDescription(t *testing.T) {
+func TestParse_RecipeNoDescription(t *testing.T) {
 	inputContent := testdata.Read(t, "recipe_no_description/input.md")
 
 	got, err := parser.ParseFile(string(inputContent))
@@ -49,7 +70,7 @@ func TestParseRecipe_NoDescription(t *testing.T) {
 	}
 }
 
-func TestParseRecipe_Baguette(t *testing.T) {
+func TestParse_Baguette(t *testing.T) {
 	inputContent := testdata.Read(t, "baguette/input.md")
 
 	got, err := parser.ParseFile(string(inputContent))
@@ -68,7 +89,7 @@ func TestParseRecipe_Baguette(t *testing.T) {
 	}
 }
 
-func TestParseArticle_Simple(t *testing.T) {
+func TestParse_Article(t *testing.T) {
 	inputContent := testdata.Read(t, "article_simple/input.md")
 
 	got, err := parser.ParseFile(string(inputContent))
diff --git a/playground/src/app.d.ts b/playground/src/app.d.ts
index da08e6d..47ac7b0 100644
--- a/playground/src/app.d.ts
+++ b/playground/src/app.d.ts
@@ -8,6 +8,23 @@ declare global {
 		// interface PageState {}
 		// interface Platform {}
 	}
+
+	class Go {
+		new(): {
+			run: (inst: WebAssembly.Instance) => Promise<void>;
+			importObject: WebAssembly.Imports;
+		};
+	}
+
+	const marka: {
+		matchBlocks(s: string, t: string): string;
+		detectType(markdown: string): string;
+		parseFile(input: string): string;
+		parseFileWithTemplate(markdown: string, template: string): string;
+		listTemplates(): string;
+		getTemplate(name: string): string;
+		compileTemplate(source: string): string;
+	};
 }
 
-export {};
+export {};
\ No newline at end of file
diff --git a/playground/src/lib/components/Playground.svelte b/playground/src/lib/components/Playground.svelte
index 879f085..7ecf140 100644
--- a/playground/src/lib/components/Playground.svelte
+++ b/playground/src/lib/components/Playground.svelte
@@ -2,6 +2,7 @@
 	import { json } from '@codemirror/lang-json';
 	import { markdown } from '@codemirror/lang-markdown';
 	import {
+		compileTemplate,
 		getTemplate,
 		listTemplates,
 		parseMarkdown,
@@ -86,9 +87,12 @@ My favourite baguette recipe
 			return;
 		}
 		try {
+			compileTemplate(templateValue);
+
 			const result = templateValue
 				? parseMarkdownWithTemplate(markdownValue, templateValue)
 				: parseMarkdown(markdownValue);
+			console.log({ result });
 
 			if ('error' in result) {
 				jsonOutput = '';
diff --git a/playground/src/lib/wasm.ts b/playground/src/lib/wasm.ts
index 431cb3a..fe80d1f 100644
--- a/playground/src/lib/wasm.ts
+++ b/playground/src/lib/wasm.ts
@@ -1,20 +1,6 @@
 import { readable } from "svelte/store";
 
-declare global {
-  interface Window {
-    Go: {
-      new(): {
-        run: (inst: WebAssembly.Instance) => Promise<void>;
-        importObject: WebAssembly.Imports;
-      };
-    };
-    markaMatchBlocks: (input: string) => unknown;
-    markaParseFile: (input: string) => string;
-    markaParseFileWithTemplate: (markdown: string, template: string) => string;
-    markaListTemplates: () => string;
-    markaGetTemplate: (name: string) => string;
-  }
-}
+
 
 export const wasmReady = readable(false, (set) => {
   if (typeof window === "undefined") {
@@ -22,7 +8,7 @@ export const wasmReady = readable(false, (set) => {
   }
 
   const loadWasm = async () => {
-    const go = new window.Go();
+    const go = new globalThis.Go();
     try {
       const result = await WebAssembly.instantiateStreaming(
         fetch("/main.wasm"),
@@ -38,7 +24,7 @@ export const wasmReady = readable(false, (set) => {
   if (document.readyState === "complete") {
     loadWasm();
   } else {
-    window.addEventListener("load", loadWasm);
+    globalThis.addEventListener("load", loadWasm);
   }
 });
 
@@ -54,46 +40,75 @@ export type ParseResultError = {
 export type ParseResult = ParseResultSuccess | ParseResultError;
 
 export function parseMarkdown(markdown: string): ParseResult {
-  if (typeof window.markaParseFile !== "function") {
+  if (typeof globalThis.marka?.parseFile !== "function") {
     throw new Error("Wasm module not ready");
   }
-  const result = window.markaParseFile(markdown);
-  if (result.error) return result;
-  return JSON.parse(result);
+  const resultString = globalThis.marka.parseFile(markdown);
+  return JSON.parse(resultString);
 }
 
-export function matchBlocks(markdown: string): ParseResult {
-  if (typeof window.markaMatchBlocks !== "function") {
+export function compileTemplate(templateSource: string) {
+  if (typeof globalThis.marka?.compileTemplate !== "function") {
     throw new Error("Wasm module not ready");
   }
-  const result = window.markaMatchBlocks(markdown) as ParseResult;
-  if (result.error) return result;
-  return JSON.parse(result);
+  const resultString = globalThis.marka.compileTemplate(templateSource);
+  const result = JSON.parse(resultString);
+  console.log({ result });
+  return result;
+}
+
+export function matchBlocks(markdown: string, template: string): ParseResult {
+  if (typeof globalThis.marka?.matchBlocks !== "function") {
+    throw new Error("Wasm module not ready");
+  }
+  const resultString = globalThis.marka.matchBlocks(markdown, template);
+  return JSON.parse(resultString);
 }
 
 export function parseMarkdownWithTemplate(
   markdown: string,
   template: string,
 ): ParseResult {
-  if (typeof window.markaParseFileWithTemplate !== "function") {
+  if (typeof globalThis.marka?.parseFileWithTemplate !== "function") {
     throw new Error("Wasm module not ready");
   }
-  const result = window.markaParseFileWithTemplate(markdown, template);
-  if (result.error) return result;
-  return JSON.parse(result);
+  const resultString = globalThis.marka.parseFileWithTemplate(
+    markdown,
+    template,
+  );
+  return JSON.parse(resultString);
 }
 
 export function listTemplates(): string[] {
-  if (typeof window.markaListTemplates !== "function") {
+  if (typeof globalThis.marka?.listTemplates !== "function") {
     throw new Error("Wasm module not ready");
   }
-  const result = window.markaListTemplates();
-  return JSON.parse(result);
+  const resultString = globalThis.marka.listTemplates();
+  return JSON.parse(resultString);
 }
 
 export function getTemplate(name: string): string {
-  if (typeof window.markaGetTemplate !== "function") {
+  if (typeof globalThis.marka?.getTemplate !== "function") {
     throw new Error("Wasm module not ready");
   }
-  return window.markaGetTemplate(name);
+  return globalThis.marka.getTemplate(name);
 }
+
+export function detectType(markdown: string): string | ParseResultError {
+  if (typeof globalThis.marka?.detectType !== "function") {
+    throw new Error("Wasm module not ready");
+  }
+  const result = globalThis.marka.detectType(markdown);
+  try {
+    // If the result is a JSON string with an error, parse and return it
+    const parsed = JSON.parse(result);
+    if (parsed.error) {
+      return parsed;
+    }
+  } catch (e) {
+    // Otherwise, it's a plain string for success
+    return result;
+  }
+  return result;
+}
+
diff --git a/playground/static/main.wasm b/playground/static/main.wasm
index dc730e1..c4dc528 100644
Binary files a/playground/static/main.wasm and b/playground/static/main.wasm differ
diff --git a/playground/wasm/build.sh b/playground/wasm/build.sh
index 403c3b7..4ac7a72 100755
--- a/playground/wasm/build.sh
+++ b/playground/wasm/build.sh
@@ -7,12 +7,13 @@ OUT_WASM="$OUT_DIR/main.wasm"
 
 mkdir -p "$OUT_DIR"
 
-tinygo build -target=wasm -opt=z -no-debug -panic=trap -gc=leaking \
+tinygo build -target=wasm \
+  -opt=z -no-debug -panic=print -gc=leaking \
   -o "$OUT_WASM" "$SCRIPT_DIR"
 
 # Optional post-process (run only if tools exist)
-# command -v wasm-opt >/dev/null && wasm-opt -Oz --strip-debug --strip-dwarf --strip-producers \
-#   -o "$OUT_WASM.tmp" "$OUT_WASM" && mv "$OUT_WASM.tmp" "$OUT_WASM"
+command -v wasm-opt >/dev/null && wasm-opt -Oz --strip-debug --strip-dwarf --strip-producers \
+  -o "$OUT_WASM.tmp" "$OUT_WASM" && mv "$OUT_WASM.tmp" "$OUT_WASM"
 # command -v wasm-strip >/dev/null && wasm-strip "$OUT_WASM"
 # command -v brotli    >/dev/null && brotli -f -q 11 "$OUT_WASM" -o "$OUT_WASM.br"
 # command -v gzip      >/dev/null && gzip -c -9 "$OUT_WASM" > "$OUT_WASM.gz"
diff --git a/playground/wasm/main.go b/playground/wasm/main.go
index c6c4da2..1ac1178 100644
--- a/playground/wasm/main.go
+++ b/playground/wasm/main.go
@@ -8,92 +8,108 @@ import (
 
 	p "git.max-richter.dev/max/marka/parser"
 	"git.max-richter.dev/max/marka/registry"
+	"git.max-richter.dev/max/marka/template"
 )
 
-func matchBlocks(_ js.Value, args []js.Value) any {
-	if len(args) == 0 {
-		return js.ValueOf(map[string]any{"error": "missing markdown"})
-	}
-	t, err := p.MatchBlocks(args[0].String(), args[1].String())
-	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
-	}
-
-	jsonString, _ := json.Marshal(t)
-
-	return js.ValueOf(string(jsonString)) // plain string
+func wrapError(err error) string {
+	errMap := map[string]any{"error": err.Error()}
+	errJSON, _ := json.Marshal(errMap)
+	return string(errJSON)
 }
 
-func detectType(_ js.Value, args []js.Value) any {
-	if len(args) == 0 {
-		return js.ValueOf(map[string]any{"error": "missing markdown"})
-	}
-	t, err := p.DetectType(args[0].String())
+func MatchBlocks(this js.Value, args []js.Value) any {
+	s := args[0].String()
+	t := args[1].String()
+	matched, err := p.MatchBlocks(s, t)
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
 	}
-	return js.ValueOf(t) // plain string
+	jsonString, _ := json.Marshal(matched)
+	return string(jsonString)
 }
 
-func parseFile(_ js.Value, args []js.Value) any {
-	if len(args) == 0 {
-		return js.ValueOf(map[string]any{"error": "missing markdown"})
-	}
-	res, err := p.ParseFile(args[0].String())
+func DetectType(this js.Value, args []js.Value) any {
+	markdown := args[0].String()
+	t, err := p.DetectType(markdown)
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
+	}
+	return t
+}
+
+func ParseFile(this js.Value, args []js.Value) any {
+	markdown := args[0].String()
+	res, err := p.ParseFile(markdown)
+	if err != nil {
+		return wrapError(err)
 	}
 	b, err := json.Marshal(res)
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
 	}
-	return js.ValueOf(string(b))
+	return string(b)
 }
 
-func parseFileWithTemplate(_ js.Value, args []js.Value) any {
-	if len(args) < 2 {
-		return js.ValueOf(map[string]any{"error": "missing markdown or template"})
-	}
-	res, err := p.ParseFileWithTemplate(args[0].String(), args[1].String())
+func ParseFileWithTemplate(this js.Value, args []js.Value) any {
+	markdown := args[0].String()
+	template := args[1].String()
+	res, err := p.ParseFileWithTemplate(markdown, template)
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
 	}
 	b, err := json.Marshal(res)
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
 	}
-	return js.ValueOf(string(b))
+	return string(b)
 }
 
-func listTemplates(_ js.Value, args []js.Value) any {
+func ListTemplates(this js.Value, args []js.Value) any {
 	templates, err := registry.ListTemplates()
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
 	}
 	b, err := json.Marshal(templates)
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
 	}
-	return js.ValueOf(string(b))
+	return string(b)
 }
 
-func getTemplate(_ js.Value, args []js.Value) any {
-	if len(args) == 0 {
-		return js.ValueOf(map[string]any{"error": "missing template name"})
-	}
-	template, err := registry.GetTemplate(args[0].String())
+func GetTemplate(this js.Value, args []js.Value) any {
+	name := args[0].String()
+	template, err := registry.GetTemplate(name)
 	if err != nil {
-		return js.ValueOf(map[string]any{"error": err.Error()})
+		return wrapError(err)
 	}
-	return js.ValueOf(template)
+	return template
+}
+
+func CompileTemplate(this js.Value, args []js.Value) any {
+	source := args[0].String()
+	template, err := template.CompileTemplate(source)
+	if err != nil {
+		return wrapError(err)
+	}
+	b, err := json.Marshal(template)
+	if err != nil {
+		return wrapError(err)
+	}
+	return string(b)
 }
 
 func main() {
-	js.Global().Set("markaDetectType", js.FuncOf(detectType))
-	js.Global().Set("markaParseFile", js.FuncOf(parseFile))
-	js.Global().Set("markaParseFileWithTemplate", js.FuncOf(parseFileWithTemplate))
-	js.Global().Set("markaMatchBlocks", js.FuncOf(matchBlocks))
-	js.Global().Set("markaListTemplates", js.FuncOf(listTemplates))
-	js.Global().Set("markaGetTemplate", js.FuncOf(getTemplate))
+	marka := js.Global().Get("Object").New()
+
+	marka.Set("matchBlocks", js.FuncOf(MatchBlocks))
+	marka.Set("detectType", js.FuncOf(DetectType))
+	marka.Set("parseFile", js.FuncOf(ParseFile))
+	marka.Set("parseFileWithTemplate", js.FuncOf(ParseFileWithTemplate))
+	marka.Set("listTemplates", js.FuncOf(ListTemplates))
+	marka.Set("getTemplate", js.FuncOf(GetTemplate))
+	marka.Set("compileTemplate", js.FuncOf(CompileTemplate))
+
+	js.Global().Set("marka", marka)
+
 	select {}
-}
+}
\ No newline at end of file
diff --git a/registry/templates/Article.marka b/registry/templates/Article.marka
index 74ab0c3..f5cb9b0 100644
--- a/registry/templates/Article.marka
+++ b/registry/templates/Article.marka
@@ -22,16 +22,13 @@
       pathAlias: rating
     - path: reviewRating.bestRating
       codec: const
-      value: 5
       hidden: true
     - path: reviewRating.worstRating
       codec: const
-      value: 1
       hidden: true
 }
 ---
 
 # { headline }
-{ keywords | hashtags }
 
 { articleBody }
diff --git a/registry/templates/Recipe.marka b/registry/templates/Recipe.marka
index cc9c245..0bba9fc 100644
--- a/registry/templates/Recipe.marka
+++ b/registry/templates/Recipe.marka
@@ -10,7 +10,6 @@
     - path: "_type"
       codec: const
       value: Recipe
-      hidden: true
     - path: image
     - path: author._type
       codec: const
@@ -30,7 +29,6 @@
 ---
 
 # { name | text }
-{ keywords | hashtags,optional }
 
 { description | text }
 
diff --git a/template/blocks_yaml.go b/template/blocks_yaml.go
index 4f58f3c..a4a9db9 100644
--- a/template/blocks_yaml.go
+++ b/template/blocks_yaml.go
@@ -18,11 +18,11 @@ type yamlBlock struct {
 }
 
 type yamlField struct {
-	Path      string   `yaml:"path"`
-	Value     any      `yaml:"value,omitempty"`
-	Codec     string   `yaml:"codec"`
-	Hidden    bool     `yaml:"hidden,omitempty"`
-	PathAlias []string `yaml:"pathAlias,omitempty"`
+	Path      string `yaml:"path"`
+	Value     any    `yaml:"value,omitempty"`
+	Codec     string `yaml:"codec"`
+	Hidden    bool   `yaml:"hidden,omitempty"`
+	PathAlias string `yaml:"pathAlias,omitempty"`
 }
 
 func parseYamlTemplate(input Slice) (block Block, err error) {
@@ -34,7 +34,7 @@ func parseYamlTemplate(input Slice) (block Block, err error) {
 	dec.KnownFields(true)
 
 	if err := dec.Decode(&blk); err != nil {
-		return block, NewErrorf("content '%q' -> %w", cleaned, err).WithPosition(input.start, input.end)
+		return block, NewErrorf("failed to parse yaml -> %w", err).WithPosition(input.start, input.end)
 	}
 
 	if blk.Path == "" {
diff --git a/template/compile.go b/template/compile.go
index b8cbe84..d82794d 100644
--- a/template/compile.go
+++ b/template/compile.go
@@ -1,9 +1,13 @@
 package template
 
+import "strings"
+
 // CompileTemplate scans once, emitting:
 // - data blocks: inner content between a line that's exactly "{" and a line that's exactly "}"
 // - matching blocks: gaps between data blocks (excluding the brace lines themselves)
 func CompileTemplate(templateSource string) ([]Block, error) {
+	templateSource = strings.TrimSuffix(templateSource, "\n")
+
 	var out []Block
 	var curlyIndex int
 
diff --git a/template/compile_test.go b/template/compile_test.go
index b76a8b0..6fe799f 100644
--- a/template/compile_test.go
+++ b/template/compile_test.go
@@ -1,6 +1,7 @@
 package template_test
 
 import (
+	"fmt"
 	"testing"
 
 	"git.max-richter.dev/max/marka/registry"
@@ -20,6 +21,10 @@ func TestExtractBlocks(t *testing.T) {
 		t.FailNow()
 	}
 
+	for i, b := range templateBlocks {
+		fmt.Printf("Block#%d: %q\n", i, b.GetContent())
+	}
+
 	expected := []template.Block{
 		{
 			Type: template.MatchingBlock,
@@ -58,14 +63,11 @@ func TestExtractBlocks(t *testing.T) {
 		{Type: template.MatchingBlock},
 		{Type: template.DataBlock, Path: "name", Codec: "text"},
 		{Type: template.MatchingBlock},
-		{Type: template.DataBlock, Path: "keywords", Codec: "hashtags", Optional: true},
-		{Type: template.MatchingBlock},
 		{Type: template.DataBlock, Path: "description", Codec: "text"},
 		{Type: template.MatchingBlock},
 		{Type: template.DataBlock, Path: "recipeIngredient", Codec: "list", ListTemplate: "- { . }"},
 		{Type: template.MatchingBlock},
 		{Type: template.DataBlock, Path: "recipeInstructions", Codec: "list", ListTemplate: "{ @index }. { . }"},
-		{Type: template.MatchingBlock},
 	}
 
 	if len(templateBlocks) != len(expected) {
diff --git a/testdata/data/article_simple/output.json b/testdata/data/article_simple/output.json
index 776eb00..a8a1f8f 100644
--- a/testdata/data/article_simple/output.json
+++ b/testdata/data/article_simple/output.json
@@ -1,4 +1,5 @@
 {
+  "_schema": "Article",
   "_type": "Article",
   "headline": "My First Article",
   "author": {
diff --git a/testdata/data/baguette/output.json b/testdata/data/baguette/output.json
index cb217a4..61e7b2a 100644
--- a/testdata/data/baguette/output.json
+++ b/testdata/data/baguette/output.json
@@ -1,4 +1,5 @@
 {
+  "_schema": "Recipe",
   "_type": "Recipe",
   "name": "Baguette",
   "author": {
diff --git a/testdata/data/recipe_salad/input.md b/testdata/data/recipe_salad/input.md
index d6cd8c7..c9c917d 100644
--- a/testdata/data/recipe_salad/input.md
+++ b/testdata/data/recipe_salad/input.md
@@ -8,7 +8,6 @@ recipeYield: 2 servings
 ---
 
 # Simple Salad
-#healthy #salad
 
 A quick green salad.
 
diff --git a/testdata/data/recipe_salad/output.json b/testdata/data/recipe_salad/output.json
index 62ad74c..0b908b4 100644
--- a/testdata/data/recipe_salad/output.json
+++ b/testdata/data/recipe_salad/output.json
@@ -7,10 +7,6 @@
     "_type": "Person",
     "name": "Alex Chef"
   },
-  "keywords": [
-    "healthy",
-    "salad"
-  ],
   "description": "A quick green salad.",
   "prepTime": "PT10M",
   "cookTime": "PT0M",