feat: update playground paths

README.md

@@ -8,13 +8,43 @@ Bidirectional mapping between Markdown and JSON (Schema.org-style) via small, de
 *   **Declarative Templates:** Define your mappings with concise, easy-to-understand templates.
 *   **JSON Schema Validation:** Validate parsed JSON against Schema.org entities using JSON Schema.
 
+## How it works
+
+Marka uses a custom template file to enable bidirectional between Markdown and Data. A minimal `marka` schema could look like:
+
+```markdown
+# { articleTitle }
+
+{ articleBody }
+```
+
+Then it could parse the following markdown:
+
+```markdown
+# MyArticle
+
+The article body which could 
+contain newlines.
+```
+
+Into the following data:
+
+```json
+{
+  "articleTitle": "MyArticle",
+  "articleBody": "The article body which could\ncontain newlines.",
+}
+```
+
+And reversely if you give it the json it could reproduce the input markdown. If you want to dive into the deeper workings of the template look at [template/README.md](./template/README.md)
+
 ## Docker Image (CRUD API)
 
 A Docker image is available to transform a specified directory into a CRUD API. This allows you to expose your Markdown-to-JSON mappings as a web service.
 
 To run the Docker image:
 ```bash
-docker run -p 8080:8080 -v /path/to/your/data:/app/data marka-crud-api
+docker run -p 8080:8080 -v /path/to/your/data:/app/data max/marka-server
 ```
 *(Replace `/path/to/your/data` with the absolute path to the directory you want to expose.)*
 

examples/Article/A dress a day.md

@@ -1,5 +1,5 @@
 ---
-@type: Article
+_type: Article
 author.name: Erin Mckean
 url: https://dressaday.com/2006/10/20/you-dont-have-to-be-pretty/
 rating: 5

examples/Books/Minimal.md

@@ -1,15 +1,14 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Alice
 datePublished: 2025-08-01
 itemReviewed:
-  @type: Book
+  _type: Book
   name: Untitled
   author:
-    @type: Person
+    _type: Person
     name: Unknown
 ---
 

examples/Books/NoAuthor.md

@@ -1,12 +1,11 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Eve
 datePublished: 2025-08-15
 itemReviewed:
-  @type: Book
+  _type: Book
   name: Anonymous Poems
 reviewBody: "Short, haunting, and powerful verses."
 reviewRating.ratingValue: 4

examples/Books/NoBody.md

@@ -1,15 +1,14 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Clara
 datePublished: 2025-08-10
 itemReviewed:
-  @type: Book
+  _type: Book
   name: 1984
   author:
-    @type: Person
+    _type: Person
     name: George Orwell
 reviewRating: 5
 ---

examples/Books/NoRating.md

@@ -1,15 +1,14 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Bob
 datePublished: 2025-08-05
 itemReviewed:
-  @type: Book
+  _type: Book
   name: War and Peace
   author:
-    @type: Person
+    _type: Person
     name: Leo Tolstoy
 reviewAspect:
   - Length

examples/Books/TheGreatGatsby.md

@@ -1,9 +1,9 @@
 ---
-@type: Review
+_type: Review
 author:
   name: Max Richter
 itemReviewed:
-  @type: Book
+  _type: Book
   author:
     name: F. Scott Fitzgerald
 reviewRating: 5

examples/Movies/Minimal.md

@@ -1,12 +1,11 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Frank
 datePublished: 2025-08-01
 itemReviewed:
-  @type: Movie
+  _type: Movie
   name: Untitled Film
 ---
 

examples/Movies/Negative.md

@@ -1,15 +1,14 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Grace
 datePublished: 2025-08-02
 itemReviewed:
-  @type: Movie
+  _type: Movie
   name: The Room
   author:
-    @type: Person
+    _type: Person
     name: Tommy Wiseau
 negativeNotes:
   - Awkward dialogue

examples/Movies/NoBody.md

@@ -1,15 +1,14 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Jack
 datePublished: 2025-08-06
 itemReviewed:
-  @type: Movie
+  _type: Movie
   name: Blade Runner
   author:
-    @type: Person
+    _type: Person
     name: Ridley Scott
 reviewRating: 4.5/5
 reviewAspect:

examples/Movies/Structured.md

@@ -1,15 +1,14 @@
 ---
-@context: https://schema.org
+_type: Review
-@type: Review
 author:
-  @type: Person
+  _type: Person
   name: Henry
 datePublished: 2025-08-03
 itemReviewed:
-  @type: Movie
+  _type: Movie
   name: Inception
   author:
-    @type: Person
+    _type: Person
     name: Christopher Nolan
 reviewAspect:
   - Story

examples/Recipes/baguette.md

@@ -1,4 +1,5 @@
 ---
+_type: Recipe
 author.name: Max Richter
 ---
 

examples/Recipes/complex.md

@@ -1,6 +1,6 @@
 ---
 author.name: Jane Doe
-author.@type: Organization
+author._type: Organization
 recipeCategory: ["Dessert", "Vegan", "Quick"]
 ---
 

go.work

@@ -1,7 +1,8 @@
-go 1.24.5
+go 1.24.7
 
 use (
 	./parser
+	./playground/wasm
 	./registry
 	./renderer
 	./server

go.work.sum

@@ -1,4 +1,8 @@
-github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+git.max-richter.dev/max/marka/parser v0.0.0-20250819170608-69c2550f448e/go.mod h1:xQK6tsgr9BOoeFw8JxjBwDkVENlOqapmcRkYyf/L+SQ=
+git.max-richter.dev/max/marka/registry v0.0.0-20250819170608-69c2550f448e/go.mod h1:n793S7TENIfgHpZLz0lm0qorM7eCx3zBLby3Fb++hZA=
+git.max-richter.dev/max/marka/template v0.0.0-20250819170608-69c2550f448e/go.mod h1:Uxi5xcxtnjopsIZjjMlFaWJGuglB9JNL++FuaSbOf6U=
+git.max-richter.dev/max/marka/testdata v0.0.0-20250819195334-b3c01bb43d9a/go.mod h1:88SkY5pTONkgfBy1FT10LoqRC8rt36iF1fk/rupjuJY=
+git.max-richter.dev/max/marka/validator v0.0.0-20250819170608-69c2550f448e/go.mod h1:qdGfCFRzsGedmnd77vb7pu/EMx0W0DcQBMEfvNxMYsw=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=

mise.toml

@@ -0,0 +1,2 @@
+[tools]
+go = "1.24.7"

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)
 	}

parser/go.mod

@@ -1,6 +1,6 @@
 module git.max-richter.dev/max/marka/parser
 
-go 1.24.5
+go 1.24.7
 
 require (
 	git.max-richter.dev/max/marka/registry v0.0.0-20250817132016-6db87db32567

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 {

parser/matcher/matcher_test.go

@@ -10,21 +10,21 @@ 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 {
 		Needle                 string
 		Start, End, StartIndex int
 	}{
-		{StartIndex: 0, Needle: "# Ingredients\n", Start: 77, End: 91},
+		{StartIndex: 0, Needle: "## Ingredients\n", Start: 90, End: 105},
-		{StartIndex: 0, Needle: "# Ingrdients\n", Start: 77, End: 91},
+		{StartIndex: 0, Needle: "## Ingrdients\n", Start: 90, End: 105},
-		{StartIndex: 0, Needle: "# Inrdients\n", Start: 77, End: 91},
+		{StartIndex: 0, Needle: "## Inrdients\n", Start: 90, End: 105},
 		{StartIndex: 0, Needle: "---\n", Start: 0, End: 4},
-		{StartIndex: 4, Needle: "---\n", Start: 29, End: 33},
+		{StartIndex: 4, Needle: "---\n", Start: 43, End: 47},
-		{StartIndex: 0, Needle: "# Steps\n", Start: 116, End: 124},
+		{StartIndex: 0, Needle: "## Steps\n", Start: 129, End: 138},
-		{StartIndex: 0, Needle: "# Stps\n", Start: 116, End: 124},
+		{StartIndex: 0, Needle: "## Stps\n", Start: 129, End: 138},
-		{StartIndex: 0, Needle: "# Step\n", Start: 116, End: 124},
+		{StartIndex: 0, Needle: "## Step\n", Start: 129, End: 138},
 	}
 
 	for _, test := range tests {
@@ -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())
@@ -51,20 +52,21 @@ func TestFuzzyBlockMatch(t *testing.T) {
 
 	matches := matcher.MatchBlocksFuzzy(string(recipeMd), blocks, 0.3)
 
+	for _, m := range matches {
+		fmt.Printf("Content: '%s'->'%q'\n\n", m.Block.Path, m.GetContent())
+	}
+
 	expected := []struct {
 		value string
 	}{
 		{
-			value: "@type: Recipe\nauthor.name: Max Richter",
+			value: "_type: Recipe\nauthor.name: Max Richter",
 		},
 		{
 			value: "Baguette",
 		},
 		{
-			value: "\nMy favourite baguette recipe",
+			value: "My favourite baguette recipe",
-		},
-		{
-			value: "",
 		},
 		{
 			value: "- Flour\n- Water\n- Salt",
@@ -80,13 +82,12 @@ func TestFuzzyBlockMatch(t *testing.T) {
 			t.FailNow()
 		}
 		if expected[i].value != m.GetContent() {
-			t.Errorf("Match %d did not match expected: %q", i, 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 {
@@ -95,7 +96,7 @@ func TestFuzzyBlockMatchSalad(t *testing.T) {
 	}
 	blocks, err := template.CompileTemplate(schemaMd)
 	if err != nil {
-		t.Errorf("Failed to compile template: %s", err.Error())
+		t.Errorf("failed to compile template: %s", err.Error())
 		t.FailNow()
 	}
 
@@ -105,14 +106,11 @@ func TestFuzzyBlockMatchSalad(t *testing.T) {
 		value string
 	}{
 		{
-			value: "@type: Recipe\nauthor.name: Alex Chef\ncookTime: PT0M\nimage: https://example.com/salad.jpg\nprepTime: PT10M\nrecipeYield: 2 servings",
+			value: "_type: Recipe\nauthor.name: Alex Chef\ncookTime: PT0M\nimage: https://example.com/salad.jpg\nprepTime: PT10M\nrecipeYield: 2 servings",
 		},
 		{
 			value: "Simple Salad",
 		},
-		{
-			value: "#healthy #salad",
-		},
 		{
 			value: "A quick green salad.",
 		},

parser/parser.go

@@ -15,62 +15,69 @@ import (
 func DetectType(markdownContent string) (string, error) {
 	defaultSchemaContent, err := registry.GetTemplate("_default")
 	if err != nil {
-		return "", fmt.Errorf("could not get schema: %w", err)
+		return "", fmt.Errorf("could not get schema -> %w", err)
 	}
 
 	defaultSchema, err := template.CompileTemplate(defaultSchemaContent)
 	if err != nil {
-		return "", fmt.Errorf("failed to compile template: %w", err)
+		return "", fmt.Errorf("failed to compile template -> %w", err)
 	}
 
 	blocks := matcher.MatchBlocksFuzzy(markdownContent, defaultSchema, 0.3)
 
 	result, err := decoders.Parse(blocks)
 	if err != nil {
-		return "", fmt.Errorf("failed to parse blocks: %w", err)
+		return "", fmt.Errorf("failed to parse blocks -> %w", err)
 	}
 
 	if result, ok := result.(map[string]any); ok {
-		if contentType, ok := result["@type"]; ok {
+		if contentType, ok := result["_type"]; ok {
 			return contentType.(string), nil
-		} else {
-			return "", fmt.Errorf("frontmatter did not contain '@type'")
 		}
-	} else {
+		return "", fmt.Errorf("frontmatter did not contain '_type'")
-		return "", fmt.Errorf("could not parse frontmatter")
 	}
+
+	return "", fmt.Errorf("could not parse frontmatter")
 }
 
-func prepareMarkdown(input string) string {
+func MatchBlocks(markdownContent, templateContent string) ([]matcher.Block, error) {
-	input = strings.TrimSuffix(input, "\n")
+	markdownContent = strings.TrimSuffix(markdownContent, "\n")
-	input = strings.ReplaceAll(input, "@type:", `"@type":`)
+
-	input = strings.ReplaceAll(input, "@context:", `"@context":`)
+	tpl, err := template.CompileTemplate(templateContent)
-	return input
+	if err != nil {
+		return nil, fmt.Errorf("failed to compile template -> %w", err)
+	}
+
+	return matcher.MatchBlocksFuzzy(markdownContent, tpl, 0.3), nil
 }
 
 func ParseFile(markdownContent string) (any, error) {
-	markdownContent = prepareMarkdown(markdownContent)
-
 	contentType, err := DetectType(markdownContent)
 	if err != nil {
-		return nil, fmt.Errorf("could not detect type: %w", err)
+		return nil, fmt.Errorf("could not detect type -> %w", err)
 	}
 
 	templateContent, err := registry.GetTemplate(contentType)
 	if err != nil {
-		return nil, fmt.Errorf("could not get schema: %w", err)
+		return nil, fmt.Errorf("could not get template -> %w", err)
 	}
 
-	template, err := template.CompileTemplate(templateContent)
+	return ParseFileWithTemplate(markdownContent, templateContent)
+}
+
+func ParseFileWithTemplate(markdownContent string, templateContent string) (any, error) {
+	markdownContent = strings.TrimSuffix(markdownContent, "\n")
+
+	tpl, err := template.CompileTemplate(templateContent)
 	if err != nil {
-		return nil, fmt.Errorf("failed to compile template: %w", err)
+		return nil, fmt.Errorf("failed to compile template -> %w", err)
 	}
 
-	blocks := matcher.MatchBlocksFuzzy(markdownContent, template, 0.3)
+	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)
+		return nil, fmt.Errorf("failed to compile blocks -> %w", err)
 	}
 
 	return result, nil

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")
 
@@ -28,7 +51,7 @@ func TestParseRecipe_Golden(t *testing.T) {
 	}
 }
 
-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))
@@ -47,7 +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))
@@ -66,7 +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))

playground/.gitignore

@@ -0,0 +1,23 @@
+node_modules
+
+# Output
+.output
+.vercel
+.netlify
+.wrangler
+/.svelte-kit
+/build
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Env
+.env
+.env.*
+!.env.example
+!.env.test
+
+# Vite
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*

playground/.npmrc

@@ -0,0 +1 @@
+engine-strict=true

playground/.prettierignore

@@ -0,0 +1,9 @@
+# Package Managers
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+bun.lock
+bun.lockb
+
+# Miscellaneous
+/static/

playground/.prettierrc

@@ -0,0 +1,16 @@
+{
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "none",
+	"printWidth": 100,
+	"plugins": ["prettier-plugin-svelte", "prettier-plugin-tailwindcss"],
+	"overrides": [
+		{
+			"files": "*.svelte",
+			"options": {
+				"parser": "svelte"
+			}
+		}
+	],
+	"tailwindStylesheet": "./src/app.css"
+}

playground/README.md

@@ -0,0 +1,38 @@
+# sv
+
+Everything you need to build a Svelte project, powered by [`sv`](https://github.com/sveltejs/cli).
+
+## Creating a project
+
+If you're seeing this, you've probably already done this step. Congrats!
+
+```sh
+# create a new project in the current directory
+npx sv create
+
+# create a new project in my-app
+npx sv create my-app
+```
+
+## Developing
+
+Once you've created a project and installed dependencies with `npm install` (or `pnpm install` or `yarn`), start a development server:
+
+```sh
+npm run dev
+
+# or start the server and open the app in a new browser tab
+npm run dev -- --open
+```
+
+## Building
+
+To create a production version of your app:
+
+```sh
+npm run build
+```
+
+You can preview the production build with `npm run preview`.
+
+> To deploy your app, you may need to install an [adapter](https://svelte.dev/docs/kit/adapters) for your target environment.

playground/eslint.config.js

@@ -0,0 +1,42 @@
+import prettier from 'eslint-config-prettier';
+import { fileURLToPath } from 'node:url';
+import { includeIgnoreFile } from '@eslint/compat';
+import js from '@eslint/js';
+import svelte from 'eslint-plugin-svelte';
+import { defineConfig } from 'eslint/config';
+import globals from 'globals';
+import ts from 'typescript-eslint';
+import svelteConfig from './svelte.config.js';
+
+const gitignorePath = fileURLToPath(new URL('./.gitignore', import.meta.url));
+
+export default defineConfig(
+	includeIgnoreFile(gitignorePath),
+	{ ignores: ['static/wasm_exec.js'] },
+	js.configs.recommended,
+	...ts.configs.recommended,
+	...svelte.configs.recommended,
+	prettier,
+	...svelte.configs.prettier,
+	{
+		languageOptions: {
+			globals: { ...globals.browser, ...globals.node }
+		},
+		rules: {
+			// typescript-eslint strongly recommend that you do not use the no-undef lint rule on TypeScript projects.
+			// see: https://typescript-eslint.io/troubleshooting/faqs/eslint/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
+			'no-undef': 'off'
+		}
+	},
+	{
+		files: ['**/*.svelte', '**/*.svelte.ts', '**/*.svelte.js'],
+		languageOptions: {
+			parserOptions: {
+				projectService: true,
+				extraFileExtensions: ['.svelte'],
+				parser: ts.parser,
+				svelteConfig
+			}
+		}
+	}
+);

playground/package.json

@@ -0,0 +1,58 @@
+{
+  "name": "playground",
+  "private": true,
+  "version": "0.0.1",
+  "type": "module",
+  "scripts": {
+    "dev": "vite dev",
+    "build": "vite build",
+    "preview": "vite preview",
+    "prepare": "svelte-kit sync || echo ''",
+    "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+    "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+    "format": "prettier --write .",
+    "lint": "prettier --check . && eslint ."
+  },
+  "devDependencies": {
+    "@eslint/compat": "^1.2.5",
+    "@eslint/js": "^9.22.0",
+    "@sveltejs/adapter-auto": "^6.0.0",
+    "@sveltejs/adapter-static": "^3.0.9",
+    "@sveltejs/kit": "^2.22.0",
+    "@sveltejs/vite-plugin-svelte": "^6.0.0",
+    "@tailwindcss/vite": "^4.0.0",
+    "@types/node": "^22",
+    "eslint": "^9.22.0",
+    "eslint-config-prettier": "^10.0.1",
+    "eslint-plugin-svelte": "^3.0.0",
+    "globals": "^16.0.0",
+    "prettier": "^3.4.2",
+    "prettier-plugin-svelte": "^3.3.3",
+    "prettier-plugin-tailwindcss": "^0.6.11",
+    "svelte": "^5.0.0",
+    "svelte-check": "^4.0.0",
+    "tailwindcss": "^4.0.0",
+    "typescript": "^5.0.0",
+    "typescript-eslint": "^8.20.0",
+    "vite": "^7.0.4"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "esbuild"
+    ]
+  },
+  "dependencies": {
+    "@codemirror/lang-javascript": "^6.2.4",
+    "@codemirror/lang-json": "^6.0.2",
+    "@codemirror/lang-markdown": "^6.3.4",
+    "@codemirror/lang-yaml": "^6.1.2",
+    "@codemirror/language": "^6.11.3",
+    "@codemirror/state": "^6.5.2",
+    "@codemirror/view": "^6.38.3",
+    "@fsegurai/codemirror-theme-github-light": "^6.2.2",
+    "codemirror": "^6.0.2",
+    "codemirror-theme-github": "^1.1.0",
+    "lucide-svelte": "^0.544.0",
+    "svelte-codemirror-editor": "^2.0.0"
+  }
+}

playground/src/app.css

@@ -0,0 +1,6 @@
+@import 'tailwindcss';
+
+
+.cm-foldGutter + .cm-foldGutter {
+  display: none !important;
+}

playground/src/app.d.ts

@@ -0,0 +1,30 @@
+// See https://svelte.dev/docs/kit/types#app.d.ts
+// for information about these interfaces
+declare global {
+	namespace App {
+		// interface Error {}
+		// interface Locals {}
+		// interface PageData {}
+		// 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 {};

playground/src/app.html

@@ -0,0 +1,11 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		%sveltekit.head%
+	</head>
+	<body data-sveltekit-preload-data="hover">
+		<div style="display: contents">%sveltekit.body%</div>
+	</body>
+</html>

playground/src/lib/assets/favicon.svg

@@ -0,0 +1,3 @@
+<svg width="202" height="202" viewBox="0 0 202 202" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M198 101C198 47.4284 154.572 4 101 4C63.6769 4 31.2771 25.0794 15.0566 55.9824C31.5802 36.8304 58.3585 25 87.5 25C107.135 25 125.868 30.5962 141.081 40.3643C163.17 54.5475 177.915 77.5995 176.999 105.066C176.961 122.231 171.229 138.064 161.595 150.771L159.861 153.057L133.999 112.606L100.778 164.568L65.0068 108.618L42.0176 144.873C57.3037 166.504 84.4388 181 114.5 181C149.395 181 180.331 159.267 193.398 130.6C196.385 121.268 198 111.323 198 101ZM29.0127 106.222C29.2632 118.862 33.0866 130.771 39.5967 141.223L64.9932 101.171L100.778 157.143L134 105.182L160.106 146.016C168.233 134.357 173 120.186 173 104.895H173.002C173.825 79.7876 160.762 58.4662 140.614 44.8486L101 108.688L61.3604 44.7793C41.8587 57.6651 29 79.7788 29 104.895L29.0127 106.222ZM202 101C202 156.781 156.781 202 101 202V198C134.1 198 163.327 181.42 180.831 156.113C164.258 173.559 140.379 185 114.5 185C82.6725 185 53.8784 169.41 37.9658 146.05C30.0365 134.409 25.3017 120.829 25.0137 106.303L25 104.895C25 77.6227 39.3659 53.7077 60.9336 40.3018L62.6338 39.2441L101 101.101L137.249 42.6855C123.002 33.9863 105.671 29 87.5 29C51.3264 29 19.6837 47.7188 7.41992 75.377C5.19019 83.5392 4 92.1306 4 101C4 154.572 47.4284 198 101 198V202C45.2192 202 0 156.781 0 101C0 45.2192 45.2192 0 101 0C156.781 0 202 45.2192 202 101Z" fill="#555"/>
+</svg>

playground/src/lib/components/EditorPanel.svelte

@@ -0,0 +1,94 @@
+<script lang="ts">
+	import CheckCircleIcon from '$lib/icons/CheckCircleIcon.svelte';
+	import MinusCircleIcon from '$lib/icons/MinusCircleIcon.svelte';
+	import XCircleIcon from '$lib/icons/XCircleIcon.svelte';
+	import type { Extension } from '@codemirror/state';
+	import { githubLight } from '@fsegurai/codemirror-theme-github-light';
+	import { basicSetup } from 'codemirror';
+	import type { Snippet } from 'svelte';
+	import CodeMirror from 'svelte-codemirror-editor';
+
+	interface Props {
+		title: string;
+		value: string;
+		placeholder?: string;
+		readonly?: boolean;
+		children?: Snippet;
+		headerActions?: Snippet;
+		subtitle?: string;
+		error?: string;
+		status?: 'success' | 'error' | 'indeterminate';
+		timing?: number;
+		pillText?: string;
+		langExtension?: Extension;
+	}
+
+	let {
+		title,
+		error,
+		value = $bindable(),
+		placeholder = '',
+		readonly = false,
+		children,
+		headerActions,
+		subtitle,
+		status,
+		timing,
+		pillText,
+		langExtension
+	}: Props = $props();
+</script>
+
+<div class="relative flex flex-1 flex-col overflow-hidden border-r border-gray-200 last:border-r-0">
+	<div class="flex items-center border-b border-gray-200 bg-gray-50/50 px-4 py-3">
+		{#if status === 'success'}
+			<CheckCircleIcon class="mr-2 h-5 w-5 text-green-500" />
+		{:else if status === 'error'}
+			<XCircleIcon class="mr-2 h-5 w-5 text-red-500" />
+		{:else if status === 'indeterminate'}
+			<MinusCircleIcon class="mr-2 h-5 w-5 text-gray-400" />
+		{/if}
+		<div class="flex-1">
+			<h2 class="flex items-center text-sm font-semibold tracking-wide text-gray-900 uppercase">
+				{title}
+				{#if pillText}
+					<span
+						class="ml-2 inline-flex items-center rounded-full bg-blue-100 px-2 py-0.5 text-xs font-medium text-blue-800"
+					>
+						{pillText}
+					</span>
+				{/if}
+			</h2>
+			{#if subtitle}
+				<p class="text-xs text-gray-500">{subtitle}</p>
+			{/if}
+		</div>
+		{#if headerActions}
+			<div class="ml-4">
+				{@render headerActions()}
+			</div>
+		{/if}
+		{#if timing !== undefined}
+			<div class="ml-4 text-xs text-gray-500">{timing}ms</div>
+		{/if}
+	</div>
+
+	{#if error}
+		<div class="border-b border-gray-200 bg-red-300 p-4 text-xs">
+			<pre>{error}</pre>
+		</div>
+	{/if}
+
+	<CodeMirror
+		bind:value
+		extensions={[basicSetup, langExtension].filter(Boolean) as Extension[]}
+		theme={githubLight}
+		{placeholder}
+		{readonly}
+		class="text-sm"
+	/>
+
+	{#if children}
+		{@render children()}
+	{/if}
+</div>

playground/src/lib/components/Header.svelte

@@ -0,0 +1,21 @@
+<script lang="ts">
+	import Logo from '$lib/icons/Logo.svelte';
+	import { GithubIcon } from 'lucide-svelte';
+</script>
+
+<header class="sticky top-0 z-10 border-b border-gray-200 bg-white/80 backdrop-blur-sm">
+	<div class="px-6 py-4">
+		<div class="flex w-full items-center justify-between">
+			<div class="flex items-center gap-3">
+				<Logo />
+				<div>
+					<h1 class="text-2xl font-bold text-black">Marka</h1>
+					<p class="text-sm text-gray-600">Bidirectional Markdown ↔ JSON Parser</p>
+				</div>
+			</div>
+			<a href="https://github.com/jim-fx/marka" target="_blank" rel="noopener noreferrer">
+				<GithubIcon class="h-6 w-6 text-gray-600 transition-colors duration-200 hover:text-black" />
+			</a>
+		</div>
+	</div>
+</header>

playground/src/lib/components/Playground.svelte

@@ -0,0 +1,197 @@
+<script lang="ts">
+	import { json } from '@codemirror/lang-json';
+	import { markdown } from '@codemirror/lang-markdown';
+	import {
+		compileTemplate,
+		getTemplate,
+		listTemplates,
+		parseMarkdown,
+		parseMarkdownWithTemplate,
+		wasmReady,
+		type ParseResultSuccess
+	} from '../wasm';
+	import EditorPanel from './EditorPanel.svelte';
+
+	let templates = $state([] as string[]);
+
+	const DEFAULT_MARKDOWN_VALUE = `---
+_type: Recipe
+author.name: Max Richter
+---
+
+# Baguette
+
+My favourite baguette recipe
+
+## Ingredients
+- Flour
+- Water
+- Salt
+
+## Steps
+1. Mix Flour Water and Salt
+2. Bake the bread`;
+
+	const DEFAULT_TEMPLATE_VALUE = '';
+
+	let templateValue = $state(
+		typeof window !== 'undefined'
+			? localStorage.getItem('templateValue') || DEFAULT_TEMPLATE_VALUE
+			: DEFAULT_TEMPLATE_VALUE
+	);
+	let markdownValue = $state(
+		typeof window !== 'undefined'
+			? localStorage.getItem('markdownValue') || DEFAULT_MARKDOWN_VALUE
+			: DEFAULT_MARKDOWN_VALUE
+	);
+
+	let jsonOutput = $state('');
+	let detectedSchemaName = $derived.by(() => {
+		try {
+			return JSON.parse(jsonOutput)['_schema'];
+		} catch {
+			return undefined;
+		}
+	});
+
+	let timings = $state<ParseResultSuccess['timings'] | null>(null);
+	let templateStatus = $state<'success' | 'error' | 'indeterminate' | undefined>(undefined);
+	let dataStatus = $state<'success' | 'error' | 'indeterminate' | undefined>(undefined);
+	let templateError = $state<string | undefined>();
+
+	$effect(() => {
+		if (typeof window !== 'undefined') {
+			localStorage.setItem('templateValue', templateValue);
+		}
+	});
+
+	$effect(() => {
+		if (typeof window !== 'undefined') {
+			localStorage.setItem('markdownValue', markdownValue);
+		}
+	});
+
+	$effect(() => {
+		if ($wasmReady) {
+			try {
+				templates = listTemplates();
+			} catch (e) {
+				console.error(e);
+			}
+		}
+		if (!$wasmReady) {
+			jsonOutput = 'Loading wasm...';
+			timings = null;
+			templateStatus = undefined;
+			dataStatus = undefined;
+			return;
+		}
+		try {
+			compileTemplate(templateValue);
+
+			const result = templateValue
+				? parseMarkdownWithTemplate(markdownValue, templateValue)
+				: parseMarkdown(markdownValue);
+
+			if ('error' in result) {
+				jsonOutput = '';
+				if (result.error.startsWith('failed to compile template')) {
+					templateError = result.error.replaceAll(' -> ', '\n ⟶ ');
+					templateStatus = 'error';
+					dataStatus = 'indeterminate';
+				} else {
+					templateError = undefined;
+					templateStatus = undefined;
+					dataStatus = 'error';
+				}
+			} else {
+				templateError = undefined;
+				jsonOutput = JSON.stringify(result, null, 2);
+				timings = result.timings;
+				templateStatus = 'success';
+				dataStatus = 'success';
+			}
+		} catch (e: unknown) {
+			console.log({ e });
+			jsonOutput = (e as Error).message;
+			timings = null;
+			if (jsonOutput.startsWith('failed to compile template')) {
+				templateStatus = 'error';
+				dataStatus = 'indeterminate';
+			} else {
+				templateStatus = undefined;
+				dataStatus = 'error';
+			}
+		}
+	});
+
+	function loadTemplate(name: string) {
+		if (!name) return;
+		try {
+			templateValue = getTemplate(name);
+		} catch (e) {
+			console.error(e);
+		}
+	}
+
+	function resetMarkdown() {
+		markdownValue = DEFAULT_MARKDOWN_VALUE;
+	}
+</script>
+
+<div class="flex flex-1 overflow-hidden">
+	<div class="grid flex-1 grid-cols-1 overflow-hidden lg:grid-cols-3">
+		<EditorPanel
+			title="Template"
+			bind:value={templateValue}
+			placeholder="Enter your Marka template here..."
+			error={templateError}
+			status={templateStatus}
+			timing={timings?.template_compilation}
+			subtitle="Define your mapping schema"
+			langExtension={markdown()}
+		>
+			{#snippet headerActions()}
+				<select
+					onchange={(e) => loadTemplate(e.currentTarget.value)}
+					class="rounded border border-gray-300 bg-white px-2 py-1 text-xs text-gray-700 shadow-sm focus:border-indigo-500 focus:ring-1 focus:ring-indigo-500 focus:outline-none"
+				>
+					<option value="">Load a template</option>
+					{#each templates as template (template)}
+						<option value={template}>{template}</option>
+					{/each}
+				</select>
+			{/snippet}
+		</EditorPanel>
+
+		<EditorPanel
+			title="Markdown"
+			bind:value={markdownValue}
+			placeholder="Enter your markdown content here..."
+			timing={timings?.markdown_parsing}
+			subtitle="Your source content"
+			langExtension={markdown()}
+		>
+			{#snippet headerActions()}
+				<button
+					onclick={resetMarkdown}
+					class="rounded border border-gray-300 bg-white px-2 py-1 text-xs text-gray-700 shadow-sm focus:border-indigo-500 focus:ring-1 focus:ring-indigo-500 focus:outline-none"
+				>
+					Reset
+				</button>
+			{/snippet}
+		</EditorPanel>
+
+		<EditorPanel
+			title="Data"
+			value={jsonOutput}
+			readonly={true}
+			status={dataStatus}
+			subtitle="Parsed JSON output"
+			pillText={!templateValue && detectedSchemaName
+				? `Detected Template: ${detectedSchemaName}`
+				: undefined}
+			langExtension={json()}
+		/>
+	</div>
+</div>

playground/src/lib/components/StatusBar.svelte

@@ -0,0 +1,25 @@
+<script lang="ts">
+	// import { CheckCircleIcon, AlertCircleIcon } from "lucide-svelte";
+
+	let status = $state<'success' | 'error' | 'idle'>('success');
+	let message = $state('Template parsed successfully');
+</script>
+
+<div class="border-t border-gray-200 bg-gray-50/50 px-6 py-2">
+	<div class="flex items-center justify-between text-sm">
+		<div class="flex items-center gap-2">
+			{#if status === 'success'}
+				<!-- <CheckCircleIcon class="h-4 w-4 text-green-600" /> -->
+				<span class="text-green-700">{message}</span>
+			{:else if status === 'error'}
+				<!-- <AlertCircleIcon class="h-4 w-4 text-red-600" /> -->
+				<span class="text-red-700">{message}</span>
+			{:else}
+				<div class="h-4 w-4 rounded-full bg-gray-300"></div>
+				<span class="text-gray-600">Ready</span>
+			{/if}
+		</div>
+
+		<div class="text-gray-500">Schema.org validation enabled</div>
+	</div>
+</div>

playground/src/lib/icons/CheckCircleIcon.svelte

@@ -0,0 +1,18 @@
+<script lang="ts">
+	let { class: className = '' } = $props();
+</script>
+
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	fill="none"
+	viewBox="0 0 24 24"
+	stroke-width="1.5"
+	stroke="currentColor"
+	class={className}
+>
+	<path
+		stroke-linecap="round"
+		stroke-linejoin="round"
+		d="M9 12.75L11.25 15 15 9.75M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
+	/>
+</svg>

playground/src/lib/icons/Logo.svelte

@@ -0,0 +1,14 @@
+<script>
+	import favicon from '$lib/assets/favicon.svg';
+</script>
+
+<img src={favicon} alt="logo" width="100%" />
+
+<style>
+	img {
+		height: 64px;
+		width: 64px;
+		aspect-ratio: 1;
+		filter: drop-shadow(0px 0px 8px #0002);
+	}
+</style>

playground/src/lib/icons/MinusCircleIcon.svelte

@@ -0,0 +1,14 @@
+<script lang="ts">
+	let { class: className = '' } = $props();
+</script>
+
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	fill="none"
+	viewBox="0 0 24 24"
+	stroke-width="1.5"
+	stroke="currentColor"
+	class={className}
+>
+	<path stroke-linecap="round" stroke-linejoin="round" d="M18 12H6" />
+</svg>

playground/src/lib/icons/XCircleIcon.svelte

@@ -0,0 +1,18 @@
+<script lang="ts">
+	let { class: className = '' } = $props();
+</script>
+
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	fill="none"
+	viewBox="0 0 24 24"
+	stroke-width="1.5"
+	stroke="currentColor"
+	class={className}
+>
+	<path
+		stroke-linecap="round"
+		stroke-linejoin="round"
+		d="M9.75 9.75l4.5 4.5m0-4.5l-4.5 4.5M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
+	/>
+</svg>

playground/src/lib/index.ts

@@ -0,0 +1 @@
+// place files you want to import through the `$lib` alias in this folder.

playground/src/lib/wasm.ts

@@ -0,0 +1,111 @@
+import { readable } from "svelte/store";
+
+export const wasmReady = readable(false, (set) => {
+  if (typeof window === "undefined") {
+    return;
+  }
+
+  const loadWasm = async () => {
+    const go = new globalThis.Go();
+    try {
+      const result = await WebAssembly.instantiateStreaming(
+        fetch("/_playground/main.wasm"),
+        go.importObject,
+      );
+      go.run(result.instance);
+      set(true);
+    } catch (error) {
+      console.error("Error loading wasm module:", error);
+    }
+  };
+
+  if (document.readyState === "complete") {
+    loadWasm();
+  } else {
+    globalThis.addEventListener("load", loadWasm);
+  }
+});
+
+export type ParseResultSuccess = {
+  data: unknown;
+  timings: { [key: string]: number };
+};
+
+export type ParseResultError = {
+  error: string;
+};
+
+export type ParseResult = ParseResultSuccess | ParseResultError;
+
+export function parseMarkdown(markdown: string): ParseResult {
+  if (typeof globalThis.marka?.parseFile !== "function") {
+    throw new Error("Wasm module not ready");
+  }
+  const resultString = globalThis.marka.parseFile(markdown);
+  return JSON.parse(resultString);
+}
+
+export function compileTemplate(templateSource: string) {
+  if (typeof globalThis.marka?.compileTemplate !== "function") {
+    throw new Error("Wasm module not ready");
+  }
+  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 globalThis.marka?.parseFileWithTemplate !== "function") {
+    throw new Error("Wasm module not ready");
+  }
+  const resultString = globalThis.marka.parseFileWithTemplate(
+    markdown,
+    template,
+  );
+  return JSON.parse(resultString);
+}
+
+export function listTemplates(): string[] {
+  if (typeof globalThis.marka?.listTemplates !== "function") {
+    throw new Error("Wasm module not ready");
+  }
+  const resultString = globalThis.marka.listTemplates();
+  return JSON.parse(resultString);
+}
+
+export function getTemplate(name: string): string {
+  if (typeof globalThis.marka?.getTemplate !== "function") {
+    throw new Error("Wasm module not ready");
+  }
+  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;
+}

playground/src/routes/+layout.svelte

@@ -0,0 +1,14 @@
+<script lang="ts">
+	import favicon from '$lib/assets/favicon.svg';
+	import '../app.css';
+
+	let { children } = $props();
+</script>
+
+<svelte:head>
+	<link rel="icon" href={favicon} />
+	<title>Marka Playground</title>
+	<script src="/_playground/wasm_exec.js"></script>
+</svelte:head>
+
+{@render children?.()}

playground/src/routes/+layout.ts

@@ -0,0 +1 @@
+export const prerender = true;

playground/src/routes/+page.svelte

@@ -0,0 +1,33 @@
+<script lang="ts">
+	import Header from '$lib/components/Header.svelte';
+	import Playground from '$lib/components/Playground.svelte';
+</script>
+
+<div class="bg-background text-foreground flex min-h-screen flex-col">
+	<Header />
+	<div class="flex flex-1 overflow-hidden">
+		<Playground />
+	</div>
+</div>
+
+<style>
+	:global(body) {
+		margin: 0;
+		font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+		background: white;
+	}
+
+	:global(*) {
+		box-sizing: border-box;
+	}
+
+	:global(textarea:focus) {
+		outline: none;
+	}
+
+	:global(pre) {
+		margin: 0;
+		font-family:
+			'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
+	}
+</style>

playground/static/logo.svg

@@ -0,0 +1,15 @@
+<svg width="100" height="100" viewBox="0 0 100 100" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path fill-rule="evenodd" clip-rule="evenodd" d="M0 50.0001C0 28.9476 20.1238 13 43.5 13C53.0351 13 71.5842 16.8812 80 30C80 30 75.9901 41.3368 62.8713 43.5645C49.7525 45.7922 40.5941 30.4457 30.9406 30.4457C21.2871 30.4457 13.3663 38.7833 13.3663 51.9283C13.3663 59.1669 16.0505 65.702 20 71.5C27.6856 82.7837 41.5584 90 57 90C80.3762 90 100 71.3259 100 50.0001C100 77.6145 77.6144 100 50 100C22.3856 100 0 77.6145 0 50.0001Z" fill="url(#paint0_radial_13_17)"/>
+<path d="M86.6337 51.9282C86.6337 60.2351 82.1782 70.1022 72.7723 74.505C63.3663 78.9077 57.4257 68.0693 43.3168 64.1089C29.2079 60.1485 19.6134 71.7441 19.6134 71.7441C27.299 83.0277 41.2416 90.5941 56.6832 90.5941C80.0594 90.5941 100 71.3257 100 50C100 22.3856 77.6144 0 50 0C22.3856 0 0 22.3856 0 50C0 28.9475 19.9406 13.3663 43.3168 13.3663C52.852 13.3663 61.9391 16.0842 69.3069 20.8153C80.0015 27.6822 87.0733 38.7896 86.6337 51.9802" fill="url(#paint1_radial_13_17)"/>
+<defs>
+<radialGradient id="paint0_radial_13_17" cx="0" cy="0" r="1" gradientTransform="matrix(-59 -89 76.5985 -50.3819 82 91)" gradientUnits="userSpaceOnUse">
+<stop stop-color="#8E8E8E"/>
+<stop offset="1" stop-color="#2C2C2C"/>
+</radialGradient>
+<radialGradient id="paint1_radial_13_17" cx="0" cy="0" r="1" gradientTransform="matrix(58 89.5 -74.0064 52.2522 26 5.5)" gradientUnits="userSpaceOnUse">
+<stop stop-color="#8E8E8E"/>
+<stop offset="1" stop-color="#2C2C2C"/>
+</radialGradient>
+</defs>
+</svg>
+

playground/static/robots.txt

@@ -0,0 +1,3 @@
+# allow crawling everything by default
+User-agent: *
+Disallow:

playground/static/wasm_exec.js

@@ -0,0 +1,553 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// This file has been modified for use by the TinyGo compiler.
+
+(() => {
+	// Map multiple JavaScript environments to a single common API,
+	// preferring web standards over Node.js API.
+	//
+	// Environments considered:
+	// - Browsers
+	// - Node.js
+	// - Electron
+	// - Parcel
+
+	if (typeof global !== "undefined") {
+		// global already exists
+	} else if (typeof window !== "undefined") {
+		window.global = window;
+	} else if (typeof self !== "undefined") {
+		self.global = self;
+	} else {
+		throw new Error("cannot export Go (neither global, window nor self is defined)");
+	}
+
+	if (!global.require && typeof require !== "undefined") {
+		global.require = require;
+	}
+
+	if (!global.fs && global.require) {
+		global.fs = require("node:fs");
+	}
+
+	const enosys = () => {
+		const err = new Error("not implemented");
+		err.code = "ENOSYS";
+		return err;
+	};
+
+	if (!global.fs) {
+		let outputBuf = "";
+		global.fs = {
+			constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
+			writeSync(fd, buf) {
+				outputBuf += decoder.decode(buf);
+				const nl = outputBuf.lastIndexOf("\n");
+				if (nl != -1) {
+					console.log(outputBuf.substr(0, nl));
+					outputBuf = outputBuf.substr(nl + 1);
+				}
+				return buf.length;
+			},
+			write(fd, buf, offset, length, position, callback) {
+				if (offset !== 0 || length !== buf.length || position !== null) {
+					callback(enosys());
+					return;
+				}
+				const n = this.writeSync(fd, buf);
+				callback(null, n);
+			},
+			chmod(path, mode, callback) { callback(enosys()); },
+			chown(path, uid, gid, callback) { callback(enosys()); },
+			close(fd, callback) { callback(enosys()); },
+			fchmod(fd, mode, callback) { callback(enosys()); },
+			fchown(fd, uid, gid, callback) { callback(enosys()); },
+			fstat(fd, callback) { callback(enosys()); },
+			fsync(fd, callback) { callback(null); },
+			ftruncate(fd, length, callback) { callback(enosys()); },
+			lchown(path, uid, gid, callback) { callback(enosys()); },
+			link(path, link, callback) { callback(enosys()); },
+			lstat(path, callback) { callback(enosys()); },
+			mkdir(path, perm, callback) { callback(enosys()); },
+			open(path, flags, mode, callback) { callback(enosys()); },
+			read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
+			readdir(path, callback) { callback(enosys()); },
+			readlink(path, callback) { callback(enosys()); },
+			rename(from, to, callback) { callback(enosys()); },
+			rmdir(path, callback) { callback(enosys()); },
+			stat(path, callback) { callback(enosys()); },
+			symlink(path, link, callback) { callback(enosys()); },
+			truncate(path, length, callback) { callback(enosys()); },
+			unlink(path, callback) { callback(enosys()); },
+			utimes(path, atime, mtime, callback) { callback(enosys()); },
+		};
+	}
+
+	if (!global.process) {
+		global.process = {
+			getuid() { return -1; },
+			getgid() { return -1; },
+			geteuid() { return -1; },
+			getegid() { return -1; },
+			getgroups() { throw enosys(); },
+			pid: -1,
+			ppid: -1,
+			umask() { throw enosys(); },
+			cwd() { throw enosys(); },
+			chdir() { throw enosys(); },
+		}
+	}
+
+	if (!global.crypto) {
+		const nodeCrypto = require("node:crypto");
+		global.crypto = {
+			getRandomValues(b) {
+				nodeCrypto.randomFillSync(b);
+			},
+		};
+	}
+
+	if (!global.performance) {
+		global.performance = {
+			now() {
+				const [sec, nsec] = process.hrtime();
+				return sec * 1000 + nsec / 1000000;
+			},
+		};
+	}
+
+	if (!global.TextEncoder) {
+		global.TextEncoder = require("node:util").TextEncoder;
+	}
+
+	if (!global.TextDecoder) {
+		global.TextDecoder = require("node:util").TextDecoder;
+	}
+
+	// End of polyfills for common API.
+
+	const encoder = new TextEncoder("utf-8");
+	const decoder = new TextDecoder("utf-8");
+	let reinterpretBuf = new DataView(new ArrayBuffer(8));
+	var logLine = [];
+	const wasmExit = {}; // thrown to exit via proc_exit (not an error)
+
+	global.Go = class {
+		constructor() {
+			this._callbackTimeouts = new Map();
+			this._nextCallbackTimeoutID = 1;
+
+			const mem = () => {
+				// The buffer may change when requesting more memory.
+				return new DataView(this._inst.exports.memory.buffer);
+			}
+
+			const unboxValue = (v_ref) => {
+				reinterpretBuf.setBigInt64(0, v_ref, true);
+				const f = reinterpretBuf.getFloat64(0, true);
+				if (f === 0) {
+					return undefined;
+				}
+				if (!isNaN(f)) {
+					return f;
+				}
+
+				const id = v_ref & 0xffffffffn;
+				return this._values[id];
+			}
+
+
+			const loadValue = (addr) => {
+				let v_ref = mem().getBigUint64(addr, true);
+				return unboxValue(v_ref);
+			}
+
+			const boxValue = (v) => {
+				const nanHead = 0x7FF80000n;
+
+				if (typeof v === "number") {
+					if (isNaN(v)) {
+						return nanHead << 32n;
+					}
+					if (v === 0) {
+						return (nanHead << 32n) | 1n;
+					}
+					reinterpretBuf.setFloat64(0, v, true);
+					return reinterpretBuf.getBigInt64(0, true);
+				}
+
+				switch (v) {
+					case undefined:
+						return 0n;
+					case null:
+						return (nanHead << 32n) | 2n;
+					case true:
+						return (nanHead << 32n) | 3n;
+					case false:
+						return (nanHead << 32n) | 4n;
+				}
+
+				let id = this._ids.get(v);
+				if (id === undefined) {
+					id = this._idPool.pop();
+					if (id === undefined) {
+						id = BigInt(this._values.length);
+					}
+					this._values[id] = v;
+					this._goRefCounts[id] = 0;
+					this._ids.set(v, id);
+				}
+				this._goRefCounts[id]++;
+				let typeFlag = 1n;
+				switch (typeof v) {
+					case "string":
+						typeFlag = 2n;
+						break;
+					case "symbol":
+						typeFlag = 3n;
+						break;
+					case "function":
+						typeFlag = 4n;
+						break;
+				}
+				return id | ((nanHead | typeFlag) << 32n);
+			}
+
+			const storeValue = (addr, v) => {
+				let v_ref = boxValue(v);
+				mem().setBigUint64(addr, v_ref, true);
+			}
+
+			const loadSlice = (array, len, cap) => {
+				return new Uint8Array(this._inst.exports.memory.buffer, array, len);
+			}
+
+			const loadSliceOfValues = (array, len, cap) => {
+				const a = new Array(len);
+				for (let i = 0; i < len; i++) {
+					a[i] = loadValue(array + i * 8);
+				}
+				return a;
+			}
+
+			const loadString = (ptr, len) => {
+				return decoder.decode(new DataView(this._inst.exports.memory.buffer, ptr, len));
+			}
+
+			const timeOrigin = Date.now() - performance.now();
+			this.importObject = {
+				wasi_snapshot_preview1: {
+					// https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#fd_write
+					fd_write: function(fd, iovs_ptr, iovs_len, nwritten_ptr) {
+						let nwritten = 0;
+						if (fd == 1) {
+							for (let iovs_i=0; iovs_i<iovs_len;iovs_i++) {
+								let iov_ptr = iovs_ptr+iovs_i*8; // assuming wasm32
+								let ptr = mem().getUint32(iov_ptr + 0, true);
+								let len = mem().getUint32(iov_ptr + 4, true);
+								nwritten += len;
+								for (let i=0; i<len; i++) {
+									let c = mem().getUint8(ptr+i);
+									if (c == 13) { // CR
+										// ignore
+									} else if (c == 10) { // LF
+										// write line
+										let line = decoder.decode(new Uint8Array(logLine));
+										logLine = [];
+										console.log(line);
+									} else {
+										logLine.push(c);
+									}
+								}
+							}
+						} else {
+							console.error('invalid file descriptor:', fd);
+						}
+						mem().setUint32(nwritten_ptr, nwritten, true);
+						return 0;
+					},
+					fd_close: () => 0,      // dummy
+					fd_fdstat_get: () => 0, // dummy
+					fd_seek: () => 0,       // dummy
+					proc_exit: (code) => {
+						this.exited = true;
+						this.exitCode = code;
+						this._resolveExitPromise();
+						throw wasmExit;
+					},
+					random_get: (bufPtr, bufLen) => {
+						crypto.getRandomValues(loadSlice(bufPtr, bufLen));
+						return 0;
+					},
+				},
+				gojs: {
+					// func ticks() float64
+					"runtime.ticks": () => {
+						return timeOrigin + performance.now();
+					},
+
+					// func sleepTicks(timeout float64)
+					"runtime.sleepTicks": (timeout) => {
+						// Do not sleep, only reactivate scheduler after the given timeout.
+						setTimeout(() => {
+							if (this.exited) return;
+							try {
+								this._inst.exports.go_scheduler();
+							} catch (e) {
+								if (e !== wasmExit) throw e;
+							}
+						}, timeout);
+					},
+
+					// func finalizeRef(v ref)
+					"syscall/js.finalizeRef": (v_ref) => {
+						// Note: TinyGo does not support finalizers so this is only called
+						// for one specific case, by js.go:jsString. and can/might leak memory.
+						const id = v_ref & 0xffffffffn;
+						if (this._goRefCounts?.[id] !== undefined) {
+							this._goRefCounts[id]--;
+							if (this._goRefCounts[id] === 0) {
+								const v = this._values[id];
+								this._values[id] = null;
+								this._ids.delete(v);
+								this._idPool.push(id);
+							}
+						} else {
+							console.error("syscall/js.finalizeRef: unknown id", id);
+						}
+					},
+
+					// func stringVal(value string) ref
+					"syscall/js.stringVal": (value_ptr, value_len) => {
+						value_ptr >>>= 0;
+						const s = loadString(value_ptr, value_len);
+						return boxValue(s);
+					},
+
+					// func valueGet(v ref, p string) ref
+					"syscall/js.valueGet": (v_ref, p_ptr, p_len) => {
+						let prop = loadString(p_ptr, p_len);
+						let v = unboxValue(v_ref);
+						let result = Reflect.get(v, prop);
+						return boxValue(result);
+					},
+
+					// func valueSet(v ref, p string, x ref)
+					"syscall/js.valueSet": (v_ref, p_ptr, p_len, x_ref) => {
+						const v = unboxValue(v_ref);
+						const p = loadString(p_ptr, p_len);
+						const x = unboxValue(x_ref);
+						Reflect.set(v, p, x);
+					},
+
+					// func valueDelete(v ref, p string)
+					"syscall/js.valueDelete": (v_ref, p_ptr, p_len) => {
+						const v = unboxValue(v_ref);
+						const p = loadString(p_ptr, p_len);
+						Reflect.deleteProperty(v, p);
+					},
+
+					// func valueIndex(v ref, i int) ref
+					"syscall/js.valueIndex": (v_ref, i) => {
+						return boxValue(Reflect.get(unboxValue(v_ref), i));
+					},
+
+					// valueSetIndex(v ref, i int, x ref)
+					"syscall/js.valueSetIndex": (v_ref, i, x_ref) => {
+						Reflect.set(unboxValue(v_ref), i, unboxValue(x_ref));
+					},
+
+					// func valueCall(v ref, m string, args []ref) (ref, bool)
+					"syscall/js.valueCall": (ret_addr, v_ref, m_ptr, m_len, args_ptr, args_len, args_cap) => {
+						const v = unboxValue(v_ref);
+						const name = loadString(m_ptr, m_len);
+						const args = loadSliceOfValues(args_ptr, args_len, args_cap);
+						try {
+							const m = Reflect.get(v, name);
+							storeValue(ret_addr, Reflect.apply(m, v, args));
+							mem().setUint8(ret_addr + 8, 1);
+						} catch (err) {
+							storeValue(ret_addr, err);
+							mem().setUint8(ret_addr + 8, 0);
+						}
+					},
+
+					// func valueInvoke(v ref, args []ref) (ref, bool)
+					"syscall/js.valueInvoke": (ret_addr, v_ref, args_ptr, args_len, args_cap) => {
+						try {
+							const v = unboxValue(v_ref);
+							const args = loadSliceOfValues(args_ptr, args_len, args_cap);
+							storeValue(ret_addr, Reflect.apply(v, undefined, args));
+							mem().setUint8(ret_addr + 8, 1);
+						} catch (err) {
+							storeValue(ret_addr, err);
+							mem().setUint8(ret_addr + 8, 0);
+						}
+					},
+
+					// func valueNew(v ref, args []ref) (ref, bool)
+					"syscall/js.valueNew": (ret_addr, v_ref, args_ptr, args_len, args_cap) => {
+						const v = unboxValue(v_ref);
+						const args = loadSliceOfValues(args_ptr, args_len, args_cap);
+						try {
+							storeValue(ret_addr, Reflect.construct(v, args));
+							mem().setUint8(ret_addr + 8, 1);
+						} catch (err) {
+							storeValue(ret_addr, err);
+							mem().setUint8(ret_addr+ 8, 0);
+						}
+					},
+
+					// func valueLength(v ref) int
+					"syscall/js.valueLength": (v_ref) => {
+						return unboxValue(v_ref).length;
+					},
+
+					// valuePrepareString(v ref) (ref, int)
+					"syscall/js.valuePrepareString": (ret_addr, v_ref) => {
+						const s = String(unboxValue(v_ref));
+						const str = encoder.encode(s);
+						storeValue(ret_addr, str);
+						mem().setInt32(ret_addr + 8, str.length, true);
+					},
+
+					// valueLoadString(v ref, b []byte)
+					"syscall/js.valueLoadString": (v_ref, slice_ptr, slice_len, slice_cap) => {
+						const str = unboxValue(v_ref);
+						loadSlice(slice_ptr, slice_len, slice_cap).set(str);
+					},
+
+					// func valueInstanceOf(v ref, t ref) bool
+					"syscall/js.valueInstanceOf": (v_ref, t_ref) => {
+ 						return unboxValue(v_ref) instanceof unboxValue(t_ref);
+					},
+
+					// func copyBytesToGo(dst []byte, src ref) (int, bool)
+					"syscall/js.copyBytesToGo": (ret_addr, dest_addr, dest_len, dest_cap, src_ref) => {
+						let num_bytes_copied_addr = ret_addr;
+						let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
+
+						const dst = loadSlice(dest_addr, dest_len);
+						const src = unboxValue(src_ref);
+						if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
+							mem().setUint8(returned_status_addr, 0); // Return "not ok" status
+							return;
+						}
+						const toCopy = src.subarray(0, dst.length);
+						dst.set(toCopy);
+						mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
+						mem().setUint8(returned_status_addr, 1); // Return "ok" status
+					},
+
+					// copyBytesToJS(dst ref, src []byte) (int, bool)
+					// Originally copied from upstream Go project, then modified:
+					//   https://github.com/golang/go/blob/3f995c3f3b43033013013e6c7ccc93a9b1411ca9/misc/wasm/wasm_exec.js#L404-L416
+					"syscall/js.copyBytesToJS": (ret_addr, dst_ref, src_addr, src_len, src_cap) => {
+						let num_bytes_copied_addr = ret_addr;
+						let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
+
+						const dst = unboxValue(dst_ref);
+						const src = loadSlice(src_addr, src_len);
+						if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
+							mem().setUint8(returned_status_addr, 0); // Return "not ok" status
+							return;
+						}
+						const toCopy = src.subarray(0, dst.length);
+						dst.set(toCopy);
+						mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
+						mem().setUint8(returned_status_addr, 1); // Return "ok" status
+					},
+				}
+			};
+
+			// Go 1.20 uses 'env'. Go 1.21 uses 'gojs'.
+			// For compatibility, we use both as long as Go 1.20 is supported.
+			this.importObject.env = this.importObject.gojs;
+		}
+
+		async run(instance) {
+			this._inst = instance;
+			this._values = [ // JS values that Go currently has references to, indexed by reference id
+				NaN,
+				0,
+				null,
+				true,
+				false,
+				global,
+				this,
+			];
+			this._goRefCounts = []; // number of references that Go has to a JS value, indexed by reference id
+			this._ids = new Map();  // mapping from JS values to reference ids
+			this._idPool = [];      // unused ids that have been garbage collected
+			this.exited = false;    // whether the Go program has exited
+			this.exitCode = 0;
+
+			if (this._inst.exports._start) {
+				let exitPromise = new Promise((resolve, reject) => {
+					this._resolveExitPromise = resolve;
+				});
+
+				// Run program, but catch the wasmExit exception that's thrown
+				// to return back here.
+				try {
+					this._inst.exports._start();
+				} catch (e) {
+					if (e !== wasmExit) throw e;
+				}
+
+				await exitPromise;
+				return this.exitCode;
+			} else {
+				this._inst.exports._initialize();
+			}
+		}
+
+		_resume() {
+			if (this.exited) {
+				throw new Error("Go program has already exited");
+			}
+			try {
+				this._inst.exports.resume();
+			} catch (e) {
+				if (e !== wasmExit) throw e;
+			}
+			if (this.exited) {
+				this._resolveExitPromise();
+			}
+		}
+
+		_makeFuncWrapper(id) {
+			const go = this;
+			return function () {
+				const event = { id: id, this: this, args: arguments };
+				go._pendingEvent = event;
+				go._resume();
+				return event.result;
+			};
+		}
+	}
+
+	if (
+		global.require &&
+		global.require.main === module &&
+		global.process &&
+		global.process.versions &&
+		!global.process.versions.electron
+	) {
+		if (process.argv.length != 3) {
+			console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
+			process.exit(1);
+		}
+
+		const go = new Go();
+		WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then(async (result) => {
+			let exitCode = await go.run(result.instance);
+			process.exit(exitCode);
+		}).catch((err) => {
+			console.error(err);
+			process.exit(1);
+		});
+	}
+})();

playground/svelte.config.js

@@ -0,0 +1,22 @@
+import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
+import adapter from "@sveltejs/adapter-static";
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+  // Consult https://svelte.dev/docs/kit/integrations
+  // for more information about preprocessors
+  preprocess: vitePreprocess(),
+
+  kit: {
+    // adapter-auto only supports some environments, see https://svelte.dev/docs/kit/adapter-auto for a list.
+    // If your environment is not supported, or you settled on a specific environment, switch out the adapter.
+    // See https://svelte.dev/docs/kit/adapters for more information about adapters.
+    adapter: adapter(),
+
+    paths: {
+      base: "/_playground",
+    },
+  },
+};
+
+export default config;

playground/tsconfig.json

@@ -0,0 +1,19 @@
+{
+	"extends": "./.svelte-kit/tsconfig.json",
+	"compilerOptions": {
+		"allowJs": true,
+		"checkJs": true,
+		"esModuleInterop": true,
+		"forceConsistentCasingInFileNames": true,
+		"resolveJsonModule": true,
+		"skipLibCheck": true,
+		"sourceMap": true,
+		"strict": true,
+		"moduleResolution": "bundler"
+	}
+	// Path aliases are handled by https://svelte.dev/docs/kit/configuration#alias
+	// except $lib which is handled by https://svelte.dev/docs/kit/configuration#files
+	//
+	// To make changes to top-level options such as include and exclude, we recommend extending
+	// the generated config; see https://svelte.dev/docs/kit/configuration#typescript
+}

playground/vite.config.ts

@@ -0,0 +1,14 @@
+import tailwindcss from "@tailwindcss/vite";
+import { sveltekit } from "@sveltejs/kit/vite";
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  plugins: [tailwindcss(), sveltekit()],
+  optimizeDeps: {
+    exclude: [
+      "svelte-codemirror-editor",
+      "codemirror",
+      "@codemirror/language",
+    ],
+  },
+});

playground/wasm/build.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+OUT_DIR="$SCRIPT_DIR/../static"
+OUT_WASM="$OUT_DIR/main.wasm"
+
+mkdir -p "$OUT_DIR"
+
+tinygo build -target=wasm \
+  -no-debug -panic=print -gc=leaking \
+  -o "$OUT_WASM" "$SCRIPT_DIR"
+
+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 "$OUT_WASM"
+
+cp -f "$(tinygo env TINYGOROOT)/targets/wasm_exec.js" "$OUT_DIR/wasm_exec.js"

playground/wasm/go.mod

@@ -0,0 +1,3 @@
+module git.max-richter.dev/max/marka/playground-wasm
+
+go 1.24.7

playground/wasm/main.go

@@ -0,0 +1,115 @@
+//go:build js && wasm
+
+package main
+
+import (
+	"encoding/json"
+	"syscall/js"
+
+	p "git.max-richter.dev/max/marka/parser"
+	"git.max-richter.dev/max/marka/registry"
+	"git.max-richter.dev/max/marka/template"
+)
+
+func wrapError(err error) string {
+	errMap := map[string]any{"error": err.Error()}
+	errJSON, _ := json.Marshal(errMap)
+	return string(errJSON)
+}
+
+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 wrapError(err)
+	}
+	jsonString, _ := json.Marshal(matched)
+	return string(jsonString)
+}
+
+func DetectType(this js.Value, args []js.Value) any {
+	markdown := args[0].String()
+	t, err := p.DetectType(markdown)
+	if err != nil {
+		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 wrapError(err)
+	}
+	return string(b)
+}
+
+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 wrapError(err)
+	}
+	b, err := json.Marshal(res)
+	if err != nil {
+		return wrapError(err)
+	}
+	return string(b)
+}
+
+func ListTemplates(this js.Value, args []js.Value) any {
+	templates, err := registry.ListTemplates()
+	if err != nil {
+		return wrapError(err)
+	}
+	b, err := json.Marshal(templates)
+	if err != nil {
+		return wrapError(err)
+	}
+	return string(b)
+}
+
+func GetTemplate(this js.Value, args []js.Value) any {
+	name := args[0].String()
+	template, err := registry.GetTemplate(name)
+	if err != nil {
+		return wrapError(err)
+	}
+	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() {
+	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 {}
+}

registry/go.mod

@@ -1,3 +1,3 @@
 module git.max-richter.dev/max/marka/registry
 
-go 1.24.5
+go 1.24.7

registry/templates.go

@@ -4,6 +4,9 @@ package registry
 import (
 	"embed"
 	"io"
+	"io/fs"
+	"path/filepath"
+	"strings"
 )
 
 //go:embed templates/*.marka
@@ -23,3 +26,20 @@ func GetTemplate(name string) (string, error) {
 
 	return string(templateBytes), nil
 }
+
+func ListTemplates() ([]string, error) {
+	var templateNames []string
+	err := fs.WalkDir(templates, ".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if !d.IsDir() && strings.HasSuffix(path, ".marka") {
+			templateNames = append(templateNames, strings.TrimSuffix(filepath.Base(path), ".marka"))
+		}
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return templateNames, nil
+}

registry/templates/Article.marka

@@ -3,20 +3,18 @@
   path: .
   codec: yaml
   fields:
-    - path: "@context"
+    - path: "_schema"
-      codec: const
-      value: https://schema.org
-      hidden: true
-    - path: "@schema"
       codec: const
       value: Article
       hidden: true
-    - path: "@type"
+    - path: "_type"
       codec: const
       value: Article
     - path: image
+    - path: about
+    - path: url
     - path: author.name
-    - path: author.@type
+    - path: author._type
       codec: const
       value: Person
       hidden: true
@@ -26,16 +24,13 @@
       pathAlias: rating
     - path: reviewRating.bestRating
       codec: const
-      value: 5
       hidden: true
     - path: reviewRating.worstRating
       codec: const
-      value: 1
       hidden: true
 }
 ---
 
 # { headline }
-{ keywords | hashtags }
 
 { articleBody }

registry/templates/Recipe.marka

@@ -3,19 +3,16 @@
   path: .
   codec: yaml
   fields:
-    - path: "@context"
+    - path: "_schema"
-      codec: const
-      value: https://schema.org
-      hidden: true
-    - path: "@schema"
       codec: const
       value: Recipe
       hidden: true
-    - path: "@type"
+    - path: "_type"
       codec: const
       value: Recipe
+    - path: link
     - path: image
-    - path: author.@type
+    - path: author._type
       codec: const
       hidden: true
       value: Person
@@ -33,7 +30,6 @@
 ---
 
 # { name | text }
-{ keywords | hashtags }
 
 { description | text }
 

registry/templates/Review.marka

@@ -3,21 +3,17 @@
   path: .
   codec: yaml
   fields:
-    - path: "@context"
+    - path: "_schema"
-      codec: const
-      value: https://schema.org
-      hidden: true
-    - path: "@schema"
       codec: const
       value: Review
       hidden: true
-    - path: "@type"
+    - path: "_type"
       codec: const
       value: Review
     - path: tmdbId
     - path: image
     - path: author.name
-    - path: author.@type
+    - path: author._type
       codec: const
       value: Person
       hidden: true

registry/templates/_default.marka

@@ -3,6 +3,6 @@
   path: .
   codec: yaml
   fields:
-    - path: "@type"
+    - path: "_type"
 }
 ---

renderer/encoders/encoders.go

@@ -13,8 +13,7 @@ import (
 const emptyBlock = "\uE000"
 
 func fixRenderedBlock(input string) string {
-	input = strings.ReplaceAll(input, "'@type':", "@type:")
+	input = strings.ReplaceAll(input, "'_type':", "_type:")
-	input = strings.ReplaceAll(input, "'@context':", "@context:")
 	if len(input) == 0 {
 		return emptyBlock
 	}

renderer/go.mod

@@ -1,6 +1,6 @@
 module git.max-richter.dev/max/marka/renderer
 
-go 1.24.5
+go 1.24.7
 
 require (
 	git.max-richter.dev/max/marka/parser v0.0.0-20250819170608-69c2550f448e

renderer/renderer.go

@@ -18,10 +18,10 @@ func RenderFile(rawJSON []byte) ([]byte, error) {
 		return nil, fmt.Errorf("failed to parse JSON: %w", err)
 	}
 
-	// 2) extract type from "@type" Property
+	// 2) extract type from "_type" Property
-	contentType, ok := data["@type"].(string)
+	contentType, ok := data["_type"].(string)
 	if !ok || contentType == "" {
-		return nil, fmt.Errorf("JSON does not contain a valid '@type' property")
+		return nil, fmt.Errorf("JSON does not contain a valid '_type' property")
 	}
 
 	// 3) get the template from the registry

renderer/renderer_test.go

@@ -41,10 +41,10 @@ func TestRenderFile_MissingType(t *testing.T) {
 	rawJSON := []byte(`{"name": "Test"}`)
 	_, err := renderer.RenderFile(rawJSON)
 	if err == nil {
-		t.Fatal("expected error for missing @type, got nil")
+		t.Fatal("expected error for missing _type, got nil")
 	}
-	if !strings.Contains(err.Error(), "JSON does not contain a valid '@type' property") {
+	if !strings.Contains(err.Error(), "JSON does not contain a valid '_type' property") {
-		t.Errorf("expected missing @type error, got: %v", err)
+		t.Errorf("expected missing _type error, got: %v", err)
 	}
 }
 

server/.air.toml

@@ -1,6 +1,3 @@
-# Config file for Air - https://github.com/air-verse/air
-# This file is for the marka-server application.
-
 root = "."
 tmp_dir = "tmp"
 

server/Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:1.24.7 AS build
+WORKDIR /src
+COPY . .
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -trimpath -ldflags="-s -w" \
+    -o /out/server ./server/cmd/marka-server
+
+FROM scratch
+WORKDIR /app
+COPY --from=build /out/server /app/server
+COPY --from=build /src/server/playground /app/playground
+USER 65532:65532
+EXPOSE 8080
+CMD ["/app/server","-root=/app/data","-addr=:8080","-playground-root=/app/playground"]
+

server/README.md

@@ -0,0 +1,15 @@
+## Marka Server
+
+
+```json
+{
+  "name": "Recipe",
+  "modTime": 123123123123,
+  "content": [
+    {
+      "name": "Baguette",
+      "modTime": 123123123123,
+    }
+  ]
+}
+```

server/cmd/marka-server/main.go

@@ -6,27 +6,61 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 
-	"git.max-richter.dev/max/marka/server/internal/handlers"
+	"git.max-richter.dev/max/marka/server/internal/adapters"
+	"git.max-richter.dev/max/marka/server/internal/handler"
 )
 
+type multi []string
+
+func (m *multi) String() string { return strings.Join(*m, ",") }
+func (m *multi) Set(v string) error {
+	*m = append(*m, v)
+	return nil
+}
+
 func main() {
-	root := flag.String("root", ".", "filesystem root to serve")
+	var roots multi
+	flag.Var(&roots, "root", "repeatable; specify multiple -root flags")
 	addr := flag.String("addr", ":8080", "listen address")
+	playgroundRoot := flag.String("playground-root", "/app/playground", "path to playground build directory")
 	flag.Parse()
 
-	absRoot, err := filepath.Abs(*root)
+	if *playgroundRoot != "" {
-	must(err)
+		absPlaygroundRoot, err := filepath.Abs(*playgroundRoot)
-
+		must(err)
-	info, err := os.Stat(absRoot)
+		info, err := os.Stat(absPlaygroundRoot)
-	must(err)
+		must(err)
-	if !info.IsDir() {
+		if !info.IsDir() {
-		log.Fatal("root is not a directory")
+			log.Fatalf("playground-root %s is not a directory", *playgroundRoot)
+		}
+		log.Printf("serving playground from %s", absPlaygroundRoot)
+		http.Handle("/_playground/", http.StripPrefix("/_playground/", http.FileServer(http.Dir(absPlaygroundRoot))))
 	}
 
-	http.Handle("/", handlers.NewFile(absRoot))
+	if len(roots) == 0 {
+		log.Fatal("at least one -root flag must be specified")
+	}
 
-	log.Printf("listening on %s, root=%s", *addr, absRoot)
+	absRoots := make([]string, len(roots))
+	for i, r := range roots {
+		abs, err := filepath.Abs(r)
+		must(err)
+		info, err := os.Stat(abs)
+		must(err)
+		if !info.IsDir() {
+			log.Fatalf("root %s is not a directory", r)
+		}
+		absRoots[i] = abs
+	}
+
+	fsAdapter, err := adapters.NewLocalFsAdapter(absRoots)
+	must(err)
+
+	http.Handle("/", handler.NewHandler(fsAdapter))
+
+	log.Printf("listening on %s, roots=%s", *addr, strings.Join(absRoots, ", "))
 	log.Fatal(http.ListenAndServe(*addr, nil))
 }
 

server/go.mod

@@ -1,14 +1,13 @@
 module git.max-richter.dev/max/marka/server
 
-go 1.24.5
+go 1.24.7
 
-require git.max-richter.dev/max/marka/parser v0.0.0-20250819170608-69c2550f448e
+require git.max-richter.dev/max/marka/parser v0.0.0-20251003194139-ab81c980b590
 
 require (
 	git.max-richter.dev/max/marka/registry v0.0.0-20250817132016-6db87db32567 // indirect
 	git.max-richter.dev/max/marka/renderer v0.0.0-20250819170608-69c2550f448e // indirect
 	git.max-richter.dev/max/marka/template v0.0.0-20250817132016-6db87db32567 // indirect
-	git.max-richter.dev/max/marka/testdata v0.0.0-20250819195334-b3c01bb43d9a // indirect
 	github.com/agext/levenshtein v1.2.3 // indirect
 	github.com/santhosh-tekuri/jsonschema/v6 v6.0.2 // indirect
 	go.yaml.in/yaml/v4 v4.0.0-rc.1 // indirect

server/go.sum

@@ -1,5 +1,5 @@
-git.max-richter.dev/max/marka/parser v0.0.0-20250819170608-69c2550f448e h1:enZufetD3UoIVTnTNTQSFlr1Ir0jG7wObUAxb6+xwWg=
+git.max-richter.dev/max/marka/parser v0.0.0-20251003194139-ab81c980b590 h1:4C3b/KHD7+ru7nunpYIY6snVw+RI1QeVk9XcbzmdVY0=
-git.max-richter.dev/max/marka/parser v0.0.0-20250819170608-69c2550f448e/go.mod h1:xQK6tsgr9BOoeFw8JxjBwDkVENlOqapmcRkYyf/L+SQ=
+git.max-richter.dev/max/marka/parser v0.0.0-20251003194139-ab81c980b590/go.mod h1:ykBvG4AW+fNFila0ZO2TlBqsCACYKb0AJaHsAopyRVI=
 git.max-richter.dev/max/marka/registry v0.0.0-20250817132016-6db87db32567 h1:oe7Xb8dE43S8mRla5hfEqagMnvhvEVHsvRlzl2v540w=
 git.max-richter.dev/max/marka/registry v0.0.0-20250817132016-6db87db32567/go.mod h1:qGWl42P8mgEktfor/IjQp0aS9SqmpeIlhSuVTlUOXLQ=
 git.max-richter.dev/max/marka/renderer v0.0.0-20250819170608-69c2550f448e h1:9Eg81l8YMTXWZC3xlZ5L/NJRuK26bksrVtEHyCTV4sM=

server/internal/adapters/errors.go

@@ -0,0 +1,5 @@
+package adapters
+
+import "errors"
+
+var ErrNotFound = errors.New("not found")

server/internal/adapters/fs.go

@@ -0,0 +1,266 @@
+package adapters
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
+
+	"git.max-richter.dev/max/marka/parser"
+)
+
+type LocalFsAdapter struct {
+	roots []string
+	cache map[string]*Entry
+	mu    sync.RWMutex
+}
+
+func (l *LocalFsAdapter) readDir(path string, root string) (*Entry, error) {
+	dirInfo, err := os.Stat(path)
+	if err != nil {
+		return nil, err
+	}
+
+	entries, err := os.ReadDir(path)
+	if err != nil {
+		return nil, err
+	}
+
+	out := make([]*Entry, 0, len(entries))
+	for _, e := range entries {
+		info, _ := e.Info()
+
+		entryType := "dir"
+		if !e.IsDir() {
+			entryType = "file"
+		}
+
+		var content any
+		var mime string
+		var size int64
+		if !e.IsDir() {
+			mime = contentTypeFor(e.Name())
+			if info != nil {
+				size = info.Size()
+			}
+			if mime == "application/markdown" {
+				entryPath := filepath.Join(path, e.Name())
+				fileContent, err := os.ReadFile(entryPath)
+				if err == nil {
+					parsedContent, err := parser.ParseFile(string(fileContent))
+					if err == nil {
+						content = parsedContent
+					}
+				}
+			}
+		}
+
+		childPath, err := filepath.Rel(root, filepath.Join(path, e.Name()))
+		if err != nil {
+			return nil, err
+		}
+		responseChildPath := "/" + filepath.ToSlash(filepath.Join(filepath.Base(root), childPath))
+
+		out = append(out, &Entry{
+			Name:    e.Name(),
+			Path:    responseChildPath,
+			Type:    entryType,
+			ModTime: info.ModTime(),
+			MIME:    mime,
+			Size:    size,
+			Content: content,
+		})
+	}
+
+	relPath, err := filepath.Rel(root, path)
+	if err != nil {
+		return nil, err
+	}
+	if relPath == "." {
+		relPath = ""
+	}
+
+	responsePath := "/" + filepath.ToSlash(filepath.Join(filepath.Base(root), relPath))
+
+	return &Entry{
+		Type:    "dir",
+		Name:    filepath.Base(responsePath),
+		Path:    responsePath,
+		ModTime: dirInfo.ModTime(),
+		Content: out,
+	}, nil
+}
+
+func (l *LocalFsAdapter) readFile(path string, root string) (*Entry, error) {
+	fi, err := os.Stat(path)
+	if err != nil {
+		return nil, err
+	}
+
+	relPath, err := filepath.Rel(root, path)
+	if err != nil {
+		return nil, err
+	}
+
+	responsePath := "/" + filepath.ToSlash(filepath.Join(filepath.Base(root), relPath))
+	mime := contentTypeFor(path)
+	var content any
+
+	fileContent, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	if mime == "application/markdown" {
+		parsedContent, err := parser.ParseFile(string(fileContent))
+		if err == nil {
+			content = parsedContent
+		} else {
+			// Fallback to raw content on parsing error
+			content = fileContent
+		}
+	} else {
+		content = fileContent
+	}
+
+	return &Entry{
+		Type:    "file",
+		Name:    fi.Name(),
+		Path:    responsePath,
+		ModTime: fi.ModTime(),
+		MIME:    mime,
+		Size:    fi.Size(),
+		Content: content,
+	}, nil
+}
+
+func (l *LocalFsAdapter) Read(path string) (*Entry, error) {
+	if path == "/" {
+		var latestModTime time.Time
+		for _, r := range l.roots {
+			info, err := os.Stat(r)
+			if err != nil {
+				continue
+			}
+			if info.ModTime().After(latestModTime) {
+				latestModTime = info.ModTime()
+			}
+		}
+
+		l.mu.RLock()
+		cached, found := l.cache[path]
+		l.mu.RUnlock()
+
+		if found && !latestModTime.After(cached.ModTime) {
+			return cached, nil
+		}
+
+		entries := make([]*Entry, 0, len(l.roots))
+		for _, r := range l.roots {
+			info, err := os.Stat(r)
+			if err != nil {
+				continue
+			}
+			name := filepath.Base(r)
+			entries = append(entries, &Entry{
+				Name:    name,
+				Path:    "/" + name,
+				Type:    "dir",
+				ModTime: info.ModTime(),
+			})
+		}
+
+		entry := &Entry{
+			Type:    "dir",
+			Name:    "/",
+			Path:    "/",
+			ModTime: latestModTime,
+			Content: entries,
+		}
+
+		l.mu.Lock()
+		l.cache[path] = entry
+		l.mu.Unlock()
+		return entry, nil
+	}
+
+	pathParts := strings.Split(strings.Trim(path, "/"), "/")
+	if len(pathParts) == 0 || pathParts[0] == "" {
+		return nil, ErrNotFound
+	}
+
+	rootIdentifier := pathParts[0]
+	var targetRoot string
+	for _, r := range l.roots {
+		if filepath.Base(r) == rootIdentifier {
+			targetRoot = r
+			break
+		}
+	}
+
+	if targetRoot == "" {
+		return nil, ErrNotFound
+	}
+
+	subPath := filepath.Join(pathParts[1:]...)
+	target := filepath.Join(targetRoot, subPath)
+
+	absTarget, err := filepath.Abs(target)
+	if err != nil {
+		return nil, err
+	}
+	absRoot, err := filepath.Abs(targetRoot)
+	if err != nil {
+		return nil, err
+	}
+	if !strings.HasPrefix(absTarget, absRoot) {
+		return nil, errors.New("path escapes root")
+	}
+
+	fi, err := os.Stat(target)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, ErrNotFound
+		}
+
+		return nil, err
+	}
+
+	l.mu.RLock()
+	cached, found := l.cache[path]
+	l.mu.RUnlock()
+
+	if found && !fi.ModTime().After(cached.ModTime) {
+		return cached, nil
+	}
+
+	var newEntry *Entry
+	if fi.IsDir() {
+		newEntry, err = l.readDir(target, targetRoot)
+	} else {
+		newEntry, err = l.readFile(target, targetRoot)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	l.mu.Lock()
+	l.cache[path] = newEntry
+	l.mu.Unlock()
+
+	return newEntry, nil
+}
+
+func (l *LocalFsAdapter) Write(path string, content []byte) error {
+	return nil
+}
+
+func NewLocalFsAdapter(roots []string) (FileAdapter, error) {
+	return &LocalFsAdapter{
+		roots: roots,
+		cache: make(map[string]*Entry),
+	}, nil
+}

server/internal/adapters/fs_utils.go

@@ -1,34 +1,14 @@
-package fsx
+package adapters
 
 import (
 	"errors"
+	"mime"
 	"path/filepath"
 	"strings"
 )
 
-func CleanURLLike(p string) string {
-	p = strings.TrimSpace(p)
-	if p == "" || p == "/" {
-		return "/"
-	}
-	parts := []string{}
-	for seg := range strings.SplitSeq(strings.ReplaceAll(p, "/", "/"), "/") {
-		switch seg {
-		case "", ".":
-			continue
-		case "..":
-			if len(parts) > 0 {
-				parts = parts[:len(parts)-1]
-			}
-		default:
-			parts = append(parts, seg)
-		}
-	}
-	return "/" + strings.Join(parts, "/")
-}
-
 func SafeRel(root, requested string) (string, error) {
-	s := CleanURLLike(requested)
+	s := requested
 	if after, ok := strings.CutPrefix(s, "/"); ok {
 		s = after
 	}
@@ -54,3 +34,29 @@ func ResponsePath(root, full string) string {
 	}
 	return "/" + filepath.ToSlash(rel)
 }
+
+var textPlainExtensions = map[string]bool{
+	".txt":  true,
+	".log":  true,
+	".json": true,
+	".yaml": true,
+	".yml":  true,
+	".toml": true,
+	".xml":  true,
+	".csv":  true,
+}
+
+func contentTypeFor(name string) string {
+	ext := strings.ToLower(filepath.Ext(name))
+	switch ext {
+	case ".md", ".markdown", ".mdown":
+		return "application/markdown"
+	}
+	if ct := mime.TypeByExtension(ext); ct != "" {
+		return ct
+	}
+	if textPlainExtensions[ext] {
+		return "text/plain; charset=utf-8"
+	}
+	return "application/octet-stream"
+}

server/internal/adapters/interface.go

@@ -0,0 +1,28 @@
+// Package adapters are the backend to that connects the marka server to a storage
+package adapters
+
+import "time"
+
+// Entry represents a file or directory in the filesystem.
+type Entry struct {
+	Type    string    `json:"type"`              // "file" | "dir"
+	Name    string    `json:"name"`              // base name
+	Path    string    `json:"path"`              // full path or virtual path
+	ModTime time.Time `json:"modTime"`           // last modified
+
+	// File-only (optional)
+	MIME string `json:"mime,omitempty"` // e.g. "text/markdown"
+	Size int64  `json:"size,omitempty"` // bytes
+
+	// Content:
+	// - markdown file: any (parsed AST / arbitrary JSON)
+	// - directory: []*Entry (children)
+	// - other files: omitted
+	Content any `json:"content,omitempty"`
+}
+
+// FileAdapter is the interface for accessing the file system.
+type FileAdapter interface {
+	Read(path string) (*Entry, error)
+	Write(path string, content []byte) error
+}

server/internal/fsx/contenttype.go

@@ -1,33 +0,0 @@
-package fsx
-
-import (
-	"mime"
-	"path/filepath"
-	"strings"
-)
-
-var textPlainExtensions = map[string]bool{
-	".txt":  true,
-	".log":  true,
-	".json": true,
-	".yaml": true,
-	".yml":  true,
-	".toml": true,
-	".xml":  true,
-	".csv":  true,
-}
-
-func ContentTypeFor(name string) string {
-	ext := strings.ToLower(filepath.Ext(name))
-	switch ext {
-	case ".md", ".markdown", ".mdown":
-		return "application/markdown"
-	}
-	if ct := mime.TypeByExtension(ext); ct != "" {
-		return ct
-	}
-	if textPlainExtensions[ext] {
-		return "text/plain; charset=utf-8"
-	}
-	return "application/octet-stream"
-}

server/internal/handler/error.go

@@ -1,4 +1,4 @@
-package httpx
+package handler
 
 import (
 	"encoding/json"
@@ -9,12 +9,12 @@ type ErrorResponse struct {
 	Error string `json:"error"`
 }
 
-func WriteJSON(w http.ResponseWriter, code int, v any) {
+func writeError(w http.ResponseWriter, code int, err error) {
+	writeJSON(w, code, ErrorResponse{Error: err.Error()})
+}
+
+func writeJSON(w http.ResponseWriter, code int, v any) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(code)
 	_ = json.NewEncoder(w).Encode(v)
 }
-
-func WriteError(w http.ResponseWriter, code int, err error) {
-	WriteJSON(w, code, ErrorResponse{Error: err.Error()})
-}

server/internal/handler/handler.go

@@ -0,0 +1,72 @@
+// Package handler provides the HTTP handler for the marka server
+package handler
+
+import (
+	"errors"
+	"net/http"
+
+	"git.max-richter.dev/max/marka/server/internal/adapters"
+)
+
+type Handler struct {
+	adapter adapters.FileAdapter
+}
+
+func (h *Handler) get(w http.ResponseWriter, target string) {
+	entry, err := h.adapter.Read(target)
+	if err != nil {
+		if errors.Is(err, adapters.ErrNotFound) {
+			writeError(w, http.StatusNotFound, err)
+			return
+		}
+		writeError(w, http.StatusInternalServerError, err)
+		return
+	}
+
+	if entry.Type == "file" {
+		// For non-markdown files, content is []byte, write it directly
+		if contentBytes, ok := entry.Content.([]byte); ok {
+			w.Header().Set("Content-Type", entry.MIME)
+			w.Write(contentBytes)
+			return
+		}
+		// For markdown files, content is parsed, return the whole Entry as JSON
+		writeJSON(w, http.StatusOK, entry)
+		return
+	}
+
+	// For directories, return the whole Entry as JSON
+	if entry.Type == "dir" {
+		writeJSON(w, http.StatusOK, entry)
+		return
+	}
+
+	writeError(w, http.StatusInternalServerError, errors.New("unknown entry type"))
+}
+
+func (h *Handler) post(w http.ResponseWriter, target string) {
+}
+
+func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	reqPath := r.URL.Path
+	if reqPath == "" {
+		reqPath = "/"
+	}
+
+	target := cleanURLLike(reqPath)
+
+	switch r.Method {
+	case http.MethodGet:
+		h.get(w, target)
+	case http.MethodPost:
+		h.post(w, target)
+	default:
+		writeError(w, http.StatusMethodNotAllowed, errors.New("method not allowed"))
+	}
+}
+
+func NewHandler(adapter adapters.FileAdapter) http.Handler {
+	return &Handler{
+		adapter: adapter,
+	}
+}

server/internal/handler/utils.go

@@ -0,0 +1,24 @@
+package handler
+
+import "strings"
+
+func cleanURLLike(p string) string {
+	p = strings.TrimSpace(p)
+	if p == "" || p == "/" {
+		return "/"
+	}
+	parts := []string{}
+	for seg := range strings.SplitSeq(p, "/") {
+		switch seg {
+		case "", ".":
+			continue
+		case "..":
+			if len(parts) > 0 {
+				parts = parts[:len(parts)-1]
+			}
+		default:
+			parts = append(parts, seg)
+		}
+	}
+	return "/" + strings.Join(parts, "/")
+}

server/internal/handlers/file.go

@@ -1,38 +0,0 @@
-// Package handlers provides HTTP handlers for the file system.
-package handlers
-
-import (
-	"errors"
-	"net/http"
-	"path/filepath"
-
-	"git.max-richter.dev/max/marka/server/internal/fsx"
-	"git.max-richter.dev/max/marka/server/internal/httpx"
-)
-
-type File struct{ root string }
-
-func NewFile(root string) http.Handler { return &File{root: root} }
-
-func (h *File) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	reqPath := r.URL.Path
-	if reqPath == "" {
-		reqPath = "/"
-	}
-	cleanRel, err := fsx.SafeRel(h.root, reqPath)
-	if err != nil {
-		httpx.WriteError(w, http.StatusBadRequest, err)
-		return
-	}
-	target := filepath.Join(h.root, filepath.FromSlash(cleanRel))
-
-	switch r.Method {
-	case http.MethodGet:
-		h.get(w, r, target)
-	case http.MethodPost:
-		h.post(w, r, target)
-	default:
-		httpx.WriteError(w, http.StatusMethodNotAllowed, errors.New("method not allowed"))
-	}
-}
-

server/internal/handlers/get.go

@@ -1,93 +0,0 @@
-package handlers
-
-import (
-	"errors"
-	"fmt"
-	"net/http"
-	"os"
-	"path/filepath"
-	"time"
-
-	"git.max-richter.dev/max/marka/server/internal/fsx"
-	"git.max-richter.dev/max/marka/server/internal/httpx"
-)
-
-func (h *File) get(w http.ResponseWriter, r *http.Request, target string) {
-	fi, err := os.Stat(target)
-	if err != nil {
-		if os.IsNotExist(err) {
-			httpx.WriteError(w, http.StatusNotFound, errors.New("not found"))
-		} else {
-			httpx.WriteError(w, http.StatusInternalServerError, err)
-		}
-		return
-	}
-
-	if fi.IsDir() {
-		h.handleDir(w, r, target)
-	} else {
-		h.handleFile(w, r, target, fi)
-	}
-}
-
-func (h *File) handleDir(w http.ResponseWriter, r *http.Request, dirPath string) {
-	entries, err := os.ReadDir(dirPath)
-	if err != nil {
-		httpx.WriteError(w, http.StatusInternalServerError, err)
-		return
-	}
-
-	type item struct {
-		Name    string    `json:"name"`
-		Path    string    `json:"path"`
-		Content any       `json:"content,omitempty"`
-		IsDir   bool      `json:"isDir"`
-		Size    int64     `json:"size"`
-		ModTime time.Time `json:"modTime"`
-	}
-
-	out := make([]item, 0, len(entries))
-	for _, e := range entries {
-		info, _ := e.Info() // As in original, ignore error to get partial info
-		entryPath := filepath.Join(dirPath, e.Name())
-
-		var content any
-		if !e.IsDir() && fsx.ContentTypeFor(e.Name()) == "application/markdown" {
-			content, _ = parseMarkdownFile(entryPath) // As in original, ignore error
-		}
-
-		out = append(out, item{
-			Name:    e.Name(),
-			Path:    fsx.ResponsePath(h.root, entryPath),
-			IsDir:   e.IsDir(),
-			Content: content,
-			Size:    sizeOrZero(info),
-			ModTime: modTimeOrZero(info),
-		})
-	}
-	httpx.WriteJSON(w, http.StatusOK, out)
-}
-
-func (h *File) handleFile(w http.ResponseWriter, r *http.Request, target string, fi os.FileInfo) {
-	contentType := fsx.ContentTypeFor(target)
-
-	if contentType == "application/markdown" {
-		res, err := parseMarkdownFile(target)
-		if err != nil {
-			httpx.WriteError(w, http.StatusInternalServerError, fmt.Errorf("failed to parse markdown: %w", err))
-			return
-		}
-		httpx.WriteJSON(w, http.StatusOK, res)
-		return
-	}
-
-	f, err := os.Open(target)
-	if err != nil {
-		httpx.WriteError(w, http.StatusInternalServerError, err)
-		return
-	}
-	defer f.Close()
-
-	w.Header().Set("Content-Type", contentType)
-	http.ServeContent(w, r, filepath.Base(target), fi.ModTime(), f)
-}

server/internal/handlers/helpers.go

@@ -1,30 +0,0 @@
-package handlers
-
-import (
-	"os"
-	"time"
-
-	"git.max-richter.dev/max/marka/parser"
-)
-
-func parseMarkdownFile(path string) (any, error) {
-	data, err := os.ReadFile(path)
-	if err != nil {
-		return nil, err
-	}
-	return parser.ParseFile(string(data))
-}
-
-func sizeOrZero(fi os.FileInfo) int64 {
-	if fi == nil {
-		return 0
-	}
-	return fi.Size()
-}
-
-func modTimeOrZero(fi os.FileInfo) time.Time {
-	if fi == nil {
-		return time.Time{}
-	}
-	return fi.ModTime()
-}

server/internal/handlers/post.go

@@ -1,47 +0,0 @@
-package handlers
-
-import (
-	"io"
-	"net/http"
-	"os"
-	"path/filepath"
-
-	"git.max-richter.dev/max/marka/server/internal/httpx"
-)
-
-func (h *File) post(w http.ResponseWriter, r *http.Request, target string) {
-	if err := os.MkdirAll(filepath.Dir(target), 0o755); err != nil {
-		httpx.WriteError(w, http.StatusInternalServerError, err)
-		return
-	}
-
-	tmpPath := target + ".tmp~"
-	f, err := os.Create(tmpPath)
-	if err != nil {
-		httpx.WriteError(w, http.StatusInternalServerError, err)
-		return
-	}
-
-	_, copyErr := io.Copy(f, r.Body)
-	closeErr := f.Close()
-
-	if copyErr != nil {
-		os.Remove(tmpPath)
-		httpx.WriteError(w, http.StatusInternalServerError, copyErr)
-		return
-	}
-	if closeErr != nil {
-		os.Remove(tmpPath)
-		httpx.WriteError(w, http.StatusInternalServerError, closeErr)
-		return
-	}
-
-	if err := os.Rename(tmpPath, target); err != nil {
-		os.Remove(tmpPath)
-		httpx.WriteError(w, http.StatusInternalServerError, err)
-		return
-	}
-
-	w.Header().Set("Location", r.URL.Path)
-	w.WriteHeader(http.StatusCreated)
-}

server/internal/httpx/router.go

@@ -1,11 +0,0 @@
-package httpx
-
-import "net/http"
-
-type Router struct{ mux *http.ServeMux }
-
-func NewRouter() *Router                                { return &Router{mux: http.NewServeMux()} }
-func (r *Router) Handle(pattern string, h http.Handler) { r.mux.Handle(pattern, h) }
-func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	r.mux.ServeHTTP(w, req)
-}

server/playground/_app/env.js

@@ -0,0 +1 @@
+export const env={}

server/playground/_app/immutable/assets/2.DQ5mJGGf.css

@@ -0,0 +1 @@
+img.svelte-6uiykz{height:64px;width:64px;aspect-ratio:1;filter:drop-shadow(0px 0px 8px #0002)}.codemirror-wrapper.svelte-3fyul5 .cm-focused{outline:none}.scm-waiting.svelte-3fyul5{position:relative}.scm-waiting__loading.svelte-3fyul5{position:absolute;inset:0;background-color:#ffffff80}.scm-loading.svelte-3fyul5{display:flex;align-items:center;justify-content:center}.scm-loading__spinner.svelte-3fyul5{width:1rem;height:1rem;border-radius:100%;border:solid 2px #000;border-top-color:transparent;margin-right:.75rem;animation:svelte-3fyul5-spin 1s linear infinite}.scm-loading__text.svelte-3fyul5{font-family:sans-serif}.scm-pre.svelte-3fyul5{font-size:.85rem;font-family:monospace;tab-size:2;-moz-tab-size:2;resize:none;pointer-events:none;-webkit-user-select:none;user-select:none;overflow:auto}@keyframes svelte-3fyul5-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#fff}*{box-sizing:border-box}textarea:focus{outline:none}pre{margin:0;font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,Consolas,Courier New,monospace}

server/playground/_app/immutable/chunks/B1lAeocp.js

@@ -0,0 +1,2 @@
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server/playground/_app/immutable/chunks/DsnmJJEf.js

@@ -0,0 +1 @@
+typeof window<"u"&&((window.__svelte??={}).v??=new Set).add("5");

server/playground/_app/immutable/chunks/DyoUZ9Ht.js

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server/playground/_app/immutable/chunks/kadZwC1X.js

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+import{c as d,u as g,a as l,b,r as i,d as m,g as p,e as h,f as v,h as k}from"./bc36GTfJ.js";function x(n=!1){const s=d,e=s.l.u;if(!e)return;let o=()=>h(s.s);if(n){let a=0,t={};const _=v(()=>{let c=!1;const r=s.s;for(const f in r)r[f]!==t[f]&&(t[f]=r[f],c=!0);return c&&a++,a});o=()=>p(_)}e.b.length&&g(()=>{u(s,o),i(e.b)}),l(()=>{const a=b(()=>e.m.map(m));return()=>{for(const t of a)typeof t=="function"&&t()}}),e.a.length&&l(()=>{u(s,o),i(e.a)})}function u(n,s){if(n.l.s)for(const e of n.l.s)p(e);s()}k();export{x as i};

server/playground/_app/immutable/entry/start.DAIBqtaT.js

@@ -0,0 +1 @@
+import{l as o,a as r}from"../chunks/BsPC8ki2.js";export{o as load_css,r as start};

server/playground/_app/immutable/nodes/0.BxuPCyXV.js

@@ -0,0 +1 @@
+import"../chunks/DsnmJJEf.js";import{i as c,j as p,k as a,s as m,l as r,w as _,$ as f,n as u,t as d,m as v,o as g}from"../chunks/bc36GTfJ.js";import{s as h,f as y}from"../chunks/DyOAiIET.js";const b=!0,$=Object.freeze(Object.defineProperty({__proto__:null,prerender:b},Symbol.toStringTag,{value:"Module"}));var j=_(g('<link rel="icon"/> <script src="/_playground/wasm_exec.js"><\/script>',1));function M(o,s){var t=c();p(i=>{var e=j();f.title="Marka Playground";var l=a(e);u(2),d(()=>h(l,"href",y)),r(i,e)});var n=a(t);m(n,()=>s.children??v),r(o,t)}export{M as component,$ as universal};

server/playground/_app/immutable/nodes/1.D9DCRrr8.js

@@ -0,0 +1 @@
+import"../chunks/DsnmJJEf.js";import{i as u}from"../chunks/kadZwC1X.js";import{p as h,o as g,k as l,t as v,l as d,q as x,v as e,x as a,y as _}from"../chunks/bc36GTfJ.js";import{s as o}from"../chunks/B1lAeocp.js";import{s as k,p}from"../chunks/BsPC8ki2.js";const $={get error(){return p.error},get status(){return p.status}};k.updated.check;const m=$;var b=g("<h1> </h1> <p> </p>",1);function z(i,n){h(n,!1),u();var r=b(),t=l(r),c=e(t,!0);a(t);var s=_(t,2),f=e(s,!0);a(s),v(()=>{o(c,m.status),o(f,m.error?.message)}),d(i,r),x()}export{z as component};