Initialize Tauri v2 + React + TypeScript project with vault scanner

- Scaffold Vite + React + TypeScript frontend - Add Tauri v2 backend with Rust - Implement list_vault command: recursively scans .md files, parses YAML frontmatter (Is A, aliases, Belongs to, Related to, Status, Owner, Cadence), extracts title from H1 or filename - 10 passing Rust tests for frontmatter parsing and vault scanning - Configure Vitest and Playwright (test infrastructure) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-14 18:20:07 +01:00
commit 6b53cf8f50
44 changed files with 9192 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,28 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# Playwright
+/test-results/
+/playwright-report/
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -0,0 +1,52 @@
+# CLAUDE.md — Laputa App
+
+## Project
+Laputa App is a personal knowledge and life management desktop app, built with Tauri v2 + React + TypeScript + CodeMirror 6. It reads a vault of markdown files with YAML frontmatter and presents them in a four-panel UI inspired by Bear Notes.
+
+## Tech Stack
+- **Desktop shell**: Tauri v2 (Rust backend)
+- **Frontend**: React 18+ with TypeScript
+- **Editor**: CodeMirror 6 (live preview, reveal-on-focus)
+- **Build**: Vite
+- **Tests**: Vitest (unit), Playwright (E2E), `cargo test` (Rust)
+- **Package manager**: pnpm
+
+## Architecture
+- `src-tauri/` — Rust backend (file I/O, frontmatter parsing, git ops, filesystem watching)
+- `src/` — React frontend
+- Vault path is configurable (not hardcoded) — the app works with "a vault at some path"
+- All data lives in markdown files with YAML frontmatter, git-versioned
+- The app reads/writes these files directly — no database
+
+## Coding Standards
+- Rust: use `serde` for serialization, `gray_matter` or similar for frontmatter parsing
+- TypeScript: strict mode, functional components, hooks
+- Keep components responsive-ready (don't hardcode four-panel layout assumptions)
+- Use Context7 MCP to look up current API docs for Tauri v2, CodeMirror 6, etc.
+
+## How to Work
+
+### Approach
+- **Small steps**: Build one thing at a time. Get it working, test it, commit it. Then move to the next.
+- **Test as you go**: Write tests alongside code, not after. If you build a frontmatter parser, test it immediately with real-world examples before moving on.
+- **Verify constantly**: After each meaningful change, run the relevant tests (`cargo test`, `pnpm test`). Don't stack up a bunch of code and hope it all works.
+- **Commit often**: Each logical unit of work gets its own commit with a clear message. Not one giant commit at the end.
+
+### Testing
+- `pnpm test` runs Vitest (unit tests)
+- `cargo test` runs Rust tests
+- `pnpm test:e2e` runs Playwright (E2E)
+- Every new module should have tests
+- Test with realistic data — use real markdown files with YAML frontmatter, not toy examples
+- Edge cases matter: empty frontmatter, missing fields, malformed YAML, files with no H1 title
+
+### Code Quality
+- Prefer simple, readable code over clever abstractions
+- Don't over-engineer for future features — build what's needed now
+- If something is hacky or temporary, leave a `// TODO:` comment explaining why and what the real solution would be
+- Error handling: don't silently swallow errors. Log them, surface them, or return Result types (Rust)
+
+### When Stuck
+- Use Context7 MCP to look up current API docs (Tauri v2, CodeMirror 6, etc.)
+- If a dependency doesn't work as expected, check its version and docs before trying workarounds
+- If something is genuinely blocked, write what you tried and what failed — don't spin in circles
--- a/README.md
+++ b/README.md
@@ -0,0 +1,73 @@
+# React + TypeScript + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## React Compiler
+
+The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+
+```js
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+
+      // Remove tseslint.configs.recommended and replace with this
+      tseslint.configs.recommendedTypeChecked,
+      // Alternatively, use this for stricter rules
+      tseslint.configs.strictTypeChecked,
+      // Optionally, add this for stylistic rules
+      tseslint.configs.stylisticTypeChecked,
+
+      // Other configs...
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
+
+You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+
+```js
+// eslint.config.js
+import reactX from 'eslint-plugin-react-x'
+import reactDom from 'eslint-plugin-react-dom'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      // Other configs...
+      // Enable lint rules for React
+      reactX.configs['recommended-typescript'],
+      // Enable lint rules for React DOM
+      reactDom.configs.recommended,
+    ],
+    languageOptions: {
+      parserOptions: {
+        project: ['./tsconfig.node.json', './tsconfig.app.json'],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      // other options...
+    },
+  },
+])
+```
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -0,0 +1,23 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import tseslint from 'typescript-eslint'
+import { defineConfig, globalIgnores } from 'eslint/config'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{ts,tsx}'],
+    extends: [
+      js.configs.recommended,
+      tseslint.configs.recommended,
+      reactHooks.configs.flat.recommended,
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+  },
+])
--- a/index.html
+++ b/index.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>laputa-scaffold</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
--- a/package.json
+++ b/package.json
@@ -0,0 +1,41 @@
+{
+  "name": "laputa-app",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview",
+    "tauri": "tauri",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:e2e": "playwright test"
+  },
+  "dependencies": {
+    "@tauri-apps/api": "^2.10.1",
+    "react": "^19.2.0",
+    "react-dom": "^19.2.0"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.1",
+    "@playwright/test": "^1.58.2",
+    "@tauri-apps/cli": "^2.10.0",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@types/node": "^24.10.1",
+    "@types/react": "^19.2.7",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^5.1.1",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.4.24",
+    "globals": "^16.5.0",
+    "jsdom": "^28.0.0",
+    "typescript": "~5.9.3",
+    "typescript-eslint": "^8.48.0",
+    "vite": "^7.3.1",
+    "vitest": "^4.0.18"
+  }
+}
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -0,0 +1,2 @@
+ignoredBuiltDependencies:
+  - esbuild
--- a/public/vite.svg
+++ b/public/vite.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>
--- a/src-tauri/.gitignore
+++ b/src-tauri/.gitignore
@@ -0,0 +1,4 @@
+# Generated by Cargo
+# will have compiled files and executables
+/target/
+/gen/schemas
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -0,0 +1,29 @@
+[package]
+name = "laputa"
+version = "0.1.0"
+description = "Personal knowledge and life management app"
+authors = ["you"]
+license = ""
+repository = ""
+edition = "2021"
+rust-version = "1.77.2"
+
+[lib]
+name = "laputa_lib"
+crate-type = ["staticlib", "cdylib", "rlib"]
+
+[build-dependencies]
+tauri-build = { version = "2.5.4" }
+
+[dependencies]
+serde_json = "1.0"
+serde = { version = "1.0", features = ["derive"] }
+log = "0.4"
+tauri = { version = "2.10.0" }
+tauri-plugin-log = "2"
+gray_matter = "0.2"
+walkdir = "2"
+chrono = { version = "0.4", features = ["serde"] }
+
+[dev-dependencies]
+tempfile = "3"
--- a/src-tauri/build.rs
+++ b/src-tauri/build.rs
@@ -0,0 +1,3 @@
+fn main() {
+  tauri_build::build()
+}
--- a/src-tauri/capabilities/default.json
+++ b/src-tauri/capabilities/default.json
@@ -0,0 +1,11 @@
+{
+  "$schema": "../gen/schemas/desktop-schema.json",
+  "identifier": "default",
+  "description": "enables the default permissions",
+  "windows": [
+    "main"
+  ],
+  "permissions": [
+    "core:default"
+  ]
+}
--- a/src-tauri/icons/128x128.png
+++ b/src-tauri/icons/128x128.png
--- a/src-tauri/icons/128x128@2x.png
+++ b/src-tauri/icons/128x128@2x.png
--- a/src-tauri/icons/32x32.png
+++ b/src-tauri/icons/32x32.png
--- a/src-tauri/icons/Square107x107Logo.png
+++ b/src-tauri/icons/Square107x107Logo.png
--- a/src-tauri/icons/Square142x142Logo.png
+++ b/src-tauri/icons/Square142x142Logo.png
--- a/src-tauri/icons/Square150x150Logo.png
+++ b/src-tauri/icons/Square150x150Logo.png
--- a/src-tauri/icons/Square284x284Logo.png
+++ b/src-tauri/icons/Square284x284Logo.png
--- a/src-tauri/icons/Square30x30Logo.png
+++ b/src-tauri/icons/Square30x30Logo.png
--- a/src-tauri/icons/Square310x310Logo.png
+++ b/src-tauri/icons/Square310x310Logo.png
--- a/src-tauri/icons/Square44x44Logo.png
+++ b/src-tauri/icons/Square44x44Logo.png
--- a/src-tauri/icons/Square71x71Logo.png
+++ b/src-tauri/icons/Square71x71Logo.png
--- a/src-tauri/icons/Square89x89Logo.png
+++ b/src-tauri/icons/Square89x89Logo.png
--- a/src-tauri/icons/StoreLogo.png
+++ b/src-tauri/icons/StoreLogo.png
--- a/src-tauri/icons/icon.icns
+++ b/src-tauri/icons/icon.icns
--- a/src-tauri/icons/icon.ico
+++ b/src-tauri/icons/icon.ico
--- a/src-tauri/icons/icon.png
+++ b/src-tauri/icons/icon.png
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -0,0 +1,26 @@
+pub mod vault;
+
+use vault::VaultEntry;
+
+#[tauri::command]
+fn list_vault(path: String) -> Result<Vec<VaultEntry>, String> {
+    vault::scan_vault(&path)
+}
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    tauri::Builder::default()
+        .setup(|app| {
+            if cfg!(debug_assertions) {
+                app.handle().plugin(
+                    tauri_plugin_log::Builder::default()
+                        .level(log::LevelFilter::Info)
+                        .build(),
+                )?;
+            }
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![list_vault])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -0,0 +1,6 @@
+// Prevents additional console window on Windows in release, DO NOT REMOVE!!
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+fn main() {
+  laputa_lib::run();
+}
--- a/src-tauri/src/vault.rs
+++ b/src-tauri/src/vault.rs
@@ -0,0 +1,343 @@
+use gray_matter::engine::YAML;
+use gray_matter::Matter;
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::fs;
+use std::path::Path;
+use std::time::UNIX_EPOCH;
+use walkdir::WalkDir;
+
+#[derive(Debug, Serialize, Deserialize, Clone, Default)]
+pub struct VaultEntry {
+    pub path: String,
+    pub filename: String,
+    pub title: String,
+    #[serde(rename = "isA")]
+    pub is_a: Option<String>,
+    pub aliases: Vec<String>,
+    #[serde(rename = "belongsTo")]
+    pub belongs_to: Vec<String>,
+    #[serde(rename = "relatedTo")]
+    pub related_to: Vec<String>,
+    pub status: Option<String>,
+    pub owner: Option<String>,
+    pub cadence: Option<String>,
+    #[serde(rename = "modifiedAt")]
+    pub modified_at: Option<u64>,
+    #[serde(rename = "fileSize")]
+    pub file_size: u64,
+}
+
+/// Intermediate struct to capture YAML frontmatter fields.
+#[derive(Debug, Deserialize, Default)]
+struct Frontmatter {
+    #[serde(rename = "Is A")]
+    is_a: Option<String>,
+    #[serde(default)]
+    aliases: Option<StringOrList>,
+    #[serde(rename = "Belongs to")]
+    belongs_to: Option<StringOrList>,
+    #[serde(rename = "Related to")]
+    related_to: Option<StringOrList>,
+    #[serde(rename = "Status")]
+    status: Option<String>,
+    #[serde(rename = "Owner")]
+    owner: Option<String>,
+    #[serde(rename = "Cadence")]
+    cadence: Option<String>,
+}
+
+/// Handles YAML fields that can be either a single string or a list of strings.
+#[derive(Debug, Deserialize, Clone)]
+#[serde(untagged)]
+enum StringOrList {
+    Single(String),
+    List(Vec<String>),
+}
+
+impl StringOrList {
+    fn into_vec(self) -> Vec<String> {
+        match self {
+            StringOrList::Single(s) => vec![s],
+            StringOrList::List(v) => v,
+        }
+    }
+}
+
+/// Extract the title from a markdown file's content.
+/// Tries the first H1 heading (`# Title`), falls back to filename without extension.
+fn extract_title(content: &str, filename: &str) -> String {
+    for line in content.lines() {
+        let trimmed = line.trim();
+        if let Some(heading) = trimmed.strip_prefix("# ") {
+            let title = heading.trim();
+            if !title.is_empty() {
+                return title.to_string();
+            }
+        }
+    }
+    // Fallback: filename without .md extension
+    filename.strip_suffix(".md").unwrap_or(filename).to_string()
+}
+
+/// Parse frontmatter from raw YAML data extracted by gray_matter.
+fn parse_frontmatter(data: &HashMap<String, serde_json::Value>) -> Frontmatter {
+    // Convert HashMap to serde_json::Value for deserialization
+    let value = serde_json::Value::Object(
+        data.iter()
+            .map(|(k, v)| (k.clone(), v.clone()))
+            .collect(),
+    );
+    serde_json::from_value(value).unwrap_or_default()
+}
+
+/// Parse a single markdown file into a VaultEntry.
+pub fn parse_md_file(path: &Path) -> Result<VaultEntry, String> {
+    let content = fs::read_to_string(path).map_err(|e| format!("Failed to read {}: {}", path.display(), e))?;
+
+    let filename = path
+        .file_name()
+        .map(|f| f.to_string_lossy().to_string())
+        .unwrap_or_default();
+
+    let matter = Matter::<YAML>::new();
+    let parsed = matter.parse(&content);
+
+    let frontmatter: Frontmatter = if let Some(data) = parsed.data {
+        match data {
+            gray_matter::Pod::Hash(map) => {
+                // Convert Pod HashMap to serde_json HashMap
+                let json_map: HashMap<String, serde_json::Value> = map
+                    .into_iter()
+                    .map(|(k, v)| (k, pod_to_json(v)))
+                    .collect();
+                parse_frontmatter(&json_map)
+            }
+            _ => Frontmatter::default(),
+        }
+    } else {
+        Frontmatter::default()
+    };
+
+    let title = extract_title(&parsed.content, &filename);
+
+    let metadata = fs::metadata(path).map_err(|e| format!("Failed to stat {}: {}", path.display(), e))?;
+    let modified_at = metadata
+        .modified()
+        .ok()
+        .and_then(|t| t.duration_since(UNIX_EPOCH).ok())
+        .map(|d| d.as_secs());
+    let file_size = metadata.len();
+
+    Ok(VaultEntry {
+        path: path.to_string_lossy().to_string(),
+        filename,
+        title,
+        is_a: frontmatter.is_a,
+        aliases: frontmatter.aliases.map(|a| a.into_vec()).unwrap_or_default(),
+        belongs_to: frontmatter.belongs_to.map(|b| b.into_vec()).unwrap_or_default(),
+        related_to: frontmatter.related_to.map(|r| r.into_vec()).unwrap_or_default(),
+        status: frontmatter.status,
+        owner: frontmatter.owner,
+        cadence: frontmatter.cadence,
+        modified_at,
+        file_size,
+    })
+}
+
+/// Convert gray_matter::Pod to serde_json::Value
+fn pod_to_json(pod: gray_matter::Pod) -> serde_json::Value {
+    match pod {
+        gray_matter::Pod::String(s) => serde_json::Value::String(s),
+        gray_matter::Pod::Integer(i) => serde_json::json!(i),
+        gray_matter::Pod::Float(f) => serde_json::json!(f),
+        gray_matter::Pod::Boolean(b) => serde_json::Value::Bool(b),
+        gray_matter::Pod::Array(arr) => {
+            serde_json::Value::Array(arr.into_iter().map(pod_to_json).collect())
+        }
+        gray_matter::Pod::Hash(map) => {
+            let obj: serde_json::Map<String, serde_json::Value> = map
+                .into_iter()
+                .map(|(k, v)| (k, pod_to_json(v)))
+                .collect();
+            serde_json::Value::Object(obj)
+        }
+        gray_matter::Pod::Null => serde_json::Value::Null,
+    }
+}
+
+/// Scan a directory recursively for .md files and return VaultEntry for each.
+pub fn scan_vault(vault_path: &str) -> Result<Vec<VaultEntry>, String> {
+    let path = Path::new(vault_path);
+    if !path.exists() {
+        return Err(format!("Vault path does not exist: {}", vault_path));
+    }
+    if !path.is_dir() {
+        return Err(format!("Vault path is not a directory: {}", vault_path));
+    }
+
+    let mut entries = Vec::new();
+    for entry in WalkDir::new(path)
+        .follow_links(true)
+        .into_iter()
+        .filter_map(|e| e.ok())
+    {
+        let entry_path = entry.path();
+        if entry_path.is_file()
+            && entry_path
+                .extension()
+                .map(|ext| ext == "md")
+                .unwrap_or(false)
+        {
+            match parse_md_file(entry_path) {
+                Ok(vault_entry) => entries.push(vault_entry),
+                Err(e) => {
+                    log::warn!("Skipping file: {}", e);
+                }
+            }
+        }
+    }
+
+    // Sort by modified date descending (newest first)
+    entries.sort_by(|a, b| b.modified_at.cmp(&a.modified_at));
+
+    Ok(entries)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::fs;
+    use std::io::Write;
+    use tempfile::TempDir;
+
+    fn create_test_file(dir: &Path, name: &str, content: &str) {
+        let file_path = dir.join(name);
+        if let Some(parent) = file_path.parent() {
+            fs::create_dir_all(parent).unwrap();
+        }
+        let mut file = fs::File::create(file_path).unwrap();
+        file.write_all(content.as_bytes()).unwrap();
+    }
+
+    #[test]
+    fn test_extract_title_from_h1() {
+        let content = "---\nIs A: Note\n---\n# My Great Note\n\nSome content here.";
+        assert_eq!(extract_title(content, "my-great-note.md"), "My Great Note");
+    }
+
+    #[test]
+    fn test_extract_title_fallback_to_filename() {
+        let content = "Just some content without a heading.";
+        assert_eq!(extract_title(content, "fallback-title.md"), "fallback-title");
+    }
+
+    #[test]
+    fn test_extract_title_empty_h1_falls_back() {
+        let content = "# \n\nSome content.";
+        assert_eq!(extract_title(content, "empty-h1.md"), "empty-h1");
+    }
+
+    #[test]
+    fn test_parse_full_frontmatter() {
+        let dir = TempDir::new().unwrap();
+        let content = r#"---
+Is A: Project
+aliases:
+  - Laputa
+  - Castle in the Sky
+Belongs to:
+  - Studio Ghibli
+Related to:
+  - Miyazaki
+Status: Active
+Owner: Luca
+Cadence: Weekly
+---
+# Laputa Project
+
+This is a project note.
+"#;
+        create_test_file(dir.path(), "laputa.md", content);
+
+        let entry = parse_md_file(&dir.path().join("laputa.md")).unwrap();
+        assert_eq!(entry.title, "Laputa Project");
+        assert_eq!(entry.is_a, Some("Project".to_string()));
+        assert_eq!(entry.aliases, vec!["Laputa", "Castle in the Sky"]);
+        assert_eq!(entry.belongs_to, vec!["Studio Ghibli"]);
+        assert_eq!(entry.related_to, vec!["Miyazaki"]);
+        assert_eq!(entry.status, Some("Active".to_string()));
+        assert_eq!(entry.owner, Some("Luca".to_string()));
+        assert_eq!(entry.cadence, Some("Weekly".to_string()));
+        assert_eq!(entry.filename, "laputa.md");
+    }
+
+    #[test]
+    fn test_parse_empty_frontmatter() {
+        let dir = TempDir::new().unwrap();
+        let content = "---\n---\n# Just a Title\n\nNo frontmatter fields.";
+        create_test_file(dir.path(), "empty-fm.md", content);
+
+        let entry = parse_md_file(&dir.path().join("empty-fm.md")).unwrap();
+        assert_eq!(entry.title, "Just a Title");
+        assert_eq!(entry.is_a, None);
+        assert!(entry.aliases.is_empty());
+        assert!(entry.belongs_to.is_empty());
+        assert!(entry.related_to.is_empty());
+        assert_eq!(entry.status, None);
+    }
+
+    #[test]
+    fn test_parse_no_frontmatter() {
+        let dir = TempDir::new().unwrap();
+        let content = "# A Note Without Frontmatter\n\nJust markdown.";
+        create_test_file(dir.path(), "no-fm.md", content);
+
+        let entry = parse_md_file(&dir.path().join("no-fm.md")).unwrap();
+        assert_eq!(entry.title, "A Note Without Frontmatter");
+        assert_eq!(entry.is_a, None);
+    }
+
+    #[test]
+    fn test_parse_single_string_aliases() {
+        let dir = TempDir::new().unwrap();
+        let content = "---\naliases: SingleAlias\n---\n# Test\n";
+        create_test_file(dir.path(), "single-alias.md", content);
+
+        let entry = parse_md_file(&dir.path().join("single-alias.md")).unwrap();
+        assert_eq!(entry.aliases, vec!["SingleAlias"]);
+    }
+
+    #[test]
+    fn test_scan_vault_recursive() {
+        let dir = TempDir::new().unwrap();
+        create_test_file(dir.path(), "root.md", "# Root Note\n");
+        create_test_file(dir.path(), "sub/nested.md", "---\nIs A: Task\n---\n# Nested\n");
+        create_test_file(dir.path(), "not-markdown.txt", "This should be ignored");
+
+        let entries = scan_vault(dir.path().to_str().unwrap()).unwrap();
+        assert_eq!(entries.len(), 2);
+
+        let filenames: Vec<&str> = entries.iter().map(|e| e.filename.as_str()).collect();
+        assert!(filenames.contains(&"root.md"));
+        assert!(filenames.contains(&"nested.md"));
+    }
+
+    #[test]
+    fn test_scan_vault_nonexistent_path() {
+        let result = scan_vault("/nonexistent/path/that/does/not/exist");
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn test_parse_malformed_yaml() {
+        let dir = TempDir::new().unwrap();
+        // Malformed YAML — gray_matter should handle this gracefully
+        let content = "---\nIs A: [unclosed bracket\n---\n# Malformed\n";
+        create_test_file(dir.path(), "malformed.md", content);
+
+        let entry = parse_md_file(&dir.path().join("malformed.md"));
+        // Should still succeed — gray_matter may parse partially or skip
+        assert!(entry.is_ok());
+    }
+}
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -0,0 +1,37 @@
+{
+  "$schema": "../node_modules/@tauri-apps/cli/config.schema.json",
+  "productName": "laputa",
+  "version": "0.1.0",
+  "identifier": "com.tauri.dev",
+  "build": {
+    "frontendDist": "../dist",
+    "devUrl": "http://localhost:5173",
+    "beforeDevCommand": "pnpm dev",
+    "beforeBuildCommand": "pnpm build"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "Laputa",
+        "width": 1400,
+        "height": 900,
+        "resizable": true,
+        "fullscreen": false
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ]
+  }
+}
--- a/src/App.css
+++ b/src/App.css
@@ -0,0 +1,42 @@
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -0,0 +1,35 @@
+import { useState } from 'react'
+import reactLogo from './assets/react.svg'
+import viteLogo from '/vite.svg'
+import './App.css'
+
+function App() {
+  const [count, setCount] = useState(0)
+
+  return (
+    <>
+      <div>
+        <a href="https://vite.dev" target="_blank">
+          <img src={viteLogo} className="logo" alt="Vite logo" />
+        </a>
+        <a href="https://react.dev" target="_blank">
+          <img src={reactLogo} className="logo react" alt="React logo" />
+        </a>
+      </div>
+      <h1>Vite + React</h1>
+      <div className="card">
+        <button onClick={() => setCount((count) => count + 1)}>
+          count is {count}
+        </button>
+        <p>
+          Edit <code>src/App.tsx</code> and save to test HMR
+        </p>
+      </div>
+      <p className="read-the-docs">
+        Click on the Vite and React logos to learn more
+      </p>
+    </>
+  )
+}
+
+export default App
--- a/src/assets/react.svg
+++ b/src/assets/react.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="35.93" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 228"><path fill="#00D8FF" d="M210.483 73.824a171.49 171.49 0 0 0-8.24-2.597c.465-1.9.893-3.777 1.273-5.621c6.238-30.281 2.16-54.676-11.769-62.708c-13.355-7.7-35.196.329-57.254 19.526a171.23 171.23 0 0 0-6.375 5.848a155.866 155.866 0 0 0-4.241-3.917C100.759 3.829 77.587-4.822 63.673 3.233C50.33 10.957 46.379 33.89 51.995 62.588a170.974 170.974 0 0 0 1.892 8.48c-3.28.932-6.445 1.924-9.474 2.98C17.309 83.498 0 98.307 0 113.668c0 15.865 18.582 31.778 46.812 41.427a145.52 145.52 0 0 0 6.921 2.165a167.467 167.467 0 0 0-2.01 9.138c-5.354 28.2-1.173 50.591 12.134 58.266c13.744 7.926 36.812-.22 59.273-19.855a145.567 145.567 0 0 0 5.342-4.923a168.064 168.064 0 0 0 6.92 6.314c21.758 18.722 43.246 26.282 56.54 18.586c13.731-7.949 18.194-32.003 12.4-61.268a145.016 145.016 0 0 0-1.535-6.842c1.62-.48 3.21-.974 4.76-1.488c29.348-9.723 48.443-25.443 48.443-41.52c0-15.417-17.868-30.326-45.517-39.844Zm-6.365 70.984c-1.4.463-2.836.91-4.3 1.345c-3.24-10.257-7.612-21.163-12.963-32.432c5.106-11 9.31-21.767 12.459-31.957c2.619.758 5.16 1.557 7.61 2.4c23.69 8.156 38.14 20.213 38.14 29.504c0 9.896-15.606 22.743-40.946 31.14Zm-10.514 20.834c2.562 12.94 2.927 24.64 1.23 33.787c-1.524 8.219-4.59 13.698-8.382 15.893c-8.067 4.67-25.32-1.4-43.927-17.412a156.726 156.726 0 0 1-6.437-5.87c7.214-7.889 14.423-17.06 21.459-27.246c12.376-1.098 24.068-2.894 34.671-5.345a134.17 134.17 0 0 1 1.386 6.193ZM87.276 214.515c-7.882 2.783-14.16 2.863-17.955.675c-8.075-4.657-11.432-22.636-6.853-46.752a156.923 156.923 0 0 1 1.869-8.499c10.486 2.32 22.093 3.988 34.498 4.994c7.084 9.967 14.501 19.128 21.976 27.15a134.668 134.668 0 0 1-4.877 4.492c-9.933 8.682-19.886 14.842-28.658 17.94ZM50.35 144.747c-12.483-4.267-22.792-9.812-29.858-15.863c-6.35-5.437-9.555-10.836-9.555-15.216c0-9.322 13.897-21.212 37.076-29.293c2.813-.98 5.757-1.905 8.812-2.773c3.204 10.42 7.406 21.315 12.477 32.332c-5.137 11.18-9.399 22.249-12.634 32.792a134.718 134.718 0 0 1-6.318-1.979Zm12.378-84.26c-4.811-24.587-1.616-43.134 6.425-47.789c8.564-4.958 27.502 2.111 47.463 19.835a144.318 144.318 0 0 1 3.841 3.545c-7.438 7.987-14.787 17.08-21.808 26.988c-12.04 1.116-23.565 2.908-34.161 5.309a160.342 160.342 0 0 1-1.76-7.887Zm110.427 27.268a347.8 347.8 0 0 0-7.785-12.803c8.168 1.033 15.994 2.404 23.343 4.08c-2.206 7.072-4.956 14.465-8.193 22.045a381.151 381.151 0 0 0-7.365-13.322Zm-45.032-43.861c5.044 5.465 10.096 11.566 15.065 18.186a322.04 322.04 0 0 0-30.257-.006c4.974-6.559 10.069-12.652 15.192-18.18ZM82.802 87.83a323.167 323.167 0 0 0-7.227 13.238c-3.184-7.553-5.909-14.98-8.134-22.152c7.304-1.634 15.093-2.97 23.209-3.984a321.524 321.524 0 0 0-7.848 12.897Zm8.081 65.352c-8.385-.936-16.291-2.203-23.593-3.793c2.26-7.3 5.045-14.885 8.298-22.6a321.187 321.187 0 0 0 7.257 13.246c2.594 4.48 5.28 8.868 8.038 13.147Zm37.542 31.03c-5.184-5.592-10.354-11.779-15.403-18.433c4.902.192 9.899.29 14.978.29c5.218 0 10.376-.117 15.453-.343c-4.985 6.774-10.018 12.97-15.028 18.486Zm52.198-57.817c3.422 7.8 6.306 15.345 8.596 22.52c-7.422 1.694-15.436 3.058-23.88 4.071a382.417 382.417 0 0 0 7.859-13.026a347.403 347.403 0 0 0 7.425-13.565Zm-16.898 8.101a358.557 358.557 0 0 1-12.281 19.815a329.4 329.4 0 0 1-23.444.823c-7.967 0-15.716-.248-23.178-.732a310.202 310.202 0 0 1-12.513-19.846h.001a307.41 307.41 0 0 1-10.923-20.627a310.278 310.278 0 0 1 10.89-20.637l-.001.001a307.318 307.318 0 0 1 12.413-19.761c7.613-.576 15.42-.876 23.31-.876H128c7.926 0 15.743.303 23.354.883a329.357 329.357 0 0 1 12.335 19.695a358.489 358.489 0 0 1 11.036 20.54a329.472 329.472 0 0 1-11 20.722Zm22.56-122.124c8.572 4.944 11.906 24.881 6.52 51.026c-.344 1.668-.73 3.367-1.15 5.09c-10.622-2.452-22.155-4.275-34.23-5.408c-7.034-10.017-14.323-19.124-21.64-27.008a160.789 160.789 0 0 1 5.888-5.4c18.9-16.447 36.564-22.941 44.612-18.3ZM128 90.808c12.625 0 22.86 10.235 22.86 22.86s-10.235 22.86-22.86 22.86s-22.86-10.235-22.86-22.86s10.235-22.86 22.86-22.86Z"></path></svg>
--- a/src/index.css
+++ b/src/index.css
@@ -0,0 +1,68 @@
+:root {
+  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.tsx'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)
--- a/src/test/setup.ts
+++ b/src/test/setup.ts
@@ -0,0 +1 @@
+import '@testing-library/jest-dom/vitest'
--- a/tsconfig.app.json
+++ b/tsconfig.app.json
@@ -0,0 +1,28 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+    "target": "ES2022",
+    "useDefineForClassFields": true,
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "types": ["vite/client"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "jsx": "react-jsx",
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["src"]
+}
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.app.json" },
+    { "path": "./tsconfig.node.json" }
+  ]
+}
--- a/tsconfig.node.json
+++ b/tsconfig.node.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2023",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "types": ["node"],
+    "skipLibCheck": true,
+
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedSideEffectImports": true
+  },
+  "include": ["vite.config.ts"]
+}
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -0,0 +1,35 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+
+  // Prevent vite from obscuring Rust errors
+  clearScreen: false,
+
+  // Tauri expects a fixed port
+  server: {
+    port: 5173,
+    strictPort: true,
+  },
+
+  // Env variables starting with TAURI_ are exposed to the frontend
+  envPrefix: ['VITE_', 'TAURI_'],
+
+  build: {
+    // Tauri uses Chromium on Windows and WebKit on macOS/Linux
+    target: process.env.TAURI_PLATFORM === 'windows' ? 'chrome105' : 'safari13',
+    // Don't minify for debug builds
+    minify: !process.env.TAURI_DEBUG ? 'esbuild' : false,
+    // Produce sourcemaps for debug builds
+    sourcemap: !!process.env.TAURI_DEBUG,
+  },
+
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: ['./src/test/setup.ts'],
+    include: ['src/**/*.{test,spec}.{ts,tsx}'],
+  },
+})
				`@@ -0,0 +1 @@`
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