feat(9.75f-1): Implement FileBox dynamic plugin foundation

- Add workspace configuration to support plugins
- Create nyash-file plugin with C ABI
- Implement nyash_file_open/read/write/exists/free functions
- Add libloading dependency with dynamic-file feature
- Successfully build libnyash_file.so (1.55s build time)

Next: Implement plugin loader in interpreter

Cargo.toml

@@ -16,6 +16,8 @@ cli = []
 gui = ["dep:egui", "dep:eframe", "dep:egui_extras", "dep:image"]
 gui-examples = ["gui"]
 all-examples = ["gui-examples"]
+# 動的ライブラリサポート
+dynamic-file = ["dep:libloading"]
 
 [lib]
 name = "nyash_rust"
@@ -113,6 +115,9 @@ js-sys = "0.3"
 wabt = "0.10"
 wasmtime = "35.0.0"
 
+# 動的ライブラリロード（Phase 9.75f）
+libloading = { version = "0.8", optional = true }
+
 # GUI フレームワーク - only when gui feature is enabled
 egui = { version = "0.29", optional = true }
 eframe = { version = "0.29", default-features = false, features = ["default_fonts", "glow"], optional = true }
@@ -169,3 +174,11 @@ panic = "abort"
 # 開発用設定
 opt-level = 0
 debug = true
+
+# Workspace configuration
+[workspace]
+members = [
+    ".",                    # メインのnyash-rustプロジェクト
+    "plugins/nyash-file",   # FileBoxプラグイン
+]
+resolver = "2"

Cargo.toml.backup

@@ -0,0 +1,171 @@
+[package]
+name = "nyash-rust"
+version = "0.1.0"
+edition = "2021"
+authors = ["Claude Code <claude@anthropic.com>"]
+description = "Everything is Box in Rust - Ultimate Memory Safe Nyash Implementation"
+license = "MIT"
+repository = "https://github.com/user/nyash"
+keywords = ["language", "interpreter", "box", "memory-safe", "rust"]
+categories = ["development-tools::parsing", "interpreters"]
+
+# Default features - minimal CLI only
+[features]
+default = ["cli"]
+cli = []
+gui = ["dep:egui", "dep:eframe", "dep:egui_extras", "dep:image"]
+gui-examples = ["gui"]
+all-examples = ["gui-examples"]
+
+[lib]
+name = "nyash_rust"
+path = "src/lib.rs"
+crate-type = ["cdylib", "rlib"]
+
+# Main CLI binary - always available
+[[bin]]
+name = "nyash"
+path = "src/main.rs"
+
+# Examples for development - only available as examples, not bins
+[[example]]
+name = "gui_simple_notepad"
+path = "examples/simple_notepad.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_simple_notepad_v2"
+path = "examples/simple_notepad_v2.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_simple_notepad_ascii"
+path = "examples/simple_notepad_ascii.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_debug_notepad"
+path = "examples/debug_notepad.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_nyash_notepad_jp"
+path = "examples/nyash_notepad_jp.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_nyash_explorer"
+path = "examples/nyash_explorer.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_nyash_explorer_with_icons"
+path = "examples/nyash_explorer_with_icons.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_test_icon_extraction"
+path = "examples/test_icon_extraction.rs"
+required-features = ["gui-examples"]
+
+[[example]]
+name = "gui_visual_node_prototype"
+path = "development/egui_research/experiments/visual_node_prototype.rs"
+required-features = ["gui-examples"]
+
+
+
+[dependencies]
+# エラーハンドリング
+thiserror = "2.0"
+anyhow = "1.0"
+
+# シリアライゼーション（将来のAST永続化用）
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+
+# コマンドライン（将来の CLI用）
+clap = { version = "4.0", features = ["derive"] }
+
+# 並行処理（GlobalBox用）
+lazy_static = "1.5"
+once_cell = "1.20"
+
+# デバッグ・ログ
+log = "0.4"
+env_logger = "0.11"
+
+# 日時処理
+chrono = "0.4"
+
+# HTTP通信（HttpClientBox用）
+# reqwest = { version = "0.11", features = ["blocking"] }  # Temporarily disabled
+
+# 正規表現（RegexBox用）
+regex = "1.0"
+
+# WebAssembly対応
+wasm-bindgen = "0.2"
+console_error_panic_hook = "0.1"
+js-sys = "0.3"
+
+# WASM backend dependencies (Phase 8)
+wabt = "0.10"
+wasmtime = "35.0.0"
+
+# GUI フレームワーク - only when gui feature is enabled
+egui = { version = "0.29", optional = true }
+eframe = { version = "0.29", default-features = false, features = ["default_fonts", "glow"], optional = true }
+egui_extras = { version = "0.29", features = ["image"], optional = true }
+image = { version = "0.25", features = ["png", "ico"], optional = true }
+
+# Windows API
+[target.'cfg(windows)'.dependencies]
+windows = { version = "0.60", features = [
+    "Win32_Foundation",
+    "Win32_Storage_FileSystem", 
+    "Win32_UI_Shell",
+    "Win32_UI_WindowsAndMessaging",
+    "Win32_System_Com",
+    "Win32_Graphics_Gdi",
+] }
+
+[dependencies.web-sys]
+version = "0.3"
+features = [
+  "console",
+  "Document", 
+  "Element",
+  "HtmlElement",
+  "Window",
+  "DomTokenList",
+  "CssStyleDeclaration",
+  "HtmlCanvasElement",
+  "CanvasRenderingContext2d",
+  "ImageData",
+  "TextMetrics",
+  "CanvasGradient",
+  "CanvasPattern",
+  "Path2d",
+]
+
+[dev-dependencies]
+# テスト・ベンチマークツール
+criterion = "0.5"
+
+# Benchmark configuration (will be added later)
+# [[bench]]
+# name = "box_performance"
+# harness = false
+
+[profile.release]
+# 最適化設定
+opt-level = 3
+lto = true
+codegen-units = 1
+panic = "abort"
+
+[profile.dev]
+# 開発用設定
+opt-level = 0
+debug = true

plugins/nyash-file/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "nyash-file"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+name = "nyash_file"
+crate-type = ["cdylib"]  # 動的ライブラリとして生成
+
+[dependencies]
+# C FFI用
+libc = "0.2"
+
+# Nyashの基本的な型定義が必要になるかも（後で検討）
+# nyash-core = { path = "../.." }
+
+[features]
+default = []

plugins/nyash-file/src/lib.rs

@@ -0,0 +1,196 @@
+//! FileBox Dynamic Plugin
+//! 
+//! C ABIを使用した動的ライブラリとしてFileBox機能を提供
+
+use std::ffi::{c_char, c_void, CStr, CString};
+use std::fs::{File, OpenOptions};
+use std::io::{Read, Write, Seek};
+use std::os::raw::c_int;
+
+/// プラグインのマジックナンバー（'NYAS'）
+const PLUGIN_MAGIC: u32 = 0x4E594153;
+
+/// プラグイン情報構造体
+#[repr(C)]
+pub struct FileBoxPlugin {
+    magic: u32,
+    version: u32,
+    api_version: u32,
+}
+
+/// FileBoxのハンドル（不透明ポインタ）
+pub struct FileBoxHandle {
+    file: File,
+    path: String,
+}
+
+/// プラグイン初期化
+#[no_mangle]
+pub extern "C" fn nyash_plugin_init() -> *const FileBoxPlugin {
+    let plugin = Box::new(FileBoxPlugin {
+        magic: PLUGIN_MAGIC,
+        version: 1,
+        api_version: 1,
+    });
+    Box::into_raw(plugin)
+}
+
+/// FileBoxを開く
+/// 
+/// # Safety
+/// - pathは有効なUTF-8のC文字列である必要がある
+/// - 返されたポインタはnyash_file_freeで解放する必要がある
+#[no_mangle]
+pub unsafe extern "C" fn nyash_file_open(path: *const c_char) -> *mut c_void {
+    if path.is_null() {
+        return std::ptr::null_mut();
+    }
+    
+    let path_str = match CStr::from_ptr(path).to_str() {
+        Ok(s) => s,
+        Err(_) => return std::ptr::null_mut(),
+    };
+    
+    match OpenOptions::new()
+        .read(true)
+        .write(true)
+        .create(true)
+        .open(path_str)
+    {
+        Ok(file) => {
+            let handle = Box::new(FileBoxHandle {
+                file,
+                path: path_str.to_string(),
+            });
+            Box::into_raw(handle) as *mut c_void
+        }
+        Err(_) => std::ptr::null_mut(),
+    }
+}
+
+/// ファイルの内容を読み取る
+/// 
+/// # Safety
+/// - handleはnyash_file_openから返された有効なポインタである必要がある
+/// - 返された文字列はnyash_string_freeで解放する必要がある
+#[no_mangle]
+pub unsafe extern "C" fn nyash_file_read(handle: *mut c_void) -> *mut c_char {
+    if handle.is_null() {
+        return std::ptr::null_mut();
+    }
+    
+    let file_box = &mut *(handle as *mut FileBoxHandle);
+    let mut content = String::new();
+    
+    // ファイルポインタを最初に戻す
+    if let Err(_) = file_box.file.seek(std::io::SeekFrom::Start(0)) {
+        return std::ptr::null_mut();
+    }
+    
+    match file_box.file.read_to_string(&mut content) {
+        Ok(_) => {
+            match CString::new(content) {
+                Ok(c_str) => c_str.into_raw(),
+                Err(_) => std::ptr::null_mut(),
+            }
+        }
+        Err(_) => std::ptr::null_mut(),
+    }
+}
+
+/// ファイルに内容を書き込む
+/// 
+/// # Safety
+/// - handleはnyash_file_openから返された有効なポインタである必要がある
+/// - contentは有効なUTF-8のC文字列である必要がある
+#[no_mangle]
+pub unsafe extern "C" fn nyash_file_write(
+    handle: *mut c_void,
+    content: *const c_char
+) -> c_int {
+    if handle.is_null() || content.is_null() {
+        return 0;
+    }
+    
+    let file_box = &mut *(handle as *mut FileBoxHandle);
+    let content_str = match CStr::from_ptr(content).to_str() {
+        Ok(s) => s,
+        Err(_) => return 0,
+    };
+    
+    // ファイルをクリアして最初から書き込む
+    if let Err(_) = file_box.file.set_len(0) {
+        return 0;
+    }
+    if let Err(_) = file_box.file.seek(std::io::SeekFrom::Start(0)) {
+        return 0;
+    }
+    
+    match file_box.file.write_all(content_str.as_bytes()) {
+        Ok(_) => 1,  // 成功
+        Err(_) => 0,  // 失敗
+    }
+}
+
+/// ファイルが存在するかチェック
+/// 
+/// # Safety
+/// - pathは有効なUTF-8のC文字列である必要がある
+#[no_mangle]
+pub unsafe extern "C" fn nyash_file_exists(path: *const c_char) -> c_int {
+    if path.is_null() {
+        return 0;
+    }
+    
+    let path_str = match CStr::from_ptr(path).to_str() {
+        Ok(s) => s,
+        Err(_) => return 0,
+    };
+    
+    if std::path::Path::new(path_str).exists() {
+        1
+    } else {
+        0
+    }
+}
+
+/// FileBoxハンドルを解放
+/// 
+/// # Safety
+/// - handleはnyash_file_openから返された有効なポインタである必要がある
+/// - 解放後はhandleを使用してはいけない
+#[no_mangle]
+pub unsafe extern "C" fn nyash_file_free(handle: *mut c_void) {
+    if !handle.is_null() {
+        drop(Box::from_raw(handle as *mut FileBoxHandle));
+    }
+}
+
+/// 文字列を解放（nyash_file_readの戻り値用）
+/// 
+/// # Safety
+/// - strはnyash_file_readから返された有効なポインタである必要がある
+#[no_mangle]
+pub unsafe extern "C" fn nyash_string_free(str: *mut c_char) {
+    if !str.is_null() {
+        drop(CString::from_raw(str));
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::ffi::CString;
+    
+    #[test]
+    fn test_plugin_init() {
+        unsafe {
+            let plugin = nyash_plugin_init();
+            assert!(!plugin.is_null());
+            let plugin_info = &*plugin;
+            assert_eq!(plugin_info.magic, PLUGIN_MAGIC);
+            assert_eq!(plugin_info.version, 1);
+            assert_eq!(plugin_info.api_version, 1);
+        }
+    }
+}