Fixes

.env_dist

@@ -0,0 +1,8 @@
+# Script saving configuration
+ENABLE_SAVE=true
+SAVE_SECRET=save
+SAVE_DIRECTORY=./data/scripts
+MAX_FILENAME_LENGTH=32
+
+# Next.js environment
+NODE_ENV=production

.gitignore

@@ -4,3 +4,5 @@ node_modules
 target
 .DS_Store
 webui/src/wasm
+webui/data
+.env

Dockerfile

@@ -0,0 +1,30 @@
+FROM rust:1.91 AS rust-builder
+
+WORKDIR /app
+RUN cargo install wasm-pack
+
+COPY rust/ ./rust/
+WORKDIR /app/rust/rhai-codemirror
+RUN wasm-pack build --target web --out-dir "../../webui/src/wasm/rhai-codemirror"
+
+WORKDIR /app/rust/runner
+RUN wasm-pack build --target web --out-dir "../../webui/src/wasm/runner"
+
+FROM node:24-alpine AS app
+
+WORKDIR /app
+
+RUN npm install -g bun
+COPY webui/package.json webui/bun.lock* ./webui/
+
+WORKDIR /app/webui
+RUN bun install --frozen-lockfile
+COPY webui/ ./
+COPY --from=rust-builder /app/webui/src/wasm/ ./src/wasm/
+
+RUN bun run build
+
+RUN mkdir -p ../data/scripts
+EXPOSE 3000
+
+CMD ["bun", "start"]

agents/greed-v1.rhai

@@ -1,5 +1,3 @@
-
-
 // Return a random valid action on the given board.
 // Used as a last resort.
 fn random_action(board) {
@@ -59,8 +57,8 @@ fn compute_influence(board) {
 	}
 
 
-   // Sort by increasing absolute score
+	// Sort by increasing absolute score
-   influence.sort(|a, b| {
+	influence.sort(|a, b| {
 		let a_abs = a[1].abs();
 		let b_abs = b[1].abs();
 
@@ -85,7 +83,6 @@ fn place_number(board, minimize) {
 		return random_action(board);
 	}
 
-
 	// Get the most influential position
 	let pos = influence[-1][0];
 	let val = influence[-1][1];
@@ -104,7 +101,7 @@ fn place_number(board, minimize) {
 		if val > 0 {
 			symbol = available_numbers[-1];
 		} else {
-		  	symbol = available_numbers[0];
+			symbol = available_numbers[0];
 		}
 	}
 
@@ -139,25 +136,20 @@ fn place_op(board, minimize) {
 	return ();
 }
 
-
 // Main step function (shared between min and max)
 fn greed_step(board, minimize) {
-
 	let action = place_op(board, minimize);
+
+	// We could not place an op, so place a number
 	if action == () {
 		action = place_number(board, minimize);
 	}
 
-	if board.can_play(action) {
-		return action;
-	}
-
 	// Prevent invalid moves, random fallback
+	if board.can_play(action) { return action; }
 	return random_action(board);
 }
 
-
-
 // Minimizer step
 fn step_min(board) {
 	greed_step(board, true)

agents/greed-v2.rhai

@@ -0,0 +1,254 @@
+// SECRET
+
+// Return a random valid action on the given board.
+// Used as a last resort.
+fn random_action(board) {
+	let symb = rand_symb();
+	let pos = rand_int(0, 10);
+	let action = Action(symb, pos);
+
+	while !board.can_play(action) {
+		let symb = rand_symb();
+		let pos = rand_int(0, 10);
+		action = Action(symb, pos);
+	}
+
+	return action
+}
+
+
+/// Returns an array of (idx, f32) for each empty slot in the board.
+/// - idx is the index of this slot
+/// - f32 is the "influence of" this slot
+fn compute_influence(board) {
+	// Fill all empty slots with fives and compute starting value
+	let filled = board;
+	for i in filled.free_spots_idx() {
+		filled[i] = 5;
+	}
+
+	// Compute the value of the filled board
+	let base = filled.evaluate();
+
+	// Exit early if the board is invalid.
+	// This is usually caused by zero-division.
+	if (base == ()) {
+		return [];
+	}
+
+	// Increase each slot's value by 1
+	// and record the effect on the expression's total value.
+	//
+	// `influence` is an array of (slot_idx, value)
+	let influence = [];
+	for i in 0..board.size() {
+		let slot = board[i];
+
+		// Ignore slots that are not empty
+		if slot != "" {
+			continue
+		}
+
+		// Don't assign directly to `filled`,
+		// we want to keep it full of fives.
+		// Assigning to `b` make a copy of the board.
+		let b = filled;
+		b[i] = 6;
+
+		influence.push([i, b.evaluate() - base]);
+	}
+
+
+   // Sort by increasing absolute score
+   influence.sort(|a, b| {
+		let a_abs = a[1].abs();
+		let b_abs = b[1].abs();
+
+		// Returns...
+		//  1 if positive (a_abs > b_abs),
+		// -1 if negative,
+		//  0 if equal
+		return sign(a_abs - b_abs);
+	});
+
+	return influence;
+}
+
+fn place_number(board, minimize) {
+	let numbers = [0,1,2,3,4,5,6,7,8,9];
+	let available_numbers = numbers.retain(|x| board.contains(x));
+
+	let influence = compute_influence(board);
+
+	// Stupid edge cases, fall back to random
+	if influence.len() == 0 || available_numbers.len() == 0 {
+		return random_action(board);
+	}
+
+
+	// Get the most influential position
+	let pos = influence[-1][0];
+	let val = influence[-1][1];
+
+	// Pick the number we should use,
+	// This is always either the largest
+	// or the smallest number available to us.
+	let symbol = 0;
+	if minimize {
+		if val > 0 {
+			symbol = available_numbers[0];
+		} else {
+			symbol = available_numbers[-1];
+		}
+	} else {
+		if val > 0 {
+			symbol = available_numbers[-1];
+		} else {
+		  	symbol = available_numbers[0];
+		}
+	}
+
+	return Action(symbol, pos);
+}
+
+
+fn op_value(board) {
+    print(board);
+	let actions = [];
+    for o in ["+", "-", "*", "/"] {
+        if board.contains(o) {
+            continue;
+        }
+
+        for p in 0..=10 {
+            let action = Action(o, p);
+            if board.can_play(action) {
+                actions.push(action);
+            }
+        }
+    }
+
+    // No other operators can be placed, return value of fives
+    if actions.is_empty() {
+        let filled = board;
+        for i in filled.free_spots_idx() {
+            filled[i] = 5;
+        }
+        let v = filled.evaluate();
+        if v == () {
+            return ();
+        } else {
+            return [v, v];
+        }
+    }
+
+
+	let max = ();
+    let min = ();
+   	for a in actions {
+       let tmp = board;
+       tmp.play(a);
+
+       let vals = op_value(tmp);
+       if vals != () {
+           	for v in vals {
+                if max == () || min == () {
+                    max = v;
+                    min = v;
+                }
+
+                if v > max {
+                    max = v;
+                } else if v < min {
+                    min = v;
+                }
+            }
+       }
+   }
+
+   if min == () || max == () {
+       return ();
+   }
+
+   return [min, max];
+}
+
+fn place_op(board, minimize) {
+	let ops = ["+", "-", "*", "/"];
+	let available_ops = ops.retain(|x| board.contains(x));
+
+	// Performance optimization if board is empty.
+    // This is the move we would pick, hard-coded.
+    if available_ops.len() == 4 {
+        if minimize {
+        	let act = Action("+", 3);
+        	if board.can_play(act) {return act}
+    	} else {
+            let act = Action("/", 9);
+        	if board.can_play(act) {return act}
+        }
+    }
+
+	// All possible operator actions
+	let actions = [];
+    for o in ["+", "-", "*", "/"] {
+        for p in 0..=10 {
+            let action = Action(o, p);
+            if board.can_play(action) {
+                let tmp = board;
+                tmp.play(action);
+                let v = op_value(tmp);
+                if v != () {
+                	actions.push([action, v]);
+                }
+            }
+        }
+    }
+
+    if actions.is_empty() {
+        return ();
+    }
+
+   let action = ();
+   if minimize {
+        // Sort by increasing minimum score
+        actions.sort(|a, b| sign(a[1][0] - b[1][0]));
+        action = actions[0][0];
+   } else {
+        // Sort by increasing maximum score
+        actions.sort(|a, b| sign(a[1][1] - b[1][1]));
+        action = actions[-1][0];
+   }
+
+   debug(action);
+
+   return action;
+}
+
+
+// Main step function (shared between min and max)
+fn greed_step(board, minimize) {
+	let action = place_op(board, minimize);
+	if action == () {
+		action = place_number(board, minimize);
+	}
+
+	if board.can_play(action) {
+		return action;
+	}
+
+	// Prevent invalid moves, random fallback
+	return random_action(board);
+}
+
+
+
+// Minimizer step
+fn step_min(board) {
+	greed_step(board, true)
+}
+
+// Maximizer step
+fn step_max(board) {
+	greed_step(board, false)
+}

docker-compose.yml

@@ -0,0 +1,10 @@
+services:
+  webui:
+    image: minimax
+    ports:
+      - "4000:3000"
+    volumes:
+      - ./data:/app/data
+    env_file:
+      - .env
+    restart: unless-stopped

rust/minimax/src/agents/rhai.rs

@@ -80,7 +80,6 @@ pub struct RhaiAgent<R: Rng + 'static> {
 
 	engine: Engine,
 	script: AST,
-	scope: Scope<'static>,
 	print_callback: Arc<dyn Fn(&str) + 'static>,
 }
 
@@ -118,7 +117,6 @@ impl<R: Rng + 'static> RhaiAgent<R> {
 
 			// Do not use FULL, rand_* functions are not pure
 			engine.set_optimization_level(OptimizationLevel::Simple);
-
 			engine.disable_symbol("eval");
 			engine.set_max_expr_depths(100, 100);
 			engine.set_max_strings_interned(1024);
@@ -201,13 +199,11 @@ impl<R: Rng + 'static> RhaiAgent<R> {
 		};
 
 		let script = engine.compile(script)?;
-		let scope = Scope::new(); // Not used
 
 		Ok(Self {
 			rng,
 			engine,
 			script,
-			scope,
 			print_callback,
 		})
 	}
@@ -227,7 +223,7 @@ impl<R: Rng + 'static> Agent for RhaiAgent<R> {
 	fn step_min(&mut self, board: &Board) -> Result<PlayerAction, Self::ErrorType> {
 		let res = self.engine.call_fn_with_options::<PlayerAction>(
 			CallFnOptions::new().eval_ast(false),
-			&mut self.scope,
+			&mut Scope::new(),
 			&self.script,
 			"step_min",
 			(board.clone(),),
@@ -242,7 +238,7 @@ impl<R: Rng + 'static> Agent for RhaiAgent<R> {
 	fn step_max(&mut self, board: &Board) -> Result<PlayerAction, Self::ErrorType> {
 		let res = self.engine.call_fn_with_options::<PlayerAction>(
 			CallFnOptions::new().eval_ast(false),
-			&mut self.scope,
+			&mut Scope::new(),
 			&self.script,
 			"step_max",
 			(board.clone(),),

rust/runner/src/lib.rs

@@ -1,8 +1,8 @@
 use wasm_bindgen::prelude::*;
 
 mod ansi;
-mod gamestate;
+mod minmaxgame;
-mod gamestatehuman;
+mod minmaxgamehuman;
 mod terminput;
 
 #[global_allocator]

rust/runner/src/minmaxgamehuman.rs

@@ -9,7 +9,7 @@ use wasm_bindgen::prelude::*;
 use crate::{ansi, terminput::TermInput};
 
 #[wasm_bindgen]
-pub struct GameStateHuman {
+pub struct MinMaxGameHuman {
 	/// Red player
 	human: TermInput,
 
@@ -26,7 +26,7 @@ pub struct GameStateHuman {
 }
 
 #[wasm_bindgen]
-impl GameStateHuman {
+impl MinMaxGameHuman {
 	#[wasm_bindgen(constructor)]
 	pub fn new(
 		max_script: &str,
@@ -34,7 +34,7 @@ impl GameStateHuman {
 		max_debug_callback: js_sys::Function,
 
 		game_state_callback: js_sys::Function,
-	) -> Result<GameStateHuman, String> {
+	) -> Result<MinMaxGameHuman, String> {
 		Self::new_native(
 			max_script,
 			move |s| {

webui/src/app/api/get-script/route.ts

@@ -0,0 +1,55 @@
+import { NextRequest, NextResponse } from "next/server";
+import { readFile } from "fs/promises";
+import { join } from "path";
+import { existsSync } from "fs";
+import { CONFIG } from "@/lib/config";
+
+// Force dynamic rendering for this API route
+export const dynamic = "force-dynamic";
+
+export async function GET(request: NextRequest) {
+	try {
+		const { searchParams } = request.nextUrl;
+		const name = searchParams.get("name");
+
+		if (!name) {
+			return NextResponse.json(
+				{ error: "Script name is required" },
+				{ status: 400 }
+			);
+		}
+
+		// Validate filename (same validation as save)
+		if (!CONFIG.FILENAME_REGEX.test(name)) {
+			return NextResponse.json(
+				{ error: "Invalid script name" },
+				{ status: 400 }
+			);
+		}
+
+		const saveDir = CONFIG.SAVE_DIRECTORY;
+		const filename = `${name}.rhai`;
+		const filepath = join(saveDir, filename);
+
+		if (!existsSync(filepath)) {
+			return NextResponse.json(
+				{ error: `Script "${name}" not found` },
+				{ status: 404 }
+			);
+		}
+
+		let content = await readFile(filepath, "utf8");
+
+		return NextResponse.json({
+			name,
+			filename,
+			content,
+		});
+	} catch (error) {
+		console.error("Get script error:", error);
+		return NextResponse.json(
+			{ error: "Failed to read script" },
+			{ status: 500 }
+		);
+	}
+}

webui/src/app/api/list-scripts/route.ts

@@ -0,0 +1,40 @@
+import { NextRequest, NextResponse } from "next/server";
+import { readdir } from "fs/promises";
+import { existsSync } from "fs";
+import { CONFIG } from "@/lib/config";
+
+// Force dynamic rendering for this API route
+export const dynamic = "force-dynamic";
+
+const headers = {
+	"Cache-Control": "no-store, no-cache, must-revalidate, proxy-revalidate",
+	Pragma: "no-cache",
+	Expires: "0",
+};
+
+export async function GET(_request: NextRequest) {
+	try {
+		const saveDir = CONFIG.SAVE_DIRECTORY;
+
+		// If save directory doesn't exist, return empty array
+		if (!existsSync(saveDir)) {
+			return NextResponse.json({ scripts: [] }, { headers });
+		}
+
+		// Read directory and filter for .rhai files
+		const files = await readdir(saveDir);
+
+		const scripts = files
+			.filter((file) => file.endsWith(".rhai"))
+			.map((file) => file.replace(".rhai", ""))
+			.sort(); // Sort alphabetically
+
+		return NextResponse.json({ scripts }, { headers });
+	} catch (error) {
+		console.error("List scripts error:", error);
+		return NextResponse.json(
+			{ error: "Failed to list scripts" },
+			{ status: 500, headers }
+		);
+	}
+}

webui/src/app/api/save-script/route.ts

@@ -0,0 +1,92 @@
+import { NextRequest, NextResponse } from "next/server";
+import { writeFile, mkdir } from "fs/promises";
+import { join } from "path";
+import { existsSync } from "fs";
+import { CONFIG } from "@/lib/config";
+
+export async function POST(request: NextRequest) {
+	try {
+		// Check if saving is enabled
+		if (!CONFIG.ENABLE_SAVE) {
+			return NextResponse.json(
+				{ error: "Script saving is disabled" },
+				{ status: 403 }
+			);
+		}
+
+		const { name, content, secret } = await request.json();
+
+		if (secret !== CONFIG.SAVE_SECRET) {
+			return NextResponse.json(
+				{ error: "Invalid secret" },
+				{ status: 401 }
+			);
+		}
+
+		if (!name || !content) {
+			return NextResponse.json(
+				{ error: "Name and content are required" },
+				{ status: 400 }
+			);
+		}
+
+		if (name.length > CONFIG.MAX_FILENAME_LENGTH) {
+			return NextResponse.json(
+				{
+					error: `Filename must be ${CONFIG.MAX_FILENAME_LENGTH} characters or less`,
+				},
+				{ status: 400 }
+			);
+		}
+
+		if (content.length > CONFIG.MAX_FILE_SIZE) {
+			return NextResponse.json(
+				{
+					error: `File is too large`,
+				},
+				{ status: 400 }
+			);
+		}
+
+		if (!CONFIG.FILENAME_REGEX.test(name)) {
+			return NextResponse.json(
+				{
+					error: "Filename can only contain alphanumerics, underscores, spaces, and hyphens",
+				},
+				{ status: 400 }
+			);
+		}
+
+		// Ensure save directory exists
+		const saveDir = CONFIG.SAVE_DIRECTORY;
+		if (!existsSync(saveDir)) {
+			await mkdir(saveDir, { recursive: true });
+		}
+
+		// Check if file already exists
+		const filename = `${name}.rhai`;
+		const filepath = join(saveDir, filename);
+
+		if (existsSync(filepath)) {
+			return NextResponse.json(
+				{ error: `A script named "${name}" already exists` },
+				{ status: 409 }
+			);
+		}
+
+		// Save the file
+		await writeFile(filepath, content, "utf8");
+
+		return NextResponse.json({
+			success: true,
+			message: `Script saved as ${filename}`,
+			filename,
+		});
+	} catch (error) {
+		console.error("Save script error:", error);
+		return NextResponse.json(
+			{ error: "Failed to save script" },
+			{ status: 500 }
+		);
+	}
+}

webui/src/components/Editor.tsx

@@ -128,7 +128,8 @@ export const Editor = forwardRef<any, EditorProps>(function Editor(
 				editorRef.current = null;
 			}
 		};
-	}, []); // DO NOT FILL ARRAY
+		// eslint-disable-next-line react-hooks/exhaustive-deps
+	}, []); // DO NOT FILL ARRAY - intentionally empty to prevent re-initialization
 
 	// Update font size when it changes
 	useEffect(() => {

webui/src/components/Playground.tsx

@@ -42,37 +42,40 @@ fn step_max(board) {
 const AGENTS = {
 	// special-cased below
 	Self: undefined,
-
-	Random: `fn random_action(board) {
-	let symb = rand_symb();
-	let pos = rand_int(0, 10);
-	let action = Action(symb, pos);
-
-	while !board.can_play(action) {
-		let symb = rand_symb();
-		let pos = rand_int(0, 10);
-		action = Action(symb, pos);
-	}
-
-	return action;
-}
-
-fn step_min(board) {
-	return random_action(board);
-}
-
-fn step_max(board) {
-	return random_action(board);
-}`,
 };
 
 export default function Playground() {
 	const [isScriptRunning, setIsScriptRunning] = useState(false);
 	const [isEditorReady, setIsEditorReady] = useState(false);
-	const [fontSize, setFontSize] = useState(14);
+	const [fontSize, setFontSize] = useState(() => {
-	const [bulkRounds, setBulkRounds] = useState(1000);
+		if (typeof window !== "undefined") {
-	const [selectedAgent, setSelectedAgent] = useState("Random");
+			const saved = localStorage.getItem("playground-fontSize");
+			return saved ? parseInt(saved, 10) : 14;
+		}
+		return 14;
+	});
+	const [bulkRounds, setBulkRounds] = useState(() => {
+		if (typeof window !== "undefined") {
+			const saved = localStorage.getItem("playground-bulkRounds");
+			return saved ? parseInt(saved, 10) : 1000;
+		}
+		return 1000;
+	});
+	const [selectedAgent, setSelectedAgent] = useState(() => {
+		if (typeof window !== "undefined") {
+			const saved = localStorage.getItem("playground-selectedAgent");
+			return saved || "Self";
+		}
+		return "Self";
+	});
 	const [isHelpOpen, setIsHelpOpen] = useState(false);
+	const [scriptName, setScriptName] = useState("");
+	const [saveSecret, setSaveSecret] = useState("");
+	const [isSaving, setIsSaving] = useState(false);
+	const [availableAgents, setAvailableAgents] = useState<string[]>([]);
+	const [savedScripts, setSavedScripts] = useState<Record<string, string>>(
+		{}
+	);
 
 	const editorRef = useRef<any>(null);
 	const resultRef = useRef<HTMLTextAreaElement>(null);
@@ -81,6 +84,86 @@ export default function Playground() {
 	const runDisabled = isScriptRunning || !isEditorReady;
 	const stopDisabled = !isScriptRunning;
 
+	// Fetch saved scripts and update available agents
+	const loadSavedScripts = useCallback(async () => {
+		try {
+			const response = await fetch("/api/list-scripts");
+			const data = await response.json();
+
+			if (response.ok) {
+				const scripts = data.scripts || [];
+				const scriptContents: Record<string, string> = {};
+
+				// Fetch content for each saved script
+				await Promise.all(
+					scripts.map(async (scriptName: string) => {
+						try {
+							const scriptResponse = await fetch(
+								`/api/get-script?name=${encodeURIComponent(
+									scriptName
+								)}`
+							);
+							const scriptData = await scriptResponse.json();
+
+							if (scriptResponse.ok) {
+								scriptContents[scriptName] = scriptData.content;
+							}
+						} catch (error) {
+							console.error(
+								`Failed to load script ${scriptName}:`,
+								error
+							);
+						}
+					})
+				);
+
+				setSavedScripts(scriptContents);
+
+				// Combine hardcoded agents with saved scripts, ensuring Self and Random are first
+				const combinedAgents = [
+					"Self",
+					...Object.keys(AGENTS).filter((key) => key !== "Self"),
+					...scripts,
+				];
+
+				setAvailableAgents(combinedAgents);
+			}
+		} catch (error) {
+			console.error("Failed to load saved scripts:", error);
+			// Fallback to hardcoded agents only
+			setAvailableAgents(Object.keys(AGENTS));
+		}
+	}, []);
+
+	// Load saved scripts on component mount
+	useEffect(() => {
+		loadSavedScripts();
+	}, [loadSavedScripts]);
+
+	// Save font size to localStorage
+	useEffect(() => {
+		if (typeof window !== "undefined") {
+			localStorage.setItem("playground-fontSize", fontSize.toString());
+		}
+	}, [fontSize]);
+
+	// Save bulk rounds to localStorage
+	useEffect(() => {
+		if (typeof window !== "undefined") {
+			localStorage.setItem(
+				"playground-bulkRounds",
+				bulkRounds.toString()
+			);
+		}
+	}, [bulkRounds]);
+
+	// Save selected agent to localStorage
+	useEffect(() => {
+		if (typeof window !== "undefined") {
+			localStorage.setItem("playground-selectedAgent", selectedAgent);
+		}
+	}, [selectedAgent]);
+
 	const runHuman = useCallback(async () => {
 		if (resultRef.current) {
 			resultRef.current.value = "";
@@ -141,11 +224,15 @@ export default function Playground() {
 			terminalRef.current?.clear();
 			terminalRef.current?.focus();
 
-			const agentCode = AGENTS[selectedAgent as keyof typeof AGENTS];
+			// Get script content from either hardcoded agents or saved scripts
+			const hardcodedAgent = AGENTS[selectedAgent as keyof typeof AGENTS];
+			const savedScript = savedScripts[selectedAgent];
+
+			const agentScript = hardcodedAgent || savedScript;
 			const blueScript =
-				agentCode || (editorRef.current?.getValue() ?? "");
+				agentScript || (editorRef.current?.getValue() ?? "");
 			const redScript = editorRef.current?.getValue() ?? "";
-			const opponentName = agentCode ? selectedAgent : "script";
+			const opponentName = agentScript ? selectedAgent : "script";
 
 			await startScriptBulk(
 				redScript,
@@ -182,12 +269,92 @@ export default function Playground() {
 		}
 
 		setIsScriptRunning(false);
-	}, [runDisabled, bulkRounds, selectedAgent]);
+	}, [runDisabled, bulkRounds, selectedAgent, savedScripts]);
 
 	const stopScriptHandler = useCallback(() => {
 		stopScript();
 	}, []);
 
+	const saveScript = useCallback(async () => {
+		if (!scriptName.trim()) {
+			alert("Please enter a script name");
+			return;
+		}
+
+		if (!saveSecret.trim()) {
+			alert("Please enter a secret");
+			return;
+		}
+
+		if (!editorRef.current) {
+			alert("No script content to save");
+			return;
+		}
+
+		setIsSaving(true);
+
+		try {
+			const response = await fetch("/api/save-script", {
+				method: "POST",
+				headers: {
+					"Content-Type": "application/json",
+				},
+				body: JSON.stringify({
+					name: scriptName.trim(),
+					content: editorRef.current.getValue(),
+					secret: saveSecret.trim(),
+				}),
+			});
+
+			const result = await response.json();
+
+			if (response.ok) {
+				alert(result.message);
+				setScriptName("");
+				// Reload saved scripts to include the new one
+				loadSavedScripts();
+			} else {
+				alert(result.error || "Failed to save script");
+			}
+		} catch (error) {
+			console.error("Save error:", error);
+			alert("Network error: Failed to save script");
+		}
+
+		setIsSaving(false);
+	}, [scriptName, saveSecret, loadSavedScripts]);
+
+	const copyScriptToEditor = useCallback(() => {
+		if (!selectedAgent || selectedAgent === "Self") {
+			alert("Please select a script to copy to the editor");
+			return;
+		}
+
+		// Get the script content
+		const hardcodedAgent = AGENTS[selectedAgent as keyof typeof AGENTS];
+		const savedScript = savedScripts[selectedAgent];
+		const scriptContent = hardcodedAgent || savedScript;
+
+		if (!scriptContent) {
+			alert("No script content available for the selected agent");
+			return;
+		}
+
+		if (scriptContent.trim().startsWith("// SECRET")) {
+			alert("This script is hidden :)");
+			return;
+		}
+
+		// Warn user about losing current content
+		const confirmed = confirm(
+			`This will replace your current script with "${selectedAgent}". Your current work will be lost. Continue?`
+		);
+
+		if (confirmed && editorRef.current) {
+			editorRef.current.setValue(scriptContent);
+		}
+	}, [selectedAgent, savedScripts]);
+
 	return (
 		<div className={styles.playgroundRoot}>
 			<header className={styles.header}>
@@ -250,12 +417,69 @@ export default function Playground() {
 									<div className={styles.configField}>
 										<label>Bulk opponent</label>
 										<AgentSelector
-											agents={Object.keys(AGENTS)}
+											agents={availableAgents}
 											selectedAgent={selectedAgent}
 											onSelect={setSelectedAgent}
 											placeholder="Select an agent..."
 										/>
 									</div>
+
+									<div className={styles.configField}>
+										<Button
+											variant="info"
+											onClick={copyScriptToEditor}
+											disabled={
+												!selectedAgent ||
+												selectedAgent === "Self"
+											}
+										>
+											Copy to Editor
+										</Button>
+									</div>
+
+									<div className={styles.saveSection}>
+										<div className={styles.configField}>
+											<label>Script name</label>
+											<input
+												type="text"
+												className={styles.saveInput}
+												placeholder="Enter script name..."
+												value={scriptName}
+												onChange={(e) =>
+													setScriptName(
+														e.target.value
+													)
+												}
+												maxLength={32}
+											/>
+										</div>
+
+										<div className={styles.configField}>
+											<label>Secret</label>
+											<input
+												type="password"
+												className={styles.saveInput}
+												placeholder="Enter secret..."
+												value={saveSecret}
+												onChange={(e) =>
+													setSaveSecret(
+														e.target.value
+													)
+												}
+											/>
+										</div>
+
+										<div className={styles.configField}>
+											<Button
+												variant="primary"
+												onClick={saveScript}
+												loading={isSaving}
+												disabled={isSaving}
+											>
+												Save Script
+											</Button>
+										</div>
+									</div>
 								</div>
 							}
 						/>

webui/src/lib/config.ts

@@ -0,0 +1,9 @@
+export const CONFIG = {
+	ENABLE_SAVE: process.env.ENABLE_SAVE === "true" || true,
+	SAVE_SECRET: process.env.SAVE_SECRET || "save",
+
+	SAVE_DIRECTORY: process.env.SAVE_DIRECTORY || "./data/scripts",
+	MAX_FILENAME_LENGTH: parseInt(process.env.MAX_FILENAME_LENGTH || "32"),
+	MAX_FILE_SIZE: parseInt(process.env.MAX_FILE_SIZE || "1048576"),
+	FILENAME_REGEX: /^[a-zA-Z0-9_\s-]+$/,
+} as const;

webui/src/lib/worker_human.ts

@@ -1,8 +1,8 @@
-import init, { GameState, GameStateHuman } from "../wasm/runner";
+import init, { MinMaxGameHuman } from "../wasm/runner";
 
 let wasmReady = false;
 let wasmInitPromise: Promise<void> | null = null;
-let currentGame: GameStateHuman | null = null;
+let currentGame: MinMaxGameHuman | null = null;
 
 async function initWasm(): Promise<void> {
 	if (wasmReady) return;
@@ -24,14 +24,18 @@ self.onmessage = async (event) => {
 
 	if (type === "data") {
 		if (currentGame !== null) {
-			currentGame.take_input(event_data.data);
+			try {
+				currentGame.take_input(event_data.data);
 
-			if (currentGame.is_error()) {
+				if (currentGame.is_error()) {
-				currentGame = null;
+					currentGame = null;
-				self.postMessage({ type: "complete" });
+					self.postMessage({ type: "complete" });
-			} else if (currentGame.is_done()) {
+				} else if (currentGame.is_done()) {
-				currentGame = null;
+					currentGame = null;
-				self.postMessage({ type: "complete" });
+					self.postMessage({ type: "complete" });
+				}
+			} catch (error) {
+				self.postMessage({ type: "error", error: String(error) });
 			}
 		}
 	} else if (type === "init") {
@@ -53,7 +57,7 @@ self.onmessage = async (event) => {
 				self.postMessage({ type: "terminal", line });
 			};
 
-			currentGame = new GameStateHuman(
+			currentGame = new MinMaxGameHuman(
 				event_data.script,
 				appendOutput,
 				appendOutput,

webui/src/styles/Playground.module.css

@@ -117,6 +117,31 @@
 	margin-bottom: 6px;
 }
 
+.saveInput {
+	width: 100%;
+	padding: 6px 8px;
+	background: #3c3c3c;
+	color: #e0e0e0;
+	border: 1px solid #555;
+	border-radius: 3px;
+	font-size: 13px;
+	outline: none;
+}
+
+.saveInput:focus {
+	border-color: #007acc;
+	box-shadow: 0 0 3px rgba(0, 122, 204, 0.3);
+}
+
+.saveInput::placeholder {
+	color: #999;
+}
+
+.saveSection {
+	margin-top: 24px;
+	padding-top: 16px;
+	border-top: 1px solid #444;
+}
 
 .helpPanel {
 	padding: 16px;