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

@@ -0,0 +1,161 @@
+// 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 place_op(board, minimize) {
+	let ops = ["+", "-", "*", "/"];
+	let available_ops = ops.retain(|x| board.contains(x));
+
+ 	// Place operations first,
+	// they matter much more than numbers
+	let give_up = 10;
+ 	if !available_ops.is_empty() {
+		let aa = available_ops.rand_shuffle();
+		let pos = rand_int(0, 10);
+		let action = Action(aa[0], pos);
+
+		while !board.can_play(action) {
+			let pos = rand_int(0, 10);
+			action = Action(aa[0], pos);
+
+			// In case there are no valid operator moves
+			give_up -= 1;
+			if give_up == 0 { break }
+		}
+
+		return action
+	}
+
+	// Could not place an operation
+	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);
+	}
+
+	// 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)
+}
+
+// Maximizer step
+fn step_max(board) {
+	greed_step(board, false)
+}

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)
+}

agents/random.rhai

@@ -0,0 +1,21 @@
+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) {
+	random_action(board)
+}
+
+fn step_max(board) {
+	random_action(board)
+}

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 gamestatehuman;
+mod minmaxgame;
+mod minmaxgamehuman;
 mod terminput;
 
 #[global_allocator]

rust/runner/src/minmaxgame.rs

@@ -251,6 +251,7 @@ impl MinMaxGame {
 				(GameState::Red, Some(red_score)) => {
 					self.board = Board::new();
 					self.is_first_print = true;
+					self.is_red_turn = false;
 					self.state = GameState::Blue { red_score }
 				}
 

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

@@ -50,13 +50,24 @@ interface EditorProps {
 	fontSize?: number;
 }
 
+const STORAGE_KEY = "minimax-editor-content";
+
 export const Editor = forwardRef<any, EditorProps>(function Editor(
 	{ initialValue = "", onChange, onReady, fontSize = 14 },
 	ref
 ) {
 	const textareaRef = useRef<HTMLTextAreaElement>(null);
 	const editorRef = useRef<any>(null);
-	const [content, setContent] = useState(initialValue);
+
+	const getInitialContent = () => {
+		if (typeof window !== "undefined") {
+			const saved = localStorage.getItem(STORAGE_KEY);
+			return saved || initialValue;
+		}
+		return initialValue;
+	};
+
+	const [content, setContent] = useState(getInitialContent);
 
 	useImperativeHandle(ref, () => editorRef.current);
 
@@ -100,6 +111,11 @@ export const Editor = forwardRef<any, EditorProps>(function Editor(
 		editor.on("change", (instance: any, changes: any) => {
 			const newContent = instance.getValue();
 			setContent(newContent);
+
+			if (typeof window !== "undefined") {
+				localStorage.setItem(STORAGE_KEY, newContent);
+			}
+
 			onChange?.(instance, changes);
 		});
 
@@ -112,7 +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(() => {
@@ -129,7 +146,7 @@ export const Editor = forwardRef<any, EditorProps>(function Editor(
 		<div className={styles.editorContainer}>
 			<textarea
 				ref={textareaRef}
-				defaultValue={initialValue}
+				defaultValue={content}
 				placeholder="Code goes here"
 			/>
 		</div>

webui/src/components/Playground.tsx

@@ -5,6 +5,7 @@ import { Button } from "@/components/ui/Button";
 import { Dropdown } from "@/components/ui/Dropdown";
 import { Slider } from "@/components/ui/Slider";
 import { SidePanel } from "@/components/ui/SidePanel";
+import { AgentSelector } from "@/components/ui/AgentSelector";
 import { Editor } from "@/components/Editor";
 import { Terminal, TerminalRef } from "@/components/Terminal";
 import {
@@ -15,8 +16,7 @@ import {
 } from "@/lib/runner";
 import styles from "@/styles/Playground.module.css";
 
-const initialCode = `
-fn random_action(board) {
+const initialCode = `fn random_action(board) {
 	let symb = rand_symb();
 	let pos = rand_int(0, 10);
 	let action = Action(symb, pos);
@@ -37,15 +37,45 @@ fn step_min(board) {
 
 fn step_max(board) {
 	return random_action(board);
-}
-`;
+}`;
+
+const AGENTS = {
+	// special-cased below
+	Self: undefined,
+};
 
 export default function Playground() {
 	const [isScriptRunning, setIsScriptRunning] = useState(false);
 	const [isEditorReady, setIsEditorReady] = useState(false);
-	const [fontSize, setFontSize] = useState(14);
-	const [bulkRounds, setBulkRounds] = useState(1000);
+	const [fontSize, setFontSize] = useState(() => {
+		if (typeof window !== "undefined") {
+			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);
@@ -54,6 +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 ${scriptName}:`,
+								error
+							);
+						}
+					})
+				);
+
+				setSavedScripts(scriptContents);
+
+				// Combine hardcoded agents with saved scripts, ensuring Self and Random are first
+				const combinedAgents = [
+					"Self",
+					...Object.keys(AGENTS).filter((key) => key !== "Self"),
+					...scripts,
+				];
+
+				setAvailableAgents(combinedAgents);
+			}
+		} catch (error) {
+			console.error("Failed to load saved scripts:", error);
+			// Fallback to hardcoded agents only
+			setAvailableAgents(Object.keys(AGENTS));
+		}
+	}, []);
+
+	// Load saved scripts on component mount
+	useEffect(() => {
+		loadSavedScripts();
+	}, [loadSavedScripts]);
+
+	// Save font size to localStorage
+	useEffect(() => {
+		if (typeof window !== "undefined") {
+			localStorage.setItem("playground-fontSize", fontSize.toString());
+		}
+	}, [fontSize]);
+
+	// Save bulk rounds to localStorage
+	useEffect(() => {
+		if (typeof window !== "undefined") {
+			localStorage.setItem(
+				"playground-bulkRounds",
+				bulkRounds.toString()
+			);
+		}
+	}, [bulkRounds]);
+
+	// Save selected agent to localStorage
+	useEffect(() => {
+		if (typeof window !== "undefined") {
+			localStorage.setItem("playground-selectedAgent", selectedAgent);
+		}
+	}, [selectedAgent]);
+
 	const runHuman = useCallback(async () => {
 		if (resultRef.current) {
 			resultRef.current.value = "";
@@ -87,11 +197,14 @@ export default function Playground() {
 				}
 			);
 		} catch (ex) {
+			console.error(ex);
 			if (resultRef.current) {
 				resultRef.current.value += `\nScript exited with error:\n${ex}\n`;
 			}
 			terminalRef.current?.write(
-				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" + String(ex).replace("\n", "\n\r") + "\r\n"
+				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" +
+					String(ex).replace("\n", "\n\r") +
+					"\r\n"
 			);
 		}
 
@@ -103,7 +216,7 @@ export default function Playground() {
 			resultRef.current.value = "";
 		}
 
-		if (runDisabled || !editorRef.current) return;
+		if (runDisabled) return;
 
 		setIsScriptRunning(true);
 
@@ -111,8 +224,20 @@ export default function Playground() {
 			terminalRef.current?.clear();
 			terminalRef.current?.focus();
 
+			// 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 =
+				agentScript || (editorRef.current?.getValue() ?? "");
+			const redScript = editorRef.current?.getValue() ?? "";
+			const opponentName = agentScript ? selectedAgent : "script";
+
 			await startScriptBulk(
-				editorRef.current.getValue(),
+				redScript,
+				blueScript,
+				opponentName,
 				(line: string) => {
 					if (resultRef.current) {
 						let v = resultRef.current.value + line + "\n";
@@ -132,21 +257,104 @@ export default function Playground() {
 				bulkRounds
 			);
 		} catch (ex) {
+			console.error(ex);
 			if (resultRef.current) {
 				resultRef.current.value += `\nScript exited with error:\n${ex}\n`;
 			}
 			terminalRef.current?.write(
-				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" + String(ex).replace("\n", "\n\r") + "\r\n"
+				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" +
+					String(ex).replace("\n", "\n\r") +
+					"\r\n"
 			);
 		}
 
 		setIsScriptRunning(false);
-	}, [runDisabled, bulkRounds]);
+	}, [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}>
@@ -206,6 +414,72 @@ export default function Playground() {
 										onChange={setBulkRounds}
 										unit=""
 									/>
+									<div className={styles.configField}>
+										<label>Bulk opponent</label>
+										<AgentSelector
+											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>
 							}
 						/>
@@ -259,100 +533,243 @@ export default function Playground() {
 				<h2>Game Rules</h2>
 
 				<p>
-					This game is played in two rounds,
-					on an empty eleven-space board.
-					The first round is played on {"Red's"} board, the second is played on {"Blue's"}.
+					This game is played in two rounds, on an empty eleven-space
+					board. The first round is played on {"Red's"} board, the
+					second is played on {"Blue's"}.
 				</p>
 
 				<p>
-				On {"Red's"} board, {"Red's"} goal is to maximize the value of the expression.
-				{" Blue's"} goal is to minimize it.
-
-				Players take turns placing the fourteen symbols <code>0123456789+-×÷</code>
-				on the board, with the maximizing player taking the first move.
+					On {"Red's"} board, {"Red's"} goal is to maximize the value
+					of the expression.
+					{" Blue's"} goal is to minimize it. Players take turns
+					placing the fourteen symbols <code>0123456789+-×÷</code>
+					on the board, with the maximizing player taking the first
+					move.
 				</p>
 
 				<p>
-				A {"board's"} syntax must always be valid, and
-				the following rules are enforced:
+					A {"board's"} syntax must always be valid, and the following
+					rules are enforced:
 				</p>
 
 				<ol>
 					<li>Each symbol may only be used once</li>
-					<li>The binary operators <code>+-×÷</code> may not be next to one another, and may not be at the end slots.</li>
-					<li>The unary operator <code>-</code> (negative) must have a number as an argument. Therefore, it cannot be left of an operator (like <code>-×</code>), and it may not be in the rightmost slot.</li>
-					<li>Unary <code>+</code> may not be used.</li>
-					<li> <code>0</code> may not follow <code>÷</code>.
-					This prevents most cases of zero-division, but {"isn't perfect"}.
-					<code>÷-0</code> will result in an invalid board (causing a draw),
-					and <code>÷0_+</code> is forbidden despite being valid syntax once the empty slot is filled.
-					This is done to simplyify game logic, and might be improved later.
+					<li>
+						The binary operators <code>+-×÷</code> may not be next
+						to one another, and may not be at the end slots.
+					</li>
+					<li>
+						The unary operator <code>-</code> (negative) must have a
+						number as an argument. Therefore, it cannot be left of
+						an operator (like <code>-×</code>), and it may not be in
+						the rightmost slot.
+					</li>
+					<li>
+						Unary <code>+</code> may not be used.
+					</li>
+					<li>
+						{" "}
+						<code>0</code> may not follow <code>÷</code>. This
+						prevents most cases of zero-division, but{" "}
+						{"isn't perfect"}.<code>÷-0</code> will result in an
+						invalid board (causing a draw), and <code>÷0_+</code> is
+						forbidden despite being valid syntax once the empty slot
+						is filled. This is done to simplyify game logic, and
+						might be improved later.
 					</li>
 					<li>Division by zero results in a draw.</li>
-					<li>An incomplete board with no valid moves results in a draw.</li>
+					<li>
+						An incomplete board with no valid moves results in a
+						draw.
+					</li>
 				</ol>
 
 				<h2>How to Play</h2>
 				<ol>
-					<li>Click <strong>Run</strong> to start a single game. Play against your agent in the terminal. Use your arrow keys (up, down, left, right) to select a symbol. Use enter or space to make a move.</li>
-					<li>Click <strong>Bulk Run</strong> to collect statistics from a many games.</li>
+					<li>
+						Click <strong>Run</strong> to start a single game. Play
+						against your agent in the terminal. Use your arrow keys
+						(up, down, left, right) to select a symbol. Use enter or
+						space to make a move.
+					</li>
+					<li>
+						Click <strong>Bulk Run</strong> to collect statistics
+						from a many games.
+					</li>
 				</ol>
 
-
 				<h2>Overview</h2>
 				<ul>
-					<li><code>step_min()</code> is called once per turn with the {"board's"} current state. This function must return an <code>Action</code> that aims to minimize the total value of the board.</li>
-					<li><code>step_max()</code> is just like <code>step_min</code>, but should aim to maximize the value of the board. </li>
-					<li>Agent code may not be edited between games. Start a new game to use new code.</li>
-					<li>If your agent takes more than 5 seconds to compute a move, the script will exit with an error.</li>
+					<li>
+						<code>step_min()</code> is called once per turn with the{" "}
+						{"board's"} current state. This function must return an{" "}
+						<code>Action</code> that aims to minimize the total
+						value of the board.
+					</li>
+					<li>
+						<code>step_max()</code> is just like{" "}
+						<code>step_min</code>, but should aim to maximize the
+						value of the board.{" "}
+					</li>
+					<li>
+						Agent code may not be edited between games. Start a new
+						game to use new code.
+					</li>
+					<li>
+						If your agent takes more than 5 seconds to compute a
+						move, the script will exit with an error.
+					</li>
 				</ul>
 
 				<h2>Rhai basics</h2>
 				<p>
-					Agents are written in <a href="https://rhai.rs">Rhai</a>, a wonderful embedded scripting language powered by Rust.
-					Basic language features are outlined below.
+					Agents are written in <a href="https://rhai.rs">Rhai</a>, a
+					wonderful embedded scripting language powered by Rust. Basic
+					language features are outlined below.
 				</p>
 				<ul>
-					<li>All statements must be followed by a <code>;</code></li>
-					<li>Use <code>return</code> to return a value from a function.</li>
-					<li><code>print(anything)</code> - Prints to the output panel. Prefer this over <code>debug</code>.</li>
-					<li><code>debug(anything)</code> - Prints to the output panel. Includes extra debug info.</li>
-					<li><code>()</code> is the {"\"none\""} type, returned by some methods above.</li>
-					<li><code>for i in 0..5 {"{}"}</code> will iterate five times, with <code>i = 0, 1, 2, 3, 4</code></li>
-					<li><code>for i in 0..=5 {"{}"}</code> will iterate six times, with <code>i = 0, 1, 2, 3, 4, 5</code></li>
-					<li><code>let a = [];</code> initializes an empty array.</li>
-					<li><code>a.push(value)</code> adds a value to the end of an array</li>
-					<li><code>a.pop()</code> removes a value from the end of an array and returns it</li>
-					<li><code>a[0]</code> returns the first item of an array</li>
-					<li><code>a[1]</code> returns the second item of an array</li>
-					<li>Refer to <a href="https://rhai.rs/book/language/values-and-types.html">the Rhai book</a> for more details.</li>
+					<li>
+						All statements must be followed by a <code>;</code>
+					</li>
+					<li>
+						Use <code>return</code> to return a value from a
+						function.
+					</li>
+					<li>
+						<code>print(anything)</code> - Prints to the output
+						panel. Prefer this over <code>debug</code>.
+					</li>
+					<li>
+						<code>debug(anything)</code> - Prints to the output
+						panel. Includes extra debug info.
+					</li>
+					<li>
+						<code>()</code> is the {'"none"'} type, returned by some
+						methods above.
+					</li>
+					<li>
+						<code>for i in 0..5 {"{}"}</code> will iterate five
+						times, with <code>i = 0, 1, 2, 3, 4</code>
+					</li>
+					<li>
+						<code>for i in 0..=5 {"{}"}</code> will iterate six
+						times, with <code>i = 0, 1, 2, 3, 4, 5</code>
+					</li>
+					<li>
+						<code>let a = [];</code> initializes an empty array.
+					</li>
+					<li>
+						<code>a.push(value)</code> adds a value to the end of an
+						array
+					</li>
+					<li>
+						<code>a.pop()</code> removes a value from the end of an
+						array and returns it
+					</li>
+					<li>
+						<code>a[0]</code> returns the first item of an array
+					</li>
+					<li>
+						<code>a[1]</code> returns the second item of an array
+					</li>
+					<li>
+						Refer to{" "}
+						<a href="https://rhai.rs/book/language/values-and-types.html">
+							the Rhai book
+						</a>{" "}
+						for more details.
+					</li>
 				</ul>
 
 				<h2>Notable Functions</h2>
 				<ul>
-					<li><code>Action(symbol, position)</code> - Creates a new action that places <code>symbol</code> at <code>position</code>. Valid symbols are <code>01234567890+-/*</code>. Both <code>0</code> and <code>{"\"0\""}</code> are valid symbols.</li>
-					<li><code>board.can_play(action)</code> - Checks if an action is valid. Returns a boolean.</li>
-					<li><code>board.size()</code> - Return the total number of spots on this board.</li>
-					<li><code>board.free_spots()</code> - Count the number of free spots on the board.</li>
-					<li><code>board.play(action)</code> - Apply the given action on this board. This mutates the <code>board</code>, but does NOT make the move in the game. The only way to commit to an action is to return it from <code>step_min</code> or <code>step_max</code>.
-						This method lets you compute potential values of a board when used with <code>board.evaluate()</code>.
+					<li>
+						<code>Action(symbol, position)</code> - Creates a new
+						action that places <code>symbol</code> at{" "}
+						<code>position</code>. Valid symbols are{" "}
+						<code>01234567890+-/*</code>. Both <code>0</code> and{" "}
+						<code>{'"0"'}</code> are valid symbols.
+					</li>
+					<li>
+						<code>board.can_play(action)</code> - Checks if an
+						action is valid. Returns a boolean.
+					</li>
+					<li>
+						<code>board.size()</code> - Return the total number of
+						spots on this board.
+					</li>
+					<li>
+						<code>board.free_spots()</code> - Count the number of
+						free spots on the board.
+					</li>
+					<li>
+						<code>board.play(action)</code> - Apply the given action
+						on this board. This mutates the <code>board</code>, but
+						does NOT make the move in the game. The only way to
+						commit to an action is to return it from{" "}
+						<code>step_min</code> or <code>step_max</code>. This
+						method lets you compute potential values of a board when
+						used with <code>board.evaluate()</code>.
+					</li>
+					<li>
+						<code>board.ith_free_slot(idx)</code> - Returns the
+						index of the <code>n</code>th free slot on this board.
+						Returns <code>-1</code> if no such slot exists.
+					</li>
+					<li>
+						<code>board.contains(symbol)</code> - Checks if this
+						board contains the given symbol. Returns a boolean.
+					</li>
+					<li>
+						<code>board.evaluate()</code> - Return the value of a
+						board if it can be computed. Returns <code>()</code>{" "}
+						otherwise.
+					</li>
+					<li>
+						<code>board.free_spots_idx(action)</code> - Checks if an
+						action is valid. Returns a boolean.
+					</li>
+					<li>
+						<code>for i in board {"{ ... }"}</code> - Iterate over
+						all slots on this board. Items are returned as strings,
+						empty slots are the empty string (<code>{'""'}</code>)
+					</li>
+					<li>
+						<code>is_op(symbol)</code> - Returns <code>true</code>{" "}
+						if <code>symbol</code> is one of <code>+-*/</code>
 					</li>
-					<li><code>board.ith_free_slot(idx)</code> - Returns the index of the <code>n</code>th free slot on this board. Returns <code>-1</code> if no such slot exists.</li>
-					<li><code>board.contains(symbol)</code> - Checks if this board contains the given symbol. Returns a boolean.</li>
-					<li><code>board.evaluate()</code> - Return the value of a board if it can be computed. Returns <code>()</code> otherwise.</li>
-					<li><code>board.free_spots_idx(action)</code> - Checks if an action is valid. Returns a boolean.</li>
-					<li><code>for i in board {"{ ... }"}</code> - Iterate over all slots on this board. Items are returned as strings, empty slots are the empty string (<code>{"\"\""}</code>)</li>
-					<li><code>is_op(symbol)</code> - Returns <code>true</code> if <code>symbol</code> is one of <code>+-*/</code></li>
 
-					<li><code>rand_symb()</code> - Returns a random symbol (number or operation)</li>
-					<li><code>rand_op()</code> - Returns a random operator symbol (one of <code>+-*/</code>)</li>
-					<li><code>rand_action()</code> - Returns a random <code>Action</code></li>
-					<li><code>rand_int(min, max)</code> - Returns a random integer between min and max, including both endpoints.</li>
-					<li><code>rand_bool(probability)</code> - Return <code>true</code> with the given probability. Otherwise return <code>false</code>.</li>
-					<li><code>rand_shuffle(array)</code> - Shuffle the given array</li>
-					<li><code>for p in permutations(array, 5) {"{}"}</code> - Iterate over all permutations of 5 elements of the given array.</li>
+					<li>
+						<code>rand_symb()</code> - Returns a random symbol
+						(number or operation)
+					</li>
+					<li>
+						<code>rand_op()</code> - Returns a random operator
+						symbol (one of <code>+-*/</code>)
+					</li>
+					<li>
+						<code>rand_action()</code> - Returns a random{" "}
+						<code>Action</code>
+					</li>
+					<li>
+						<code>rand_int(min, max)</code> - Returns a random
+						integer between min and max, including both endpoints.
+					</li>
+					<li>
+						<code>rand_bool(probability)</code> - Return{" "}
+						<code>true</code> with the given probability. Otherwise
+						return <code>false</code>.
+					</li>
+					<li>
+						<code>rand_shuffle(array)</code> - Shuffle the given
+						array
+					</li>
+					<li>
+						<code>for p in permutations(array, 5) {"{}"}</code> -
+						Iterate over all permutations of 5 elements of the given
+						array.
+					</li>
 				</ul>
-
 			</SidePanel>
 		</div>
 	);

webui/src/components/Terminal.tsx

@@ -98,7 +98,7 @@ async function init_term(
 
 	const term = new Terminal({
 		//"fontFamily": "Fantasque",
-		rows: 30,
+		rows: 24,
 		fontSize: fontSize ?? 18,
 		tabStopWidth: 4,
 		cursorBlink: false,

webui/src/components/ui/AgentSelector.tsx

@@ -0,0 +1,191 @@
+"use client";
+
+import { useState, useRef, useEffect } from "react";
+import { ChevronDown, Search } from "lucide-react";
+import clsx from "clsx";
+import styles from "@/styles/AgentSelector.module.css";
+
+interface AgentSelectorProps {
+	agents: string[];
+	selectedAgent: string;
+	onSelect: (agent: string) => void;
+	placeholder?: string;
+}
+
+export function AgentSelector({
+	agents,
+	selectedAgent,
+	onSelect,
+	placeholder = "Select an agent..."
+}: AgentSelectorProps) {
+	const [isOpen, setIsOpen] = useState(false);
+	const [searchTerm, setSearchTerm] = useState("");
+	const [highlightedIndex, setHighlightedIndex] = useState(0);
+	const [dropdownPosition, setDropdownPosition] = useState({ top: 0, left: 0, width: 0 });
+	const dropdownRef = useRef<HTMLDivElement>(null);
+	const triggerRef = useRef<HTMLButtonElement>(null);
+	const searchRef = useRef<HTMLInputElement>(null);
+
+	const filteredAgents = agents.filter(agent =>
+		agent.toLowerCase().includes(searchTerm.toLowerCase())
+	);
+
+	useEffect(() => {
+		function handleClickOutside(event: MouseEvent) {
+			if (
+				dropdownRef.current &&
+				!dropdownRef.current.contains(event.target as Node)
+			) {
+				setIsOpen(false);
+				setSearchTerm("");
+			}
+		}
+
+		if (isOpen) {
+			document.addEventListener("mousedown", handleClickOutside);
+		}
+
+		return () => {
+			document.removeEventListener("mousedown", handleClickOutside);
+		};
+	}, [isOpen]);
+
+	useEffect(() => {
+		if (isOpen && searchRef.current) {
+			searchRef.current.focus();
+		}
+	}, [isOpen]);
+
+	useEffect(() => {
+		setHighlightedIndex(0);
+	}, [searchTerm]);
+
+	const handleKeyDown = (e: React.KeyboardEvent) => {
+		if (!isOpen) {
+			if (e.key === "Enter" || e.key === " " || e.key === "ArrowDown") {
+				e.preventDefault();
+				updateDropdownPosition();
+				setIsOpen(true);
+			}
+			return;
+		}
+
+		switch (e.key) {
+			case "ArrowDown":
+				e.preventDefault();
+				setHighlightedIndex(prev =>
+					prev < filteredAgents.length - 1 ? prev + 1 : 0
+				);
+				break;
+			case "ArrowUp":
+				e.preventDefault();
+				setHighlightedIndex(prev =>
+					prev > 0 ? prev - 1 : filteredAgents.length - 1
+				);
+				break;
+			case "Enter":
+				e.preventDefault();
+				if (filteredAgents[highlightedIndex]) {
+					onSelect(filteredAgents[highlightedIndex]);
+					setIsOpen(false);
+					setSearchTerm("");
+				}
+				break;
+			case "Escape":
+				e.preventDefault();
+				setIsOpen(false);
+				setSearchTerm("");
+				break;
+		}
+	};
+
+	const handleSelect = (agent: string) => {
+		onSelect(agent);
+		setIsOpen(false);
+		setSearchTerm("");
+	};
+
+	const updateDropdownPosition = () => {
+		if (triggerRef.current) {
+			const rect = triggerRef.current.getBoundingClientRect();
+			setDropdownPosition({
+				top: rect.bottom + 2,
+				left: rect.left,
+				width: rect.width
+			});
+		}
+	};
+
+	const handleOpen = () => {
+		updateDropdownPosition();
+		setIsOpen(!isOpen);
+	};
+
+	return (
+		<div className={styles.agentSelector} ref={dropdownRef}>
+			<button
+				ref={triggerRef}
+				className={clsx(styles.trigger, isOpen && styles.triggerOpen)}
+				type="button"
+				onClick={handleOpen}
+				onKeyDown={handleKeyDown}
+				aria-expanded={isOpen}
+				aria-haspopup="listbox"
+			>
+				<span className={styles.triggerText}>
+					{selectedAgent || placeholder}
+				</span>
+				<ChevronDown
+					size={16}
+					className={clsx(styles.chevron, isOpen && styles.chevronOpen)}
+				/>
+			</button>
+
+			{isOpen && (
+				<div
+					className={styles.dropdown}
+					style={{
+						top: dropdownPosition.top,
+						left: dropdownPosition.left,
+						width: Math.max(dropdownPosition.width, 200)
+					}}
+				>
+					<div className={styles.searchContainer}>
+						<Search size={16} className={styles.searchIcon} />
+						<input
+							ref={searchRef}
+							type="text"
+							className={styles.searchInput}
+							placeholder="Search agents..."
+							value={searchTerm}
+							onChange={(e) => setSearchTerm(e.target.value)}
+							onKeyDown={handleKeyDown}
+						/>
+					</div>
+
+					<ul className={styles.agentList} role="listbox">
+						{filteredAgents.length === 0 ? (
+							<li className={styles.noResults}>No agents found</li>
+						) : (
+							filteredAgents.map((agent, index) => (
+								<li
+									key={agent}
+									className={clsx(
+										styles.agentOption,
+										agent === selectedAgent && styles.selected,
+										index === highlightedIndex && styles.highlighted
+									)}
+									onClick={() => handleSelect(agent)}
+									role="option"
+									aria-selected={agent === selectedAgent}
+								>
+									{agent}
+								</li>
+							))
+						)}
+					</ul>
+				</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/runner.ts

@@ -53,7 +53,9 @@ export async function startScript(
 }
 
 export async function startScriptBulk(
-	script: string,
+	redScript: string,
+	blueScript: string,
+	opponentName: string,
 	appendOutput: (line: string) => void,
 	appendTerminal: (line: string) => void,
 	rounds: number = 1000
@@ -93,7 +95,7 @@ export async function startScriptBulk(
 			reject(error);
 		};
 
-		worker.postMessage({ type: "run", script, rounds });
+		worker.postMessage({ type: "run", redScript, blueScript, opponentName, rounds });
 	});
 }
 

webui/src/lib/worker_bulk.ts

@@ -56,11 +56,11 @@ self.onmessage = async (event) => {
 				appendTerminal(`============\n\n\r`);
 
 				currentGame = new MinMaxGame(
-					event_data.script,
+					event_data.redScript,
 					() => {},
 					() => {},
 
-					event_data.script,
+					event_data.blueScript,
 					() => {},
 					() => {},
 
@@ -89,13 +89,19 @@ self.onmessage = async (event) => {
 			}
 
 			const elapsed = Math.round((performance.now() - start) / 100) / 10;
-			const r_winrate = Math.round((red_wins / n_rounds) * 1000) / 10
-			const b_winrate = Math.round((blue_wins / n_rounds) * 1000) / 10
+			const r_winrate = Math.round((red_wins / n_rounds) * 1000) / 10;
+			const b_winrate = Math.round((blue_wins / n_rounds) * 1000) / 10;
+
+			const opponentName = event_data.opponentName || "Unknown";
 
 			appendTerminal("\r\n");
 			appendTerminal(`Ran ${n_rounds} rounds in ${elapsed}s\r\n`);
-			appendTerminal(`Red won:  ${red_wins} (${r_winrate}%)\r\n`);
-			appendTerminal(`Blue won: ${blue_wins} (${b_winrate}%)\r\n`);
+			appendTerminal(
+				`Red won:  ${red_wins} (${r_winrate}%) (script)\r\n`
+			);
+			appendTerminal(
+				`Blue won: ${blue_wins} (${b_winrate}%) (${opponentName})\r\n`
+			);
 			appendTerminal("\r\n");
 			appendTerminal(`Draws:    ${draw_score}\r\n`);
 			appendTerminal(`Invalid:  ${draw_invalid}\r\n`);

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;
@@ -24,6 +24,7 @@ self.onmessage = async (event) => {
 
 	if (type === "data") {
 		if (currentGame !== null) {
+			try {
 				currentGame.take_input(event_data.data);
 
 				if (currentGame.is_error()) {
@@ -33,6 +34,9 @@ self.onmessage = async (event) => {
 					currentGame = null;
 					self.postMessage({ type: "complete" });
 				}
+			} catch (error) {
+				self.postMessage({ type: "error", error: String(error) });
+			}
 		}
 	} else if (type === "init") {
 		try {
@@ -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/AgentSelector.module.css

@@ -0,0 +1,143 @@
+.agentSelector {
+	position: relative;
+	width: 100%;
+}
+
+.trigger {
+	width: 100%;
+	padding: 6px 8px;
+	background: #3c3c3c;
+	color: #e0e0e0;
+	border: 1px solid #555;
+	border-radius: 3px;
+	font-size: 13px;
+	outline: none;
+	cursor: pointer;
+	display: flex;
+	align-items: center;
+	justify-content: space-between;
+	transition: border-color 0.2s;
+}
+
+.trigger:hover {
+	border-color: #666;
+}
+
+.trigger:focus,
+.triggerOpen {
+	border-color: #007acc;
+	box-shadow: 0 0 3px rgba(0, 122, 204, 0.3);
+}
+
+.triggerText {
+	flex: 1;
+	text-align: left;
+	white-space: nowrap;
+	overflow: hidden;
+	text-overflow: ellipsis;
+}
+
+.chevron {
+	transition: transform 0.2s;
+	flex-shrink: 0;
+	margin-left: 8px;
+}
+
+.chevronOpen {
+	transform: rotate(180deg);
+}
+
+.dropdown {
+	position: fixed;
+	z-index: 10000;
+	background: #2d2d30;
+	border: 1px solid #555;
+	border-radius: 3px;
+	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
+	margin-top: 2px;
+	max-height: 300px;
+	overflow: hidden;
+	display: flex;
+	flex-direction: column;
+	min-width: 200px;
+}
+
+.searchContainer {
+	position: relative;
+	padding: 8px;
+	border-bottom: 1px solid #555;
+}
+
+.searchIcon {
+	position: absolute;
+	left: 16px;
+	top: 50%;
+	transform: translateY(-50%);
+	color: #999;
+}
+
+.searchInput {
+	width: 100%;
+	padding: 6px 8px 6px 32px;
+	background: #3c3c3c;
+	color: #e0e0e0;
+	border: 1px solid #555;
+	border-radius: 3px;
+	font-size: 13px;
+	outline: none;
+}
+
+.searchInput:focus {
+	border-color: #007acc;
+	box-shadow: 0 0 3px rgba(0, 122, 204, 0.3);
+}
+
+.searchInput::placeholder {
+	color: #999;
+}
+
+.agentList {
+	list-style: none;
+	margin: 0;
+	padding: 0;
+	overflow-y: auto;
+	flex: 1;
+}
+
+.agentOption {
+	padding: 8px 12px;
+	cursor: pointer;
+	font-size: 13px;
+	color: #e0e0e0;
+	transition: background-color 0.15s;
+	white-space: nowrap;
+	overflow: hidden;
+	text-overflow: ellipsis;
+}
+
+.agentOption:hover,
+.highlighted {
+	background: #404040;
+}
+
+.agentOption:active {
+	background: #4a4a4a;
+}
+
+.selected {
+	background: #007acc;
+	color: white;
+}
+
+.selected:hover,
+.selected.highlighted {
+	background: #0088dd;
+}
+
+.noResults {
+	padding: 12px;
+	text-align: center;
+	color: #999;
+	font-style: italic;
+	font-size: 13px;
+}

webui/src/styles/Playground.module.css

@@ -105,6 +105,44 @@
 	min-width: 250px;
 }
 
+.configField {
+	margin-top: 16px;
+}
+
+.configField label {
+	display: block;
+	font-size: 13px;
+	font-weight: 600;
+	color: #cccccc;
+	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;
 	width: 300px;