Agent library

agents/greed.rhai

@@ -0,0 +1,169 @@
+
+
+// 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);
+	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)
+}

rust/runner/src/gamestate.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 }
 				}
 

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);
 		});
 
@@ -129,7 +145,7 @@ 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 {
@@ -38,11 +39,39 @@ fn step_max(board) {
 	return random_action(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 [bulkRounds, setBulkRounds] = useState(1000);
+	const [selectedAgent, setSelectedAgent] = useState("Random");
 	const [isHelpOpen, setIsHelpOpen] = useState(false);
 
 	const editorRef = useRef<any>(null);
@@ -85,11 +114,14 @@ 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"
 			);
 		}
 
@@ -101,7 +133,7 @@ export default function Playground() {
 			resultRef.current.value = "";
 		}
 
-		if (runDisabled || !editorRef.current) return;
+		if (runDisabled) return;
 
 		setIsScriptRunning(true);
 
@@ -109,8 +141,16 @@ export default function Playground() {
 			terminalRef.current?.clear();
 			terminalRef.current?.focus();
 
+			const agentCode = AGENTS[selectedAgent as keyof typeof AGENTS];
+			const blueScript =
+				agentCode || (editorRef.current?.getValue() ?? "");
+			const redScript = editorRef.current?.getValue() ?? "";
+			const opponentName = agentCode ? selectedAgent : "script";
+
 			await startScriptBulk(
-				editorRef.current.getValue(),
+				redScript,
+				blueScript,
+				opponentName,
 				(line: string) => {
 					if (resultRef.current) {
 						let v = resultRef.current.value + line + "\n";
@@ -130,16 +170,19 @@ export default function Playground() {
 				bulkRounds
 			);
 		} catch (ex) {
-				if (resultRef.current) {
+			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]);
 
 	const stopScriptHandler = useCallback(() => {
 		stopScript();
@@ -204,6 +247,15 @@ export default function Playground() {
 										onChange={setBulkRounds}
 										unit=""
 									/>
+									<div className={styles.configField}>
+										<label>Bulk opponent</label>
+										<AgentSelector
+											agents={Object.keys(AGENTS)}
+											selectedAgent={selectedAgent}
+											onSelect={setSelectedAgent}
+											placeholder="Select an agent..."
+										/>
+									</div>
 								</div>
 							}
 						/>
@@ -257,100 +309,243 @@ 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/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/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 +105,19 @@
 	min-width: 250px;
 }
 
+.configField {
+	margin-top: 16px;
+}
+
+.configField label {
+	display: block;
+	font-size: 13px;
+	font-weight: 600;
+	color: #cccccc;
+	margin-bottom: 6px;
+}
+
+
 .helpPanel {
 	padding: 16px;
 	width: 300px;