feat(tui): improve editor Ctrl/Alt word and line deletion shortcuts

- Add Ctrl+W for word deletion (stops at whitespace/punctuation)
- Add Ctrl+U for delete to start of line (merges with previous line at col 0)
- Change Ctrl+K from delete entire line to delete to end of line (merges with next line at EOL)
- Add Option+Backspace support in Ghostty (maps to Ctrl+W via ESC+DEL sequence)
- Cmd+Backspace in Ghostty works as Ctrl+U (terminal sends same control code)
- Update README and CHANGELOG with new keyboard shortcuts

Fixes #2, Fixes #3

AGENTS.md

@@ -10,4 +10,5 @@
 - If you are working with an external API, check node_modules for the type definitions as needed instead of assuming things.
 - Always run `npm run check` in the project's root directory after making code changes.
 - You must NEVER run `npm run dev` yourself. Doing is means you failed the user hard.
-- Do NOT commit unless asked to by the user
+- Do NOT commit unless asked to by the user
+- Keep you answers short and concise and to the point.

packages/ai/src/models.generated.ts

@@ -1898,9 +1898,9 @@ export const MODELS = {
 			reasoning: true,
 			input: ["text", "image"],
 			cost: {
-				input: 1.5,
-				output: 6,
-				cacheRead: 0.375,
+				input: 0.25,
+				output: 2,
+				cacheRead: 0.024999999999999998,
 				cacheWrite: 0,
 			},
 			contextWindow: 400000,
@@ -2289,13 +2289,13 @@ export const MODELS = {
 			reasoning: true,
 			input: ["text"],
 			cost: {
-				input: 0.6,
-				output: 2.2,
+				input: 0.44999999999999996,
+				output: 1.9,
 				cacheRead: 0,
 				cacheWrite: 0,
 			},
-			contextWindow: 204800,
-			maxTokens: 131072,
+			contextWindow: 202752,
+			maxTokens: 4096,
 		} satisfies Model<"openai-completions">,
 		"anthropic/claude-sonnet-4.5": {
 			id: "anthropic/claude-sonnet-4.5",

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,15 @@
 
 ## [Unreleased]
 
+### Changed
+
+- Editor: updated keyboard shortcuts to follow Unix conventions:
+  - **Ctrl+W** deletes the previous word (stopping at whitespace or punctuation)
+  - **Ctrl+U** deletes from cursor to start of line (at line start, merges with previous line)
+  - **Ctrl+K** deletes from cursor to end of line (at line end, merges with next line)
+  - **Option+Backspace** in Ghostty now behaves like **Ctrl+W** (delete word backwards)
+  - **Cmd+Backspace** in Ghostty now behaves like **Ctrl+U** (delete to start of line)
+
 ## [0.7.8] - 2025-11-13
 
 ### Changed

packages/coding-agent/README.md

@@ -131,7 +131,11 @@ Paste multiple lines of text (e.g., code snippets, logs) and they'll be automati
 
 ### Keyboard Shortcuts
 
-- **Ctrl+K**: Delete current line
+- **Ctrl+W**: Delete word backwards (stops at whitespace or punctuation)
+- **Option+Backspace** (Ghostty): Delete word backwards (same as Ctrl+W)
+- **Ctrl+U**: Delete to start of line (at line start: merge with previous line)
+- **Cmd+Backspace** (Ghostty): Delete to start of line (same as Ctrl+U)
+- **Ctrl+K**: Delete to end of line (at line end: merge with next line)
 - **Ctrl+C**: Clear editor (first press) / Exit pi (second press)
 - **Tab**: Path completion
 - **Enter**: Send message

packages/tui/src/components/editor.ts

@@ -231,9 +231,21 @@ export class Editor implements Component {
 		}
 
 		// Continue with rest of input handling
-		// Ctrl+K - Delete current line
+		// Ctrl+K - Delete to end of line
 		if (data.charCodeAt(0) === 11) {
-			this.deleteCurrentLine();
+			this.deleteToEndOfLine();
+		}
+		// Ctrl+U - Delete to start of line
+		else if (data.charCodeAt(0) === 21) {
+			this.deleteToStartOfLine();
+		}
+		// Ctrl+W - Delete word backwards
+		else if (data.charCodeAt(0) === 23) {
+			this.deleteWordBackwards();
+		}
+		// Option/Alt+Backspace (e.g. Ghostty sends ESC + DEL)
+		else if (data === "\x1b\x7f") {
+			this.deleteWordBackwards();
 		}
 		// Ctrl+A - Move to start of line
 		else if (data.charCodeAt(0) === 1) {
@@ -598,6 +610,93 @@ export class Editor implements Component {
 		this.state.cursorCol = currentLine.length;
 	}
 
+	private deleteToStartOfLine(): void {
+		const currentLine = this.state.lines[this.state.cursorLine] || "";
+
+		if (this.state.cursorCol > 0) {
+			// Delete from start of line up to cursor
+			this.state.lines[this.state.cursorLine] = currentLine.slice(this.state.cursorCol);
+			this.state.cursorCol = 0;
+		} else if (this.state.cursorLine > 0) {
+			// At start of line - merge with previous line
+			const previousLine = this.state.lines[this.state.cursorLine - 1] || "";
+			this.state.lines[this.state.cursorLine - 1] = previousLine + currentLine;
+			this.state.lines.splice(this.state.cursorLine, 1);
+			this.state.cursorLine--;
+			this.state.cursorCol = previousLine.length;
+		}
+
+		if (this.onChange) {
+			this.onChange(this.getText());
+		}
+	}
+
+	private deleteToEndOfLine(): void {
+		const currentLine = this.state.lines[this.state.cursorLine] || "";
+
+		if (this.state.cursorCol < currentLine.length) {
+			// Delete from cursor to end of line
+			this.state.lines[this.state.cursorLine] = currentLine.slice(0, this.state.cursorCol);
+		} else if (this.state.cursorLine < this.state.lines.length - 1) {
+			// At end of line - merge with next line
+			const nextLine = this.state.lines[this.state.cursorLine + 1] || "";
+			this.state.lines[this.state.cursorLine] = currentLine + nextLine;
+			this.state.lines.splice(this.state.cursorLine + 1, 1);
+		}
+
+		if (this.onChange) {
+			this.onChange(this.getText());
+		}
+	}
+
+	private deleteWordBackwards(): void {
+		const currentLine = this.state.lines[this.state.cursorLine] || "";
+
+		// If at start of line, behave like backspace at column 0 (merge with previous line)
+		if (this.state.cursorCol === 0) {
+			if (this.state.cursorLine > 0) {
+				const previousLine = this.state.lines[this.state.cursorLine - 1] || "";
+				this.state.lines[this.state.cursorLine - 1] = previousLine + currentLine;
+				this.state.lines.splice(this.state.cursorLine, 1);
+				this.state.cursorLine--;
+				this.state.cursorCol = previousLine.length;
+			}
+		} else {
+			const textBeforeCursor = currentLine.slice(0, this.state.cursorCol);
+
+			const isWhitespace = (char: string): boolean => /\s/.test(char);
+			const isPunctuation = (char: string): boolean => {
+				// Treat obvious code punctuation as boundaries
+				return /[(){}[\]<>.,;:'"!?+\-=*/\\|&%^$#@~`]/.test(char);
+			};
+
+			let deleteFrom = this.state.cursorCol;
+			const lastChar = textBeforeCursor[deleteFrom - 1] ?? "";
+
+			// If immediately on whitespace or punctuation, delete that single boundary char
+			if (isWhitespace(lastChar) || isPunctuation(lastChar)) {
+				deleteFrom -= 1;
+			} else {
+				// Otherwise, delete a run of non-boundary characters (the "word")
+				while (deleteFrom > 0) {
+					const ch = textBeforeCursor[deleteFrom - 1] ?? "";
+					if (isWhitespace(ch) || isPunctuation(ch)) {
+						break;
+					}
+					deleteFrom -= 1;
+				}
+			}
+
+			this.state.lines[this.state.cursorLine] =
+				currentLine.slice(0, deleteFrom) + currentLine.slice(this.state.cursorCol);
+			this.state.cursorCol = deleteFrom;
+		}
+
+		if (this.onChange) {
+			this.onChange(this.getText());
+		}
+	}
+
 	private handleForwardDelete(): void {
 		const currentLine = this.state.lines[this.state.cursorLine] || "";
 
@@ -618,31 +717,6 @@ export class Editor implements Component {
 		}
 	}
 
-	private deleteCurrentLine(): void {
-		if (this.state.lines.length === 1) {
-			// Only one line - just clear it
-			this.state.lines[0] = "";
-			this.state.cursorCol = 0;
-		} else {
-			// Multiple lines - remove current line
-			this.state.lines.splice(this.state.cursorLine, 1);
-
-			// Adjust cursor position
-			if (this.state.cursorLine >= this.state.lines.length) {
-				// Was on last line, move to new last line
-				this.state.cursorLine = this.state.lines.length - 1;
-			}
-
-			// Clamp cursor column to new line length
-			const newLine = this.state.lines[this.state.cursorLine] || "";
-			this.state.cursorCol = Math.min(this.state.cursorCol, newLine.length);
-		}
-
-		if (this.onChange) {
-			this.onChange(this.getText());
-		}
-	}
-
 	private moveCursor(deltaLine: number, deltaCol: number): void {
 		if (deltaLine !== 0) {
 			const newLine = this.state.cursorLine + deltaLine;

packages/tui/test/key-tester.ts

@@ -0,0 +1,91 @@
+#!/usr/bin/env node
+import { ProcessTerminal } from "../src/terminal.js";
+import { type Component, TUI } from "../src/tui.js";
+
+/**
+ * Simple key code logger component
+ */
+class KeyLogger implements Component {
+	private log: string[] = [];
+	private maxLines = 20;
+	private tui: TUI;
+
+	constructor(tui: TUI) {
+		this.tui = tui;
+	}
+
+	handleInput(data: string): void {
+		// Convert to various representations
+		const hex = Buffer.from(data).toString("hex");
+		const charCodes = Array.from(data)
+			.map((c) => c.charCodeAt(0))
+			.join(", ");
+		const repr = data
+			.replace(/\x1b/g, "\\x1b")
+			.replace(/\r/g, "\\r")
+			.replace(/\n/g, "\\n")
+			.replace(/\t/g, "\\t")
+			.replace(/\x7f/g, "\\x7f");
+
+		const logLine = `Hex: ${hex.padEnd(20)} | Chars: [${charCodes.padEnd(15)}] | Repr: "${repr}"`;
+
+		this.log.push(logLine);
+
+		// Keep only last N lines
+		if (this.log.length > this.maxLines) {
+			this.log.shift();
+		}
+
+		// Request re-render to show the new log entry
+		this.tui.requestRender();
+	}
+
+	render(width: number): string[] {
+		const lines: string[] = [];
+
+		// Title
+		lines.push("=".repeat(width));
+		lines.push("Key Code Tester - Press keys to see their codes (Ctrl+C to exit)".padEnd(width));
+		lines.push("=".repeat(width));
+		lines.push("");
+
+		// Log entries
+		for (const entry of this.log) {
+			lines.push(entry.padEnd(width));
+		}
+
+		// Fill remaining space
+		const remaining = Math.max(0, 25 - lines.length);
+		for (let i = 0; i < remaining; i++) {
+			lines.push("".padEnd(width));
+		}
+
+		// Footer
+		lines.push("=".repeat(width));
+		lines.push("Test these:".padEnd(width));
+		lines.push("  - Option/Alt + Backspace".padEnd(width));
+		lines.push("  - Cmd/Ctrl + Backspace".padEnd(width));
+		lines.push("  - Regular Backspace".padEnd(width));
+		lines.push("=".repeat(width));
+
+		return lines;
+	}
+}
+
+// Set up TUI
+const terminal = new ProcessTerminal();
+const tui = new TUI(terminal);
+const logger = new KeyLogger(tui);
+
+tui.addChild(logger);
+tui.setFocus(logger);
+
+// Handle Ctrl+C for clean exit
+process.on("SIGINT", () => {
+	tui.stop();
+	console.log("\nExiting...");
+	process.exit(0);
+});
+
+// Start the TUI
+tui.start();