fix(coding-agent): route remaining hardcoded pi branding through APP_NAME (#3583)

Swaps hardcoded "pi" / ".pi" / "π" for the existing APP_NAME and
CONFIG_DIR_NAME extension points at four sites the original APP_NAME
rollout missed:

- /quit slash-command description
- process.title (cli.ts and bun/cli.ts)
- project-local extensions dir in loader.ts

For the terminal title, adds an APP_TITLE export in config.ts that
keeps pi's "π" glyph when piConfig.name is unset and falls back to
APP_NAME otherwise. Presence of piConfig.name acts as the "has been
rebranded" signal, so pi's own package.json drops the redundant
"name": "pi" (the existing `|| "pi"` fallback in config.ts makes this
a no-op for APP_NAME).

No behavior change for pi itself: process.title, /quit description,
terminal title prefix, and project-local extensions dir all resolve
to the same values as before.

closes #3476

packages/coding-agent/package.json

@@ -4,7 +4,6 @@
 	"description": "Coding agent CLI with read, bash, edit, write tools and session management",
 	"type": "module",
 	"piConfig": {
-		"name": "pi",
 		"configDir": ".pi"
 	},
 	"bin": {

packages/coding-agent/src/bun/cli.ts

@@ -1,5 +1,7 @@
 #!/usr/bin/env node
-process.title = "pi";
+import { APP_NAME } from "../config.js";
+
+process.title = APP_NAME;
 process.emitWarning = (() => {}) as typeof process.emitWarning;
 
 await import("./register-bedrock.js");

packages/coding-agent/src/cli.ts

@@ -5,13 +5,14 @@
  *
  * Test with: npx tsx src/cli-new.ts [args...]
  */
-process.title = "pi";
+import { EnvHttpProxyAgent, setGlobalDispatcher } from "undici";
+import { APP_NAME } from "./config.js";
+import { main } from "./main.js";
+
+process.title = APP_NAME;
 process.env.PI_CODING_AGENT = "true";
 process.emitWarning = (() => {}) as typeof process.emitWarning;
 
-import { EnvHttpProxyAgent, setGlobalDispatcher } from "undici";
-import { main } from "./main.js";
-
 setGlobalDispatcher(new EnvHttpProxyAgent());
 
 main(process.argv.slice(2));

packages/coding-agent/src/config.ts

@@ -184,7 +184,9 @@ export function getBundledInteractiveAssetPath(name: string): string {
 
 const pkg = JSON.parse(readFileSync(getPackageJsonPath(), "utf-8"));
 
-export const APP_NAME: string = pkg.piConfig?.name || "pi";
+const piConfigName: string | undefined = pkg.piConfig?.name;
+export const APP_NAME: string = piConfigName || "pi";
+export const APP_TITLE: string = piConfigName ? APP_NAME : "π";
 export const CONFIG_DIR_NAME: string = pkg.piConfig?.configDir || ".pi";
 export const VERSION: string = pkg.version;
 

packages/coding-agent/src/core/extensions/loader.ts

@@ -21,7 +21,7 @@ import * as _bundledPiTui from "@mariozechner/pi-tui";
 import * as _bundledTypebox from "typebox";
 import * as _bundledTypeboxCompile from "typebox/compile";
 import * as _bundledTypeboxValue from "typebox/value";
-import { getAgentDir, isBunBinary } from "../../config.js";
+import { CONFIG_DIR_NAME, getAgentDir, isBunBinary } from "../../config.js";
 // NOTE: This import works because loader.ts exports are NOT re-exported from index.ts,
 // avoiding a circular dependency. Extensions can import from @mariozechner/pi-coding-agent.
 import * as _bundledPiCodingAgent from "../../index.js";
@@ -576,8 +576,8 @@ export async function discoverAndLoadExtensions(
 		}
 	};
 
-	// 1. Project-local extensions: cwd/.pi/extensions/
-	const localExtDir = path.join(cwd, ".pi", "extensions");
+	// 1. Project-local extensions: cwd/${CONFIG_DIR_NAME}/extensions/
+	const localExtDir = path.join(cwd, CONFIG_DIR_NAME, "extensions");
 	addPaths(discoverExtensionsInDir(localExtDir));
 
 	// 2. Global extensions: agentDir/extensions/

packages/coding-agent/src/core/slash-commands.ts

@@ -1,3 +1,4 @@
+import { APP_NAME } from "../config.js";
 import type { SourceInfo } from "./source-info.js";
 
 export type SlashCommandSource = "extension" | "prompt" | "skill";
@@ -35,5 +36,5 @@ export const BUILTIN_SLASH_COMMANDS: ReadonlyArray<BuiltinSlashCommand> = [
 	{ name: "compact", description: "Manually compact the session context" },
 	{ name: "resume", description: "Resume a different session" },
 	{ name: "reload", description: "Reload keybindings, extensions, skills, prompts, and themes" },
-	{ name: "quit", description: "Quit pi" },
+	{ name: "quit", description: `Quit ${APP_NAME}` },
 ];

packages/coding-agent/src/modes/interactive/interactive-mode.ts

@@ -41,6 +41,7 @@ import {
 import { spawn, spawnSync } from "child_process";
 import {
 	APP_NAME,
+	APP_TITLE,
 	getAgentDir,
 	getAuthPath,
 	getDebugLogPath,
@@ -637,9 +638,9 @@ export class InteractiveMode {
 		const cwdBasename = path.basename(this.sessionManager.getCwd());
 		const sessionName = this.sessionManager.getSessionName();
 		if (sessionName) {
-			this.ui.terminal.setTitle(`π - ${sessionName} - ${cwdBasename}`);
+			this.ui.terminal.setTitle(`${APP_TITLE} - ${sessionName} - ${cwdBasename}`);
 		} else {
-			this.ui.terminal.setTitle(`π - ${cwdBasename}`);
+			this.ui.terminal.setTitle(`${APP_TITLE} - ${cwdBasename}`);
 		}
 	}