Add settings manager, show changelog on startup if not shown yet.

packages/coding-agent/CHANGELOG.md

@@ -0,0 +1,15 @@
+# Changelog
+
+## [0.7.7] - Unreleased
+
+### Added
+
+- Automatic changelog viewer on startup in interactive mode. When starting a new session (not continuing/resuming), the agent will display all changelog entries since the last version you used in a scrollable markdown viewer. The last shown version is tracked in `~/.pi/agent/settings.json`.
+
+### Changed
+
+- **BREAKING**: Renamed project context file from `AGENT.md` to `AGENTS.md`. The system now looks for `AGENTS.md` or `CLAUDE.md` (with `AGENTS.md` preferred). Existing `AGENT.md` files will need to be renamed to `AGENTS.md` to continue working. (fixes [#9](https://github.com/badlogic/pi-mono/pull/9))
+
+## [0.7.6] - 2025-11-13
+
+Previous releases did not maintain a changelog.

packages/coding-agent/README.md

@@ -134,26 +134,26 @@ Paste multiple lines of text (e.g., code snippets, logs) and they'll be automati
 
 ## Project Context Files
 
-The agent automatically loads context from `AGENT.md` or `CLAUDE.md` files at the start of new sessions (not when continuing/resuming). These files are loaded in hierarchical order to support both global preferences and monorepo structures.
+The agent automatically loads context from `AGENTS.md` or `CLAUDE.md` files at the start of new sessions (not when continuing/resuming). These files are loaded in hierarchical order to support both global preferences and monorepo structures.
 
 ### File Locations
 
 Context files are loaded in this order:
 
-1. **Global context**: `~/.pi/agent/AGENT.md` or `CLAUDE.md`
+1. **Global context**: `~/.pi/agent/AGENTS.md` or `CLAUDE.md`
    - Applies to all your coding sessions
    - Great for personal coding preferences and workflows
 
 2. **Parent directories** (top-most first down to current directory)
    - Walks up from current directory to filesystem root
-   - Each directory can have its own `AGENT.md` or `CLAUDE.md`
+   - Each directory can have its own `AGENTS.md` or `CLAUDE.md`
    - Perfect for monorepos with shared context at higher levels
 
-3. **Current directory**: Your project's `AGENT.md` or `CLAUDE.md`
+3. **Current directory**: Your project's `AGENTS.md` or `CLAUDE.md`
    - Most specific context, loaded last
    - Overwrites or extends parent/global context
 
-**File preference**: In each directory, `AGENT.md` is preferred over `CLAUDE.md` if both exist.
+**File preference**: In each directory, `AGENTS.md` is preferred over `CLAUDE.md` if both exist.
 
 ### What to Include
 
@@ -364,9 +364,9 @@ You: Read ~/agent-tools/screenshot/README.md and use that tool to take a screens
 
 The agent will read the README, understand the tool, and invoke it via bash as needed. If you need a new tool, ask the agent to write it for you.
 
-You can also reference tool READMEs in your `AGENT.md` files to make them automatically available:
-- Global: `~/.pi/agent/AGENT.md` - available in all sessions
-- Project-specific: `./AGENT.md` - available in this project
+You can also reference tool READMEs in your `AGENTS.md` files to make them automatically available:
+- Global: `~/.pi/agent/AGENTS.md` - available in all sessions
+- Project-specific: `./AGENTS.md` - available in this project
 
 **Real-world example:**
 

packages/coding-agent/package.json

@@ -9,7 +9,8 @@
 	"main": "./dist/index.js",
 	"types": "./dist/index.d.ts",
 	"files": [
-		"dist"
+		"dist",
+		"CHANGELOG.md"
 	],
 	"scripts": {
 		"clean": "rm -rf dist",

packages/coding-agent/src/changelog.ts

@@ -0,0 +1,107 @@
+import { existsSync, readFileSync } from "fs";
+import { dirname, join } from "path";
+import { fileURLToPath } from "url";
+
+export interface ChangelogEntry {
+	major: number;
+	minor: number;
+	patch: number;
+	content: string;
+}
+
+/**
+ * Parse changelog entries from CHANGELOG.md
+ * Scans for ## lines and collects content until next ## or EOF
+ */
+export function parseChangelog(changelogPath: string): ChangelogEntry[] {
+	if (!existsSync(changelogPath)) {
+		return [];
+	}
+
+	try {
+		const content = readFileSync(changelogPath, "utf-8");
+		const lines = content.split("\n");
+		const entries: ChangelogEntry[] = [];
+
+		let currentLines: string[] = [];
+		let currentVersion: { major: number; minor: number; patch: number } | null = null;
+
+		for (const line of lines) {
+			// Check if this is a version header (## [x.y.z] ...)
+			if (line.startsWith("## ")) {
+				// Save previous entry if exists
+				if (currentVersion && currentLines.length > 0) {
+					entries.push({
+						...currentVersion,
+						content: currentLines.join("\n").trim(),
+					});
+				}
+
+				// Try to parse version from this line
+				const versionMatch = line.match(/##\s+\[?(\d+)\.(\d+)\.(\d+)\]?/);
+				if (versionMatch) {
+					currentVersion = {
+						major: Number.parseInt(versionMatch[1], 10),
+						minor: Number.parseInt(versionMatch[2], 10),
+						patch: Number.parseInt(versionMatch[3], 10),
+					};
+					currentLines = [line];
+				} else {
+					// Reset if we can't parse version
+					currentVersion = null;
+					currentLines = [];
+				}
+			} else if (currentVersion) {
+				// Collect lines for current version
+				currentLines.push(line);
+			}
+		}
+
+		// Save last entry
+		if (currentVersion && currentLines.length > 0) {
+			entries.push({
+				...currentVersion,
+				content: currentLines.join("\n").trim(),
+			});
+		}
+
+		return entries;
+	} catch (error) {
+		console.error(`Warning: Could not parse changelog: ${error}`);
+		return [];
+	}
+}
+
+/**
+ * Compare versions. Returns: -1 if v1 < v2, 0 if v1 === v2, 1 if v1 > v2
+ */
+export function compareVersions(v1: ChangelogEntry, v2: ChangelogEntry): number {
+	if (v1.major !== v2.major) return v1.major - v2.major;
+	if (v1.minor !== v2.minor) return v1.minor - v2.minor;
+	return v1.patch - v2.patch;
+}
+
+/**
+ * Get entries newer than lastVersion
+ */
+export function getNewEntries(entries: ChangelogEntry[], lastVersion: string): ChangelogEntry[] {
+	// Parse lastVersion
+	const parts = lastVersion.split(".").map(Number);
+	const last: ChangelogEntry = {
+		major: parts[0] || 0,
+		minor: parts[1] || 0,
+		patch: parts[2] || 0,
+		content: "",
+	};
+
+	return entries.filter((entry) => compareVersions(entry, last) > 0);
+}
+
+/**
+ * Get the path to the CHANGELOG.md file
+ */
+export function getChangelogPath(): string {
+	const __filename = fileURLToPath(import.meta.url);
+	const __dirname = dirname(__filename);
+	return join(__dirname, "../CHANGELOG.md");
+}

packages/coding-agent/src/main.ts

@@ -6,7 +6,9 @@ import { existsSync, readFileSync } from "fs";
 import { homedir } from "os";
 import { dirname, join, resolve } from "path";
 import { fileURLToPath } from "url";
+import { getChangelogPath, getNewEntries, parseChangelog } from "./changelog.js";
 import { SessionManager } from "./session-manager.js";
+import { SettingsManager } from "./settings-manager.js";
 import { codingTools } from "./tools/index.js";
 import { SessionSelectorComponent } from "./tui/session-selector.js";
 import { TuiRenderer } from "./tui/tui-renderer.js";
@@ -221,10 +223,10 @@ Guidelines:
 }
 
 /**
- * Look for AGENT.md or CLAUDE.md in a directory (prefers AGENT.md)
+ * Look for AGENTS.md or CLAUDE.md in a directory (prefers AGENTS.md)
  */
 function loadContextFileFromDir(dir: string): { path: string; content: string } | null {
-	const candidates = ["AGENT.md", "CLAUDE.md"];
+	const candidates = ["AGENTS.md", "CLAUDE.md"];
 	for (const filename of candidates) {
 		const filePath = join(dir, filename);
 		if (existsSync(filePath)) {
@@ -243,7 +245,7 @@ function loadContextFileFromDir(dir: string): { path: string; content: string }
 
 /**
  * Load all project context files in order:
- * 1. Global: ~/.pi/agent/AGENT.md or CLAUDE.md
+ * 1. Global: ~/.pi/agent/AGENTS.md or CLAUDE.md
  * 2. Parent directories (top-most first) down to cwd
  * Each returns {path, content} for separate messages
  */
@@ -316,8 +318,13 @@ async function selectSession(sessionManager: SessionManager): Promise<string | n
 	});
 }
 
-async function runInteractiveMode(agent: Agent, sessionManager: SessionManager, version: string): Promise<void> {
-	const renderer = new TuiRenderer(agent, sessionManager, version);
+async function runInteractiveMode(
+	agent: Agent,
+	sessionManager: SessionManager,
+	version: string,
+	changelogMarkdown: string | null = null,
+): Promise<void> {
+	const renderer = new TuiRenderer(agent, sessionManager, version, changelogMarkdown);
 
 	// Initialize TUI
 	await renderer.init();
@@ -581,8 +588,38 @@ export async function main(args: string[]) {
 		// RPC mode - headless operation
 		await runRpcMode(agent, sessionManager);
 	} else if (isInteractive) {
+		// Check if we should show changelog (only in interactive mode, only for new sessions)
+		let changelogMarkdown: string | null = null;
+		if (!parsed.continue && !parsed.resume) {
+			const settingsManager = new SettingsManager();
+			const lastVersion = settingsManager.getLastChangelogVersion();
+
+			// Check if we need to show changelog
+			if (!lastVersion) {
+				// First run - show all entries
+				const changelogPath = getChangelogPath();
+				const entries = parseChangelog(changelogPath);
+				if (entries.length > 0) {
+					changelogMarkdown = entries.map((e) => e.content).join("\n\n");
+					settingsManager.setLastChangelogVersion(VERSION);
+				}
+			} else {
+				// Parse current and last versions
+				const currentParts = VERSION.split(".").map(Number);
+				const current = { major: currentParts[0] || 0, minor: currentParts[1] || 0, patch: currentParts[2] || 0 };
+				const changelogPath = getChangelogPath();
+				const entries = parseChangelog(changelogPath);
+				const newEntries = getNewEntries(entries, lastVersion);
+
+				if (newEntries.length > 0) {
+					changelogMarkdown = newEntries.map((e) => e.content).join("\n\n");
+					settingsManager.setLastChangelogVersion(VERSION);
+				}
+			}
+		}
+
 		// No messages and not RPC - use TUI
-		await runInteractiveMode(agent, sessionManager, VERSION);
+		await runInteractiveMode(agent, sessionManager, VERSION, changelogMarkdown);
 	} else {
 		// CLI mode with messages
 		await runSingleShotMode(agent, sessionManager, parsed.messages, mode);

packages/coding-agent/src/settings-manager.ts

@@ -0,0 +1,55 @@
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from "fs";
+import { homedir } from "os";
+import { dirname, join } from "path";
+
+export interface Settings {
+	lastChangelogVersion?: string;
+}
+
+export class SettingsManager {
+	private settingsPath: string;
+	private settings: Settings;
+
+	constructor(baseDir?: string) {
+		const dir = baseDir || join(homedir(), ".pi", "agent");
+		this.settingsPath = join(dir, "settings.json");
+		this.settings = this.load();
+	}
+
+	private load(): Settings {
+		if (!existsSync(this.settingsPath)) {
+			return {};
+		}
+
+		try {
+			const content = readFileSync(this.settingsPath, "utf-8");
+			return JSON.parse(content);
+		} catch (error) {
+			console.error(`Warning: Could not read settings file: ${error}`);
+			return {};
+		}
+	}
+
+	private save(): void {
+		try {
+			// Ensure directory exists
+			const dir = dirname(this.settingsPath);
+			if (!existsSync(dir)) {
+				mkdirSync(dir, { recursive: true });
+			}
+
+			writeFileSync(this.settingsPath, JSON.stringify(this.settings, null, 2), "utf-8");
+		} catch (error) {
+			console.error(`Warning: Could not save settings file: ${error}`);
+		}
+	}
+
+	getLastChangelogVersion(): string | undefined {
+		return this.settings.lastChangelogVersion;
+	}
+
+	setLastChangelogVersion(version: string): void {
+		this.settings.lastChangelogVersion = version;
+		this.save();
+	}
+}

packages/coding-agent/src/tui/dynamic-border.ts

@@ -0,0 +1,17 @@
+import type { Component } from "@mariozechner/pi-tui";
+import chalk from "chalk";
+
+/**
+ * Dynamic border component that adjusts to viewport width
+ */
+export class DynamicBorder implements Component {
+	private color: (str: string) => string;
+
+	constructor(color: (str: string) => string = chalk.blue) {
+		this.color = color;
+	}
+
+	render(width: number): string[] {
+		return [this.color("─".repeat(Math.max(1, width)))];
+	}
+}

packages/coding-agent/src/tui/tui-renderer.ts

@@ -5,6 +5,7 @@ import {
 	CombinedAutocompleteProvider,
 	Container,
 	Loader,
+	Markdown,
 	ProcessTerminal,
 	Spacer,
 	Text,
@@ -15,6 +16,7 @@ import { exportSessionToHtml } from "../export-html.js";
 import type { SessionManager } from "../session-manager.js";
 import { AssistantMessageComponent } from "./assistant-message.js";
 import { CustomEditor } from "./custom-editor.js";
+import { DynamicBorder } from "./dynamic-border.js";
 import { FooterComponent } from "./footer.js";
 import { ModelSelectorComponent } from "./model-selector.js";
 import { ThinkingSelectorComponent } from "./thinking-selector.js";
@@ -39,6 +41,7 @@ export class TuiRenderer {
 	private loadingAnimation: Loader | null = null;
 	private onInterruptCallback?: () => void;
 	private lastSigintTime = 0;
+	private changelogMarkdown: string | null = null;
 
 	// Streaming message tracking
 	private streamingComponent: AssistantMessageComponent | null = null;
@@ -55,10 +58,11 @@ export class TuiRenderer {
 	// Track if this is the first user message (to skip spacer)
 	private isFirstUserMessage = true;
 
-	constructor(agent: Agent, sessionManager: SessionManager, version: string) {
+	constructor(agent: Agent, sessionManager: SessionManager, version: string, changelogMarkdown: string | null = null) {
 		this.agent = agent;
 		this.sessionManager = sessionManager;
 		this.version = version;
+		this.changelogMarkdown = changelogMarkdown;
 		this.ui = new TUI(new ProcessTerminal());
 		this.chatContainer = new Container();
 		this.statusContainer = new Container();
@@ -125,6 +129,18 @@ export class TuiRenderer {
 		this.ui.addChild(new Spacer(1));
 		this.ui.addChild(header);
 		this.ui.addChild(new Spacer(1));
+
+		// Add changelog if provided
+		if (this.changelogMarkdown) {
+			this.ui.addChild(new DynamicBorder(chalk.cyan));
+			this.ui.addChild(new Text(chalk.bold.cyan("What's New"), 1, 0));
+			this.ui.addChild(new Spacer(1));
+			this.ui.addChild(new Markdown(this.changelogMarkdown.trim(), undefined, undefined, undefined, 1, 0));
+			this.ui.addChild(new Spacer(1));
+			this.ui.addChild(new DynamicBorder(chalk.cyan));
+			this.ui.addChild(new Spacer(1));
+		}
+
 		this.ui.addChild(this.chatContainer);
 		this.ui.addChild(this.statusContainer);
 		this.ui.addChild(new Spacer(1));