diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a14702c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,34 @@
+# dependencies (bun install)
+node_modules
+
+# output
+out
+dist
+*.tgz
+
+# code coverage
+coverage
+*.lcov
+
+# logs
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# caches
+.eslintcache
+.cache
+*.tsbuildinfo
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store
diff --git a/README.md b/README.md
index 318f15a..77010a0 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,36 @@
 # hermes-harness
 
-Hermes Agent CLI harness tools — personality management, scheduling, and more
\ No newline at end of file
+Hermes Agent CLI harness tools — personality management, scheduling, and more.
+
+## Install
+
+```bash
+bun install
+bun link
+```
+
+## Usage
+
+```bash
+# List all personalities
+hermes-har personality list
+
+# Show personality details
+hermes-har personality show 日常团子
+
+# Add a personality
+hermes-har personality add "测试人格" "你是一个测试用的人格..."
+
+# Remove a personality
+hermes-har personality remove "测试人格"
+
+# Switch personality (local config only)
+hermes-har personality switch 日常团子
+
+# Switch personality via Telegram (live session update)
+hermes-har personality switch 娇媚团子 --tg
+```
+
+## License
+
+MIT
diff --git a/bun.lock b/bun.lock
new file mode 100644
index 0000000..6c70845
--- /dev/null
+++ b/bun.lock
@@ -0,0 +1,29 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "hermes-harness",
+      "dependencies": {
+        "yaml": "^2.8.3",
+      },
+      "devDependencies": {
+        "@types/bun": "latest",
+        "typescript": "^5.9.0",
+      },
+    },
+  },
+  "packages": {
+    "@types/bun": ["@types/bun@1.3.12", "", { "dependencies": { "bun-types": "1.3.12" } }, "sha512-DBv81elK+/VSwXHDlnH3Qduw+KxkTIWi7TXkAeh24zpi5l0B2kUg9Ga3tb4nJaPcOFswflgi/yAvMVBPrxMB+A=="],
+
+    "@types/node": ["@types/node@25.6.0", "", { "dependencies": { "undici-types": "~7.19.0" } }, "sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ=="],
+
+    "bun-types": ["bun-types@1.3.12", "", { "dependencies": { "@types/node": "*" } }, "sha512-HqOLj5PoFajAQciOMRiIZGNoKxDJSr6qigAttOX40vJuSp6DN/CxWp9s3C1Xwm4oH7ybueITwiaOcWXoYVoRkA=="],
+
+    "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
+
+    "undici-types": ["undici-types@7.19.2", "", {}, "sha512-qYVnV5OEm2AW8cJMCpdV20CDyaN3g0AjDlOGf1OW4iaDEx8MwdtChUp4zu4H0VP3nDRF/8RKWH+IPp9uW0YGZg=="],
+
+    "yaml": ["yaml@2.8.3", "", { "bin": { "yaml": "bin.mjs" } }, "sha512-AvbaCLOO2Otw/lW5bmh9d/WEdcDFdQp2Z2ZUH3pX9U2ihyUY0nvLv7J6TrWowklRGPYbB/IuIMfYgxaCPg5Bpg=="],
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..9f4aab1
--- /dev/null
+++ b/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "hermes-harness",
+  "version": "0.1.0",
+  "description": "Hermes Agent CLI harness tools",
+  "type": "module",
+  "bin": {
+    "hermes-har": "./src/cli.ts"
+  },
+  "scripts": {
+    "dev": "bun run src/cli.ts"
+  },
+  "dependencies": {
+    "yaml": "^2.8.3"
+  },
+  "devDependencies": {
+    "@types/bun": "latest",
+    "typescript": "^5.9.0"
+  }
+}
diff --git a/src/cli.ts b/src/cli.ts
new file mode 100644
index 0000000..97bee0f
--- /dev/null
+++ b/src/cli.ts
@@ -0,0 +1,37 @@
+#!/usr/bin/env bun
+
+import { personality } from "./commands/personality";
+
+const COMMANDS: Record<string, (args: string[]) => Promise<void>> = {
+  personality,
+};
+
+async function main() {
+  const [command, ...args] = process.argv.slice(2);
+
+  if (!command || command === "help" || command === "--help") {
+    console.log(`hermes-har — Hermes Agent CLI harness tools
+
+Usage: hermes-har <command> [options]
+
+Commands:
+  personality   Manage personality presets (list/add/remove/switch)
+
+Run 'hermes-har <command> --help' for details.`);
+    process.exit(0);
+  }
+
+  const handler = COMMANDS[command];
+  if (!handler) {
+    console.error(`Unknown command: ${command}`);
+    console.error(`Run 'hermes-har help' for available commands.`);
+    process.exit(1);
+  }
+
+  await handler(args);
+}
+
+main().catch((err) => {
+  console.error(err.message);
+  process.exit(1);
+});
diff --git a/src/commands/personality.ts b/src/commands/personality.ts
new file mode 100644
index 0000000..ad5f02b
--- /dev/null
+++ b/src/commands/personality.ts
@@ -0,0 +1,273 @@
+import { readFileSync, writeFileSync, existsSync } from "fs";
+import { homedir } from "os";
+import { join } from "path";
+import { parse, stringify } from "yaml";
+
+const CONFIG_PATH = join(homedir(), ".hermes", "config.yaml");
+
+interface Config {
+  agent?: {
+    personalities?: Record<string, string | PersonalityDict>;
+    system_prompt?: string;
+    [key: string]: unknown;
+  };
+  [key: string]: unknown;
+}
+
+interface PersonalityDict {
+  description?: string;
+  system_prompt?: string;
+  tone?: string;
+  style?: string;
+}
+
+function loadConfig(): Config {
+  if (!existsSync(CONFIG_PATH)) {
+    throw new Error(`Config not found: ${CONFIG_PATH}`);
+  }
+  return parse(readFileSync(CONFIG_PATH, "utf-8")) || {};
+}
+
+function saveConfig(config: Config) {
+  writeFileSync(CONFIG_PATH, stringify(config, { lineWidth: 120 }), "utf-8");
+}
+
+function getPersonalities(config: Config): Record<string, string | PersonalityDict> {
+  return config?.agent?.personalities || {};
+}
+
+function resolvePrompt(value: string | PersonalityDict): string {
+  if (typeof value === "string") return value;
+  const parts = [value.system_prompt || ""];
+  if (value.tone) parts.push(`Tone: ${value.tone}`);
+  if (value.style) parts.push(`Style: ${value.style}`);
+  return parts.filter(Boolean).join("\n");
+}
+
+function getPreview(value: string | PersonalityDict): string {
+  if (typeof value === "string") {
+    return value.length > 60 ? value.slice(0, 60) + "..." : value;
+  }
+  return value.description || (value.system_prompt || "").slice(0, 60) + "...";
+}
+
+// --- Actions ---
+
+function list() {
+  const config = loadConfig();
+  const personalities = getPersonalities(config);
+  const names = Object.keys(personalities);
+
+  if (names.length === 0) {
+    console.log("No personalities configured.");
+    return;
+  }
+
+  console.log("Available personalities:\n");
+  for (const name of names) {
+    console.log(`  ${name} — ${getPreview(personalities[name])}`);
+  }
+  console.log(`\nTotal: ${names.length}`);
+}
+
+function show(name: string) {
+  const config = loadConfig();
+  const personalities = getPersonalities(config);
+
+  if (!(name in personalities)) {
+    console.error(`Personality not found: ${name}`);
+    console.error(`Available: ${Object.keys(personalities).join(", ")}`);
+    process.exit(1);
+  }
+
+  const value = personalities[name];
+  console.log(`[${name}]\n`);
+  if (typeof value === "string") {
+    console.log(value);
+  } else {
+    if (value.description) console.log(`Description: ${value.description}`);
+    if (value.system_prompt) console.log(`\n${value.system_prompt}`);
+    if (value.tone) console.log(`\nTone: ${value.tone}`);
+    if (value.style) console.log(`Style: ${value.style}`);
+  }
+}
+
+function add(name: string, prompt: string) {
+  const config = loadConfig();
+  if (!config.agent) config.agent = {};
+  if (!config.agent.personalities) config.agent.personalities = {};
+
+  const existed = name in config.agent.personalities;
+  config.agent.personalities[name] = prompt;
+  saveConfig(config);
+
+  console.log(`${existed ? "Updated" : "Added"}: ${name}`);
+}
+
+function remove(name: string) {
+  const config = loadConfig();
+  const personalities = getPersonalities(config);
+
+  if (!(name in personalities)) {
+    console.error(`Personality not found: ${name}`);
+    process.exit(1);
+  }
+
+  delete config.agent!.personalities![name];
+  saveConfig(config);
+  console.log(`Removed: ${name}`);
+}
+
+function switchLocal(name: string) {
+  const config = loadConfig();
+  const personalities = getPersonalities(config);
+
+  if (name === "none" || name === "default") {
+    if (!config.agent) config.agent = {};
+    config.agent.system_prompt = "";
+    saveConfig(config);
+    console.log("Personality cleared.");
+    return;
+  }
+
+  if (!(name in personalities)) {
+    console.error(`Personality not found: ${name}`);
+    console.error(`Available: ${Object.keys(personalities).join(", ")}`);
+    process.exit(1);
+  }
+
+  const prompt = resolvePrompt(personalities[name]);
+  if (!config.agent) config.agent = {};
+  config.agent.system_prompt = prompt;
+  saveConfig(config);
+  console.log(`Switched to: ${name}`);
+}
+
+async function switchTelegram(name: string) {
+  const config = loadConfig();
+  const personalities = getPersonalities(config);
+
+  if (name !== "none" && name !== "default" && !(name in personalities)) {
+    console.error(`Personality not found: ${name}`);
+    console.error(`Available: ${Object.keys(personalities).join(", ")}`);
+    process.exit(1);
+  }
+
+  // Find bot token
+  let token = process.env.TELEGRAM_BOT_TOKEN || "";
+  if (!token) {
+    const envPath = join(homedir(), ".hermes", ".env");
+    if (existsSync(envPath)) {
+      for (const line of readFileSync(envPath, "utf-8").split("\n")) {
+        if (line.startsWith("TELEGRAM_BOT_TOKEN=")) {
+          token = line.split("=")[1].trim();
+        }
+      }
+    }
+  }
+
+  if (!token) {
+    console.error("TELEGRAM_BOT_TOKEN not found");
+    process.exit(1);
+  }
+
+  const chatId =
+    process.env.TELEGRAM_HOME_CHANNEL ||
+    (config as Record<string, unknown>).TELEGRAM_HOME_CHANNEL ||
+    "";
+
+  if (!chatId) {
+    console.error("TELEGRAM_HOME_CHANNEL not configured");
+    process.exit(1);
+  }
+
+  const displayName = name === "none" || name === "default" ? "none" : name;
+  const url = `https://api.telegram.org/bot${token}/sendMessage`;
+  const resp = await fetch(url, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({ chat_id: chatId, text: `/personality ${displayName}` }),
+  });
+
+  const result = await resp.json() as { ok: boolean; description?: string };
+  if (result.ok) {
+    console.log(`Sent /personality ${displayName} to chat ${chatId}`);
+  } else {
+    console.error(`Telegram API error: ${result.description}`);
+    process.exit(1);
+  }
+}
+
+// --- CLI ---
+
+const HELP = `hermes-har personality — Manage personality presets
+
+Usage:
+  hermes-har personality list                  List all personalities
+  hermes-har personality show <name>           Show personality details
+  hermes-har personality add <name> <prompt>   Add or update a personality
+  hermes-har personality remove <name>         Remove a personality
+  hermes-har personality switch <name>         Switch personality (writes config)
+  hermes-har personality switch <name> --tg    Switch via Telegram /personality command`;
+
+export async function personality(args: string[]) {
+  const action = args[0];
+
+  if (!action || action === "--help" || action === "help") {
+    console.log(HELP);
+    return;
+  }
+
+  switch (action) {
+    case "list":
+    case "ls":
+      list();
+      break;
+
+    case "show":
+    case "get":
+      if (!args[1]) {
+        console.error("Usage: hermes-har personality show <name>");
+        process.exit(1);
+      }
+      show(args[1]);
+      break;
+
+    case "add":
+    case "set":
+      if (!args[1] || !args[2]) {
+        console.error("Usage: hermes-har personality add <name> <prompt>");
+        process.exit(1);
+      }
+      add(args[1], args.slice(2).join(" "));
+      break;
+
+    case "remove":
+    case "rm":
+    case "delete":
+      if (!args[1]) {
+        console.error("Usage: hermes-har personality remove <name>");
+        process.exit(1);
+      }
+      remove(args[1]);
+      break;
+
+    case "switch":
+    case "use":
+      if (!args[1]) {
+        console.error("Usage: hermes-har personality switch <name> [--tg]");
+        process.exit(1);
+      }
+      if (args.includes("--tg") || args.includes("--telegram")) {
+        await switchTelegram(args[1]);
+      } else {
+        switchLocal(args[1]);
+      }
+      break;
+
+    default:
+      console.error(`Unknown action: ${action}`);
+      console.log(HELP);
+      process.exit(1);
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..b2e7497
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    // Environment setup & latest features
+    "lib": ["ESNext"],
+    "target": "ESNext",
+    "module": "Preserve",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+    "types": ["bun"],
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}