diff --git a/README.md b/README.md
index 8aaa52b..5a490fc 100644
--- a/README.md
+++ b/README.md
@@ -168,7 +168,32 @@ If you don't want all this, as mentioned, you can just pick and choose specific
 
 ### For Humans
 
-Let the LLM Agent handle the grunt work. Paste this into a fresh opencode session:
+**Option 1: CLI Installer (Recommended)**
+
+The easiest way to install. Interactive prompts guide you through setup:
+
+```bash
+bunx oh-my-opencode install
+```
+
+Or use non-interactive mode for automation:
+
+```bash
+bunx oh-my-opencode install --no-tui --claude=max20 --chatgpt=yes --gemini=yes
+```
+
+**CLI Options:**
+| Option | Values | Description |
+|--------|--------|-------------|
+| `--claude` | `no`, `yes`, `max20` | Claude Pro/Max subscription |
+| `--chatgpt` | `no`, `yes` | ChatGPT Plus/Pro subscription |
+| `--gemini` | `no`, `yes` | Google Gemini integration |
+| `--no-tui` | - | Non-interactive mode (requires all options) |
+| `--skip-auth` | - | Skip authentication setup hints |
+
+**Option 2: Let an LLM Agent do it**
+
+Paste this into a fresh opencode session:
 ```
 Install and configure by following the instructions here https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/refs/heads/master/README.md
 ```
diff --git a/bun.lock b/bun.lock
index de4aa23..9217d57 100644
--- a/bun.lock
+++ b/bun.lock
@@ -7,10 +7,13 @@
       "dependencies": {
         "@ast-grep/cli": "^0.40.0",
         "@ast-grep/napi": "^0.40.0",
+        "@clack/prompts": "^0.11.0",
         "@code-yeongyu/comment-checker": "^0.6.0",
         "@openauthjs/openauth": "^0.4.3",
         "@opencode-ai/plugin": "^1.0.162",
+        "commander": "^14.0.2",
         "hono": "^4.10.4",
+        "picocolors": "^1.1.1",
         "picomatch": "^4.0.2",
         "xdg-basedir": "^5.1.0",
         "zod": "^4.1.8",
@@ -64,6 +67,10 @@
 
     "@ast-grep/napi-win32-x64-msvc": ["@ast-grep/napi-win32-x64-msvc@0.40.0", "", { "os": "win32", "cpu": "x64" }, "sha512-Hk2IwfPqMFGZt5SRxsoWmGLxBXxprow4LRp1eG6V8EEiJCNHxZ9ZiEaIc5bNvMDBjHVSnqZAXT22dROhrcSKQg=="],
 
+    "@clack/core": ["@clack/core@0.5.0", "", { "dependencies": { "picocolors": "^1.0.0", "sisteransi": "^1.0.5" } }, "sha512-p3y0FIOwaYRUPRcMO7+dlmLh8PSRcrjuTndsiA0WAFbWES0mLZlrjVoBRZ9DzkPFJZG6KGkJmoEAY0ZcVWTkow=="],
+
+    "@clack/prompts": ["@clack/prompts@0.11.0", "", { "dependencies": { "@clack/core": "0.5.0", "picocolors": "^1.0.0", "sisteransi": "^1.0.5" } }, "sha512-pMN5FcrEw9hUkZA4f+zLlzivQSeQf5dRGJjSUbvVYDLvpKCdQx5OaknvKzgbtXOizhP+SJJJjqEbOe55uKKfAw=="],
+
     "@code-yeongyu/comment-checker": ["@code-yeongyu/comment-checker@0.6.0", "", { "os": [ "linux", "win32", "darwin", ], "cpu": [ "x64", "arm64", ], "bin": { "comment-checker": "bin/comment-checker" } }, "sha512-VtDPrhbUJcb5BIS18VMcY/N/xSLbMr6dpU9MO1NYQyEDhI4pSIx07K4gOlCutG/nHVCjO+HEarn8rttODP+5UA=="],
 
     "@openauthjs/openauth": ["@openauthjs/openauth@0.4.3", "", { "dependencies": { "@standard-schema/spec": "1.0.0-beta.3", "aws4fetch": "1.0.20", "jose": "5.9.6" }, "peerDependencies": { "arctic": "^2.2.2", "hono": "^4.0.0" } }, "sha512-RlnjqvHzqcbFVymEwhlUEuac4utA5h4nhSK/i2szZuQmxTIqbGUxZ+nM+avM+VV4Ing+/ZaNLKILoXS3yrkOOw=="],
@@ -94,14 +101,20 @@
 
     "bun-types": ["bun-types@1.3.3", "", { "dependencies": { "@types/node": "*" } }, "sha512-z3Xwlg7j2l9JY27x5Qn3Wlyos8YAp0kKRlrePAOjgjMGS5IG6E7Jnlx736vH9UVI4wUICwwhC9anYL++XeOgTQ=="],
 
+    "commander": ["commander@14.0.2", "", {}, "sha512-TywoWNNRbhoD0BXs1P3ZEScW8W5iKrnbithIl0YH+uCmBd0QpPOA8yc82DS3BIE5Ma6FnBVUsJ7wVUDz4dvOWQ=="],
+
     "detect-libc": ["detect-libc@2.1.2", "", {}, "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ=="],
 
     "hono": ["hono@4.10.8", "", {}, "sha512-DDT0A0r6wzhe8zCGoYOmMeuGu3dyTAE40HHjwUsWFTEy5WxK1x2WDSsBPlEXgPbRIFY6miDualuUDbasPogIww=="],
 
     "jose": ["jose@5.9.6", "", {}, "sha512-AMlnetc9+CV9asI19zHmrgS/WYsWUwCn2R7RzlbJWD7F9eWYUTGyBmU9o6PxngtLGOiDGPRu+Uc4fhKzbpteZQ=="],
 
+    "picocolors": ["picocolors@1.1.1", "", {}, "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA=="],
+
     "picomatch": ["picomatch@4.0.3", "", {}, "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q=="],
 
+    "sisteransi": ["sisteransi@1.0.5", "", {}, "sha512-bLGGlR1QxBcynn2d5YmDX4MGjlZvy2MRBDRNHLJ8VI6l6+9FUiyTFNJ0IveOSP0bcXgVDPRcfGqA0pjaqUpfVg=="],
+
     "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
 
     "undici-types": ["undici-types@7.16.0", "", {}, "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw=="],
diff --git a/package.json b/package.json
index 1763a82..0f7868b 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,9 @@
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "type": "module",
+  "bin": {
+    "oh-my-opencode": "./dist/cli/index.js"
+  },
   "files": [
     "dist"
   ],
@@ -20,7 +23,7 @@
     "./schema.json": "./dist/oh-my-opencode.schema.json"
   },
   "scripts": {
-    "build": "bun build src/index.ts src/google-auth.ts --outdir dist --target bun --format esm --external @ast-grep/napi && tsc --emitDeclarationOnly && bun run build:schema",
+    "build": "bun build src/index.ts src/google-auth.ts --outdir dist --target bun --format esm --external @ast-grep/napi && tsc --emitDeclarationOnly && bun build src/cli/index.ts --outdir dist/cli --target bun --format esm && bun run build:schema",
     "build:schema": "bun run script/build-schema.ts",
     "clean": "rm -rf dist",
     "prepublishOnly": "bun run clean && bun run build",
@@ -49,10 +52,13 @@
   "dependencies": {
     "@ast-grep/cli": "^0.40.0",
     "@ast-grep/napi": "^0.40.0",
+    "@clack/prompts": "^0.11.0",
     "@code-yeongyu/comment-checker": "^0.6.0",
     "@openauthjs/openauth": "^0.4.3",
     "@opencode-ai/plugin": "^1.0.162",
+    "commander": "^14.0.2",
     "hono": "^4.10.4",
+    "picocolors": "^1.1.1",
     "picomatch": "^4.0.2",
     "xdg-basedir": "^5.1.0",
     "zod": "^4.1.8"
diff --git a/src/cli/config-manager.ts b/src/cli/config-manager.ts
new file mode 100644
index 0000000..8bc5cdb
--- /dev/null
+++ b/src/cli/config-manager.ts
@@ -0,0 +1,484 @@
+import { existsSync, readFileSync, writeFileSync, mkdirSync } from "node:fs"
+import { join } from "node:path"
+import { homedir } from "node:os"
+import type { ConfigMergeResult, InstallConfig, DetectedConfig } from "./types"
+
+const OPENCODE_CONFIG_DIR = join(homedir(), ".config", "opencode")
+const OPENCODE_JSON = join(OPENCODE_CONFIG_DIR, "opencode.json")
+const OPENCODE_JSONC = join(OPENCODE_CONFIG_DIR, "opencode.jsonc")
+const OPENCODE_PACKAGE_JSON = join(OPENCODE_CONFIG_DIR, "package.json")
+const OMO_CONFIG = join(OPENCODE_CONFIG_DIR, "oh-my-opencode.json")
+
+const CHATGPT_HOTFIX_REPO = "code-yeongyu/opencode-openai-codex-auth#fix/orphaned-function-call-output-with-tools"
+
+export async function fetchLatestVersion(packageName: string): Promise<string | null> {
+  try {
+    const res = await fetch(`https://registry.npmjs.org/${packageName}/latest`)
+    if (!res.ok) return null
+    const data = await res.json() as { version: string }
+    return data.version
+  } catch {
+    return null
+  }
+}
+
+type ConfigFormat = "json" | "jsonc" | "none"
+
+interface OpenCodeConfig {
+  plugin?: string[]
+  [key: string]: unknown
+}
+
+export function detectConfigFormat(): { format: ConfigFormat; path: string } {
+  if (existsSync(OPENCODE_JSONC)) {
+    return { format: "jsonc", path: OPENCODE_JSONC }
+  }
+  if (existsSync(OPENCODE_JSON)) {
+    return { format: "json", path: OPENCODE_JSON }
+  }
+  return { format: "none", path: OPENCODE_JSON }
+}
+
+function stripJsoncComments(content: string): string {
+  let result = ""
+  let i = 0
+  let inString = false
+  let escape = false
+
+  while (i < content.length) {
+    const char = content[i]
+
+    if (escape) {
+      result += char
+      escape = false
+      i++
+      continue
+    }
+
+    if (char === "\\") {
+      result += char
+      escape = true
+      i++
+      continue
+    }
+
+    if (char === '"' && !inString) {
+      inString = true
+      result += char
+      i++
+      continue
+    }
+
+    if (char === '"' && inString) {
+      inString = false
+      result += char
+      i++
+      continue
+    }
+
+    if (inString) {
+      result += char
+      i++
+      continue
+    }
+
+    // Outside string - check for comments
+    if (char === "/" && content[i + 1] === "/") {
+      // Line comment - skip to end of line
+      while (i < content.length && content[i] !== "\n") {
+        i++
+      }
+      continue
+    }
+
+    if (char === "/" && content[i + 1] === "*") {
+      // Block comment - skip to */
+      i += 2
+      while (i < content.length - 1 && !(content[i] === "*" && content[i + 1] === "/")) {
+        i++
+      }
+      i += 2
+      continue
+    }
+
+    result += char
+    i++
+  }
+
+  return result.replace(/,(\s*[}\]])/g, "$1")
+}
+
+function parseConfig(path: string, isJsonc: boolean): OpenCodeConfig | null {
+  try {
+    const content = readFileSync(path, "utf-8")
+    const cleaned = isJsonc ? stripJsoncComments(content) : content
+    return JSON.parse(cleaned) as OpenCodeConfig
+  } catch {
+    return null
+  }
+}
+
+function ensureConfigDir(): void {
+  if (!existsSync(OPENCODE_CONFIG_DIR)) {
+    mkdirSync(OPENCODE_CONFIG_DIR, { recursive: true })
+  }
+}
+
+export function addPluginToOpenCodeConfig(): ConfigMergeResult {
+  ensureConfigDir()
+
+  const { format, path } = detectConfigFormat()
+  const pluginName = "oh-my-opencode"
+
+  try {
+    if (format === "none") {
+      const config: OpenCodeConfig = { plugin: [pluginName] }
+      writeFileSync(path, JSON.stringify(config, null, 2) + "\n")
+      return { success: true, configPath: path }
+    }
+
+    const config = parseConfig(path, format === "jsonc")
+    if (!config) {
+      return { success: false, configPath: path, error: "Failed to parse config" }
+    }
+
+    const plugins = config.plugin ?? []
+    if (plugins.some((p) => p.startsWith(pluginName))) {
+      return { success: true, configPath: path }
+    }
+
+    config.plugin = [...plugins, pluginName]
+
+    if (format === "jsonc") {
+      const content = readFileSync(path, "utf-8")
+      const pluginArrayRegex = /"plugin"\s*:\s*\[([\s\S]*?)\]/
+      const match = content.match(pluginArrayRegex)
+
+      if (match) {
+        const arrayContent = match[1].trim()
+        const newArrayContent = arrayContent
+          ? `${arrayContent},\n    "${pluginName}"`
+          : `"${pluginName}"`
+        const newContent = content.replace(pluginArrayRegex, `"plugin": [\n    ${newArrayContent}\n  ]`)
+        writeFileSync(path, newContent)
+      } else {
+        const newContent = content.replace(/^(\s*\{)/, `$1\n  "plugin": ["${pluginName}"],`)
+        writeFileSync(path, newContent)
+      }
+    } else {
+      writeFileSync(path, JSON.stringify(config, null, 2) + "\n")
+    }
+
+    return { success: true, configPath: path }
+  } catch (err) {
+    return { success: false, configPath: path, error: String(err) }
+  }
+}
+
+function deepMerge<T extends Record<string, unknown>>(target: T, source: Partial<T>): T {
+  const result = { ...target }
+
+  for (const key of Object.keys(source) as Array<keyof T>) {
+    const sourceValue = source[key]
+    const targetValue = result[key]
+
+    if (
+      sourceValue !== null &&
+      typeof sourceValue === "object" &&
+      !Array.isArray(sourceValue) &&
+      targetValue !== null &&
+      typeof targetValue === "object" &&
+      !Array.isArray(targetValue)
+    ) {
+      result[key] = deepMerge(
+        targetValue as Record<string, unknown>,
+        sourceValue as Record<string, unknown>
+      ) as T[keyof T]
+    } else if (sourceValue !== undefined) {
+      result[key] = sourceValue as T[keyof T]
+    }
+  }
+
+  return result
+}
+
+export function generateOmoConfig(installConfig: InstallConfig): Record<string, unknown> {
+  const config: Record<string, unknown> = {
+    $schema: "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json",
+  }
+
+  if (installConfig.hasGemini) {
+    config.google_auth = false
+  }
+
+  const agents: Record<string, Record<string, unknown>> = {}
+
+  if (!installConfig.hasClaude) {
+    agents["Sisyphus"] = { model: "opencode/big-pickle" }
+    agents["librarian"] = { model: "opencode/big-pickle" }
+  } else if (!installConfig.isMax20) {
+    agents["librarian"] = { model: "opencode/big-pickle" }
+  }
+
+  if (!installConfig.hasChatGPT) {
+    agents["oracle"] = {
+      model: installConfig.hasClaude ? "anthropic/claude-opus-4-5" : "opencode/big-pickle",
+    }
+  }
+
+  if (installConfig.hasGemini) {
+    agents["frontend-ui-ux-engineer"] = { model: "google/gemini-3-pro-high" }
+    agents["document-writer"] = { model: "google/gemini-3-flash" }
+    agents["multimodal-looker"] = { model: "google/gemini-3-flash" }
+  } else {
+    const fallbackModel = installConfig.hasClaude ? "anthropic/claude-opus-4-5" : "opencode/big-pickle"
+    agents["frontend-ui-ux-engineer"] = { model: fallbackModel }
+    agents["document-writer"] = { model: fallbackModel }
+    agents["multimodal-looker"] = { model: fallbackModel }
+  }
+
+  if (Object.keys(agents).length > 0) {
+    config.agents = agents
+  }
+
+  return config
+}
+
+export function writeOmoConfig(installConfig: InstallConfig): ConfigMergeResult {
+  ensureConfigDir()
+
+  try {
+    const newConfig = generateOmoConfig(installConfig)
+
+    if (existsSync(OMO_CONFIG)) {
+      const content = readFileSync(OMO_CONFIG, "utf-8")
+      const cleaned = stripJsoncComments(content)
+      const existing = JSON.parse(cleaned) as Record<string, unknown>
+      delete existing.agents
+      const merged = deepMerge(existing, newConfig)
+      writeFileSync(OMO_CONFIG, JSON.stringify(merged, null, 2) + "\n")
+    } else {
+      writeFileSync(OMO_CONFIG, JSON.stringify(newConfig, null, 2) + "\n")
+    }
+
+    return { success: true, configPath: OMO_CONFIG }
+  } catch (err) {
+    return { success: false, configPath: OMO_CONFIG, error: String(err) }
+  }
+}
+
+export async function isOpenCodeInstalled(): Promise<boolean> {
+  try {
+    const proc = Bun.spawn(["opencode", "--version"], {
+      stdout: "pipe",
+      stderr: "pipe",
+    })
+    await proc.exited
+    return proc.exitCode === 0
+  } catch {
+    return false
+  }
+}
+
+export async function getOpenCodeVersion(): Promise<string | null> {
+  try {
+    const proc = Bun.spawn(["opencode", "--version"], {
+      stdout: "pipe",
+      stderr: "pipe",
+    })
+    const output = await new Response(proc.stdout).text()
+    await proc.exited
+    return proc.exitCode === 0 ? output.trim() : null
+  } catch {
+    return null
+  }
+}
+
+export async function addAuthPlugins(config: InstallConfig): Promise<ConfigMergeResult> {
+  ensureConfigDir()
+  const { format, path } = detectConfigFormat()
+
+  try {
+    const existingConfig = format !== "none" ? parseConfig(path, format === "jsonc") : null
+    const plugins: string[] = existingConfig?.plugin ?? []
+
+    if (config.hasGemini) {
+      const version = await fetchLatestVersion("opencode-antigravity-auth")
+      const pluginEntry = version ? `opencode-antigravity-auth@${version}` : "opencode-antigravity-auth"
+      if (!plugins.some((p) => p.startsWith("opencode-antigravity-auth"))) {
+        plugins.push(pluginEntry)
+      }
+    }
+
+    if (config.hasChatGPT) {
+      if (!plugins.some((p) => p.startsWith("opencode-openai-codex-auth"))) {
+        plugins.push("opencode-openai-codex-auth")
+      }
+    }
+
+    const newConfig = { ...(existingConfig ?? {}), plugin: plugins }
+    writeFileSync(path, JSON.stringify(newConfig, null, 2) + "\n")
+    return { success: true, configPath: path }
+  } catch (err) {
+    return { success: false, configPath: path, error: String(err) }
+  }
+}
+
+export function setupChatGPTHotfix(): ConfigMergeResult {
+  ensureConfigDir()
+
+  try {
+    let packageJson: Record<string, unknown> = {}
+    if (existsSync(OPENCODE_PACKAGE_JSON)) {
+      const content = readFileSync(OPENCODE_PACKAGE_JSON, "utf-8")
+      packageJson = JSON.parse(content)
+    }
+
+    const deps = (packageJson.dependencies ?? {}) as Record<string, string>
+    deps["opencode-openai-codex-auth"] = CHATGPT_HOTFIX_REPO
+    packageJson.dependencies = deps
+
+    writeFileSync(OPENCODE_PACKAGE_JSON, JSON.stringify(packageJson, null, 2) + "\n")
+    return { success: true, configPath: OPENCODE_PACKAGE_JSON }
+  } catch (err) {
+    return { success: false, configPath: OPENCODE_PACKAGE_JSON, error: String(err) }
+  }
+}
+
+export async function runBunInstall(): Promise<boolean> {
+  try {
+    const proc = Bun.spawn(["bun", "install"], {
+      cwd: OPENCODE_CONFIG_DIR,
+      stdout: "pipe",
+      stderr: "pipe",
+    })
+    await proc.exited
+    return proc.exitCode === 0
+  } catch {
+    return false
+  }
+}
+
+const ANTIGRAVITY_PROVIDER_CONFIG = {
+  google: {
+    name: "Google",
+    api: "antigravity",
+    models: {
+      "gemini-3-pro-high": { name: "Gemini 3 Pro (High)", thinking: true, attachment: true },
+      "gemini-3-pro-medium": { name: "Gemini 3 Pro (Medium)", thinking: true, attachment: true },
+      "gemini-3-pro-low": { name: "Gemini 3 Pro (Low)", thinking: true, attachment: true },
+      "gemini-3-flash": { name: "Gemini 3 Flash", attachment: true },
+      "gemini-3-flash-lite": { name: "Gemini 3 Flash Lite", attachment: true },
+    },
+  },
+}
+
+const CODEX_PROVIDER_CONFIG = {
+  openai: {
+    name: "OpenAI",
+    api: "codex",
+    models: {
+      "gpt-5.2": { name: "GPT-5.2" },
+      "o3": { name: "o3", thinking: true },
+      "o4-mini": { name: "o4-mini", thinking: true },
+      "codex-1": { name: "Codex-1" },
+    },
+  },
+}
+
+export function addProviderConfig(config: InstallConfig): ConfigMergeResult {
+  ensureConfigDir()
+  const { format, path } = detectConfigFormat()
+
+  try {
+    const existingConfig = format !== "none" ? parseConfig(path, format === "jsonc") : null
+    const newConfig = { ...(existingConfig ?? {}) }
+
+    const providers = (newConfig.provider ?? {}) as Record<string, unknown>
+
+    if (config.hasGemini) {
+      providers.google = ANTIGRAVITY_PROVIDER_CONFIG.google
+    }
+
+    if (config.hasChatGPT) {
+      providers.openai = CODEX_PROVIDER_CONFIG.openai
+    }
+
+    if (Object.keys(providers).length > 0) {
+      newConfig.provider = providers
+    }
+
+    writeFileSync(path, JSON.stringify(newConfig, null, 2) + "\n")
+    return { success: true, configPath: path }
+  } catch (err) {
+    return { success: false, configPath: path, error: String(err) }
+  }
+}
+
+interface OmoConfigData {
+  google_auth?: boolean
+  agents?: Record<string, { model?: string }>
+}
+
+export function detectCurrentConfig(): DetectedConfig {
+  const result: DetectedConfig = {
+    isInstalled: false,
+    hasClaude: true,
+    isMax20: true,
+    hasChatGPT: true,
+    hasGemini: false,
+  }
+
+  const { format, path } = detectConfigFormat()
+  if (format === "none") {
+    return result
+  }
+
+  const openCodeConfig = parseConfig(path, format === "jsonc")
+  if (!openCodeConfig) {
+    return result
+  }
+
+  const plugins = openCodeConfig.plugin ?? []
+  result.isInstalled = plugins.some((p) => p.startsWith("oh-my-opencode"))
+
+  if (!result.isInstalled) {
+    return result
+  }
+
+  result.hasGemini = plugins.some((p) => p.startsWith("opencode-antigravity-auth"))
+  result.hasChatGPT = plugins.some((p) => p.startsWith("opencode-openai-codex-auth"))
+
+  if (!existsSync(OMO_CONFIG)) {
+    return result
+  }
+
+  try {
+    const content = readFileSync(OMO_CONFIG, "utf-8")
+    const omoConfig = JSON.parse(stripJsoncComments(content)) as OmoConfigData
+
+    const agents = omoConfig.agents ?? {}
+
+    if (agents["Sisyphus"]?.model === "opencode/big-pickle") {
+      result.hasClaude = false
+      result.isMax20 = false
+    } else if (agents["librarian"]?.model === "opencode/big-pickle") {
+      result.hasClaude = true
+      result.isMax20 = false
+    }
+
+    if (agents["oracle"]?.model?.startsWith("anthropic/")) {
+      result.hasChatGPT = false
+    } else if (agents["oracle"]?.model === "opencode/big-pickle") {
+      result.hasChatGPT = false
+    }
+
+    if (omoConfig.google_auth === false) {
+      result.hasGemini = plugins.some((p) => p.startsWith("opencode-antigravity-auth"))
+    }
+  } catch {
+    /* intentionally empty - malformed config returns defaults */
+  }
+
+  return result
+}
diff --git a/src/cli/index.ts b/src/cli/index.ts
new file mode 100644
index 0000000..f2cfb14
--- /dev/null
+++ b/src/cli/index.ts
@@ -0,0 +1,54 @@
+#!/usr/bin/env bun
+import { Command } from "commander"
+import { install } from "./install"
+import type { InstallArgs } from "./types"
+
+const packageJson = await import("../../package.json")
+const VERSION = packageJson.version
+
+const program = new Command()
+
+program
+  .name("oh-my-opencode")
+  .description("The ultimate OpenCode plugin - multi-model orchestration, LSP tools, and more")
+  .version(VERSION, "-v, --version", "Show version number")
+
+program
+  .command("install")
+  .description("Install and configure oh-my-opencode with interactive setup")
+  .option("--no-tui", "Run in non-interactive mode (requires all options)")
+  .option("--claude <value>", "Claude subscription: no, yes, max20")
+  .option("--chatgpt <value>", "ChatGPT subscription: no, yes")
+  .option("--gemini <value>", "Gemini integration: no, yes")
+  .option("--skip-auth", "Skip authentication setup hints")
+  .addHelpText("after", `
+Examples:
+  $ bunx oh-my-opencode install
+  $ bunx oh-my-opencode install --no-tui --claude=max20 --chatgpt=yes --gemini=yes
+  $ bunx oh-my-opencode install --no-tui --claude=no --chatgpt=no --gemini=no
+
+Model Providers:
+  Claude      Required for Sisyphus (main orchestrator) and Librarian agents
+  ChatGPT     Powers the Oracle agent for debugging and architecture
+  Gemini      Powers frontend, documentation, and multimodal agents
+`)
+  .action(async (options) => {
+    const args: InstallArgs = {
+      tui: options.tui !== false,
+      claude: options.claude,
+      chatgpt: options.chatgpt,
+      gemini: options.gemini,
+      skipAuth: options.skipAuth ?? false,
+    }
+    const exitCode = await install(args)
+    process.exit(exitCode)
+  })
+
+program
+  .command("version")
+  .description("Show version information")
+  .action(() => {
+    console.log(`oh-my-opencode v${VERSION}`)
+  })
+
+program.parse()
diff --git a/src/cli/install.ts b/src/cli/install.ts
new file mode 100644
index 0000000..4489b38
--- /dev/null
+++ b/src/cli/install.ts
@@ -0,0 +1,456 @@
+import * as p from "@clack/prompts"
+import color from "picocolors"
+import type { InstallArgs, InstallConfig, ClaudeSubscription, BooleanArg, DetectedConfig } from "./types"
+import {
+  addPluginToOpenCodeConfig,
+  writeOmoConfig,
+  isOpenCodeInstalled,
+  getOpenCodeVersion,
+  addAuthPlugins,
+  setupChatGPTHotfix,
+  runBunInstall,
+  addProviderConfig,
+  detectCurrentConfig,
+} from "./config-manager"
+
+const SYMBOLS = {
+  check: color.green("✓"),
+  cross: color.red("✗"),
+  arrow: color.cyan("→"),
+  bullet: color.dim("•"),
+  info: color.blue("ℹ"),
+  warn: color.yellow("⚠"),
+  star: color.yellow("★"),
+}
+
+function formatProvider(name: string, enabled: boolean, detail?: string): string {
+  const status = enabled ? SYMBOLS.check : color.dim("○")
+  const label = enabled ? color.white(name) : color.dim(name)
+  const suffix = detail ? color.dim(` (${detail})`) : ""
+  return `  ${status} ${label}${suffix}`
+}
+
+function formatConfigSummary(config: InstallConfig): string {
+  const lines: string[] = []
+
+  lines.push(color.bold(color.white("Configuration Summary")))
+  lines.push("")
+
+  const claudeDetail = config.hasClaude ? (config.isMax20 ? "max20" : "standard") : undefined
+  lines.push(formatProvider("Claude", config.hasClaude, claudeDetail))
+  lines.push(formatProvider("ChatGPT", config.hasChatGPT))
+  lines.push(formatProvider("Gemini", config.hasGemini))
+
+  lines.push("")
+  lines.push(color.dim("─".repeat(40)))
+  lines.push("")
+
+  lines.push(color.bold(color.white("Agent Configuration")))
+  lines.push("")
+
+  const sisyphusModel = config.hasClaude ? "claude-opus-4-5" : "big-pickle"
+  const oracleModel = config.hasChatGPT ? "gpt-5.2" : (config.hasClaude ? "claude-opus-4-5" : "big-pickle")
+  const librarianModel = config.hasClaude && config.isMax20 ? "claude-sonnet-4-5" : "big-pickle"
+  const frontendModel = config.hasGemini ? "gemini-3-pro-high" : (config.hasClaude ? "claude-opus-4-5" : "big-pickle")
+
+  lines.push(`  ${SYMBOLS.bullet} Sisyphus     ${SYMBOLS.arrow} ${color.cyan(sisyphusModel)}`)
+  lines.push(`  ${SYMBOLS.bullet} Oracle       ${SYMBOLS.arrow} ${color.cyan(oracleModel)}`)
+  lines.push(`  ${SYMBOLS.bullet} Librarian    ${SYMBOLS.arrow} ${color.cyan(librarianModel)}`)
+  lines.push(`  ${SYMBOLS.bullet} Frontend     ${SYMBOLS.arrow} ${color.cyan(frontendModel)}`)
+
+  return lines.join("\n")
+}
+
+function printHeader(isUpdate: boolean): void {
+  const mode = isUpdate ? "Update" : "Install"
+  console.log()
+  console.log(color.bgMagenta(color.white(` oMoMoMoMo... ${mode} `)))
+  console.log()
+}
+
+function printStep(step: number, total: number, message: string): void {
+  const progress = color.dim(`[${step}/${total}]`)
+  console.log(`${progress} ${message}`)
+}
+
+function printSuccess(message: string): void {
+  console.log(`${SYMBOLS.check} ${message}`)
+}
+
+function printError(message: string): void {
+  console.log(`${SYMBOLS.cross} ${color.red(message)}`)
+}
+
+function printInfo(message: string): void {
+  console.log(`${SYMBOLS.info} ${message}`)
+}
+
+function printWarning(message: string): void {
+  console.log(`${SYMBOLS.warn} ${color.yellow(message)}`)
+}
+
+function printBox(content: string, title?: string): void {
+  const lines = content.split("\n")
+  const maxWidth = Math.max(...lines.map(l => l.replace(/\x1b\[[0-9;]*m/g, "").length), title?.length ?? 0) + 4
+  const border = color.dim("─".repeat(maxWidth))
+
+  console.log()
+  if (title) {
+    console.log(color.dim("┌─") + color.bold(` ${title} `) + color.dim("─".repeat(maxWidth - title.length - 4)) + color.dim("┐"))
+  } else {
+    console.log(color.dim("┌") + border + color.dim("┐"))
+  }
+
+  for (const line of lines) {
+    const stripped = line.replace(/\x1b\[[0-9;]*m/g, "")
+    const padding = maxWidth - stripped.length
+    console.log(color.dim("│") + ` ${line}${" ".repeat(padding - 1)}` + color.dim("│"))
+  }
+
+  console.log(color.dim("└") + border + color.dim("┘"))
+  console.log()
+}
+
+function validateNonTuiArgs(args: InstallArgs): { valid: boolean; errors: string[] } {
+  const errors: string[] = []
+
+  if (args.claude === undefined) {
+    errors.push("--claude is required (values: no, yes, max20)")
+  } else if (!["no", "yes", "max20"].includes(args.claude)) {
+    errors.push(`Invalid --claude value: ${args.claude} (expected: no, yes, max20)`)
+  }
+
+  if (args.chatgpt === undefined) {
+    errors.push("--chatgpt is required (values: no, yes)")
+  } else if (!["no", "yes"].includes(args.chatgpt)) {
+    errors.push(`Invalid --chatgpt value: ${args.chatgpt} (expected: no, yes)`)
+  }
+
+  if (args.gemini === undefined) {
+    errors.push("--gemini is required (values: no, yes)")
+  } else if (!["no", "yes"].includes(args.gemini)) {
+    errors.push(`Invalid --gemini value: ${args.gemini} (expected: no, yes)`)
+  }
+
+  return { valid: errors.length === 0, errors }
+}
+
+function argsToConfig(args: InstallArgs): InstallConfig {
+  return {
+    hasClaude: args.claude !== "no",
+    isMax20: args.claude === "max20",
+    hasChatGPT: args.chatgpt === "yes",
+    hasGemini: args.gemini === "yes",
+  }
+}
+
+function detectedToInitialValues(detected: DetectedConfig): { claude: ClaudeSubscription; chatgpt: BooleanArg; gemini: BooleanArg } {
+  let claude: ClaudeSubscription = "no"
+  if (detected.hasClaude) {
+    claude = detected.isMax20 ? "max20" : "yes"
+  }
+
+  return {
+    claude,
+    chatgpt: detected.hasChatGPT ? "yes" : "no",
+    gemini: detected.hasGemini ? "yes" : "no",
+  }
+}
+
+async function runTuiMode(detected: DetectedConfig): Promise<InstallConfig | null> {
+  const initial = detectedToInitialValues(detected)
+
+  const claude = await p.select({
+    message: "Do you have a Claude Pro/Max subscription?",
+    options: [
+      { value: "no" as const, label: "No", hint: "Will use opencode/big-pickle as fallback" },
+      { value: "yes" as const, label: "Yes (standard)", hint: "Claude Opus 4.5 for orchestration" },
+      { value: "max20" as const, label: "Yes (max20 mode)", hint: "Full power with Claude Sonnet 4.5 for Librarian" },
+    ],
+    initialValue: initial.claude,
+  })
+
+  if (p.isCancel(claude)) {
+    p.cancel("Installation cancelled.")
+    return null
+  }
+
+  const chatgpt = await p.select({
+    message: "Do you have a ChatGPT Plus/Pro subscription?",
+    options: [
+      { value: "no" as const, label: "No", hint: "Oracle will use fallback model" },
+      { value: "yes" as const, label: "Yes", hint: "GPT-5.2 for debugging and architecture" },
+    ],
+    initialValue: initial.chatgpt,
+  })
+
+  if (p.isCancel(chatgpt)) {
+    p.cancel("Installation cancelled.")
+    return null
+  }
+
+  const gemini = await p.select({
+    message: "Will you integrate Google Gemini?",
+    options: [
+      { value: "no" as const, label: "No", hint: "Frontend/docs agents will use fallback" },
+      { value: "yes" as const, label: "Yes", hint: "Beautiful UI generation with Gemini 3 Pro" },
+    ],
+    initialValue: initial.gemini,
+  })
+
+  if (p.isCancel(gemini)) {
+    p.cancel("Installation cancelled.")
+    return null
+  }
+
+  return {
+    hasClaude: claude !== "no",
+    isMax20: claude === "max20",
+    hasChatGPT: chatgpt === "yes",
+    hasGemini: gemini === "yes",
+  }
+}
+
+async function runNonTuiInstall(args: InstallArgs): Promise<number> {
+  const validation = validateNonTuiArgs(args)
+  if (!validation.valid) {
+    printHeader(false)
+    printError("Validation failed:")
+    for (const err of validation.errors) {
+      console.log(`  ${SYMBOLS.bullet} ${err}`)
+    }
+    console.log()
+    printInfo("Usage: bunx oh-my-opencode install --no-tui --claude=<no|yes|max20> --chatgpt=<no|yes> --gemini=<no|yes>")
+    console.log()
+    return 1
+  }
+
+  const detected = detectCurrentConfig()
+  const isUpdate = detected.isInstalled
+
+  printHeader(isUpdate)
+
+  const totalSteps = 6
+  let step = 1
+
+  printStep(step++, totalSteps, "Checking OpenCode installation...")
+  const installed = await isOpenCodeInstalled()
+  if (!installed) {
+    printError("OpenCode is not installed on this system.")
+    printInfo("Visit https://opencode.ai/docs for installation instructions")
+    return 1
+  }
+
+  const version = await getOpenCodeVersion()
+  printSuccess(`OpenCode ${version ?? ""} detected`)
+
+  if (isUpdate) {
+    const initial = detectedToInitialValues(detected)
+    printInfo(`Current config: Claude=${initial.claude}, ChatGPT=${initial.chatgpt}, Gemini=${initial.gemini}`)
+  }
+
+  const config = argsToConfig(args)
+
+  printStep(step++, totalSteps, "Adding oh-my-opencode plugin...")
+  const pluginResult = addPluginToOpenCodeConfig()
+  if (!pluginResult.success) {
+    printError(`Failed: ${pluginResult.error}`)
+    return 1
+  }
+  printSuccess(`Plugin ${isUpdate ? "verified" : "added"} ${SYMBOLS.arrow} ${color.dim(pluginResult.configPath)}`)
+
+  if (config.hasGemini || config.hasChatGPT) {
+    printStep(step++, totalSteps, "Adding auth plugins...")
+    const authResult = await addAuthPlugins(config)
+    if (!authResult.success) {
+      printError(`Failed: ${authResult.error}`)
+      return 1
+    }
+    printSuccess(`Auth plugins configured ${SYMBOLS.arrow} ${color.dim(authResult.configPath)}`)
+
+    printStep(step++, totalSteps, "Adding provider configurations...")
+    const providerResult = addProviderConfig(config)
+    if (!providerResult.success) {
+      printError(`Failed: ${providerResult.error}`)
+      return 1
+    }
+    printSuccess(`Providers configured ${SYMBOLS.arrow} ${color.dim(providerResult.configPath)}`)
+  } else {
+    step += 2
+  }
+
+  if (config.hasChatGPT) {
+    printStep(step++, totalSteps, "Setting up ChatGPT hotfix...")
+    const hotfixResult = setupChatGPTHotfix()
+    if (!hotfixResult.success) {
+      printError(`Failed: ${hotfixResult.error}`)
+      return 1
+    }
+    printSuccess(`Hotfix configured ${SYMBOLS.arrow} ${color.dim(hotfixResult.configPath)}`)
+
+    printInfo("Installing dependencies with bun...")
+    const bunSuccess = await runBunInstall()
+    if (bunSuccess) {
+      printSuccess("Dependencies installed")
+    } else {
+      printWarning("bun install failed - run manually: cd ~/.config/opencode && bun i")
+    }
+  } else {
+    step++
+  }
+
+  printStep(step++, totalSteps, "Writing oh-my-opencode configuration...")
+  const omoResult = writeOmoConfig(config)
+  if (!omoResult.success) {
+    printError(`Failed: ${omoResult.error}`)
+    return 1
+  }
+  printSuccess(`Config written ${SYMBOLS.arrow} ${color.dim(omoResult.configPath)}`)
+
+  printBox(formatConfigSummary(config), isUpdate ? "Updated Configuration" : "Installation Complete")
+
+  if (!config.hasClaude && !config.hasChatGPT && !config.hasGemini) {
+    printWarning("No model providers configured. Using opencode/big-pickle as fallback.")
+  }
+
+  if ((config.hasClaude || config.hasChatGPT || config.hasGemini) && !args.skipAuth) {
+    console.log(color.bold("Next Steps - Authenticate your providers:"))
+    console.log()
+    if (config.hasClaude) {
+      console.log(`  ${SYMBOLS.arrow} ${color.dim("opencode auth login")} ${color.gray("(select Anthropic → Claude Pro/Max)")}`)
+    }
+    if (config.hasChatGPT) {
+      console.log(`  ${SYMBOLS.arrow} ${color.dim("opencode auth login")} ${color.gray("(select OpenAI → ChatGPT Plus/Pro)")}`)
+    }
+    if (config.hasGemini) {
+      console.log(`  ${SYMBOLS.arrow} ${color.dim("opencode auth login")} ${color.gray("(select Google → OAuth with Antigravity)")}`)
+    }
+    console.log()
+  }
+
+  console.log(`${SYMBOLS.star} ${color.bold(color.green(isUpdate ? "Configuration updated!" : "Installation complete!"))}`)
+  console.log(`  Run ${color.cyan("opencode")} to start!`)
+  console.log()
+  console.log(color.dim("oMoMoMoMo... Enjoy!"))
+  console.log()
+
+  return 0
+}
+
+export async function install(args: InstallArgs): Promise<number> {
+  if (!args.tui) {
+    return runNonTuiInstall(args)
+  }
+
+  const detected = detectCurrentConfig()
+  const isUpdate = detected.isInstalled
+
+  p.intro(color.bgMagenta(color.white(isUpdate ? " oMoMoMoMo... Update " : " oMoMoMoMo... ")))
+
+  if (isUpdate) {
+    const initial = detectedToInitialValues(detected)
+    p.log.info(`Existing configuration detected: Claude=${initial.claude}, ChatGPT=${initial.chatgpt}, Gemini=${initial.gemini}`)
+  }
+
+  const s = p.spinner()
+  s.start("Checking OpenCode installation")
+
+  const installed = await isOpenCodeInstalled()
+  if (!installed) {
+    s.stop("OpenCode is not installed")
+    p.log.error("OpenCode is not installed on this system.")
+    p.note("Visit https://opencode.ai/docs for installation instructions", "Installation Guide")
+    p.outro(color.red("Please install OpenCode first."))
+    return 1
+  }
+
+  const version = await getOpenCodeVersion()
+  s.stop(`OpenCode ${version ?? "installed"} ${color.green("✓")}`)
+
+  const config = await runTuiMode(detected)
+  if (!config) return 1
+
+  s.start("Adding oh-my-opencode to OpenCode config")
+  const pluginResult = addPluginToOpenCodeConfig()
+  if (!pluginResult.success) {
+    s.stop(`Failed to add plugin: ${pluginResult.error}`)
+    p.outro(color.red("Installation failed."))
+    return 1
+  }
+  s.stop(`Plugin added to ${color.cyan(pluginResult.configPath)}`)
+
+  if (config.hasGemini || config.hasChatGPT) {
+    s.start("Adding auth plugins (fetching latest versions)")
+    const authResult = await addAuthPlugins(config)
+    if (!authResult.success) {
+      s.stop(`Failed to add auth plugins: ${authResult.error}`)
+      p.outro(color.red("Installation failed."))
+      return 1
+    }
+    s.stop(`Auth plugins added to ${color.cyan(authResult.configPath)}`)
+
+    s.start("Adding provider configurations")
+    const providerResult = addProviderConfig(config)
+    if (!providerResult.success) {
+      s.stop(`Failed to add provider config: ${providerResult.error}`)
+      p.outro(color.red("Installation failed."))
+      return 1
+    }
+    s.stop(`Provider config added to ${color.cyan(providerResult.configPath)}`)
+  }
+
+  if (config.hasChatGPT) {
+    s.start("Setting up ChatGPT hotfix")
+    const hotfixResult = setupChatGPTHotfix()
+    if (!hotfixResult.success) {
+      s.stop(`Failed to setup hotfix: ${hotfixResult.error}`)
+      p.outro(color.red("Installation failed."))
+      return 1
+    }
+    s.stop(`Hotfix configured in ${color.cyan(hotfixResult.configPath)}`)
+
+    s.start("Installing dependencies with bun")
+    const bunSuccess = await runBunInstall()
+    if (bunSuccess) {
+      s.stop("Dependencies installed")
+    } else {
+      s.stop(color.yellow("bun install failed - run manually: cd ~/.config/opencode && bun i"))
+    }
+  }
+
+  s.start("Writing oh-my-opencode configuration")
+  const omoResult = writeOmoConfig(config)
+  if (!omoResult.success) {
+    s.stop(`Failed to write config: ${omoResult.error}`)
+    p.outro(color.red("Installation failed."))
+    return 1
+  }
+  s.stop(`Config written to ${color.cyan(omoResult.configPath)}`)
+
+  if (!config.hasClaude && !config.hasChatGPT && !config.hasGemini) {
+    p.log.warn("No model providers configured. Using opencode/big-pickle as fallback.")
+  }
+
+  p.note(formatConfigSummary(config), isUpdate ? "Updated Configuration" : "Installation Complete")
+
+  if ((config.hasClaude || config.hasChatGPT || config.hasGemini) && !args.skipAuth) {
+    const steps: string[] = []
+    if (config.hasClaude) {
+      steps.push(`${color.dim("opencode auth login")} ${color.gray("(select Anthropic → Claude Pro/Max)")}`)
+    }
+    if (config.hasChatGPT) {
+      steps.push(`${color.dim("opencode auth login")} ${color.gray("(select OpenAI → ChatGPT Plus/Pro)")}`)
+    }
+    if (config.hasGemini) {
+      steps.push(`${color.dim("opencode auth login")} ${color.gray("(select Google → OAuth with Antigravity)")}`)
+    }
+    p.note(steps.join("\n"), "Next Steps - Authenticate your providers")
+  }
+
+  p.log.success(color.bold(isUpdate ? "Configuration updated!" : "Installation complete!"))
+  p.log.message(`Run ${color.cyan("opencode")} to start!`)
+
+  p.outro(color.green("oMoMoMoMo... Enjoy!"))
+
+  return 0
+}
diff --git a/src/cli/types.ts b/src/cli/types.ts
new file mode 100644
index 0000000..8876796
--- /dev/null
+++ b/src/cli/types.ts
@@ -0,0 +1,31 @@
+export type ClaudeSubscription = "no" | "yes" | "max20"
+export type BooleanArg = "no" | "yes"
+
+export interface InstallArgs {
+  tui: boolean
+  claude?: ClaudeSubscription
+  chatgpt?: BooleanArg
+  gemini?: BooleanArg
+  skipAuth?: boolean
+}
+
+export interface InstallConfig {
+  hasClaude: boolean
+  isMax20: boolean
+  hasChatGPT: boolean
+  hasGemini: boolean
+}
+
+export interface ConfigMergeResult {
+  success: boolean
+  configPath: string
+  error?: string
+}
+
+export interface DetectedConfig {
+  isInstalled: boolean
+  hasClaude: boolean
+  isMax20: boolean
+  hasChatGPT: boolean
+  hasGemini: boolean
+}