wip

2026-05-27 13:58:58 +09:00
parent 73e8988f31
commit db00bb3d42
18 changed files with 21606 additions and 431 deletions
@@ -0,0 +1,9 @@
+{"permission":"read","pattern":"/Users/yeongyu/.agents/skills/ssh-jobdori-machine/SKILL.md","action":"allow"}
+{"permission":"bash","pattern":"ls","action":"allow"}
+{"permission":"bash","pattern":"ls *","action":"allow"}
+{"permission":"bash","pattern":"ssh","action":"allow"}
+{"permission":"bash","pattern":"ssh *","action":"allow"}
+{"permission":"bash","pattern":"tailscale","action":"allow"}
+{"permission":"bash","pattern":"tailscale *","action":"allow"}
+{"permission":"bash","pattern":"scp","action":"allow"}
+{"permission":"bash","pattern":"scp *","action":"allow"}
@@ -101,30 +101,68 @@ Install oh-my-openagent. Type `ultrawork`. Done.

 ## Installation

+oh-my-openagent ships in two editions of the same product:
+
+- **Ultimate Edition (omo for OpenCode)** — full omo. 11 agents, 54+ lifecycle hooks, 5 built-in MCPs, all slash commands, Team Mode, ultragoal, ultrawork, hashline edits — everything.
+- **Light Edition (omo for Codex CLI)** — the 5 components that port cleanly to Codex's plugin system: `rules`, `comment-checker`, `lsp`, `ultrawork`, `ultragoal`. No agent orchestration, no `team_*` tools, no built-in MCPs beyond LSP — Codex CLI's own surface does that work.
+
+Pick the edition(s) you want.
+
+### TL;DR
+
+| You want | Run | What lands on disk |
+| :--- | :--- | :--- |
+| **Ultimate** (OpenCode) | `bunx omo install` (TUI walks you through it) | Plugin registered in `opencode.json` + agent/model config + provider auth prompts |
+| **Light** (Codex CLI) | `bunx omo install --platform=codex` | `~/.codex/plugins/cache/code-yeongyu-codex-plugins/omo/` + `~/.codex/config.toml` plugin block + `~/.local/bin/omo-*` |
+| **Both** | `bunx omo install --platform=both` | Both of the above |
+
+`--platform` defaults to `opencode` (Ultimate). The `bunx lazycodex install` alias is a one-letter-cheaper shortcut for `bunx omo install --platform=codex` — use whichever reads cleaner.
+
 ### For Humans

-Copy and paste this prompt to your LLM agent (Claude Code, AmpCode, Cursor, etc.):
+**Strongly recommended: let an LLM agent install this for you.** The Ultimate edition setup involves subscription detection, model selection across 11 agents, and per-provider authentication — humans fat-finger these. An LLM agent reads the full guide and walks every step correctly.
+
+Paste this prompt into Claude Code, AmpCode, Cursor, or any agent:

 ```
 Install and configure oh-my-openagent by following the instructions here:
 https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/refs/heads/dev/docs/guide/installation.md
 ```

-Or read the [Installation Guide](docs/guide/installation.md), but seriously, let an agent do it. Humans fat-finger configs.
+If you only want the **Light edition** (Codex CLI), the installer asks no questions and you can run it yourself in one line:
+
+```bash
+bunx omo install --platform=codex
+```
+
+> **Do not** use `npm install -g`, `bun add -g`, or `bun install -g`. Global installation is not officially supported — oh-my-openagent is a plugin that must resolve from where OpenCode/Codex loads plugins. Always invoke via `bunx`.

 ### For LLM Agents

-Fetch the installation guide and follow it:
+Fetch the full guide and follow it step by step:

 ```bash
-curl -s https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/refs/heads/dev/docs/guide/installation.md
+curl -fsSL https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/refs/heads/dev/docs/guide/installation.md
 ```

-**Note**: The published npm package and CLI binary are still named `oh-my-opencode` (dual-published as `oh-my-openagent` during the transition). Inside `opencode.json`, the compatibility layer now prefers the plugin entry `oh-my-openagent`, while legacy `oh-my-opencode` entries still load with a warning. Plugin config files still commonly use `oh-my-opencode.json` or `oh-my-opencode.jsonc`; both legacy and renamed basenames are recognized during the transition.
+The guide covers: platform selection, the subscription interview, provider authentication (Anthropic / Gemini / Copilot / Z.ai / OpenCode Zen), the agent-to-model matching matrix, modes (`ultrawork`, `search`, `analyze`, `team`, `hyperplan`), slash commands, the Codex adapter's 5 components, Team Mode, and uninstall. Don't summarize it — read it end to end.

-Anonymous telemetry is enabled by default to track active installations (DAU/WAU/MAU). A single event is sent at most once per UTC day per machine using a hashed installation identifier, never the raw hostname, and PostHog person profiles are not created. Disable with `OMO_SEND_ANONYMOUS_TELEMETRY=0` or `OMO_DISABLE_POSTHOG=1`. See [Privacy Policy](docs/legal/privacy-policy.md) and [Terms of Service](docs/legal/terms-of-service.md).
+### Note on package and command names

-If you also use OpenAI Codex CLI, add the optional Codex adapter with `bunx omo install --codex=yes` or the shortcut `bunx lazycodex install`. The Codex adapter emits `omo_codex_daily_active` at most once per UTC day per machine from two sources - the installer (`install_completed`) and the Codex plugin runtime on every session start (`session_start`) - using the same hashed installation identifier and PostHog person-profile suppression as the main plugin. Codex-only telemetry can be disabled with `OMO_CODEX_DISABLE_POSTHOG=1` or `OMO_CODEX_SEND_ANONYMOUS_TELEMETRY=0`.
+The published npm package and CLI binary are still named `oh-my-opencode` (dual-published as `oh-my-openagent` during the rename transition). Inside `opencode.json`, the compatibility layer prefers the plugin entry `oh-my-openagent`, while legacy `oh-my-opencode` entries still load with a warning. Plugin config files still commonly use `oh-my-opencode.json[c]`; both legacy and renamed basenames are recognized.
+
+All four `bunx` aliases — `oh-my-opencode`, `oh-my-openagent`, `omo`, `lazycodex` — invoke the same compiled CLI. `omo` is the recommended short form for documentation and prompts. `lazycodex` is a single-purpose shortcut: `bunx lazycodex install` is exactly equivalent to `bunx omo install --platform=codex`.
+
+### Telemetry
+
+Anonymous telemetry is enabled by default to track active installations (DAU/WAU/MAU). For both products, a single event is sent **at most once per UTC day per machine** using a SHA256-hashed installation identifier (never the raw hostname), and PostHog person profiles are not created. The main plugin emits `oh_my_openagent_daily_active`; the Codex adapter emits `omo_codex_daily_active` from two sources (`install_completed` and `session_start`).
+
+Opt out per product:
+
+- Main plugin: `OMO_DISABLE_POSTHOG=1` or `OMO_SEND_ANONYMOUS_TELEMETRY=0`
+- Codex adapter: `OMO_CODEX_DISABLE_POSTHOG=1` or `OMO_CODEX_SEND_ANONYMOUS_TELEMETRY=0` (the global flags also disable Codex)
+
+See [Privacy Policy](docs/legal/privacy-policy.md) and [Terms of Service](docs/legal/terms-of-service.md).

 ---

@@ -159,25 +197,30 @@ Even with only the following subscriptions, `ultrawork` works well (this project
 - [GLM Coding Plan ($10)](https://z.ai/subscribe)
 - If you're eligible for pay-per-token, using Kimi and Gemini models won't cost much.

-|       | Feature                                                  | What it does                                                                                                                                                                                                     |
-| :---: | :------------------------------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-|   🤖   | **Discipline Agents**                                    | Sisyphus orchestrates Hephaestus, Oracle, Librarian, Explore. A full AI dev team in parallel.                                                                                                                    |
-|   🧩   | **Codex Harness Adapter**                                | Same OMO features for OpenAI Codex CLI. Install via `bunx lazycodex install` or `bunx omo install --codex=yes`.                                                                                                   |
-|   👥   | **Team Mode** (v4.0, opt-in)                             | Lead agent + up to 8 parallel members, real-time tmux visualization, dedicated `team_*` tools. Powers `hyperplan` (5 hostile critics) and `security-research` (3 hunters + 2 PoC engineers). [Docs →](docs/guide/team-mode.md)                                                                                                                                       |
-|   ⚡   | **`ultrawork` / `ulw`**                                  | One word. Every agent activates. Doesn't stop until done.                                                                                                                                                        |
-|   🚪   | **[IntentGate](https://factory.ai/news/terminal-bench)** | Analyzes true user intent before classifying or acting. No more literal misinterpretations.                                                                                                                      |
-|   🔗   | **Hash-Anchored Edit Tool**                              | `LINE#ID` content hash validates every change. Zero stale-line errors. Inspired by [oh-my-pi](https://github.com/can1357/oh-my-pi). [The Harness Problem →](https://blog.can.ac/2026/02/12/the-harness-problem/) |
-|   🛠️   | **LSP + AST-Grep**                                       | Workspace rename, pre-build diagnostics, AST-aware rewrites. IDE precision for agents.                                                                                                                           |
-|   🧠   | **Background Agents**                                    | Fire 5+ specialists in parallel. Context stays lean. Results when ready.                                                                                                                                         |
-|   📚   | **Built-in MCPs**                                        | Exa (web search), Context7 (official docs), Grep.app (GitHub search). Always on.                                                                                                                                 |
-|   🔁   | **Ralph Loop / `/ulw-loop`**                             | Self-referential loop. Doesn't stop until 100% done.                                                                                                                                                             |
-|   ✅   | **Todo Enforcer**                                        | Agent goes idle? System yanks it back. Your task gets done, period.                                                                                                                                              |
-|   💬   | **Comment Checker**                                      | No AI slop in comments. Code reads like a senior wrote it.                                                                                                                                                       |
-|   🖥️   | **Tmux Integration**                                     | Full interactive terminal. REPLs, debuggers, TUIs. All live.                                                                                                                                                     |
-|   🔌   | **Claude Code Compatible**                               | Your hooks, commands, skills, MCPs, and plugins? All work here.                                                                                                                                                  |
-|   🎯   | **Skill-Embedded MCPs**                                  | Skills carry their own MCP servers. No context bloat.                                                                                                                                                            |
-|   📋   | **Prometheus Planner**                                   | Interview-mode strategic planning before any execution.                                                                                                                                                          |
-|   🔍   | **`/init-deep`**                                         | Auto-generates hierarchical `AGENTS.md` files throughout your project. Great for both token efficiency and your agent's performance.                                                                             |
+|       | Feature                                                  | Edition  | What it does                                                                                                                                                                                                     |
+| :---: | :------------------------------------------------------- | :------: | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+|   🤖   | **Discipline Agents**                                    | Ultimate | Sisyphus orchestrates Hephaestus, Oracle, Librarian, Explore. A full AI dev team in parallel.                                                                                                                    |
+|   🧩   | **Codex CLI Light Edition**                              | Light    | The 5 portable components of omo (rules, comment-checker, LSP, ultrawork, ultragoal) running inside OpenAI Codex CLI. Install via `bunx omo install --platform=codex`.                                            |
+|   👥   | **Team Mode** (v4.0, opt-in)                             | Ultimate | Lead agent + up to 8 parallel members, real-time tmux visualization, dedicated `team_*` tools. Powers `hyperplan` (5 hostile critics) and `security-research` (3 hunters + 2 PoC engineers). [Docs →](docs/guide/team-mode.md) |
+|   ⚡   | **`ultrawork` / `ulw`**                                  | Both     | One word. Every agent activates. Doesn't stop until done.                                                                                                                                                        |
+|   🚪   | **[IntentGate](https://factory.ai/news/terminal-bench)** | Ultimate | Analyzes true user intent before classifying or acting. No more literal misinterpretations. (Light edition only recognises the `ultrawork`/`ulw` keyword.)                                                       |
+|   🔗   | **Hash-Anchored Edit Tool**                              | Ultimate | `LINE#ID` content hash validates every change. Zero stale-line errors. Inspired by [oh-my-pi](https://github.com/can1357/oh-my-pi). [The Harness Problem →](https://blog.can.ac/2026/02/12/the-harness-problem/) |
+|   🛠️   | **LSP integration**                                      | Both     | Diagnostics, navigation, symbols, workspace rename. IDE precision for agents. Same LSP MCP server in both editions.                                                                                              |
+|   🔎   | **AST-Grep**                                             | Ultimate | Pattern-aware code search and rewriting across 25 languages.                                                                                                                                                     |
+|   🧠   | **Background Agents**                                    | Ultimate | Fire 5+ specialists in parallel. Context stays lean. Results when ready.                                                                                                                                         |
+|   📚   | **Built-in MCPs** (web/docs/code search)                 | Ultimate | Exa (web search), Context7 (official docs), Grep.app (GitHub search). Always on.                                                                                                                                 |
+|   🔁   | **Ralph Loop / `/ulw-loop`**                             | Ultimate | Self-referential loop. Doesn't stop until 100% done.                                                                                                                                                             |
+|   ✅   | **Todo Enforcer**                                        | Ultimate | Agent goes idle? System yanks it back. Your task gets done, period.                                                                                                                                              |
+|   💬   | **Comment Checker**                                      | Both     | No AI slop in comments. Code reads like a senior wrote it.                                                                                                                                                       |
+|   📐   | **Rules Injection** (`AGENTS.md` / `.omo/rules/**`)      | Both     | Project rules and AGENTS.md auto-loaded into the agent's context at every prompt.                                                                                                                                |
+|   🎯   | **Ultragoal**                                            | Both     | Durable multi-goal orchestration with evidence audit, backed by `.omo/ultragoal/`.                                                                                                                               |
+|   🖥️   | **Tmux Integration**                                     | Ultimate | Full interactive terminal. REPLs, debuggers, TUIs. All live.                                                                                                                                                     |
+|   🔌   | **Claude Code Compatible**                               | Ultimate | Your hooks, commands, skills, MCPs, and plugins? All work here.                                                                                                                                                  |
+|   🧬   | **Skill-Embedded MCPs**                                  | Ultimate | Skills carry their own MCP servers. No context bloat.                                                                                                                                                            |
+|   📋   | **Prometheus Planner**                                   | Ultimate | Interview-mode strategic planning before any execution.                                                                                                                                                          |
+|   🔍   | **`/init-deep`**                                         | Ultimate | Auto-generates hierarchical `AGENTS.md` files throughout your project. Great for both token efficiency and your agent's performance.                                                                             |
+
+> **Edition legend.** **Ultimate** = OpenCode-only (`bunx omo install`). **Light** = Codex CLI-only (`bunx omo install --platform=codex`). **Both** = shipped in both editions, often with slightly different implementations under the hood.

 ### Discipline Agents

@@ -0,0 +1,141 @@
+/// <reference types="bun-types" />
+
+import { afterEach, beforeEach, describe, expect, mock, spyOn, test } from "bun:test"
+import { runCliInstaller } from "./cli-installer"
+import * as configManager from "./config-manager"
+import * as codexInstaller from "./install-codex"
+import type { CodexInstallResult } from "./install-codex"
+import type { InstallArgs } from "./types"
+
+const codexResult: CodexInstallResult = {
+  marketplaceName: "code-yeongyu-codex-plugins",
+  installed: [],
+  configPath: "/tmp/codex-config.toml",
+  codexHome: "/tmp/codex-home",
+}
+
+function createOpenCodeArgs(platform: "opencode" | "both"): InstallArgs {
+  return {
+    tui: false,
+    platform,
+    claude: "no",
+    openai: "no",
+    gemini: "no",
+    copilot: "no",
+    opencodeZen: "no",
+    zaiCodingPlan: "no",
+    kimiForCoding: "no",
+    opencodeGo: "no",
+    vercelAiGateway: "no",
+  }
+}
+
+function stubOpenCodeSuccess(): void {
+  spyOn(configManager, "detectCurrentConfig").mockReturnValue({
+    isInstalled: false,
+    installedVersion: null,
+    hasClaude: false,
+    isMax20: false,
+    hasOpenAI: false,
+    hasGemini: false,
+    hasCopilot: false,
+    hasCodex: false,
+    hasOpencodeZen: false,
+    hasZaiCodingPlan: false,
+    hasKimiForCoding: false,
+    hasOpencodeGo: false,
+    hasVercelAiGateway: false,
+  })
+  spyOn(configManager, "isOpenCodeInstalled").mockResolvedValue(true)
+  spyOn(configManager, "getOpenCodeVersion").mockResolvedValue("1.4.0")
+  spyOn(configManager, "addPluginToOpenCodeConfig").mockResolvedValue({
+    success: true,
+    configPath: "/tmp/opencode.jsonc",
+  })
+  spyOn(configManager, "writeOmoConfig").mockReturnValue({
+    success: true,
+    configPath: "/tmp/oh-my-opencode.jsonc",
+  })
+}
+
+describe("runCliInstaller platform branching", () => {
+  const consoleLog = console.log
+
+  beforeEach(() => {
+    console.log = mock(() => {})
+  })
+
+  afterEach(() => {
+    console.log = consoleLog
+    mock.restore()
+  })
+
+  test("runs only OpenCode installation for platform=opencode", async () => {
+    // given
+    stubOpenCodeSuccess()
+    const codexSpy = spyOn(codexInstaller, "runCodexInstaller").mockResolvedValue(codexResult)
+    const writeSpy = spyOn(configManager, "writeOmoConfig")
+
+    // when
+    const result = await runCliInstaller(createOpenCodeArgs("opencode"), "3.4.0")
+
+    // then
+    expect(result).toBe(0)
+    expect(writeSpy).toHaveBeenCalledTimes(1)
+    expect(codexSpy).not.toHaveBeenCalled()
+  })
+
+  test("runs only Codex installation and skips OpenCode version checks for platform=codex", async () => {
+    // given
+    const versionSpy = spyOn(configManager, "getOpenCodeVersion")
+    const writeSpy = spyOn(configManager, "writeOmoConfig")
+    const codexSpy = spyOn(codexInstaller, "runCodexInstaller").mockResolvedValue(codexResult)
+
+    // when
+    const result = await runCliInstaller({ tui: false, platform: "codex" }, "3.4.0")
+
+    // then
+    expect(result).toBe(0)
+    expect(versionSpy).not.toHaveBeenCalled()
+    expect(writeSpy).not.toHaveBeenCalled()
+    expect(codexSpy).toHaveBeenCalledTimes(1)
+  })
+
+  test("runs OpenCode and Codex installation for platform=both", async () => {
+    // given
+    stubOpenCodeSuccess()
+    const codexSpy = spyOn(codexInstaller, "runCodexInstaller").mockResolvedValue(codexResult)
+    const writeSpy = spyOn(configManager, "writeOmoConfig")
+
+    // when
+    const result = await runCliInstaller(createOpenCodeArgs("both"), "3.4.0")
+
+    // then
+    expect(result).toBe(0)
+    expect(writeSpy).toHaveBeenCalledTimes(1)
+    expect(codexSpy).toHaveBeenCalledTimes(1)
+  })
+
+  test("fails when Codex-only installation cannot install Codex", async () => {
+    // given
+    spyOn(codexInstaller, "runCodexInstaller").mockRejectedValue(new Error("codex failed"))
+
+    // when
+    const result = await runCliInstaller({ tui: false, platform: "codex" }, "3.4.0")
+
+    // then
+    expect(result).toBe(1)
+  })
+
+  test("keeps OpenCode success when Codex fails for platform=both", async () => {
+    // given
+    stubOpenCodeSuccess()
+    spyOn(codexInstaller, "runCodexInstaller").mockRejectedValue(new Error("codex failed"))
+
+    // when
+    const result = await runCliInstaller(createOpenCodeArgs("both"), "3.4.0")
+
+    // then
+    expect(result).toBe(0)
+  })
+})
@@ -1,5 +1,6 @@
 import { afterEach, beforeEach, describe, expect, it, mock, spyOn } from "bun:test"
 import * as configManager from "./config-manager"
+import * as codexInstaller from "./install-codex"
 import { runCliInstaller } from "./cli-installer"
 import type { InstallArgs } from "./types"

@@ -47,6 +48,7 @@ describe("runCliInstaller", () => {

    const args: InstallArgs = {
      tui: false,
+      platform: "opencode",
      claude: "no",
      openai: "no",
      gemini: "no",
@@ -102,6 +104,7 @@ describe("runCliInstaller", () => {

    const args: InstallArgs = {
      tui: false,
+      platform: "opencode",
      claude: "no",
      openai: "yes",
      gemini: "no",
@@ -122,4 +125,43 @@ describe("runCliInstaller", () => {
      spy.mockRestore()
    }
  })
+
+  it("skips OpenCode checks and writes for platform=codex", async () => {
+    // given
+    const detectSpy = spyOn(configManager, "detectCurrentConfig")
+    const installedSpy = spyOn(configManager, "isOpenCodeInstalled")
+    const versionSpy = spyOn(configManager, "getOpenCodeVersion")
+    const addPluginSpy = spyOn(configManager, "addPluginToOpenCodeConfig")
+    const writeConfigSpy = spyOn(configManager, "writeOmoConfig")
+
+    const codexSpy = spyOn(codexInstaller, "runCodexInstaller").mockResolvedValue({
+      installed: [],
+      configPath: "/tmp/codex-config.toml",
+      codexHome: "/tmp/codex-home",
+      marketplaceName: "code-yeongyu-codex-plugins",
+    })
+
+    const args: InstallArgs = {
+      tui: false,
+      platform: "codex",
+    }
+
+    // when
+    const result = await runCliInstaller(args, "3.4.0")
+
+    // then
+    expect(result).toBe(0)
+    expect(detectSpy).not.toHaveBeenCalled()
+    expect(installedSpy).not.toHaveBeenCalled()
+    expect(versionSpy).not.toHaveBeenCalled()
+    expect(addPluginSpy).not.toHaveBeenCalled()
+    expect(writeConfigSpy).not.toHaveBeenCalled()
+
+    detectSpy.mockRestore()
+    installedSpy.mockRestore()
+    versionSpy.mockRestore()
+    addPluginSpy.mockRestore()
+    writeConfigSpy.mockRestore()
+    codexSpy.mockRestore()
+  })
 })
@@ -41,29 +41,49 @@ export async function runCliInstaller(args: InstallArgs, version: string): Promi
    return 1
  }

-  const detected = detectCurrentConfig()
-  const isUpdate = detected.isInstalled
+  const config = argsToConfig(args)
+  const hasOpenCode = config.hasOpenCode
+  const detected = hasOpenCode
+    ? detectCurrentConfig()
+    : {
+        isInstalled: false,
+        installedVersion: null,
+        hasClaude: false,
+        isMax20: false,
+        hasOpenAI: false,
+        hasGemini: false,
+        hasCopilot: false,
+        hasCodex: false,
+        hasOpencodeZen: false,
+        hasZaiCodingPlan: false,
+        hasKimiForCoding: false,
+        hasOpencodeGo: false,
+        hasVercelAiGateway: false,
+      }
+  const isUpdate = hasOpenCode && detected.isInstalled

  printHeader(isUpdate)

-  const totalSteps = 4
+  const totalSteps = hasOpenCode ? 4 : 2
  let step = 1

-  printStep(step++, totalSteps, "Checking OpenCode installation...")
-  const installed = await isOpenCodeInstalled()
-  const openCodeVersion = await getOpenCodeVersion()
-  if (!installed) {
-    printWarning(
-      "OpenCode binary not found. Plugin will be configured, but you'll need to install OpenCode to use it.",
-    )
-    printInfo("Visit https://opencode.ai/docs for installation instructions")
-  } else {
-    printSuccess(`OpenCode ${openCodeVersion ?? ""} detected`)
+  if (hasOpenCode) {
+    printStep(step++, totalSteps, "Checking OpenCode installation...")
+    const installed = await isOpenCodeInstalled()
+    const openCodeVersion = await getOpenCodeVersion()
+    if (!installed) {
+      printWarning(
+        "OpenCode binary not found. Plugin will be configured, but you'll need to install OpenCode to use it.",
+      )
+      printInfo("Visit https://opencode.ai/docs for installation instructions")
+    } else {
+      printSuccess(`OpenCode ${openCodeVersion ?? ""} detected`)

-    const unsupportedVersionMessage = getUnsupportedOpenCodeVersionMessage(openCodeVersion)
-    if (unsupportedVersionMessage) {
-      printWarning(unsupportedVersionMessage)
-      return 1
+      const unsupportedVersionMessage = getUnsupportedOpenCodeVersionMessage(openCodeVersion)
+      if (unsupportedVersionMessage) {
+        printWarning(unsupportedVersionMessage)
+        return 1
+      }
    }
  }

@@ -72,25 +92,25 @@ export async function runCliInstaller(args: InstallArgs, version: string): Promi
    printInfo(`Current config: Claude=${initial.claude}, Gemini=${initial.gemini}`)
  }

-  const config = argsToConfig(args)
+  if (hasOpenCode) {
+    printStep(step++, totalSteps, `Adding ${PLUGIN_NAME} plugin...`)
+    const pluginResult = await addPluginToOpenCodeConfig(version)
+    if (!pluginResult.success) {
+      printError(`Failed: ${pluginResult.error}`)
+      return 1
+    }
+    printSuccess(
+      `Plugin ${isUpdate ? "verified" : "added"} ${SYMBOLS.arrow} ${color.dim(pluginResult.configPath)}`,
+    )

-  printStep(step++, totalSteps, `Adding ${PLUGIN_NAME} plugin...`)
-  const pluginResult = await addPluginToOpenCodeConfig(version)
-  if (!pluginResult.success) {
-    printError(`Failed: ${pluginResult.error}`)
-    return 1
+    printStep(step++, totalSteps, `Writing ${PLUGIN_NAME} configuration...`)
+    const omoResult = writeOmoConfig(config)
+    if (!omoResult.success) {
+      printError(`Failed: ${omoResult.error}`)
+      return 1
+    }
+    printSuccess(`Config written ${SYMBOLS.arrow} ${color.dim(omoResult.configPath)}`)
  }
-  printSuccess(
-    `Plugin ${isUpdate ? "verified" : "added"} ${SYMBOLS.arrow} ${color.dim(pluginResult.configPath)}`,
-  )
-
-  printStep(step++, totalSteps, `Writing ${PLUGIN_NAME} 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")

@@ -113,7 +133,9 @@ export async function runCliInstaller(args: InstallArgs, version: string): Promi
  }

  console.log(`${SYMBOLS.star} ${color.bold(color.green(isUpdate ? "Configuration updated!" : "Installation complete!"))}`)
-  console.log(`  Run ${color.cyan("opencode")} to start!`)
+  if (hasOpenCode) {
+    console.log(`  Run ${color.cyan("opencode")} to start!`)
+  }
  console.log()

  if (config.hasCodex) {
@@ -123,6 +145,10 @@ export async function runCliInstaller(args: InstallArgs, version: string): Promi
      printSuccess(`Codex plugin installed ${SYMBOLS.arrow} ${color.dim(codexResult.configPath)}`)
    } catch (error) {
      const message = error instanceof Error ? error.message : String(error)
+      if (!config.hasOpenCode) {
+        printError(`Codex install failed: ${message}`)
+        return 1
+      }
      printWarning(`Codex install failed (OpenCode install is still complete): ${message}`)
    }
    console.log()
@@ -149,7 +175,7 @@ export async function runCliInstaller(args: InstallArgs, version: string): Promi
  console.log(color.dim("oMoMoMoMo... Enjoy!"))
  console.log()

-  if ((config.hasClaude || config.hasGemini || config.hasCopilot) && !args.skipAuth) {
+  if (hasOpenCode && (config.hasClaude || config.hasGemini || config.hasCopilot) && !args.skipAuth) {
    printBox(
      `Run ${color.cyan("opencode auth login")} and select your provider:\n` +
        (config.hasClaude ? `  ${SYMBOLS.bullet} Anthropic ${color.gray("→ Claude Pro/Max")}\n` : "") +
@@ -1,4 +1,4 @@
-import { Command } from "commander"
+import { Command, Option } from "commander"
 import { install } from "./install"
 import { run } from "./run"
 import { getLocalVersion } from "./get-local-version"
@@ -22,7 +22,7 @@ type InstallCommandOptions = {
  readonly openai?: InstallArgs["openai"]
  readonly gemini?: InstallArgs["gemini"]
  readonly copilot?: InstallArgs["copilot"]
-  readonly codex?: InstallArgs["codex"]
+  readonly platform?: InstallArgs["platform"]
  readonly opencodeZen?: InstallArgs["opencodeZen"]
  readonly zaiCodingPlan?: InstallArgs["zaiCodingPlan"]
  readonly kimiForCoding?: InstallArgs["kimiForCoding"]
@@ -41,7 +41,7 @@ export function resolveInstallArgs(
    openai: options.openai,
    gemini: options.gemini,
    copilot: options.copilot,
-    codex: options.codex ?? (invocationName === "lazycodex" ? "yes" : undefined),
+    platform: options.platform ?? (invocationName === "lazycodex" ? "codex" : undefined),
    opencodeZen: options.opencodeZen,
    zaiCodingPlan: options.zaiCodingPlan,
    kimiForCoding: options.kimiForCoding,
@@ -67,7 +67,7 @@ program
  .option("--openai <value>", "OpenAI/ChatGPT subscription: no, yes (default: no)")
  .option("--gemini <value>", "Gemini integration: no, yes")
  .option("--copilot <value>", "GitHub Copilot subscription: no, yes")
-  .option("--codex <value>", "Install Codex harness adapter: no, yes (default: no)")
+  .addOption(new Option("--platform <platform>", "Install target platform: opencode, codex, both").choices(["opencode", "codex", "both"]))
  .option("--opencode-zen <value>", "OpenCode Zen access: no, yes (default: no)")
  .option("--zai-coding-plan <value>", "Z.ai Coding Plan subscription: no, yes (default: no)")
  .option("--kimi-for-coding <value>", "Kimi For Coding subscription: no, yes (default: no)")
@@ -77,9 +77,9 @@ program
 .addHelpText("after", `
 Examples:
  $ bunx oh-my-opencode install
-  $ bunx lazycodex install --no-tui --claude=yes --gemini=no --copilot=no
-  $ bunx oh-my-opencode install --no-tui --claude=max20 --openai=yes --gemini=yes --copilot=no --codex=yes
-  $ omo install --codex=yes
+  $ bunx lazycodex install --no-tui
+  $ bunx oh-my-opencode install --no-tui --platform=both --claude=max20 --openai=yes --gemini=yes --copilot=no
+  $ omo install --platform=codex
  $ bunx oh-my-opencode install --no-tui --claude=no --gemini=no --copilot=yes --opencode-zen=yes

 Model Providers (Priority: Native > Copilot > OpenCode Zen > Z.ai > Kimi > Vercel):
@@ -16,7 +16,7 @@ describe("lazycodex install routing", () => {
    process.env.OMO_INVOCATION_NAME = originalInvocationName
  })

-  test("defaults codex to yes when invoked as lazycodex and user did not pass --codex", () => {
+  test("defaults platform to codex when invoked as lazycodex without --platform", () => {
    // given
    process.env.OMO_INVOCATION_NAME = "lazycodex"

@@ -30,11 +30,12 @@ describe("lazycodex install routing", () => {
    const config = argsToConfig(args)

    // then
-    expect(args.codex).toBe("yes")
+    expect(args.platform).toBe("codex")
    expect(config.hasCodex).toBe(true)
+    expect(config.hasOpenCode).toBe(false)
  })

-  test("respects explicit --codex=no when invoked as lazycodex", () => {
+  test("respects explicit --platform=both when invoked as lazycodex", () => {
    // given
    process.env.OMO_INVOCATION_NAME = "lazycodex"

@@ -44,16 +45,17 @@ describe("lazycodex install routing", () => {
      claude: "no",
      gemini: "no",
      copilot: "no",
-      codex: "no",
+      platform: "both",
    })
    const config = argsToConfig(args)

    // then
-    expect(args.codex).toBe("no")
-    expect(config.hasCodex).toBe(false)
+    expect(args.platform).toBe("both")
+    expect(config.hasCodex).toBe(true)
+    expect(config.hasOpenCode).toBe(true)
  })

-  test("keeps codex disabled by default when invocation name is oh-my-opencode", () => {
+  test("leaves omo install unresolved so argsToConfig applies opencode default", () => {
    // given
    process.env.OMO_INVOCATION_NAME = "oh-my-opencode"

@@ -67,11 +69,12 @@ describe("lazycodex install routing", () => {
    const config = argsToConfig(args)

    // then
-    expect(args.codex).toBeUndefined()
+    expect(args.platform).toBeUndefined()
    expect(config.hasCodex).toBe(false)
+    expect(config.hasOpenCode).toBe(true)
  })

-  test("keeps codex disabled by default when invocation name is unset", () => {
+  test("leaves unset invocation unresolved so argsToConfig applies opencode default", () => {
    // given
    delete process.env.OMO_INVOCATION_NAME

@@ -88,7 +91,8 @@ describe("lazycodex install routing", () => {
    const config = argsToConfig(args)

    // then
-    expect(args.codex).toBeUndefined()
+    expect(args.platform).toBeUndefined()
    expect(config.hasCodex).toBe(false)
+    expect(config.hasOpenCode).toBe(true)
  })
 })
@@ -0,0 +1,98 @@
+/// <reference types="bun-types" />
+
+import { describe, expect, test } from "bun:test"
+import { readFile } from "node:fs/promises"
+import path from "node:path"
+import { resolveInstallArgs } from "./cli-program"
+
+describe("install platform resolution", () => {
+  test("leaves omo install without --platform unresolved for config defaults", () => {
+    // given
+    const invocationName = "omo"
+
+    // when
+    const args = resolveInstallArgs({ tui: true }, invocationName)
+
+    // then
+    expect(args.platform).toBeUndefined()
+  })
+
+  test("resolves explicit --platform=codex", () => {
+    // given
+    const invocationName = "omo"
+
+    // when
+    const args = resolveInstallArgs({ tui: true, platform: "codex" }, invocationName)
+
+    // then
+    expect(args.platform).toBe("codex")
+  })
+
+  test("resolves explicit --platform=both", () => {
+    // given
+    const invocationName = "omo"
+
+    // when
+    const args = resolveInstallArgs({ tui: true, platform: "both" }, invocationName)
+
+    // then
+    expect(args.platform).toBe("both")
+  })
+
+  test("resolves explicit --platform=opencode", () => {
+    // given
+    const invocationName = "omo"
+
+    // when
+    const args = resolveInstallArgs({ tui: true, platform: "opencode" }, invocationName)
+
+    // then
+    expect(args.platform).toBe("opencode")
+  })
+
+  test("defaults lazycodex install to codex platform", () => {
+    // given
+    const invocationName = "lazycodex"
+
+    // when
+    const args = resolveInstallArgs({ tui: true }, invocationName)
+
+    // then
+    expect(args.platform).toBe("codex")
+  })
+
+  test("lets lazycodex install explicitly override to both", () => {
+    // given
+    const invocationName = "lazycodex"
+
+    // when
+    const args = resolveInstallArgs({ tui: true, platform: "both" }, invocationName)
+
+    // then
+    expect(args.platform).toBe("both")
+  })
+
+  test("lets lazycodex install explicitly override to opencode", () => {
+    // given
+    const invocationName = "lazycodex"
+
+    // when
+    const args = resolveInstallArgs({ tui: true, platform: "opencode" }, invocationName)
+
+    // then
+    expect(args.platform).toBe("opencode")
+  })
+
+  test("defines Commander choices so invalid --platform values are rejected", async () => {
+    // given
+    const cliProgramSource = await readFile(path.resolve(import.meta.dir, "cli-program.ts"), "utf-8")
+
+    // when
+    const installBlock = cliProgramSource.match(/program\s*\n\s*\.command\("install"\)([\s\S]*?)\.action\(/)
+
+    // then
+    expect(installBlock).not.toBeNull()
+    expect(installBlock?.[1]).toContain('new Option("--platform <platform>"')
+    expect(installBlock?.[1]).toContain('.choices(["opencode", "codex", "both"])')
+  })
+})
@@ -1,6 +1,8 @@
+/// <reference types="bun-types" />
+
 import { describe, expect, test } from "bun:test"

-import { validateNonTuiArgs } from "./install-validators"
+import { argsToConfig, formatConfigSummary, validateNonTuiArgs } from "./install-validators"
 import type { InstallArgs } from "./types"

 function createArgs(overrides: Partial<InstallArgs> = {}): InstallArgs {
@@ -10,16 +12,70 @@ function createArgs(overrides: Partial<InstallArgs> = {}): InstallArgs {
    openai: "no",
    gemini: "no",
    copilot: "no",
-    codex: "no",
    opencodeZen: "no",
    zaiCodingPlan: "no",
    kimiForCoding: "no",
    opencodeGo: "no",
+    vercelAiGateway: "no",
    skipAuth: false,
    ...overrides,
  }
 }

+describe("argsToConfig", () => {
+  test("enables only OpenCode when platform is opencode", () => {
+    // #given
+    const args = createArgs({ platform: "opencode" })
+
+    // #when
+    const config = argsToConfig(args)
+
+    // #then
+    expect(config.platform).toBe("opencode")
+    expect(config.hasOpenCode).toBe(true)
+    expect(config.hasCodex).toBe(false)
+  })
+
+  test("enables only Codex when platform is codex", () => {
+    // #given
+    const args = createArgs({ platform: "codex" })
+
+    // #when
+    const config = argsToConfig(args)
+
+    // #then
+    expect(config.platform).toBe("codex")
+    expect(config.hasOpenCode).toBe(false)
+    expect(config.hasCodex).toBe(true)
+  })
+
+  test("enables both harnesses when platform is both", () => {
+    // #given
+    const args = createArgs({ platform: "both" })
+
+    // #when
+    const config = argsToConfig(args)
+
+    // #then
+    expect(config.platform).toBe("both")
+    expect(config.hasOpenCode).toBe(true)
+    expect(config.hasCodex).toBe(true)
+  })
+
+  test("defaults to OpenCode when platform is omitted", () => {
+    // #given
+    const args = createArgs()
+
+    // #when
+    const config = argsToConfig(args)
+
+    // #then
+    expect(config.platform).toBe("opencode")
+    expect(config.hasOpenCode).toBe(true)
+    expect(config.hasCodex).toBe(false)
+  })
+})
+
 describe("validateNonTuiArgs", () => {
  test("rejects invalid --opencode-go values", () => {
    // #given
@@ -32,4 +88,70 @@ describe("validateNonTuiArgs", () => {
    expect(result.valid).toBe(false)
    expect(result.errors).toContain("Invalid --opencode-go value: maybe (expected: no, yes)")
  })
+
+  test("requires OpenCode provider flags when platform is opencode", () => {
+    // #given
+    const args = createArgs({ platform: "opencode", claude: undefined, gemini: undefined, copilot: undefined })
+
+    // #when
+    const result = validateNonTuiArgs(args)
+
+    // #then
+    expect(result.valid).toBe(false)
+    expect(result.errors).toContain("--claude is required (values: no, yes, max20)")
+    expect(result.errors).toContain("--gemini is required (values: no, yes)")
+    expect(result.errors).toContain("--copilot is required (values: no, yes)")
+  })
+
+  test("requires OpenCode provider flags when platform is both", () => {
+    // #given
+    const args = createArgs({ platform: "both", claude: undefined, gemini: undefined, copilot: undefined })
+
+    // #when
+    const result = validateNonTuiArgs(args)
+
+    // #then
+    expect(result.valid).toBe(false)
+    expect(result.errors).toContain("--claude is required (values: no, yes, max20)")
+    expect(result.errors).toContain("--gemini is required (values: no, yes)")
+    expect(result.errors).toContain("--copilot is required (values: no, yes)")
+  })
+
+  test("allows codex-only non-TUI installs without OpenCode provider flags", () => {
+    // #given
+    const args: InstallArgs = { tui: false, platform: "codex" }
+
+    // #when
+    const result = validateNonTuiArgs(args)
+
+    // #then
+    expect(result.valid).toBe(true)
+    expect(result.errors).toEqual([])
+  })
+
+  test("rejects OpenCode flags for codex-only non-TUI installs", () => {
+    // #given
+    const args = createArgs({ platform: "codex", claude: "yes" })
+
+    // #when
+    const result = validateNonTuiArgs(args)
+
+    // #then
+    expect(result.valid).toBe(false)
+    expect(result.errors).toContain("--claude cannot be used with --platform=codex")
+  })
+})
+
+describe("formatConfigSummary", () => {
+  test("shows platform instead of a separate Codex Harness provider line", () => {
+    // #given
+    const config = argsToConfig(createArgs({ platform: "both" }))
+
+    // #when
+    const summary = formatConfigSummary(config)
+
+    // #then
+    expect(summary).toContain("Platform: both")
+    expect(summary).not.toContain("Codex Harness")
+  })
 })
@@ -5,6 +5,7 @@ import type {
  DetectedConfig,
  InstallArgs,
  InstallConfig,
+  InstallPlatform,
 } from "./types"

 export const SYMBOLS = {
@@ -31,13 +32,14 @@ export function formatConfigSummary(config: InstallConfig): string {

  lines.push(color.bold(color.white("Configuration Summary")))
  lines.push("")
+  lines.push(`  ${SYMBOLS.info} Platform: ${config.platform}`)
+  lines.push("")

  const claudeDetail = config.hasClaude ? (config.isMax20 ? "max20" : "standard") : undefined
  lines.push(formatProvider("Claude", config.hasClaude, claudeDetail))
  lines.push(formatProvider("OpenAI/ChatGPT", config.hasOpenAI, "GPT-5.4 for Oracle"))
  lines.push(formatProvider("Gemini", config.hasGemini))
  lines.push(formatProvider("GitHub Copilot", config.hasCopilot, "fallback"))
-  lines.push(formatProvider("Codex Harness (oh-my-codex plugin)", config.hasCodex))
  lines.push(formatProvider("OpenCode Zen", config.hasOpencodeZen, "opencode/ models"))
  lines.push(formatProvider("Z.ai Coding Plan", config.hasZaiCodingPlan, "Librarian/Multimodal"))
  lines.push(formatProvider("Kimi For Coding", config.hasKimiForCoding, "Sisyphus/Prometheus fallback"))
@@ -116,29 +118,28 @@ export function printBox(content: string, title?: string): void {

 export function validateNonTuiArgs(args: InstallArgs): { valid: boolean; errors: string[] } {
  const errors: string[] = []
+  const platform = resolvePlatform(args)
+  const hasOpenCode = platform === "opencode" || platform === "both"
+  const hasCodexOnly = platform === "codex"

-  if (args.claude === undefined) {
+  if (hasOpenCode && args.claude === undefined) {
    errors.push("--claude is required (values: no, yes, max20)")
-  } else if (!["no", "yes", "max20"].includes(args.claude)) {
+  } else if (args.claude !== undefined && !["no", "yes", "max20"].includes(args.claude)) {
    errors.push(`Invalid --claude value: ${args.claude} (expected: no, yes, max20)`)
  }

-  if (args.gemini === undefined) {
+  if (hasOpenCode && args.gemini === undefined) {
    errors.push("--gemini is required (values: no, yes)")
-  } else if (!["no", "yes"].includes(args.gemini)) {
+  } else if (args.gemini !== undefined && !["no", "yes"].includes(args.gemini)) {
    errors.push(`Invalid --gemini value: ${args.gemini} (expected: no, yes)`)
  }

-  if (args.copilot === undefined) {
+  if (hasOpenCode && args.copilot === undefined) {
    errors.push("--copilot is required (values: no, yes)")
-  } else if (!["no", "yes"].includes(args.copilot)) {
+  } else if (args.copilot !== undefined && !["no", "yes"].includes(args.copilot)) {
    errors.push(`Invalid --copilot value: ${args.copilot} (expected: no, yes)`)
  }

-  if (args.codex !== undefined && !["no", "yes"].includes(args.codex)) {
-    errors.push(`Invalid --codex value: ${args.codex} (expected: no, yes)`)
-  }
-
  if (args.openai !== undefined && !["no", "yes"].includes(args.openai)) {
    errors.push(`Invalid --openai value: ${args.openai} (expected: no, yes)`)
  }
@@ -163,22 +164,51 @@ export function validateNonTuiArgs(args: InstallArgs): { valid: boolean; errors:
    errors.push(`Invalid --vercel-ai-gateway value: ${args.vercelAiGateway} (expected: no, yes)`)
  }

+  if (hasCodexOnly) {
+    const opencodeFlagErrors = collectCodexOnlyOpenCodeFlagErrors(args)
+    errors.push(...opencodeFlagErrors)
+  }
+
  return { valid: errors.length === 0, errors }
 }

+function resolvePlatform(args: InstallArgs): InstallPlatform {
+  return args.platform ?? "opencode"
+}
+
+function collectCodexOnlyOpenCodeFlagErrors(args: InstallArgs): string[] {
+  const errors: string[] = []
+  if (args.claude !== undefined) errors.push("--claude cannot be used with --platform=codex")
+  if (args.openai !== undefined) errors.push("--openai cannot be used with --platform=codex")
+  if (args.gemini !== undefined) errors.push("--gemini cannot be used with --platform=codex")
+  if (args.copilot !== undefined) errors.push("--copilot cannot be used with --platform=codex")
+  if (args.opencodeZen !== undefined) errors.push("--opencode-zen cannot be used with --platform=codex")
+  if (args.zaiCodingPlan !== undefined) errors.push("--zai-coding-plan cannot be used with --platform=codex")
+  if (args.kimiForCoding !== undefined) errors.push("--kimi-for-coding cannot be used with --platform=codex")
+  if (args.opencodeGo !== undefined) errors.push("--opencode-go cannot be used with --platform=codex")
+  if (args.vercelAiGateway !== undefined) errors.push("--vercel-ai-gateway cannot be used with --platform=codex")
+  return errors
+}
+
 export function argsToConfig(args: InstallArgs): InstallConfig {
+  const platform = resolvePlatform(args)
+  const hasOpenCode = platform === "opencode" || platform === "both"
+  const hasCodex = platform === "codex" || platform === "both"
+
  return {
-    hasClaude: args.claude !== "no",
+    platform,
+    hasOpenCode,
+    hasClaude: hasOpenCode && args.claude !== "no",
    isMax20: args.claude === "max20",
-    hasOpenAI: args.openai === "yes",
-    hasGemini: args.gemini === "yes",
-    hasCopilot: args.copilot === "yes",
-    hasCodex: args.codex === "yes",
-    hasOpencodeZen: args.opencodeZen === "yes",
-    hasZaiCodingPlan: args.zaiCodingPlan === "yes",
-    hasKimiForCoding: args.kimiForCoding === "yes",
-    hasOpencodeGo: args.opencodeGo === "yes",
-    hasVercelAiGateway: args.vercelAiGateway === "yes",
+    hasOpenAI: hasOpenCode && args.openai === "yes",
+    hasGemini: hasOpenCode && args.gemini === "yes",
+    hasCopilot: hasOpenCode && args.copilot === "yes",
+    hasCodex,
+    hasOpencodeZen: hasOpenCode && args.opencodeZen === "yes",
+    hasZaiCodingPlan: hasOpenCode && args.zaiCodingPlan === "yes",
+    hasKimiForCoding: hasOpenCode && args.kimiForCoding === "yes",
+    hasOpencodeGo: hasOpenCode && args.opencodeGo === "yes",
+    hasVercelAiGateway: hasOpenCode && args.vercelAiGateway === "yes",
  }
 }

@@ -187,7 +217,6 @@ export function detectedToInitialValues(detected: DetectedConfig): {
  openai: BooleanArg
  gemini: BooleanArg
  copilot: BooleanArg
-  codex: BooleanArg
  opencodeZen: BooleanArg
  zaiCodingPlan: BooleanArg
  kimiForCoding: BooleanArg
@@ -204,7 +233,6 @@ export function detectedToInitialValues(detected: DetectedConfig): {
    openai: detected.hasOpenAI ? "yes" : "no",
    gemini: detected.hasGemini ? "yes" : "no",
    copilot: detected.hasCopilot ? "yes" : "no",
-    codex: detected.hasCodex ? "yes" : "no",
    opencodeZen: detected.hasOpencodeZen ? "yes" : "no",
    zaiCodingPlan: detected.hasZaiCodingPlan ? "yes" : "no",
    kimiForCoding: detected.hasKimiForCoding ? "yes" : "no",
@@ -0,0 +1,123 @@
+/// <reference types="bun-types" />
+
+import { afterEach, beforeEach, describe, expect, mock, spyOn, test } from "bun:test"
+import * as p from "@clack/prompts"
+import * as prompts from "./tui-install-prompts"
+import type { DetectedConfig, InstallConfig, InstallPlatform } from "./types"
+
+function createDetectedConfig(): DetectedConfig {
+  return {
+    isInstalled: false,
+    installedVersion: null,
+    hasClaude: false,
+    isMax20: false,
+    hasOpenAI: false,
+    hasGemini: false,
+    hasCopilot: false,
+    hasCodex: false,
+    hasOpencodeZen: false,
+    hasZaiCodingPlan: false,
+    hasKimiForCoding: false,
+    hasOpencodeGo: false,
+    hasVercelAiGateway: false,
+  }
+}
+
+function withTty(): () => void {
+  const originalIsStdinTty = process.stdin.isTTY
+  const originalIsStdoutTty = process.stdout.isTTY
+  Object.defineProperty(process.stdin, "isTTY", { configurable: true, value: true })
+  Object.defineProperty(process.stdout, "isTTY", { configurable: true, value: true })
+  return () => {
+    Object.defineProperty(process.stdin, "isTTY", { configurable: true, value: originalIsStdinTty })
+    Object.defineProperty(process.stdout, "isTTY", { configurable: true, value: originalIsStdoutTty })
+  }
+}
+
+describe("promptInstallPlatform", () => {
+  let restoreTty: () => void
+
+  beforeEach(() => {
+    restoreTty = withTty()
+  })
+
+  afterEach(() => {
+    restoreTty()
+    mock.restore()
+  })
+
+  test("offers OpenCode, Codex, and Both choices with OpenCode as the default", async () => {
+    // given
+    const selectSpy = spyOn(p, "select").mockResolvedValue("opencode")
+
+    // when
+    const value = await prompts.promptInstallPlatform()
+
+    // then
+    expect(value).toBe("opencode")
+    expect(selectSpy).toHaveBeenCalledTimes(1)
+    expect(selectSpy.mock.calls[0]?.[0]).toMatchObject({
+      initialValue: "opencode",
+      options: [
+        { value: "opencode" },
+        { value: "codex" },
+        { value: "both" },
+      ],
+    })
+  })
+})
+
+describe("promptInstallConfig platform branching", () => {
+  let restoreTty: () => void
+
+  beforeEach(() => {
+    restoreTty = withTty()
+  })
+
+  afterEach(() => {
+    restoreTty()
+    mock.restore()
+  })
+
+  test("skips OpenCode questions when the user selects codex", async () => {
+    // given
+    const selectSpy = spyOn(p, "select").mockResolvedValue("no")
+
+    // when
+    const config = await prompts.promptInstallConfig(createDetectedConfig(), "codex")
+
+    // then
+    expect(config).toMatchObject({ platform: "codex", hasOpenCode: false, hasCodex: true } satisfies Partial<InstallConfig>)
+    expect(selectSpy).not.toHaveBeenCalled()
+  })
+
+  test.each([
+    ["opencode", false],
+    ["both", true],
+  ] satisfies readonly [InstallPlatform, boolean][])(
+    "asks OpenCode questions when the user selects %s",
+    async (platform, hasCodex) => {
+      // given
+      const selectSpy = spyOn(p, "select").mockResolvedValue("no")
+
+      // when
+      const config = await prompts.promptInstallConfig(createDetectedConfig(), platform)
+
+      // then
+      expect(config).toMatchObject({ platform, hasOpenCode: true, hasCodex } satisfies Partial<InstallConfig>)
+      expect(selectSpy).toHaveBeenCalledTimes(9)
+    },
+  )
+
+  test("does not ask the old Codex adapter question", async () => {
+    // given
+    const selectSpy = spyOn(p, "select").mockResolvedValue("no")
+
+    // when
+    await prompts.promptInstallConfig(createDetectedConfig(), "both")
+
+    // then
+    const messages = selectSpy.mock.calls.map((call) => call[0].message)
+    expect(messages).not.toContain("Install Codex harness adapter into ~/.codex?")
+  })
+})
@@ -4,6 +4,7 @@ import type {
  ClaudeSubscription,
  DetectedConfig,
  InstallConfig,
+  InstallPlatform,
 } from "./types"
 import { detectedToInitialValues } from "./install-validators"

@@ -26,7 +27,45 @@ async function selectOrCancel<TValue extends Readonly<string | boolean | number>
  return value as TValue
 }

-export async function promptInstallConfig(detected: DetectedConfig): Promise<InstallConfig | null> {
+export async function promptInstallPlatform(
+  initialValue: InstallPlatform = "opencode",
+): Promise<InstallPlatform | null> {
+  return selectOrCancel<InstallPlatform>({
+    message: "Which platform do you want to install?",
+    options: [
+      { value: "opencode", label: "OpenCode", hint: "Install OpenCode plugin only" },
+      { value: "codex", label: "Codex", hint: "Install Codex harness adapter only" },
+      { value: "both", label: "Both", hint: "Install OpenCode plugin and Codex adapter" },
+    ],
+    initialValue,
+  })
+}
+
+export async function promptInstallConfig(
+  detected: DetectedConfig,
+  platform: InstallPlatform,
+): Promise<InstallConfig | null> {
+  const hasOpenCode = platform === "opencode" || platform === "both"
+  const hasCodex = platform === "codex" || platform === "both"
+
+  if (!hasOpenCode) {
+    return {
+      platform,
+      hasOpenCode: false,
+      hasClaude: false,
+      isMax20: false,
+      hasOpenAI: false,
+      hasGemini: false,
+      hasCopilot: false,
+      hasCodex,
+      hasOpencodeZen: false,
+      hasZaiCodingPlan: false,
+      hasKimiForCoding: false,
+      hasOpencodeGo: false,
+      hasVercelAiGateway: false,
+    }
+  }
+
  const initial = detectedToInitialValues(detected)

  const claude = await selectOrCancel<ClaudeSubscription>({
@@ -70,16 +109,6 @@ export async function promptInstallConfig(detected: DetectedConfig): Promise<Ins
  })
  if (!copilot) return null

-  const codex = await selectOrCancel({
-    message: "Install Codex harness adapter into ~/.codex?",
-    options: [
-      { value: "no", label: "No", hint: "Skip Codex plugin installation" },
-      { value: "yes", label: "Yes", hint: "Install vendored oh-my-codex plugin" },
-    ],
-    initialValue: initial.codex,
-  })
-  if (!codex) return null
-
  const opencodeZen = await selectOrCancel({
    message: "Do you have access to OpenCode Zen (opencode/ models)?",
    options: [
@@ -131,12 +160,14 @@ export async function promptInstallConfig(detected: DetectedConfig): Promise<Ins
  if (!vercelAiGateway) return null

  return {
+    platform,
+    hasOpenCode: true,
    hasClaude: claude !== "no",
    isMax20: claude === "max20",
    hasOpenAI: openai === "yes",
    hasGemini: gemini === "yes",
    hasCopilot: copilot === "yes",
-    hasCodex: codex === "yes",
+    hasCodex,
    hasOpencodeZen: opencodeZen === "yes",
    hasZaiCodingPlan: zaiCodingPlan === "yes",
    hasKimiForCoding: kimiForCoding === "yes",
@@ -9,6 +9,10 @@ function createMockSpinner(): ReturnType<typeof p.spinner> {
    start: () => undefined,
    stop: () => undefined,
    message: () => undefined,
+    cancel: () => undefined,
+    error: () => undefined,
+    clear: () => undefined,
+    isCancelled: false,
  }
 }

@@ -32,6 +36,7 @@ describe("runTuiInstaller", () => {
      spyOn(p, "spinner").mockReturnValue(createMockSpinner()),
      spyOn(p, "intro").mockImplementation(() => undefined),
      spyOn(p.log, "warn").mockImplementation(() => undefined),
+      spyOn(tuiInstallPrompts, "promptInstallPlatform").mockResolvedValue("opencode"),
      spyOn(configManager, "detectCurrentConfig").mockReturnValue({
        isInstalled: false,
        installedVersion: null,
@@ -82,6 +87,7 @@ describe("runTuiInstaller", () => {
      spyOn(p.log, "message").mockImplementation(() => undefined),
      spyOn(p, "note").mockImplementation(() => undefined),
      spyOn(p, "outro").mockImplementation(() => undefined),
+      spyOn(tuiInstallPrompts, "promptInstallPlatform").mockResolvedValue("opencode"),
      spyOn(configManager, "detectCurrentConfig").mockReturnValue({
        isInstalled: false,
        installedVersion: null,
@@ -100,6 +106,8 @@ describe("runTuiInstaller", () => {
      spyOn(configManager, "isOpenCodeInstalled").mockResolvedValue(true),
      spyOn(configManager, "getOpenCodeVersion").mockResolvedValue("1.4.0"),
      spyOn(tuiInstallPrompts, "promptInstallConfig").mockResolvedValue({
+        platform: "opencode",
+        hasOpenCode: true,
        hasClaude: false,
        isMax20: false,
        hasOpenAI: false,
@@ -132,4 +140,59 @@ describe("runTuiInstaller", () => {
      spy.mockRestore()
    }
  })
+
+  it("skips OpenCode checks and writes when platform is codex", async () => {
+    // given
+    const restoreSpies = [
+      spyOn(p, "spinner").mockReturnValue(createMockSpinner()),
+      spyOn(p, "intro").mockImplementation(() => undefined),
+      spyOn(p.log, "info").mockImplementation(() => undefined),
+      spyOn(p.log, "warn").mockImplementation(() => undefined),
+      spyOn(p.log, "success").mockImplementation(() => undefined),
+      spyOn(p.log, "message").mockImplementation(() => undefined),
+      spyOn(p, "note").mockImplementation(() => undefined),
+      spyOn(p, "outro").mockImplementation(() => undefined),
+      spyOn(tuiInstallPrompts, "promptInstallPlatform").mockResolvedValue("codex"),
+      spyOn(tuiInstallPrompts, "promptInstallConfig").mockResolvedValue({
+        platform: "codex",
+        hasOpenCode: false,
+        hasClaude: false,
+        isMax20: false,
+        hasOpenAI: false,
+        hasGemini: false,
+        hasCopilot: false,
+        hasCodex: false,
+        hasOpencodeZen: false,
+        hasZaiCodingPlan: false,
+        hasKimiForCoding: false,
+        hasOpencodeGo: false,
+        hasVercelAiGateway: false,
+      }),
+    ]
+    const detectConfigSpy = spyOn(configManager, "detectCurrentConfig")
+    const isInstalledSpy = spyOn(configManager, "isOpenCodeInstalled")
+    const getVersionSpy = spyOn(configManager, "getOpenCodeVersion")
+    const addPluginSpy = spyOn(configManager, "addPluginToOpenCodeConfig")
+    const writeConfigSpy = spyOn(configManager, "writeOmoConfig")
+
+    // when
+    const result = await runTuiInstaller({ tui: true, platform: "codex" }, "3.16.0")
+
+    // then
+    expect(result).toBe(0)
+    expect(detectConfigSpy).not.toHaveBeenCalled()
+    expect(isInstalledSpy).not.toHaveBeenCalled()
+    expect(getVersionSpy).not.toHaveBeenCalled()
+    expect(addPluginSpy).not.toHaveBeenCalled()
+    expect(writeConfigSpy).not.toHaveBeenCalled()
+
+    for (const spy of restoreSpies) {
+      spy.mockRestore()
+    }
+    detectConfigSpy.mockRestore()
+    isInstalledSpy.mockRestore()
+    getVersionSpy.mockRestore()
+    addPluginSpy.mockRestore()
+    writeConfigSpy.mockRestore()
+  })
 })
@@ -11,7 +11,7 @@ import {
 } from "./config-manager"
 import { detectedToInitialValues, formatConfigSummary, SYMBOLS } from "./install-validators"
 import { getUnsupportedOpenCodeVersionMessage } from "./minimum-opencode-version"
-import { promptInstallConfig } from "./tui-install-prompts"
+import { promptInstallConfig, promptInstallPlatform } from "./tui-install-prompts"
 import { runCodexInstaller } from "./install-codex"

 export async function runTuiInstaller(args: InstallArgs, version: string): Promise<number> {
@@ -20,8 +20,28 @@ export async function runTuiInstaller(args: InstallArgs, version: string): Promi
    return 1
  }

-  const detected = detectCurrentConfig()
-  const isUpdate = detected.isInstalled
+  const selectedPlatform = await promptInstallPlatform(args.platform ?? "opencode")
+  if (!selectedPlatform) return 1
+
+  const hasOpenCode = selectedPlatform === "opencode" || selectedPlatform === "both"
+  const detected = hasOpenCode
+    ? detectCurrentConfig()
+    : {
+        isInstalled: false,
+        installedVersion: null,
+        hasClaude: false,
+        isMax20: false,
+        hasOpenAI: false,
+        hasGemini: false,
+        hasCopilot: false,
+        hasCodex: false,
+        hasOpencodeZen: false,
+        hasZaiCodingPlan: false,
+        hasKimiForCoding: false,
+        hasOpencodeGo: false,
+        hasVercelAiGateway: false,
+      }
+  const isUpdate = hasOpenCode && detected.isInstalled

  p.intro(color.bgMagenta(color.white(isUpdate ? " oMoMoMoMo... Update " : " oMoMoMoMo... ")))

@@ -31,45 +51,49 @@ export async function runTuiInstaller(args: InstallArgs, version: string): Promi
  }

  const spinner = p.spinner()
-  spinner.start("Checking OpenCode installation")
+  if (hasOpenCode) {
+    spinner.start("Checking OpenCode installation")

-  const installed = await isOpenCodeInstalled()
-  const openCodeVersion = await getOpenCodeVersion()
-  if (!installed) {
-    spinner.stop(`OpenCode binary not found ${color.yellow("[!]")}`)
-    p.log.warn("OpenCode binary not found. Plugin will be configured, but you'll need to install OpenCode to use it.")
-    p.note("Visit https://opencode.ai/docs for installation instructions", "Installation Guide")
-  } else {
-    spinner.stop(`OpenCode ${openCodeVersion ?? "installed"} ${color.green("[OK]")}`)
+    const installed = await isOpenCodeInstalled()
+    const openCodeVersion = await getOpenCodeVersion()
+    if (!installed) {
+      spinner.stop(`OpenCode binary not found ${color.yellow("[!]")}`)
+      p.log.warn("OpenCode binary not found. Plugin will be configured, but you'll need to install OpenCode to use it.")
+      p.note("Visit https://opencode.ai/docs for installation instructions", "Installation Guide")
+    } else {
+      spinner.stop(`OpenCode ${openCodeVersion ?? "installed"} ${color.green("[OK]")}`)

-    const unsupportedVersionMessage = getUnsupportedOpenCodeVersionMessage(openCodeVersion)
-    if (unsupportedVersionMessage) {
-      p.log.warn(unsupportedVersionMessage)
-      p.outro(color.red("Installation blocked."))
-      return 1
+      const unsupportedVersionMessage = getUnsupportedOpenCodeVersionMessage(openCodeVersion)
+      if (unsupportedVersionMessage) {
+        p.log.warn(unsupportedVersionMessage)
+        p.outro(color.red("Installation blocked."))
+        return 1
+      }
    }
  }

-  const config = await promptInstallConfig(detected)
+  const config = await promptInstallConfig(detected, selectedPlatform)
  if (!config) return 1

-  spinner.start(`Adding ${PLUGIN_NAME} to OpenCode config`)
-  const pluginResult = await addPluginToOpenCodeConfig(version)
-  if (!pluginResult.success) {
-    spinner.stop(`Failed to add plugin: ${pluginResult.error}`)
-    p.outro(color.red("Installation failed."))
-    return 1
-  }
-  spinner.stop(`Plugin added to ${color.cyan(pluginResult.configPath)}`)
+  if (config.hasOpenCode) {
+    spinner.start(`Adding ${PLUGIN_NAME} to OpenCode config`)
+    const pluginResult = await addPluginToOpenCodeConfig(version)
+    if (!pluginResult.success) {
+      spinner.stop(`Failed to add plugin: ${pluginResult.error}`)
+      p.outro(color.red("Installation failed."))
+      return 1
+    }
+    spinner.stop(`Plugin added to ${color.cyan(pluginResult.configPath)}`)

-  spinner.start(`Writing ${PLUGIN_NAME} configuration`)
-  const omoResult = writeOmoConfig(config)
-  if (!omoResult.success) {
-    spinner.stop(`Failed to write config: ${omoResult.error}`)
-    p.outro(color.red("Installation failed."))
-    return 1
+    spinner.start(`Writing ${PLUGIN_NAME} configuration`)
+    const omoResult = writeOmoConfig(config)
+    if (!omoResult.success) {
+      spinner.stop(`Failed to write config: ${omoResult.error}`)
+      p.outro(color.red("Installation failed."))
+      return 1
+    }
+    spinner.stop(`Config written to ${color.cyan(omoResult.configPath)}`)
  }
-  spinner.stop(`Config written to ${color.cyan(omoResult.configPath)}`)

  if (!config.hasClaude) {
    p.log.info(
@@ -92,12 +116,19 @@ export async function runTuiInstaller(args: InstallArgs, version: string): Promi
    } catch (error) {
      const message = error instanceof Error ? error.message : String(error)
      spinner.stop(`Codex install failed ${color.yellow("[!]")}`)
+      if (!config.hasOpenCode) {
+        p.log.error(`Codex install failed: ${message}`)
+        p.outro(color.red("Installation failed."))
+        return 1
+      }
      p.log.warn(`Codex install failed (OpenCode install remains successful): ${message}`)
    }
  }

  p.log.success(color.bold(isUpdate ? "Configuration updated!" : "Installation complete!"))
-  p.log.message(`Run ${color.cyan("opencode")} to start!`)
+  if (config.hasOpenCode) {
+    p.log.message(`Run ${color.cyan("opencode")} to start!`)
+  }
  p.log.info("Anonymous telemetry is enabled by default. Disable it with OMO_SEND_ANONYMOUS_TELEMETRY=0 or OMO_DISABLE_POSTHOG=1.")
  p.log.info("Docs: docs/legal/privacy-policy.md and docs/legal/terms-of-service.md")

@@ -115,7 +146,7 @@ export async function runTuiInstaller(args: InstallArgs, version: string): Promi

  p.outro(color.green("oMoMoMoMo... Enjoy!"))

-  if ((config.hasClaude || config.hasGemini || config.hasCopilot) && !args.skipAuth) {
+  if (config.hasOpenCode && (config.hasClaude || config.hasGemini || config.hasCopilot) && !args.skipAuth) {
    const providers: string[] = []
    if (config.hasClaude) providers.push(`Anthropic ${color.gray("→ Claude Pro/Max")}`)
    if (config.hasGemini) providers.push(`Google ${color.gray("→ Gemini")}`)
@@ -1,13 +1,14 @@
 export type ClaudeSubscription = "no" | "yes" | "max20"
 export type BooleanArg = "no" | "yes"
+export type InstallPlatform = "opencode" | "codex" | "both"

 export interface InstallArgs {
  tui: boolean
+  platform?: InstallPlatform
  claude?: ClaudeSubscription
  openai?: BooleanArg
  gemini?: BooleanArg
  copilot?: BooleanArg
-  codex?: BooleanArg
  opencodeZen?: BooleanArg
  zaiCodingPlan?: BooleanArg
  kimiForCoding?: BooleanArg
@@ -17,6 +18,8 @@ export interface InstallArgs {
 }

 export interface InstallConfig {
+  platform: InstallPlatform
+  hasOpenCode: boolean
  hasClaude: boolean
  isMax20: boolean
  hasOpenAI: boolean
@@ -32,7 +32,7 @@ export function createToolContext(sessionID: string): ToolContext {
    worktree: "/project",
    abort: new AbortController().signal,
    metadata: () => {},
-    ask: async () => {},
+    ask: () => Effect.void,
  }
 }