feat: add Codex CLI support to setup wizard (#387)

* feat: add Codex CLI support to setup wizard

Add Codex (OpenAI CLI) as a client option in the setup wizard.

- Add codex.md client definition with TOML config format
- Support stdio and streamable-http transports
- Add configuration generation for Codex CLI commands
- Uses OpenAI logo and order position 13

Implements #382

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* fix: correct Codex CLI syntax for Windows compatibility

- Remove backslashes from commands (Windows incompatible)
- Use correct `-- command args` syntax instead of `--command --args`
- Update TOML examples to match actual config format
- Use `[mcp_servers.name]` sections instead of `[[mcp.servers]]`
- Test verified with actual `codex mcp add` command

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: julienld

site/src/content/clients/codex.md

@@ -0,0 +1,82 @@
+---
+name: Codex
+company: OpenAI
+logo: /logos/openai.svg
+transports: ['stdio', 'streamable-http']
+configFormat: cli
+configLocation: ~/.codex/config.toml
+accuracy: 4
+order: 13
+---
+
+## Configuration
+
+Codex CLI supports MCP servers via TOML configuration with stdio and HTTP streaming transports.
+
+### Config File Location
+
+- **Configuration:** `~/.codex/config.toml`
+- Shared between CLI and IDE extension
+
+### stdio Configuration (Local)
+
+```toml
+[mcp_servers.home-assistant]
+command = "uvx"
+args = ["ha-mcp@latest"]
+
+[mcp_servers.home-assistant.env]
+HOMEASSISTANT_URL = "{{HOMEASSISTANT_URL}}"
+HOMEASSISTANT_TOKEN = "{{HOMEASSISTANT_TOKEN}}"
+```
+
+### Streamable HTTP Configuration (Network/Remote)
+
+```toml
+[mcp_servers.home-assistant]
+url = "{{MCP_SERVER_URL}}"
+```
+
+### With Authentication
+
+```toml
+[mcp_servers.home-assistant]
+url = "{{MCP_SERVER_URL}}"
+
+[mcp_servers.home-assistant.headers]
+Authorization = "Bearer {{API_TOKEN}}"
+```
+
+## Quick Setup with CLI Commands
+
+### stdio (Local)
+
+```bash
+codex mcp add homeassistant --env HOMEASSISTANT_URL={{HOMEASSISTANT_URL}} --env HOMEASSISTANT_TOKEN={{HOMEASSISTANT_TOKEN}} -- uvx ha-mcp@latest
+```
+
+### HTTP Streaming (Network/Remote)
+
+```bash
+codex mcp add home-assistant --url {{MCP_SERVER_URL}}
+```
+
+## Management Commands
+
+```bash
+# List configured servers
+codex mcp list
+
+# Show server details
+codex mcp get home-assistant
+
+# Remove a server
+codex mcp remove home-assistant
+```
+
+## Notes
+
+- Configuration uses TOML format (not JSON)
+- Supports stdio and HTTP streaming transports
+- OAuth 2.0 authentication available for remote servers
+- Config file shared between CLI and IDE extension

site/src/pages/setup.astro

@@ -1392,6 +1392,17 @@ mcpServers:
         } else {
           config = `gemini mcp add --transport http home-assistant ${mcpUrl}`;
         }
+      } else if (state.client.id === 'codex') {
+        // Codex CLI
+        if (isStdio) {
+          if (isDocker) {
+            config = `codex mcp add homeassistant --env HOMEASSISTANT_URL={{HOMEASSISTANT_URL}} --env HOMEASSISTANT_TOKEN={{HOMEASSISTANT_TOKEN}} -- docker run --rm -i ghcr.io/homeassistant-ai/ha-mcp:latest`;
+          } else {
+            config = `codex mcp add homeassistant --env HOMEASSISTANT_URL={{HOMEASSISTANT_URL}} --env HOMEASSISTANT_TOKEN={{HOMEASSISTANT_TOKEN}} -- uvx ha-mcp@latest`;
+          }
+        } else {
+          config = `codex mcp add home-assistant --url ${mcpUrl}`;
+        }
       } else {
         // Claude Code
         if (isStdio) {