Codex Executor (#330)

backend/src/bin/generate_types.rs

@@ -14,7 +14,8 @@ export const EXECUTOR_TYPES: string[] = [
     "charm-opencode",
     "claude-code-router",
     "sst-opencode",
-    "aider"
+    "aider",
+    "codex",
 ];
 
 export const EDITOR_TYPES: EditorType[] = [
@@ -35,7 +36,8 @@ export const EXECUTOR_LABELS: Record<string, string> = {
     "charm-opencode": "Charm Opencode",
     "claude-code-router": "Claude Code Router",
     "sst-opencode": "SST Opencode",
-    "aider": "Aider"
+    "aider": "Aider",
+    "codex": "Codex"
 };
 
 export const EDITOR_LABELS: Record<string, string> = {

backend/src/executor.rs

@@ -10,7 +10,7 @@ use crate::{
     command_runner::{CommandError, CommandProcess, CommandRunner},
     executors::{
         AiderExecutor, AmpExecutor, CCRExecutor, CharmOpencodeExecutor, ClaudeExecutor,
-        EchoExecutor, GeminiExecutor, SetupScriptExecutor, SstOpencodeExecutor,
+        CodexExecutor, EchoExecutor, GeminiExecutor, SetupScriptExecutor, SstOpencodeExecutor,
     },
 };
 
@@ -403,6 +403,7 @@ pub enum ExecutorConfig {
     #[serde(alias = "opencode")]
     SstOpencode,
     Aider,
+    Codex,
 }
 
 // Constants for frontend
@@ -427,6 +428,7 @@ impl FromStr for ExecutorConfig {
             "claude-code-router" => Ok(ExecutorConfig::ClaudeCodeRouter),
             "sst-opencode" => Ok(ExecutorConfig::SstOpencode),
             "aider" => Ok(ExecutorConfig::Aider),
+            "codex" => Ok(ExecutorConfig::Codex),
             "setup-script" => Ok(ExecutorConfig::SetupScript {
                 script: "setup script".to_string(),
             }),
@@ -447,6 +449,7 @@ impl ExecutorConfig {
             ExecutorConfig::CharmOpencode => Box::new(CharmOpencodeExecutor),
             ExecutorConfig::SstOpencode => Box::new(SstOpencodeExecutor::new()),
             ExecutorConfig::Aider => Box::new(AiderExecutor::new()),
+            ExecutorConfig::Codex => Box::new(CodexExecutor::new()),
             ExecutorConfig::SetupScript { script } => {
                 Box::new(SetupScriptExecutor::new(script.clone()))
             }
@@ -481,6 +484,9 @@ impl ExecutorConfig {
                 }
             }
             ExecutorConfig::Aider => None,
+            ExecutorConfig::Codex => {
+                dirs::home_dir().map(|home| home.join(".codex").join("config.toml"))
+            }
             ExecutorConfig::SetupScript { .. } => None,
         }
     }
@@ -497,6 +503,7 @@ impl ExecutorConfig {
             ExecutorConfig::Gemini => Some(vec!["mcpServers"]),
             ExecutorConfig::ClaudeCodeRouter => Some(vec!["mcpServers"]),
             ExecutorConfig::Aider => None, // Aider doesn't support MCP. https://github.com/Aider-AI/aider/issues/3314
+            ExecutorConfig::Codex => None, // Codex uses TOML config, frontend doesn't handle TOML yet
             ExecutorConfig::SetupScript { .. } => None, // Setup scripts don't support MCP
         }
     }
@@ -505,7 +512,10 @@ impl ExecutorConfig {
     pub fn supports_mcp(&self) -> bool {
         !matches!(
             self,
-            ExecutorConfig::Echo | ExecutorConfig::Aider | ExecutorConfig::SetupScript { .. }
+            ExecutorConfig::Echo
+                | ExecutorConfig::Aider
+                | ExecutorConfig::SetupScript { .. }
+                | ExecutorConfig::Codex
         )
     }
 
@@ -521,6 +531,7 @@ impl ExecutorConfig {
             ExecutorConfig::Gemini => "Gemini",
             ExecutorConfig::ClaudeCodeRouter => "Claude Code Router",
             ExecutorConfig::Aider => "Aider",
+            ExecutorConfig::Codex => "Codex",
             ExecutorConfig::SetupScript { .. } => "Setup Script",
         }
     }
@@ -538,6 +549,7 @@ impl std::fmt::Display for ExecutorConfig {
             ExecutorConfig::CharmOpencode => "charm-opencode",
             ExecutorConfig::ClaudeCodeRouter => "claude-code-router",
             ExecutorConfig::Aider => "aider",
+            ExecutorConfig::Codex => "codex",
             ExecutorConfig::SetupScript { .. } => "setup-script",
         };
         write!(f, "{}", s)

backend/src/executors/mod.rs

@@ -4,6 +4,7 @@ pub mod ccr;
 pub mod charm_opencode;
 pub mod claude;
 pub mod cleanup_script;
+pub mod codex;
 pub mod dev_server;
 pub mod echo;
 pub mod gemini;
@@ -16,6 +17,7 @@ pub use ccr::CCRExecutor;
 pub use charm_opencode::CharmOpencodeExecutor;
 pub use claude::ClaudeExecutor;
 pub use cleanup_script::CleanupScriptExecutor;
+pub use codex::CodexExecutor;
 pub use dev_server::DevServerExecutor;
 pub use echo::EchoExecutor;
 pub use gemini::GeminiExecutor;

backend/src/services/process_service.rs

@@ -1,3 +1,5 @@
+use std::str::FromStr;
+
 use sqlx::SqlitePool;
 use tracing::{debug, info};
 use uuid::Uuid;
@@ -702,16 +704,17 @@ impl ProcessService {
 
     /// Resolve executor configuration from string name
     fn resolve_executor_config(executor_name: &Option<String>) -> crate::executor::ExecutorConfig {
-        match executor_name.as_ref().map(|s| s.as_str()) {
-            Some("claude") => crate::executor::ExecutorConfig::Claude,
-            Some("claude-plan") => crate::executor::ExecutorConfig::ClaudePlan,
-            Some("claude-code-router") => crate::executor::ExecutorConfig::ClaudeCodeRouter,
-            Some("amp") => crate::executor::ExecutorConfig::Amp,
-            Some("gemini") => crate::executor::ExecutorConfig::Gemini,
-            Some("charm-opencode") => crate::executor::ExecutorConfig::CharmOpencode,
-            Some("sst-opencode") => crate::executor::ExecutorConfig::SstOpencode,
-            Some("aider") => crate::executor::ExecutorConfig::Aider,
-            _ => crate::executor::ExecutorConfig::Echo, // Default for "echo" or None
+        if let Some(name) = executor_name {
+            crate::executor::ExecutorConfig::from_str(name).unwrap_or_else(|_| {
+                tracing::warn!(
+                    "Unknown executor type '{}', defaulting to EchoExecutor",
+                    name
+                );
+                crate::executor::ExecutorConfig::Echo
+            })
+        } else {
+            tracing::warn!("No executor type specified, defaulting to EchoExecutor");
+            crate::executor::ExecutorConfig::Echo
         }
     }