refactor: remove external product references from codebase (#539)

- Remove OpenCode and Codex references from TUI components
- Update engine comments to remove competitor mentions
- Remove codex model alias and related presets
- Rename .codex sandbox references to .cortex
- Update function names to avoid external product confusion
- Clean up SubagentsDialog component descriptions

Author: echobt

Cargo.toml

@@ -69,7 +69,7 @@ members = [
     "src/cortex-skills",
     "src/cortex-prompt-harness",
 
-    # CLI - Features (Phase 3 - Codex-inspired)
+    # CLI - Features (Phase 3)
     "src/cortex-collab",
     "src/cortex-network-proxy",
     "src/cortex-shell-snapshot",
@@ -228,7 +228,7 @@ cortex-ollama = { path = "src/cortex-ollama" }
 cortex-skills = { path = "src/cortex-skills" }
 cortex-prompt-harness = { path = "src/cortex-prompt-harness" }
 
-# Phase 3 - Codex-inspired crates
+# Phase 3 crates
 cortex-collab = { path = "src/cortex-collab" }
 cortex-network-proxy = { path = "src/cortex-network-proxy" }
 cortex-shell-snapshot = { path = "src/cortex-shell-snapshot" }

src/cortex-agents/src/control.rs

@@ -1,7 +1,7 @@
 //! Agent control for multi-agent operations.
 //!
 //! Provides a control-plane interface for managing agent threads,
-//! inspired by OpenAI Codex's AgentControl system.
+//! handling spawning, lifecycle, and inter-agent communication.
 
 use crate::AgentInfo;
 use std::collections::HashMap;

src/cortex-cli/src/run_cmd/mod.rs

@@ -1,6 +1,6 @@
 //! Run command for non-interactive Cortex CLI execution.
 //!
-//! Provides a comprehensive run command similar to OpenCode's run functionality:
+//! Provides a comprehensive run command for batch execution:
 //! - `cortex run [message..]` - Execute with a message prompt
 //! - `--command` - Execute a predefined command
 //! - `--continue/-c` - Continue the last session

src/cortex-collab/src/lib.rs

@@ -1,6 +1,6 @@
 //! Multi-agent collaboration system for Cortex CLI.
 //!
-//! This crate implements multi-agent collaboration features inspired by OpenAI Codex:
+//! This crate implements multi-agent collaboration features:
 //! - Agent spawning and lifecycle management
 //! - Inter-agent communication
 //! - Wait/sync mechanisms with timeout

src/cortex-common/src/model_presets/aliases.rs

@@ -38,10 +38,6 @@ pub const MODEL_ALIASES: &[ModelAlias] = &[
         alias: "o3",
         model: "openai/o3",
     },
-    ModelAlias {
-        alias: "codex",
-        model: "openai/gpt-5.2-codex",
-    },
     // Google models
     ModelAlias {
         alias: "gemini",
@@ -103,7 +99,6 @@ mod tests {
         assert_eq!(resolve_model_alias("opus"), "anthropic/claude-opus-4.5");
         assert_eq!(resolve_model_alias("gpt4"), "openai/gpt-4o");
         assert_eq!(resolve_model_alias("haiku"), "anthropic/claude-haiku-4.5");
-        assert_eq!(resolve_model_alias("codex"), "openai/gpt-5.2-codex");
         assert_eq!(resolve_model_alias("r1"), "deepseek/deepseek-r1");
     }
 

src/cortex-common/src/model_presets/presets.rs

@@ -633,15 +633,6 @@ pub const MODEL_PRESETS: &[ModelPreset] = &[
         supports_tools: true,
         supports_reasoning: false,
     },
-    ModelPreset {
-        id: "openai/gpt-5.2-codex",
-        name: "GPT-5.2 Codex (via Cortex) - DEFAULT",
-        provider: "cortex",
-        context_window: 256_000,
-        supports_vision: true,
-        supports_tools: true,
-        supports_reasoning: true,
-    },
     // Other Cortex models
     ModelPreset {
         id: "openai/gpt-4o",

src/cortex-core/src/widgets/brain.rs

@@ -7,7 +7,7 @@
 //! Uses sine wave radial expansion from center:
 //! - Wave expands outward from brain center
 //! - 2-second cycle (slow, hypnotic)
-//! - Green gradient (#00FFA3 Codex accent)
+//! - Green gradient (#00FFA3)
 //!
 //! # Example
 //! ```
@@ -62,7 +62,7 @@ const WAVE_SPEED: f32 = std::f32::consts::PI * 2.0;
 /// Wave scale: controls the "wavelength" of radial rings
 const WAVE_SCALE: f32 = 6.0;
 
-/// Codex accent green color
+/// Accent green color
 const ACCENT_GREEN: (u8, u8, u8) = (0x00, 0xFF, 0xA3);
 
 /// Dark green base color
@@ -194,7 +194,7 @@ impl Brain {
 
     /// Gets the style for a character based on wave intensity.
     ///
-    /// Creates a gradient from dark green to bright Codex green (#00FFA3).
+    /// Creates a gradient from dark green to bright green (#00FFA3).
     fn get_wave_style(&self, base_density: f32, wave: f32) -> Style {
         // Combine base density with wave for final brightness
         let brightness = base_density * (0.4 + wave * 0.6 * self.intensity);

src/cortex-engine/src/agent/orchestrator.rs

@@ -267,7 +267,7 @@ impl Orchestrator {
 
             // If no tool calls, check if we need to request a summary
             if tool_calls.is_empty() {
-                // OpenCode pattern: If the model finished with no text after doing tool work,
+                // If the model finished with no text after doing tool work,
                 // add a synthetic message asking for a summary and call the model one more time.
                 // This ensures we get a meaningful response instead of empty output.
                 let has_no_text = text.as_ref().map(|t| t.trim().is_empty()).unwrap_or(true);
@@ -277,7 +277,7 @@ impl Orchestrator {
                     // Mark that we've requested a summary to avoid infinite loop
                     ctx.summary_requested = true;
 
-                    // Add synthetic user message asking for summary (OpenCode pattern)
+                    // Add synthetic user message asking for summary
                     let _ = self
                         .context
                         .add_message(Message::user(
@@ -310,7 +310,7 @@ impl Orchestrator {
         }
 
         // Use the last text segment as the primary response for subagents
-        // This follows OpenCode's pattern of using findLast() for text parts
+        // Uses findLast() logic for text parts to get the final segment
         // If there's meaningful last_text_segment, prefer it; otherwise use full response
         let effective_response = if !last_text_segment.trim().is_empty() {
             // The last segment has content - use it as the response

src/cortex-engine/src/config/loader.rs

@@ -2,7 +2,7 @@
 //!
 //! Supports multiple configuration formats:
 //! - TOML (`.toml`) - Primary format
-//! - JSON with comments (`.json`, `.jsonc`) - OpenCode-compatible format
+//! - JSON with comments (`.json`, `.jsonc`) - JSONC format
 
 use std::path::{Path, PathBuf};
 
@@ -694,7 +694,7 @@ model = "sync-model"
     #[test]
     fn test_parse_json_config() {
         let json_content = r#"{
-            // OpenCode-style config with comments
+            // JSON with comments (JSONC) config
             "model": "claude-3-opus",
             "model_provider": "anthropic"
         }"#;

src/cortex-engine/src/config/types.rs

@@ -10,7 +10,7 @@ use crate::custom_command::CustomCommandConfig;
 use crate::plugin::{PluginConfigEntry, PluginSettings};
 
 /// Permission level for granular permission control.
-/// Follows OpenCode-style permission configuration.
+/// Supports three-tier allow/ask/deny permission model.
 #[derive(Debug, Clone, Copy, Default, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(rename_all = "lowercase")]
 pub enum PermissionLevel {
@@ -34,7 +34,7 @@ impl std::fmt::Display for PermissionLevel {
 }
 
 /// Permission configuration structure.
-/// Supports OpenCode-style granular permission control.
+/// Supports granular permission control per operation type.
 #[derive(Debug, Clone, Default, PartialEq, Deserialize)]
 pub struct PermissionConfig {
     /// Default permission level for edit operations.