Phase 2: Rust Workspace Transformation (Part 1)

- Renamed directory: codex-backend-openapi-models -> llmx-backend-openapi-models
- Updated all Cargo.toml files:
  - Package names: codex-* -> llmx-*
  - Library names: codex_* -> llmx_*
  - Workspace dependencies updated
- Renamed Rust source files:
  - codex*.rs -> llmx*.rs (all modules)
  - codex_conversation -> llmx_conversation
  - codex_delegate -> llmx_delegate
  - codex_message_processor -> llmx_message_processor
  - codex_tool_* -> llmx_tool_*
- Updated all Rust imports:
  - use codex_* -> use llmx_*
  - mod codex* -> mod llmx*
- Updated environment variables in code:
  - CODEX_HOME -> LLMX_HOME
  - .codex -> .llmx paths
- Updated protocol crate lib name for proper linking

Note: Some compilation errors remain (type inference issues) but all
renaming is complete. Will fix compilation in next phase.

🤖 Generated with Claude Code

llmx-rs/rmcp-client/src/oauth.rs

@@ -42,12 +42,12 @@ use std::time::SystemTime;
 use std::time::UNIX_EPOCH;
 use tracing::warn;
 
-use codex_keyring_store::DefaultKeyringStore;
-use codex_keyring_store::KeyringStore;
+use llmx_keyring_store::DefaultKeyringStore;
+use llmx_keyring_store::KeyringStore;
 use rmcp::transport::auth::AuthorizationManager;
 use tokio::sync::Mutex;
 
-use crate::find_codex_home::find_codex_home;
+use crate::find_llmx_home::find_llmx_home;
 
 const KEYRING_SERVICE: &str = "Codex MCP Credentials";
 
@@ -468,7 +468,7 @@ fn compute_store_key(server_name: &str, server_url: &str) -> Result<String> {
 }
 
 fn fallback_file_path() -> Result<PathBuf> {
-    let mut path = find_codex_home()?;
+    let mut path = find_llmx_home()?;
     path.push(FALLBACK_FILENAME);
     Ok(path)
 }
@@ -545,7 +545,7 @@ mod tests {
     use std::sync::PoisonError;
     use tempfile::tempdir;
 
-    use codex_keyring_store::tests::MockKeyringStore;
+    use llmx_keyring_store::tests::MockKeyringStore;
 
     struct TempCodexHome {
         _guard: MutexGuard<'static, ()>,