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/core/src/unified_exec/session.rs

@@ -15,8 +15,8 @@ use crate::exec::SandboxType;
 use crate::exec::StreamOutput;
 use crate::exec::is_likely_sandbox_denied;
 use crate::truncate::truncate_middle;
-use codex_utils_pty::ExecCommandSession;
-use codex_utils_pty::SpawnedPty;
+use llmx_utils_pty::ExecCommandSession;
+use llmx_utils_pty::SpawnedPty;
 
 use super::UNIFIED_EXEC_OUTPUT_MAX_BYTES;
 use super::UnifiedExecError;

llmx-rs/core/src/unified_exec/session_manager.rs

@@ -301,7 +301,7 @@ impl UnifiedExecSessionManager {
             .split_first()
             .ok_or(UnifiedExecError::MissingCommandLine)?;
 
-        let spawned = codex_utils_pty::spawn_pty_process(
+        let spawned = llmx_utils_pty::spawn_pty_process(
             program,
             args,
             env.cwd.as_path(),