Conversation naming (#8991)

Session renaming:
- `/rename my_session`
- `/rename` without arg and passing an argument in `customViewPrompt`
- AppExitInfo shows resume hint using the session name if set instead of
uuid, defaults to uuid if not set
- Names are stored in `CODEX_HOME/sessions.jsonl`

Session resuming:
- codex resume <name> lookup for `CODEX_HOME/sessions.jsonl` first entry
matching the name and resumes the session

---------

Co-authored-by: jif-oai <jif@openai.com>

codex-rs/exec/src/cli.rs

@@ -114,7 +114,7 @@ pub enum Command {
 struct ResumeArgsRaw {
     // Note: This is the direct clap shape. We reinterpret the positional when --last is set
     // so "codex resume --last <prompt>" treats the positional as a prompt, not a session id.
-    /// Conversation/session id (UUID). When provided, resumes this session.
+    /// Conversation/session id (UUID) or thread name. UUIDs take precedence if it parses.
     /// If omitted, use --last to pick the most recent recorded session.
     #[arg(value_name = "SESSION_ID")]
     session_id: Option<String>,
@@ -144,7 +144,7 @@ struct ResumeArgsRaw {
 
 #[derive(Debug)]
 pub struct ResumeArgs {
-    /// Conversation/session id (UUID). When provided, resumes this session.
+    /// Conversation/session id (UUID) or thread name. UUIDs take precedence if it parses.
     /// If omitted, use --last to pick the most recent recorded session.
     pub session_id: Option<String>,
 

codex-rs/exec/src/event_processor_with_human_output.rs

@@ -750,7 +750,8 @@ impl EventProcessor for EventProcessorWithHumanOutput {
                 );
             }
             EventMsg::ShutdownComplete => return CodexStatus::Shutdown,
-            EventMsg::ExecApprovalRequest(_)
+            EventMsg::ThreadNameUpdated(_)
+            | EventMsg::ExecApprovalRequest(_)
             | EventMsg::ApplyPatchApprovalRequest(_)
             | EventMsg::TerminalInteraction(_)
             | EventMsg::ExecCommandOutputDelta(_)

codex-rs/exec/src/event_processor_with_jsonl_output.rs

@@ -117,6 +117,7 @@ impl EventProcessorWithJsonOutput {
     pub fn collect_thread_events(&mut self, event: &protocol::Event) -> Vec<ThreadEvent> {
         match &event.msg {
             protocol::EventMsg::SessionConfigured(ev) => self.handle_session_configured(ev),
+            protocol::EventMsg::ThreadNameUpdated(_) => Vec::new(),
             protocol::EventMsg::AgentMessage(ev) => self.handle_agent_message(ev),
             protocol::EventMsg::AgentReasoning(ev) => self.handle_reasoning_event(ev),
             protocol::EventMsg::ExecCommandBegin(ev) => self.handle_exec_command_begin(ev),

codex-rs/exec/src/lib.rs

@@ -59,12 +59,14 @@ use tracing::info;
 use tracing::warn;
 use tracing_subscriber::EnvFilter;
 use tracing_subscriber::prelude::*;
+use uuid::Uuid;
 
 use crate::cli::Command as ExecCommand;
 use crate::event_processor::CodexStatus;
 use crate::event_processor::EventProcessor;
 use codex_core::default_client::set_default_originator;
 use codex_core::find_thread_path_by_id_str;
+use codex_core::find_thread_path_by_name_str;
 
 enum InitialOperation {
     UserTurn {
@@ -619,8 +621,13 @@ async fn resolve_resume_path(
             }
         }
     } else if let Some(id_str) = args.session_id.as_deref() {
-        let path = find_thread_path_by_id_str(&config.codex_home, id_str).await?;
-        Ok(path)
+        if Uuid::parse_str(id_str).is_ok() {
+            let path = find_thread_path_by_id_str(&config.codex_home, id_str).await?;
+            Ok(path)
+        } else {
+            let path = find_thread_path_by_name_str(&config.codex_home, id_str).await?;
+            Ok(path)
+        }
     } else {
         Ok(None)
     }