Finish moving codex exec to app-server (#15424)

This PR completes the conversion of non-interactive `codex exec` to use
app server rather than directly using core events and methods.

### Summary
- move `codex-exec` off exec-owned `AuthManager` and `ThreadManager`
state
- route exec bootstrap, resume, and auth refresh through existing
app-server paths
- replace legacy `codex/event/*` decoding in exec with typed app-server
notification handling
- update human and JSONL exec output adapters to translate existing
app-server notifications only
- clean up "app server client" layer by eliminating support for legacy
notifications; this is no longer needed
- remove exposure of `authManager` and `threadManager` from "app server
client" layer

### Testing
- `exec` has pretty extensive unit and integration tests already, and
these all pass
- In addition, I asked Codex to put together a comprehensive manual set
of tests to cover all of the `codex exec` functionality (including
command-line options), and it successfully generated and ran these tests

codex-rs/exec/Cargo.toml

@@ -3,6 +3,7 @@ name = "codex-exec"
 version.workspace = true
 edition.workspace = true
 license.workspace = true
+autotests = false
 
 [[bin]]
 name = "codex-exec"
@@ -12,6 +13,10 @@ path = "src/main.rs"
 name = "codex_exec"
 path = "src/lib.rs"
 
+[[test]]
+name = "all"
+path = "tests/all.rs"
+
 [lints]
 workspace = true
 
@@ -28,13 +33,10 @@ codex-otel = { workspace = true }
 codex-protocol = { workspace = true }
 codex-utils-absolute-path = { workspace = true }
 codex-utils-cli = { workspace = true }
-codex-utils-elapsed = { workspace = true }
 codex-utils-oss = { workspace = true }
-codex-utils-sandbox-summary = { workspace = true }
 owo-colors = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
-shlex = { workspace = true }
 supports-color = { workspace = true }
 tokio = { workspace = true, features = [
     "io-std",
@@ -63,7 +65,6 @@ opentelemetry = { workspace = true }
 opentelemetry_sdk = { workspace = true }
 predicates = { workspace = true }
 pretty_assertions = { workspace = true }
-rmcp = { workspace = true }
 tempfile = { workspace = true }
 tracing-opentelemetry = { workspace = true }
 uuid = { workspace = true }

codex-rs/exec/src/cli.rs

@@ -86,10 +86,6 @@ pub struct Cli {
     #[arg(long = "color", value_enum, default_value_t = Color::Auto)]
     pub color: Color,
 
-    /// Force cursor-based progress updates in exec mode.
-    #[arg(long = "progress-cursor", default_value_t = false)]
-    pub progress_cursor: bool,
-
     /// Print events to stdout as JSONL.
     #[arg(
         long = "json",

codex-rs/exec/src/event_processor.rs

@@ -1,13 +1,13 @@
 use std::path::Path;
 
+use codex_app_server_protocol::ServerNotification;
 use codex_core::config::Config;
-use codex_protocol::protocol::Event;
 use codex_protocol::protocol::SessionConfiguredEvent;
 
-pub(crate) enum CodexStatus {
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum CodexStatus {
     Running,
     InitiateShutdown,
-    Shutdown,
 }
 
 pub(crate) trait EventProcessor {
@@ -19,8 +19,11 @@ pub(crate) trait EventProcessor {
         session_configured: &SessionConfiguredEvent,
     );
 
-    /// Handle a single event emitted by the agent.
-    fn process_event(&mut self, event: Event) -> CodexStatus;
+    /// Handle a single typed app-server notification emitted by the agent.
+    fn process_server_notification(&mut self, notification: ServerNotification) -> CodexStatus;
+
+    /// Handle a local exec warning that is not represented as an app-server notification.
+    fn process_warning(&mut self, message: String) -> CodexStatus;
 
     fn print_final_output(&mut self) {}
 }