[core] add optional status_code to error events

[celia-oai]

We want to better uncover error status code for clients. Add an optional status_code to error events (for core error, stream error events) so app server could uncover the status code from the client side later.

in event log:

< {
<   "method": "codex/event/stream_error",
<   "params": {
<     "conversationId": "019a9a32-f576-7292-9711-8e57e8063536",
<     "id": "0",
<     "msg": {
<       "message": "Reconnecting... 5/5",
<       "status_code": 401,
<       "type": "stream_error"
<     }
<   }
< }
< {
<   "method": "codex/event/error",
<   "params": {
<     "conversationId": "019a9a32-f576-7292-9711-8e57e8063536",
<     "id": "0",
<     "msg": {
<       "message": "exceeded retry limit, last status: 401 Unauthorized, request id: 9a0cb03a485067f7-SJC",
<       "status_code": 401,
<       "type": "error"
<     }
<   }
< }

[chatgpt-codex-connector]

💡 Codex Review

codex/codex-rs/protocol/src/protocol.rs

Lines 1355 to 1361 in 6ad8a5d

	}
	#[derive(Debug, Clone, Deserialize, Serialize, JsonSchema, TS)]
	pub struct StreamErrorEvent {
	pub message: String,
	#[serde(default)]
	pub status_code: Option<u16>,

Restore StreamErrorEvent struct literals

With this commit StreamErrorEvent now has a new status_code field, but the literals in codex-rs/tui/src/chatwidget/tests.rs (e.g. the stream_error_updates_status_indicator test) were not updated and still construct StreamErrorEvent { message: … }. Because the struct is not marked #[non_exhaustive] and the field isn’t given a default in the literal, cargo test -p codex-tui will no longer compile. Please add status_code: None (or similar) everywhere we construct that struct.

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[owenlin0]

nice! 👍