Owen Lin 3449e00bc9 feat(otel, core): record turn TTFT and TTFM metrics in codex-core (#13630) ...

### Summary
This adds turn-level latency metrics for the first model output and the
first completed agent message.
- `codex.turn.ttft.duration_ms` starts at turn start and records on the
first output signal we see from the model. That includes normal
assistant text, reasoning deltas, and non-text outputs like tool-call
items.
- `codex.turn.ttfm.duration_ms` also starts at turn start, but it
records when the first agent message finishes streaming rather than when
its first delta arrives.

### Implementation notes
The timing is tracked in codex-core, not app-server, so the definition
stays consistent across CLI, TUI, and app-server clients.

I reused the existing turn lifecycle boundary that already drives
`codex.turn.e2e_duration_ms`, stored the turn start timestamp in turn
state, and record each metric once per turn.

I also wired the new metric names into the OTEL runtime metrics summary
so they show up in the same in-memory/debug snapshot path as the
existing timing metrics.

3449e00bc9 · 2026-03-06 10:23:48 -08:00

History

..

compact.rs

feat(core, tracing): add a span representing a turn (#13424)

2026-03-04 11:09:17 -08:00

ghost_snapshot.rs

feat(core, tracing): add a span representing a turn (#13424)

2026-03-04 11:09:17 -08:00

mod.rs

feat(otel, core): record turn TTFT and TTFM metrics in codex-core (#13630)

2026-03-06 10:23:48 -08:00

regular.rs

feat(core, tracing): add a span representing a turn (#13424)

2026-03-04 11:09:17 -08:00

review.rs

feat(core, tracing): add a span representing a turn (#13424)

2026-03-04 11:09:17 -08:00

undo.rs

feat(core, tracing): add a span representing a turn (#13424)

2026-03-04 11:09:17 -08:00

user_shell.rs

refactor: prepare unified exec for zsh-fork backend (#13392)

2026-03-05 08:55:12 +00:00