rhan-oai fbdbc6b2fe [codex-analytics] emit tool item events from item lifecycle (#17090)
## Why

After the tool-item schemas are in place, analytics needs to emit them
from the app-server item lifecycle rather than requiring bespoke
tracking at each callsite. The reducer should also reuse the shared
thread analytics context introduced below it in the stack so later event
families do not repeat the same reducer joins or missing-state ladder.

## What changed

- Tracks tool-item completion notifications and emits the matching tool
analytics event when a terminal item arrives.
- Derives event-specific payload details for command execution, file
changes, MCP calls, dynamic tools, collaboration tools, web search, and
image generation.
- Denormalizes thread, app-server client, runtime, and subagent
provenance metadata through the shared thread analytics context.
- Adds reducer coverage for item lifecycle emission and subagent
metadata inheritance.

## Duration semantics

`duration_ms` is computed from the app-server item lifecycle timestamps:
`completed_at_ms - started_at_ms`. That makes it the duration of the
lifecycle Codex observed locally, not necessarily the upstream
provider's full execution time.

- Web search usually has a meaningful observed lifecycle because
Responses can send `response.output_item.added` before
`response.output_item.done`; in that case `started_at_ms` comes from the
added event and `completed_at_ms` comes from the done event.
- Image generation can be much less precise. In the current observed
stream, image generation often arrives only as a completed
`response.output_item.done`; when there is no earlier added event, Codex
synthesizes the started item immediately before completion, so
`duration_ms` can be `0` even though upstream image generation took
longer.
- Standalone web search and standalone image generation work is expected
to land after this stack. Those paths may introduce more direct
lifecycle events or timing points, so the current
web-search/image-generation duration semantics should be treated as the
best available item-lifecycle approximation, not the final latency
contract for those tool families.
- `execution_duration_ms` is populated only where the completed item
already carries a native execution duration; otherwise it remains `null`
while `duration_ms` still reflects the local lifecycle interval.

## Currently placeholder / partial fields

Some fields are included in the schema for the intended steady-state
contract, but this PR does not yet populate them from real
approval/review state:

- `review_count`, `guardian_review_count`, and `user_review_count`
currently default to `0`.
- `final_approval_outcome` currently defaults to `unknown`.
- `requested_additional_permissions` and `requested_network_access`
currently default to `false`.

## Verification

- `cargo test -p codex-analytics`

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/17090).
* #18748
* #18747
* __->__ #17090
* #17089
* #20514
2026-05-06 20:27:41 +00:00
2026-05-03 10:23:09 -07:00
2026-04-24 17:49:29 -07:00
2026-04-24 17:49:29 -07:00
2026-04-07 10:55:58 -07:00

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