Expose assistant content token counts in completion notifications (#59041)

## What changed

Add optional `contentTokenCount` metadata to `item/completed` notifications, carrying the producer-supplied token count for each completed assistant message in default and plan modes. Counts include any sampled footer and are `null` when unavailable.

Keep this telemetry separate from stored thread items and omit it from subsequent model requests. Update the protocol schemas and generated TypeScript and Python types.

## Testing

Add coverage for per-message counts, including zero, in default and plan modes; missing and malformed metadata; backward-compatible notification decoding; and exclusion from subsequent model requests.

GitOrigin-RevId: 35973037a42650fa2d7569da8e88cb81215cf971
This commit is contained in:
aojiao-oai
2026-11-03 02:26:29 +00:00
committed by copyberry
parent e839b828fb
commit 16ddd538bd
48 changed files with 443 additions and 39 deletions
+3 -1
View File
@@ -2425,7 +2425,9 @@ mod tests {
|| (path == Path::new("v2/ProcessExitedNotification.ts")
&& field_prefix.trim() == "outputDrainTimedOut?")
|| (path == Path::new("v2/MisalignmentErrorDetails.ts")
&& field_prefix.trim() == "reviewTarget?");
&& field_prefix.trim() == "reviewTarget?")
|| (path == Path::new("v2/ItemCompletedNotification.ts")
&& field_prefix.trim() == "contentTokenCount?");
if field_prefix.chars().rev().find(|c| !c.is_whitespace()) == Some('?')
&& !allow_optional_nullable
&& !legacy_optional_nullable_field