jif 766d2377a8 Add an opt-in flag to defer mailbox preemption (#47913) ...

## Why

Agent messages arriving during a response can interrupt sampling at reasoning or commentary boundaries, cutting off remaining tool calls.

## What changed

Add the disabled-by-default `defer_mailbox_preemption` feature flag. When enabled, sampling continues past these boundaries and queued agent messages reach the next model request alongside completed tool results.

## Testing

Add streaming scenarios and snapshots for reasoning and commentary boundaries with deferral enabled and disabled. Verify that deferral preserves the planned tool call and that both queued messages arrive in order in the next request.

GitOrigin-RevId: d6846dd73b3afb47e7293f3b1aa2abcd04e37853

2026-09-24 18:38:58 +00:00

..

src

Add an opt-in flag to defer mailbox preemption (#47913)

2026-09-24 18:38:58 +00:00

BUILD.bazel

build: run buildifier from just fmt (#28125)

2026-06-13 21:43:39 -07:00

Cargo.toml

Reduce dependency coupling in shared configuration crates (#47713)

2026-09-24 01:50:36 +00:00