jif a06545b311 Add opt-in history prefix preservation for full agent forks (#52535) ...

## What changed

Add `preserve_fork_prefix` to the multi-agent v2 configuration, defaulting to `false`. When enabled, full forks retain the parent's model-visible history, including commentary and tool records, and append the child's instructions. Legacy compaction without a reusable context baseline still rebuilds the child context.

Mark copied history as inherited, complete unfinished tool calls in the fork snapshot, and exclude inherited manual approvals from authorization review while retaining them in model context.

## Testing

Add coverage for preserved request prefixes, child instructions, legacy and paginated histories, Code Mode, missing inherited tool outputs, compaction fallback, and approval isolation across checkpoint replay. Update the noisy helper failure test to read its response before starting cleanup.

GitOrigin-RevId: ce9235dfa111c88d6ce66cb93d564fb63b326489

2026-10-09 11:08:24 +00:00

..

src

Add opt-in history prefix preservation for full agent forks (#52535)

2026-10-09 11:08:24 +00:00

BUILD.bazel

build: run buildifier from just fmt (#28125)

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

Cargo.toml

Support remote agent message boards in multi-agent sessions (#49267)

2026-09-29 13:52:04 +00:00