## What changed
Add the default-disabled `critical_path_timing` feature to capture dependency paths for root-agent turns. Connect direct tool dispatch, execution-lock handoffs, and completed tool batches to turn timing so overlapping work shares its common history without double counting.
Omit captures for unsupported dependencies, including CodeMode, agent communication, approval review, and user waits. Settle aborted tasks before freezing timing, invalidate captures on forced teardown, and apply runtime feature changes only to future turns.
## Testing
Add coverage for serial and overlapping tool dispatch, execution-lock dependency handoffs, cancellation, unsupported paths, frozen timing after completion, and configuration refresh boundaries.
GitOrigin-RevId: 71458b654b1c4a05799886928b449c948ea33109
## What changed
Add the `codex-direct-tool-timing` crate to record tool execution, automated reviews, human waits, and dependency paths. Human waits take precedence over overlapping reviews, and dependency waits with unavailable history are recorded as unknown time.
Invocation guards complete each call once, explicitly or on drop. Separate invocation identities prevent late review or wait guards from affecting calls that reuse an ID; duplicate active IDs disable ambiguous path attribution. Batch timing exposes the last-finishing invocation's path once all calls complete.
## Testing
Add unit tests for parallel batch completion, duplicate and reused call IDs, cancellation, missing dependency history, overlapping reviews and human waits, and nested wait guards.
GitOrigin-RevId: 8b251f51a0c52342657f2d244524b562a371bd8e
taohong-oai