* feat: add assistant turn branching
* fix(threads): skip workspace clone when branching from historical turn
Workspace files are not checkpointed, so cloning them onto a branch
rooted at an older assistant turn leaked files created in a later
timeline. Restrict the best-effort workspace copy to branches taken from
the latest turn; historical-turn branches now report
workspace_clone_mode="skipped_historical_turn" and keep only the
restored message history.
* style(frontend): fix prettier formatting in e2e mock-api
Collapse the branch-title normalization chain onto a single line to
satisfy the frontend lint (prettier --check) CI gate.
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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
* fix: bucket subagent token usage into RunRow.subagent_tokens
Add caller-bucketed token tracking to RunJournal so subagent and
middleware LLM calls are written to the correct RunRow columns instead
of all falling into lead_agent_tokens (default 0).
- RunJournal: accumulate _lead_agent_tokens / _subagent_tokens /
_middleware_tokens in on_llm_end, deduped by langchain run_id.
Add record_external_llm_usage_records() for external sources
(respects track_token_usage flag). Return caller buckets from
get_completion_data().
- SubagentTokenCollector: new lightweight callback handler that
collects LLM usage within subagent execution.
- SubagentExecutor: wire collector into subagent run_config and sync
records to SubagentResult on every chunk (timeout/cancel safe).
- SubagentResult: add token_usage_records and usage_reported fields.
- task_tool: report subagent usage to parent RunJournal on every
terminal status (COMPLETED/FAILED/CANCELLED/TIMED_OUT), including
the CancelledError path, guarded against double-reporting.
No DB migration needed — RunRow columns already exist.
* Potential fix for pull request finding
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
* fix: address token usage review feedback
* Address review follow-ups
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
