Restore parallel normalization tolerance for provider/model outputs that stringify the tool_calls array inside tool_args.
The wrapper still expects normal tool-call objects after decoding, so nested parallel and document_query guards continue to run through the same validation path.
Skip persisted tool-result files for BACKGROUND contexts, remove ephemeral direct parallel worker chat folders during cleanup, and ignore chat directories without chat.json during startup loading.
Add focused regressions for background output persistence, parallel worker cleanup, and orphan directory loading.
Reject document_query during parallel tool-call normalization before worker jobs are started. Add prompt guidance so the model avoids batching document_query, and update DOX plus regressions for the new sequential-only contract.
Keep running parallel jobs alive when an await call reaches its timeout so agents can await the same job ids again instead of cancelling child work. Distinguish direct background tool workers from call_subordinate child chats so nested subordinate chats can use parallel normally while true worker recursion remains blocked. Update the parallel prompt, DOX notes, and regressions for non-destructive timeout and non-blocking collect semantics.
- add a parallel wrapper and runtime for concurrent background tool calls
- run parallel call_subordinate jobs as child chats with visible subagent steps that match normal subordinate args
- render parallel child tool steps with normal tool-call args while keeping job handles in wrapper results and prompt extras
- group parallel child chats in the sidebar with persistent accordion and caret behavior
- add prompt, extension, DOX, and regression coverage
